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\n  \n 2023\n \n \n (15)\n \n \n
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\n \n\n \n \n \n \n \n Impact of Wood Moisture Content on Structural Integrity of Wood Under Dynamic Loads.\n \n \n \n\n\n \n Emmerich, L.; and Brischke, C.\n\n\n \n\n\n\n , 72(4): 243–250. 2023.\n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{emmerich_impact_2023,\n\ttitle = {Impact of {Wood} {Moisture} {Content} on {Structural} {Integrity} of {Wood} {Under} {Dynamic} {Loads}},\n\tvolume = {72},\n\tdoi = {doi.org/10.5552/drvind.2023.0067},\n\tabstract = {The majority of mechanical wood properties are negatively affected by wood moisture within the hygroscopic range, disregarding the stress relaxation of wood at very low moisture contents (MC). In contrast, the structural integrity and thus the brittleness of wood appears to be positively affected by moisture. This study aimed at examining the effect of wood MC on the structural integrity of wood between the oven-dry state and MC well above cell wall saturation (CWS), i.e., at approx. 100 \\%. For both softwood (Picea abies) and hardwoods (Fagus sylvatica and Quercus robur), the structural integrity was assessed on the basis of the Resistance to Impact Milling (RIM) originating from High-Energy Multiple Impact (HEMI) tests. RIM increased with increasing MC in the hygroscopic range, which might be explained by stress relaxation and ‘gluing effects’ inside the cell wall polymer structure, resulting from a growing network of hydrogen bonds on cell wall level. Increasing MC above CWS caused a slight decrease of RIM in the selected hardwood species, whereas no significant change in RIM was observed when MC varied in the range from CWS to approx. 100 \\% for the softwood species Norway spruce.},\n\tlanguage = {en},\n\tnumber = {4},\n\tauthor = {Emmerich, Lukas and Brischke, Christian},\n\tyear = {2023},\n\tpages = {243--250},\n\tfile = {Emmerich und Brischke - 2023 - Impact of Wood Moisture Content on Structural Inte.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\NQB5435N\\\\Emmerich und Brischke - 2023 - Impact of Wood Moisture Content on Structural Inte.pdf:application/pdf},\n}\n\n
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\n The majority of mechanical wood properties are negatively affected by wood moisture within the hygroscopic range, disregarding the stress relaxation of wood at very low moisture contents (MC). In contrast, the structural integrity and thus the brittleness of wood appears to be positively affected by moisture. This study aimed at examining the effect of wood MC on the structural integrity of wood between the oven-dry state and MC well above cell wall saturation (CWS), i.e., at approx. 100 %. For both softwood (Picea abies) and hardwoods (Fagus sylvatica and Quercus robur), the structural integrity was assessed on the basis of the Resistance to Impact Milling (RIM) originating from High-Energy Multiple Impact (HEMI) tests. RIM increased with increasing MC in the hygroscopic range, which might be explained by stress relaxation and ‘gluing effects’ inside the cell wall polymer structure, resulting from a growing network of hydrogen bonds on cell wall level. Increasing MC above CWS caused a slight decrease of RIM in the selected hardwood species, whereas no significant change in RIM was observed when MC varied in the range from CWS to approx. 100 % for the softwood species Norway spruce.\n
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\n \n\n \n \n \n \n \n Performance of exterior wood coatings on chemically and thermally modified wood during natural weathering – Results from 5.5 years outdoor exposure.\n \n \n \n\n\n \n Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In 28 May – 1 June, 2023, June 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{emmerich_performance_2023,\n\ttitle = {Performance of exterior wood coatings on chemically and thermally modified wood during natural weathering – {Results} from 5.5 years outdoor exposure},\n\tabstract = {Non-durable softwood and hardwood species were treated with the water-soluble cyclic Nmethylol compounds 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU. One half of the modified specimens were coated with a waterborne acrylic coating system prior a natural weathering for 5.5 years according to EN 927-3 (2020). By frequent evaluations, the impact of chemical modifications and combined thermo-chemical modifications on the moisture dynamics and crack sensitivity of solid wood boards was assessed, further the aspect how such modifications impact on the paint adhesion and performance of a waterborne coating system.},\n\tlanguage = {en},\n\tbooktitle = {28 {May} – 1 {June}, 2023},\n\tauthor = {Emmerich, Lukas and Militz, Holger},\n\tmonth = jun,\n\tyear = {2023},\n\tfile = {Emmerich und Militz - Performance of exterior wood coatings on chemicall.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\JUC5W6FS\\\\Emmerich und Militz - Performance of exterior wood coatings on chemicall.pdf:application/pdf},\n}\n\n
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\n Non-durable softwood and hardwood species were treated with the water-soluble cyclic Nmethylol compounds 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU. One half of the modified specimens were coated with a waterborne acrylic coating system prior a natural weathering for 5.5 years according to EN 927-3 (2020). By frequent evaluations, the impact of chemical modifications and combined thermo-chemical modifications on the moisture dynamics and crack sensitivity of solid wood boards was assessed, further the aspect how such modifications impact on the paint adhesion and performance of a waterborne coating system.\n
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\n \n\n \n \n \n \n \n Field durability testing of wood above ground - Part 2: The full guideline of the Bundle method.\n \n \n \n\n\n \n Brischke, C.; Alfredsen, G.; Emmerich, L.; Humar, M.; and Meyer-Veltrup, L.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 19, Cairns, Australia, June 2023. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{brischke_field_2023,\n\taddress = {Cairns, Australia},\n\ttitle = {Field durability testing of wood above ground - {Part} 2: {The} full guideline of the {Bundle} method},\n\tdoi = {IRG/WP 23-20696},\n\tabstract = {To determine the biological durability of wood above ground, numerous approaches for test methods have been pursued and tried out in the field in the past. So far, no method has managed to find its way into a European standard. During the last 15 years, experience with the Bundle method has been gained. As described in Part 1 of this paper, the method is recommended as a suitable tool for determining the durability of various wood-based materials including modified and preservative treated wood. A full guideline of the Bundle method is presented in this paper.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Brischke, Christian and Alfredsen, Gry and Emmerich, Lukas and Humar, Miha and Meyer-Veltrup, Linda},\n\tmonth = jun,\n\tyear = {2023},\n\tpages = {19},\n\tfile = {Brischke et al. - Field durability testing of wood above ground - Pa.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\B8NE3VBI\\\\Brischke et al. - Field durability testing of wood above ground - Pa.pdf:application/pdf},\n}\n\n
\n
\n\n\n
\n To determine the biological durability of wood above ground, numerous approaches for test methods have been pursued and tried out in the field in the past. So far, no method has managed to find its way into a European standard. During the last 15 years, experience with the Bundle method has been gained. As described in Part 1 of this paper, the method is recommended as a suitable tool for determining the durability of various wood-based materials including modified and preservative treated wood. A full guideline of the Bundle method is presented in this paper.\n
\n\n\n
\n\n\n
\n \n\n \n \n \n \n \n Field durability testing of wood above ground - Part 1: 15 years’ experience with the Bundle method.\n \n \n \n\n\n \n Brischke, C.; Alfredsen, G.; Emmerich, L.; Humar, M.; and Meyer-Veltrup, L.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 13, Cairns, Australia, June 2023. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{brischke_field_2023-1,\n\taddress = {Cairns, Australia},\n\ttitle = {Field durability testing of wood above ground - {Part} 1: 15 years’ experience with the {Bundle} method},\n\tdoi = {IRG/WP 23-20695},\n\tabstract = {A ‘jack of all trades’ method for above-ground wood durability testing has been sought for decades, but until now no method has found its way into standardization. The method of choice shall be applicable for untreated and treated wood – ideally also for wood composites. It shall be reproducible, objective, fast, easy, and inexpensive. Finally, it shall provide high predictive power. This study aimed at a review of results and practical experience with the Bundle-test method which could serve as a standardisable procedure for above-ground field tests of wood-based materials. The method allows for water-trapping, creates a moderate moisture-induced decay risk, and is applicable for a wide range of materials. Based on Bundle-tests with different modifications and performed at different locations, a guideline has been developed which will be presented in Part 2 of this paper.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Brischke, Christian and Alfredsen, Gry and Emmerich, Lukas and Humar, Miha and Meyer-Veltrup, Linda},\n\tmonth = jun,\n\tyear = {2023},\n\tpages = {13},\n\tfile = {Brischke et al. - Field durability testing of wood above ground - Pa.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\QYMLQUGG\\\\Brischke et al. - Field durability testing of wood above ground - Pa.pdf:application/pdf},\n}\n\n
\n
\n\n\n
\n A ‘jack of all trades’ method for above-ground wood durability testing has been sought for decades, but until now no method has found its way into standardization. The method of choice shall be applicable for untreated and treated wood – ideally also for wood composites. It shall be reproducible, objective, fast, easy, and inexpensive. Finally, it shall provide high predictive power. This study aimed at a review of results and practical experience with the Bundle-test method which could serve as a standardisable procedure for above-ground field tests of wood-based materials. The method allows for water-trapping, creates a moderate moisture-induced decay risk, and is applicable for a wide range of materials. Based on Bundle-tests with different modifications and performed at different locations, a guideline has been developed which will be presented in Part 2 of this paper.\n
\n\n\n
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\n \n\n \n \n \n \n \n Biological durability and wood-water interactions of sorbitol and citric acid modified wood – Effects on the expected service life.\n \n \n \n\n\n \n Kurkowiak, K.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 10, Cairns, Australia, June 2023. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{kurkowiak_biological_2023,\n\taddress = {Cairns, Australia},\n\ttitle = {Biological durability and wood-water interactions of sorbitol and citric acid modified wood – {Effects} on the expected service life},\n\tdoi = {IRG/WP 23-40960},\n\tabstract = {A high level of research activities on sorbitol and citric acid (SorCA) modified wood has been recognized in Europe over the last few years. As this treatment is close to entering an industrialscale production, it is of interest to investigate how such treated wood performs upon long-term outdoor exposure. Hence, in this study Scots pine (Pinus sylvestris L.) sapwood was modified with aqueous solutions of sorbitol and citric acid at various solid contents (10-50\\%). Afterwards, untreated and modified specimens were subjected to moisture uptake and release tests and the changes in wettability were registered. Overall, the water uptake of SorCA-treated specimens significantly decreased in comparison to untreated control specimens. Based on results from this and earlier studies testing the resistance of SorCA modified wood against wood-destroying basidiomycetes, the wettability (kwa) and inherent durability (kinh) factors were calculated and used to determine the resistance dose (DRd) of the materials under test. These values were then implemented in a dose-response model and used to predict the service life of SorCA-modified wood under real-life above ground conditions.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Kurkowiak, Katarzyna and Emmerich, Lukas and Militz, Holger},\n\tmonth = jun,\n\tyear = {2023},\n\tpages = {10},\n\tfile = {Kurkowiak et al. - Biological durability and wood-water interactions .pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\QKSDWD7I\\\\Kurkowiak et al. - Biological durability and wood-water interactions .pdf:application/pdf},\n}\n\n
\n
\n\n\n
\n A high level of research activities on sorbitol and citric acid (SorCA) modified wood has been recognized in Europe over the last few years. As this treatment is close to entering an industrialscale production, it is of interest to investigate how such treated wood performs upon long-term outdoor exposure. Hence, in this study Scots pine (Pinus sylvestris L.) sapwood was modified with aqueous solutions of sorbitol and citric acid at various solid contents (10-50%). Afterwards, untreated and modified specimens were subjected to moisture uptake and release tests and the changes in wettability were registered. Overall, the water uptake of SorCA-treated specimens significantly decreased in comparison to untreated control specimens. Based on results from this and earlier studies testing the resistance of SorCA modified wood against wood-destroying basidiomycetes, the wettability (kwa) and inherent durability (kinh) factors were calculated and used to determine the resistance dose (DRd) of the materials under test. These values were then implemented in a dose-response model and used to predict the service life of SorCA-modified wood under real-life above ground conditions.\n
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\n \n\n \n \n \n \n \n Performance of exterior wood coatings on chemically and thermally modified wood during natural weathering – Results from 5.5 years outdoor exposure.\n \n \n \n\n\n \n Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 18, Cairns, Australia, June 2023. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{emmerich_performance_2023-1,\n\taddress = {Cairns, Australia},\n\ttitle = {Performance of exterior wood coatings on chemically and thermally modified wood during natural weathering – {Results} from 5.5 years outdoor exposure},\n\tdoi = {IRG/WP 23-40964},\n\tabstract = {Non-durable softwood and hardwood species were treated with the water-soluble cyclic Nmethylol compounds 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU. One half of the modified specimens were coated with a waterborne acrylic coating system prior a natural weathering for 5.5 years according to EN 927-3 (2020). By frequent evaluations, the impact of chemical modifications and combined thermo-chemical modifications on the moisture dynamics and crack sensitivity of solid wood boards was assessed, further the aspect how such modifications impact on the paint adhesion and performance of a waterborne coating system.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Emmerich, Lukas and Militz, Holger},\n\tmonth = jun,\n\tyear = {2023},\n\tpages = {18},\n\tfile = {Emmerich und Militz - Performance of exterior wood coatings on chemicall.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\77V3WYFC\\\\Emmerich und Militz - Performance of exterior wood coatings on chemicall.pdf:application/pdf},\n}\n\n
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\n Non-durable softwood and hardwood species were treated with the water-soluble cyclic Nmethylol compounds 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU. One half of the modified specimens were coated with a waterborne acrylic coating system prior a natural weathering for 5.5 years according to EN 927-3 (2020). By frequent evaluations, the impact of chemical modifications and combined thermo-chemical modifications on the moisture dynamics and crack sensitivity of solid wood boards was assessed, further the aspect how such modifications impact on the paint adhesion and performance of a waterborne coating system.\n
\n\n\n
\n\n\n
\n \n\n \n \n \n \n \n Field durability testing of wood above ground - Part 2: The full guideline of the Bundle method.\n \n \n \n\n\n \n Brischke, C.; Alfredsen, G.; Emmerich, L.; Humar, M.; and Meyer-Veltrup, L.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 18, Cairns, Australia, June 2023. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{brischke_field_2023-2,\n\taddress = {Cairns, Australia},\n\ttitle = {Field durability testing of wood above ground - {Part} 2: {The} full guideline of the {Bundle} method},\n\tdoi = {IRG/WP 23-20696},\n\tlanguage = {En},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Brischke, C. and Alfredsen, G. and Emmerich, L. and Humar, M. and Meyer-Veltrup, L.},\n\tmonth = jun,\n\tyear = {2023},\n\tpages = {18},\n}\n\n
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\n \n\n \n \n \n \n \n Adhesion and performance of exterior wood coatings on chemically and thermally modified wood – Results from 5.5 years outdoor exposure.\n \n \n \n\n\n \n Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 18, Cairns, Australia, June 2023. \n \n\n\n\n
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@inproceedings{emmerich_adhesion_2023,\n\taddress = {Cairns, Australia},\n\ttitle = {Adhesion and performance of exterior wood coatings on chemically and thermally modified wood – {Results} from 5.5 years outdoor exposure},\n\tlanguage = {En},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Emmerich, L. and Militz, H.},\n\tmonth = jun,\n\tyear = {2023},\n\tpages = {18},\n}\n\n
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\n \n\n \n \n \n \n \n Field durability testing of wood above ground - Part 1: 15 years’ experience with the Bundle method.\n \n \n \n\n\n \n Brischke, C.; Alfredsen, G.; Emmerich, L.; Humar, M.; and Meyer-Veltrup, L.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 13, Cairns, Australia, June 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{brischke_field_2023-3,\n\taddress = {Cairns, Australia},\n\ttitle = {Field durability testing of wood above ground - {Part} 1: 15 years’ experience with the {Bundle} method},\n\tlanguage = {En},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Brischke, C. and Alfredsen, G. and Emmerich, L. and Humar, M. and Meyer-Veltrup, L.},\n\tmonth = jun,\n\tyear = {2023},\n\tpages = {13},\n}\n\n
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\n \n\n \n \n \n \n \n Study on biocide-free wood modification techniques and how they impact on the termite resistance of wood.\n \n \n \n\n\n \n Emmerich, L.; Darmawan, D.; Kurkowiak, K.; Biziks, V.; and Militz, H.\n\n\n \n\n\n\n In Proceedings IUFRO-DIV 5 Conference, Cairns, Australia, 2023. \n \n\n\n\n
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@inproceedings{emmerich_study_2023,\n\taddress = {Cairns, Australia},\n\ttitle = {Study on biocide-free wood modification techniques and how they impact on the termite resistance of wood},\n\tbooktitle = {Proceedings {IUFRO}-{DIV} 5 {Conference}},\n\tauthor = {Emmerich, L. and Darmawan, D. and Kurkowiak, K. and Biziks, V. and Militz, H.},\n\tyear = {2023},\n}\n\n
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\n \n\n \n \n \n \n \n \n Deborah number-dependent transition from homogeneity to heterogeneity.\n \n \n \n \n\n\n \n Dan, X.; Yang, Y.; Emmerich, L.; Wang, Y.; and Zhang, K.\n\n\n \n\n\n\n Technical Report In Review, February 2023.\n \n\n\n\n
\n\n\n\n \n \n \"DeborahPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 2 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@techreport{dan_deborah_2023,\n\ttype = {preprint},\n\ttitle = {Deborah number-dependent transition from homogeneity to heterogeneity},\n\turl = {https://www.researchsquare.com/article/rs-2565382/v1},\n\tabstract = {Abstract\n          \n            Heterogeneous structures are ubiquitous in natural organisms. Native heterogeneous structures inspire many artificial structures that are playing important roles in modern society, while it is challenging to identify the relevant factors in forming these structures due to the complexity of living systems. Here, hybrid hydrogels consisting of flexible polymer networks with embedded stiff cellulose nanocrystals (CNCs) are considered as an open system to simulate the generalized formation of heterogeneous core-sheath structures, which are formed as the dynamic response to external environment. As the result of environmental adaption during modified air drying processes of hybrid hydrogels, the formation of heterogeneous core-sheath structure was found to be correlated to the relative evaporation speed. The formation of such heterogeneity in xerogel fibers was found to be correlated with Deborah number (\n            De\n            ). During the transition of\n            De\n            from large to small values with accompanying morphologies, the turning point was around\n            De\n             = 1. The mechanism can be considered a relative humidity-dependent glass transition behavior. These unique heterogeneous structures play a key role in tuning water permeation and water sorption capacity. Insights into these aspects can prospectively contribute to a better understanding of the native heterogeneous structures for bionics design.},\n\tlanguage = {en},\n\turldate = {2023-05-08},\n\tinstitution = {In Review},\n\tauthor = {Dan, Xu and Yang, Yang and Emmerich, Lukas and Wang, Yong and Zhang, Kai},\n\tmonth = feb,\n\tyear = {2023},\n\tdoi = {10.21203/rs.3.rs-2565382/v1},\n\tfile = {Dan et al. - 2023 - Deborah number-dependent transition from homogenei.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\GEXXAPPT\\\\Dan et al. - 2023 - Deborah number-dependent transition from homogenei.pdf:application/pdf},\n}\n\n
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\n Abstract Heterogeneous structures are ubiquitous in natural organisms. Native heterogeneous structures inspire many artificial structures that are playing important roles in modern society, while it is challenging to identify the relevant factors in forming these structures due to the complexity of living systems. Here, hybrid hydrogels consisting of flexible polymer networks with embedded stiff cellulose nanocrystals (CNCs) are considered as an open system to simulate the generalized formation of heterogeneous core-sheath structures, which are formed as the dynamic response to external environment. As the result of environmental adaption during modified air drying processes of hybrid hydrogels, the formation of heterogeneous core-sheath structure was found to be correlated to the relative evaporation speed. The formation of such heterogeneity in xerogel fibers was found to be correlated with Deborah number ( De ). During the transition of De from large to small values with accompanying morphologies, the turning point was around De  = 1. The mechanism can be considered a relative humidity-dependent glass transition behavior. These unique heterogeneous structures play a key role in tuning water permeation and water sorption capacity. Insights into these aspects can prospectively contribute to a better understanding of the native heterogeneous structures for bionics design.\n
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\n \n\n \n \n \n \n \n \n Fire resistance of pine wood treated with phenol-formaldehyde resin and phosphate-based flame retardant.\n \n \n \n \n\n\n \n Wu, M.; Emmerich, L.; Kurkowiak, K.; and Militz, H.\n\n\n \n\n\n\n Wood Material Science & Engineering,1–7. May 2023.\n \n\n\n\n
\n\n\n\n \n \n \"FirePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{wu_fire_2023,\n\ttitle = {Fire resistance of pine wood treated with phenol-formaldehyde resin and phosphate-based flame retardant},\n\tissn = {1748-0272, 1748-0280},\n\turl = {https://www.tandfonline.com/doi/full/10.1080/17480272.2023.2205379},\n\tdoi = {10.1080/17480272.2023.2205379},\n\tlanguage = {en},\n\turldate = {2023-05-05},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Wu, Muting and Emmerich, Lukas and Kurkowiak, Katarzyna and Militz, Holger},\n\tmonth = may,\n\tyear = {2023},\n\tpages = {1--7},\n\tfile = {Wu et al. - 2023 - Fire resistance of pine wood treated with phenol-f.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\NJ6NHIB5\\\\Wu et al. - 2023 - Fire resistance of pine wood treated with phenol-f.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n \n Fire-retardant properties of wood modified with sorbitol, citric acid and a phosphorous-based system.\n \n \n \n \n\n\n \n Kurkowiak, K.; Wu, M.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Holzforschung, 77(1): 38–44. January 2023.\n Publisher: De Gruyter\n\n\n\n
\n\n\n\n \n \n \"Fire-retardantPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{kurkowiak_fire-retardant_2023,\n\ttitle = {Fire-retardant properties of wood modified with sorbitol, citric acid and a phosphorous-based system},\n\tvolume = {77},\n\tissn = {1437-434X},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2022-0114/html?lang=de},\n\tdoi = {10.1515/hf-2022-0114},\n\tabstract = {Scots pine sapwood ( Pinus sylvestris L.) was modified with an aqueous solution of sorbitol and citric acid (SorCA) and a commercial phosphorus-based fire-retardant (FR). The aim of this study was to assess whether the fire behavior can be improved when the SorCA solution is supplemented by an FR and if this effect is resistant to leaching. The fire behavior of modified wood was investigated by a Bunsen burner ignition test, mass loss calorimetry (MLC) and thermogravimetric analysis (TGA). The results demonstrated a significantly improved fire-retardancy based on a decreased burning rate and a reduced mass loss in the Bunsen burner test. Also, the induced formation of a protective char barrier facilitated by the addition of a FR, reduced the heat release rate and delayed the ignition. The fire-retardant effect was still observed, to the less extent, after a cold-water (EN 84 2020) leaching of the specimens.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2023-04-11},\n\tjournal = {Holzforschung},\n\tauthor = {Kurkowiak, Katarzyna and Wu, Muting and Emmerich, Lukas and Militz, Holger},\n\tmonth = jan,\n\tyear = {2023},\n\tnote = {Publisher: De Gruyter},\n\tkeywords = {wood modification, citric acid, fire behaviour, phosphorous compound, polyesterification, sorbitol},\n\tpages = {38--44},\n\tfile = {Kurkowiak et al. - 2022 - Fire-retardant properties of wood modified with so.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\FMPFSSIX\\\\Kurkowiak et al. - 2022 - Fire-retardant properties of wood modified with so.pdf:application/pdf},\n}\n\n
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\n Scots pine sapwood ( Pinus sylvestris L.) was modified with an aqueous solution of sorbitol and citric acid (SorCA) and a commercial phosphorus-based fire-retardant (FR). The aim of this study was to assess whether the fire behavior can be improved when the SorCA solution is supplemented by an FR and if this effect is resistant to leaching. The fire behavior of modified wood was investigated by a Bunsen burner ignition test, mass loss calorimetry (MLC) and thermogravimetric analysis (TGA). The results demonstrated a significantly improved fire-retardancy based on a decreased burning rate and a reduced mass loss in the Bunsen burner test. Also, the induced formation of a protective char barrier facilitated by the addition of a FR, reduced the heat release rate and delayed the ignition. The fire-retardant effect was still observed, to the less extent, after a cold-water (EN 84 2020) leaching of the specimens.\n
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\n \n\n \n \n \n \n \n \n Thermal and chemical modification of wood – a combined approach for exclusive, high-demanding performance products.\n \n \n \n \n\n\n \n Goli, G.; Negro, F.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Wood Material Science & Engineering, 18(1): 58–66. January 2023.\n Publisher: Taylor & Francis _eprint: https://doi.org/10.1080/17480272.2022.2143281\n\n\n\n
\n\n\n\n \n \n \"ThermalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{goli_thermal_2023,\n\ttitle = {Thermal and chemical modification of wood – a combined approach for exclusive, high-demanding performance products},\n\tvolume = {18},\n\tissn = {1748-0272},\n\turl = {https://doi.org/10.1080/17480272.2022.2143281},\n\tdoi = {10.1080/17480272.2022.2143281},\n\tabstract = {Chemical and thermo-chemical modification processes were applied to European beech wood to make it applicable for interior applications which place high demands on aesthetics, hygrothermal and water resistance performance. In particular, the use of modified wood in kitchen tools was foreseen. Impregnation modification with a 20\\% DMDHEU solution, thermal modification and a combined approach of thermo-chemical modification were compared. All modification processes caused a darkening that for the high modification intensities became close to the aesthetics of some of the most renowned tropical hardwood species. The higher the modification intensity, the higher the improvement. In particular, chemical and thermo-chemical modification processes significantly decreased the liquid water uptake. As regards the mechanical performances while stiffness and strength did not change abruptly and hardness increased, the resistance towards dynamic impacts significantly decreased with every kind of modification process. Thermo-chemical modifications resulted to be an interesting way to improve most of the physical properties of wood with outstanding behaviour in terms of colour appearance and reduction of water uptake in wet environments. An increased brittleness is the weakest point for foreseen fields of application.},\n\tnumber = {1},\n\turldate = {2023-03-23},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Goli, Giacomo and Negro, Federico and Emmerich, Lukas and Militz, Holger},\n\tmonth = jan,\n\tyear = {2023},\n\tnote = {Publisher: Taylor \\& Francis\n\\_eprint: https://doi.org/10.1080/17480272.2022.2143281},\n\tkeywords = {DMDHEU, Beech wood, high-demanding applications, thermo-chemical modification},\n\tpages = {58--66},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\VXAIT7XF\\\\Goli et al. - 2023 - Thermal and chemical modification of wood – a comb.pdf:application/pdf},\n}\n\n
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\n Chemical and thermo-chemical modification processes were applied to European beech wood to make it applicable for interior applications which place high demands on aesthetics, hygrothermal and water resistance performance. In particular, the use of modified wood in kitchen tools was foreseen. Impregnation modification with a 20% DMDHEU solution, thermal modification and a combined approach of thermo-chemical modification were compared. All modification processes caused a darkening that for the high modification intensities became close to the aesthetics of some of the most renowned tropical hardwood species. The higher the modification intensity, the higher the improvement. In particular, chemical and thermo-chemical modification processes significantly decreased the liquid water uptake. As regards the mechanical performances while stiffness and strength did not change abruptly and hardness increased, the resistance towards dynamic impacts significantly decreased with every kind of modification process. Thermo-chemical modifications resulted to be an interesting way to improve most of the physical properties of wood with outstanding behaviour in terms of colour appearance and reduction of water uptake in wet environments. An increased brittleness is the weakest point for foreseen fields of application.\n
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\n \n\n \n \n \n \n \n Durability of Wood Exposed above Ground—Experience with the Bundle Test Method.\n \n \n \n\n\n \n Brischke, C.; Alfredsen, G.; Emmerich, L.; Humar, M.; and Meyer-Veltrup, L.\n\n\n \n\n\n\n , 14(7): 1460. 2023.\n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{brischke_durability_2023,\n\ttitle = {Durability of {Wood} {Exposed} above {Ground}—{Experience} with the {Bundle} {Test} {Method}},\n\tvolume = {14},\n\tdoi = {doi.org/10.3390/f14071460},\n\tabstract = {The durability against decay organisms is an essential material property for wood in outdoor use. A jack of all trades method for above-ground wood durability testing has been sought for decades, but until now no method has found its way into European standardization. The method of choice shall be applicable for untreated and treated wood—ideally also for wood composites. It shall further be reproducible, objective, fast, easy, and inexpensive. Finally, it shall provide high predictive power. This study was aimed at a review of results and practical experience with the Bundle test method which could serve as a standard procedure for above-ground field tests of woodbased materials. The method allows for water-trapping, creates a moderate moisture-induced decay risk typical for UC 3 situations, and was found applicable for a wide range of wood materials. The method allows for rapid infestation and failure of non-durable reference species within five years in Central Europe. Based on results from Bundle tests with different modifications and performed at different locations, a guideline has been developed. The method is recommended as a suitable tool for determining the durability of various wood-based materials including modified and preservativetreated wood and can provide data for durability classification.},\n\tlanguage = {en},\n\tnumber = {7},\n\tauthor = {Brischke, Christian and Alfredsen, Gry and Emmerich, Lukas and Humar, Miha and Meyer-Veltrup, Linda},\n\tyear = {2023},\n\tpages = {1460},\n\tfile = {Brischke et al. - 2023 - Durability of Wood Exposed above Ground—Experience.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\LWZG9BUD\\\\Brischke et al. - 2023 - Durability of Wood Exposed above Ground—Experience.pdf:application/pdf},\n}\n
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\n The durability against decay organisms is an essential material property for wood in outdoor use. A jack of all trades method for above-ground wood durability testing has been sought for decades, but until now no method has found its way into European standardization. The method of choice shall be applicable for untreated and treated wood—ideally also for wood composites. It shall further be reproducible, objective, fast, easy, and inexpensive. Finally, it shall provide high predictive power. This study was aimed at a review of results and practical experience with the Bundle test method which could serve as a standard procedure for above-ground field tests of woodbased materials. The method allows for water-trapping, creates a moderate moisture-induced decay risk typical for UC 3 situations, and was found applicable for a wide range of wood materials. The method allows for rapid infestation and failure of non-durable reference species within five years in Central Europe. Based on results from Bundle tests with different modifications and performed at different locations, a guideline has been developed. The method is recommended as a suitable tool for determining the durability of various wood-based materials including modified and preservativetreated wood and can provide data for durability classification.\n
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\n  \n 2022\n \n \n (14)\n \n \n
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\n \n\n \n \n \n \n \n A novel wood preservation technology improving durability and water-related properties.\n \n \n \n\n\n \n Emmerich, L.; Militz, H.; and Vila, M\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 15, Bled, Slovenia, May 2022. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{emmerich_novel_2022,\n\taddress = {Bled, Slovenia},\n\ttitle = {A novel wood preservation technology improving durability and water-related properties},\n\tdoi = {IRG/WP 22-40926},\n\tlanguage = {En},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Emmerich, L. and Militz, H. and Vila, M},\n\tmonth = may,\n\tyear = {2022},\n\tpages = {15},\n\tfile = {Emmerich et al. - 2022 - A novel wood preservation technology improving dur.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\6N63SNGK\\\\Emmerich et al. - 2022 - A novel wood preservation technology improving dur.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n \n Review of Wood Modification and Wood Functionalization Technologies.\n \n \n \n \n\n\n \n Zelinka, S. L.; Altgen, M.; Emmerich, L.; Guigo, N.; Keplinger, T.; Kymäläinen, M.; Thybring, E. E.; and Thygesen, L. G.\n\n\n \n\n\n\n Forests, 13(7): 1004. June 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ReviewPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{zelinka_review_2022,\n\ttitle = {Review of {Wood} {Modification} and {Wood} {Functionalization} {Technologies}},\n\tvolume = {13},\n\tissn = {1999-4907},\n\turl = {https://www.mdpi.com/1999-4907/13/7/1004},\n\tdoi = {10.3390/f13071004},\n\tabstract = {Wood modifications are becoming popular as a way to enhance the performance of wood, either to make it more durable, improve the performance of wood, or give it new functionality as a multifunctional or smart material. While wood modifications have been examined since the early 1900s, the topic has become a dominant area of study in wood science over the past decade. This review summarizes recent advances and provides future perspective on a selection of wood modifications, i.e., the methods that are currently commercialized (acetylation, furfurylation, and thermal modification), a rediscovered ancient practice (charring), a family of polymerization modifications that have so far made it to the pilot scale, and examples of novel wood-based functional materials explored at laboratory scale.},\n\tlanguage = {en},\n\tnumber = {7},\n\turldate = {2022-06-29},\n\tjournal = {Forests},\n\tauthor = {Zelinka, Samuel L. and Altgen, Michael and Emmerich, Lukas and Guigo, Nathanael and Keplinger, Tobias and Kymäläinen, Maija and Thybring, Emil E. and Thygesen, Lisbeth G.},\n\tmonth = jun,\n\tyear = {2022},\n\tpages = {1004},\n\tfile = {Zelinka et al. - 2022 - Review of Wood Modification and Wood Functionaliza.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\WZHCUAI7\\\\Zelinka et al. - 2022 - Review of Wood Modification and Wood Functionaliza.pdf:application/pdf},\n}\n\n
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\n Wood modifications are becoming popular as a way to enhance the performance of wood, either to make it more durable, improve the performance of wood, or give it new functionality as a multifunctional or smart material. While wood modifications have been examined since the early 1900s, the topic has become a dominant area of study in wood science over the past decade. This review summarizes recent advances and provides future perspective on a selection of wood modifications, i.e., the methods that are currently commercialized (acetylation, furfurylation, and thermal modification), a rediscovered ancient practice (charring), a family of polymerization modifications that have so far made it to the pilot scale, and examples of novel wood-based functional materials explored at laboratory scale.\n
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\n \n\n \n \n \n \n \n Growth Behaviour and Wood Degradation of Wood-Destroying Fungi in Chemically Modified Wood.\n \n \n \n\n\n \n Emmerich, L.; Bleckmann, M.; Strohbusch, S.; Brischke, C.; Bollmus, S.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of 10th European Conference on Wood Modification, pages 249–256, Nancy, France, April 2022. University of Lorraine\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{emmerich_growth_2022,\n\taddress = {Nancy, France},\n\ttitle = {Growth {Behaviour} and {Wood} {Degradation} of {Wood}-{Destroying} {Fungi} in {Chemically} {Modified} {Wood}},\n\tisbn = {978-2-37111-000-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of 10th {European} {Conference} on {Wood} {Modification}},\n\tpublisher = {University of Lorraine},\n\tauthor = {Emmerich, L. and Bleckmann, M. and Strohbusch, S. and Brischke, C. and Bollmus, S. and Militz, H.},\n\tmonth = apr,\n\tyear = {2022},\n\tpages = {249--256},\n}\n\n
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\n \n\n \n \n \n \n \n Performance of Resin-Treated Solid Wood and Laminated Veneer Lumber (LVL) Under Marine Conditions. 10th European Conference on Wood Modification.\n \n \n \n\n\n \n Emmerich, L.; Brischke, C.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of 10th European Conference on Wood Modification, pages 284–291, Nancy, France, April 2022. University of Lorraine\n \n\n\n\n
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@inproceedings{emmerich_performance_2022,\n\taddress = {Nancy, France},\n\ttitle = {Performance of {Resin}-{Treated} {Solid} {Wood} and {Laminated} {Veneer} {Lumber} ({LVL}) {Under} {Marine} {Conditions}. 10th {European} {Conference} on {Wood} {Modification}},\n\tisbn = {978-2-37111-000-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of 10th {European} {Conference} on {Wood} {Modification}},\n\tpublisher = {University of Lorraine},\n\tauthor = {Emmerich, L. and Brischke, C. and Militz, H.},\n\tmonth = apr,\n\tyear = {2022},\n\tpages = {284--291},\n}\n\n
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\n \n\n \n \n \n \n \n Thermal and Chemical Wood Modification - A combined Approach for Exclusive, High Demanding Performance Products.\n \n \n \n\n\n \n Goli, G.; Negro, F.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of 10th European Conference on Wood Modification, pages 386–392, Nancy, France, April 2022. University of Lorraine\n \n\n\n\n
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@inproceedings{goli_thermal_2022,\n\taddress = {Nancy, France},\n\ttitle = {Thermal and {Chemical} {Wood} {Modification} - {A} combined {Approach} for {Exclusive}, {High} {Demanding} {Performance} {Products}},\n\tisbn = {978-2-37111-000-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of 10th {European} {Conference} on {Wood} {Modification}},\n\tpublisher = {University of Lorraine},\n\tauthor = {Goli, G. and Negro, F. and Emmerich, L. and Militz, H.},\n\tmonth = apr,\n\tyear = {2022},\n\tpages = {386--392},\n}\n\n
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\n \n\n \n \n \n \n \n Wood Modification with Citric Acid and Sorbitol – A Review and Future Perspectives.\n \n \n \n\n\n \n Kurkowiak, K.; Emmerich, L.; Simmering, C.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of 10th European Conference on Wood Modification, pages 32–38, Nancy, France, April 2022. University of Lorraine\n \n\n\n\n
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@inproceedings{kurkowiak_wood_2022,\n\taddress = {Nancy, France},\n\ttitle = {Wood {Modification} with {Citric} {Acid} and {Sorbitol} – {A} {Review} and {Future} {Perspectives}},\n\tisbn = {978-2-37111-000-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of 10th {European} {Conference} on {Wood} {Modification}},\n\tpublisher = {University of Lorraine},\n\tauthor = {Kurkowiak, K. and Emmerich, L. and Simmering, C. and Militz, H.},\n\tmonth = apr,\n\tyear = {2022},\n\tpages = {32--38},\n}\n\n
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\n \n\n \n \n \n \n \n \n Properties of Mexican bloodwood (Haematoxylum campechianum L.). Part 1: anatomical and colourimetric characteristics.\n \n \n \n \n\n\n \n Koddenberg, T.; Brischke, C.; Emmerich, L.; and Kick, A. B. E.\n\n\n \n\n\n\n Holzforschung, 76(4): 330–338. April 2022.\n Publisher: De Gruyter\n\n\n\n
\n\n\n\n \n \n \"PropertiesPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{koddenberg_properties_2022,\n\ttitle = {Properties of {Mexican} bloodwood ({Haematoxylum} campechianum {L}.). {Part} 1: anatomical and colourimetric characteristics},\n\tvolume = {76},\n\tissn = {1437-434X},\n\tshorttitle = {Properties of {Mexican} bloodwood ({Haematoxylum} campechianum {L}.). {Part} 1},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2021-0186/html},\n\tdoi = {10.1515/hf-2021-0186},\n\tabstract = {Bloodwood ( Haematoxylum campechianum L.) native to Central America has been known as dye source since the prehistoric times by the Maya. Nowadays, bloodwood is increasingly used for plantations but its use for furniture, flooring, or fencing is only of regional importance. The reason is seen in lacking knowledge of its properties. To expand that knowledge, this Part 1 of the two-part study series investigated the anatomy and the discolouration due to leaching of heartwood of H. campechianum . Anatomical characteristics were described qualitatively and quantitively using scanning electron microscopy and X-ray micro-computed tomography. Detailed wood anatomical data are presented, together with numerical analyses of cell parameters. Apart from wood anatomy, colourimetric analyses were obtained after 10 leaching cycles. The colour change of the wood due to water exposure was determined measuring in CIE L * a * b * colour system. In addition, the extinction of the leachate was determined spectrophotometrically after each leaching cycle. The resulting colour change was evaluated according to colour change after each cycle. The most prominent change in colour was observed for the first cycle due to leaching. Because of the extensive leaching of extractives, further investigation might address the effect of leaching of water-soluble extractives on adhesion properties of bloodwood.},\n\tlanguage = {en},\n\tnumber = {4},\n\turldate = {2022-05-03},\n\tjournal = {Holzforschung},\n\tauthor = {Koddenberg, Tim and Brischke, Christian and Emmerich, Lukas and Kick, Annika B. E.},\n\tmonth = apr,\n\tyear = {2022},\n\tnote = {Publisher: De Gruyter},\n\tkeywords = {leaching, anatomy, microscopy, colourimetry, dyewood},\n\tpages = {330--338},\n\tfile = {Koddenberg et al. - 2022 - Properties of Mexican bloodwood (Haematoxylum camp.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\Q5C65HWB\\\\Koddenberg et al. - 2022 - Properties of Mexican bloodwood (Haematoxylum camp.pdf:application/pdf},\n}\n\n
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\n Bloodwood ( Haematoxylum campechianum L.) native to Central America has been known as dye source since the prehistoric times by the Maya. Nowadays, bloodwood is increasingly used for plantations but its use for furniture, flooring, or fencing is only of regional importance. The reason is seen in lacking knowledge of its properties. To expand that knowledge, this Part 1 of the two-part study series investigated the anatomy and the discolouration due to leaching of heartwood of H. campechianum . Anatomical characteristics were described qualitatively and quantitively using scanning electron microscopy and X-ray micro-computed tomography. Detailed wood anatomical data are presented, together with numerical analyses of cell parameters. Apart from wood anatomy, colourimetric analyses were obtained after 10 leaching cycles. The colour change of the wood due to water exposure was determined measuring in CIE L * a * b * colour system. In addition, the extinction of the leachate was determined spectrophotometrically after each leaching cycle. The resulting colour change was evaluated according to colour change after each cycle. The most prominent change in colour was observed for the first cycle due to leaching. Because of the extensive leaching of extractives, further investigation might address the effect of leaching of water-soluble extractives on adhesion properties of bloodwood.\n
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\n \n\n \n \n \n \n \n \n Properties of Mexican bloodwood (Haematoxylum campechianum L.). Part 2: moisture performance and biological durability.\n \n \n \n \n\n\n \n Brischke, C.; Emmerich, L.; Koddenberg, T.; and Kick, A. E. B.\n\n\n \n\n\n\n Holzforschung, 76(4): 339–347. April 2022.\n Publisher: De Gruyter\n\n\n\n
\n\n\n\n \n \n \"PropertiesPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{brischke_properties_2022,\n\ttitle = {Properties of {Mexican} bloodwood ({Haematoxylum} campechianum {L}.). {Part} 2: moisture performance and biological durability},\n\tvolume = {76},\n\tissn = {1437-434X},\n\tshorttitle = {Properties of {Mexican} bloodwood ({Haematoxylum} campechianum {L}.). {Part} 2},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2021-0187/html},\n\tdoi = {10.1515/hf-2021-0187},\n\tabstract = {Haematoxylum campechianum is most prevalently used as dyewood; its use for furniture, flooring, or fencing is only of regional importance, which might be due to lacking data about its technological properties. Therefore, small specimens were cut from H. campechianum stems from plantations in the lowlands of the Usumacinta delta in Mexico. The latter were subjected to laboratory decay and moisture studies. Water vapour sorption, liquid water uptake, and swelling of H. campechianum appeared much lower in comparison with most European grown wood species and similar to tropical hardwoods such as Tectona grandis . After removal of water-soluble ingredients, water vapour sorption of H. campechianum specimens further decreased, which assigned such ingredients a somewhat hydrophilic character. Mean mass losses (ML) due to decay by white, brown, and soft rot fungi in laboratory tests were \\&lt;5\\%. On the basis of a dose-response model, wetting ability factors and ML values from decay tests predicted an outdoor performance similar to T. grandis and Intsia bijuga . Based on this preliminary property profile, H. campechianum can be recommended for both outdoor (e.g. fencing, outdoor decking, railing) and indoor applications (e.g. flooring, manufacturing of furniture, wall and ceiling panels, decoration artwork).},\n\tlanguage = {en},\n\tnumber = {4},\n\turldate = {2022-05-03},\n\tjournal = {Holzforschung},\n\tauthor = {Brischke, Christian and Emmerich, Lukas and Koddenberg, Tim and Kick, Annika E. B.},\n\tmonth = apr,\n\tyear = {2022},\n\tnote = {Publisher: De Gruyter},\n\tkeywords = {durability class, sorption isotherm, moisture performance, dyewood, logwood},\n\tpages = {339--347},\n\tfile = {Brischke et al. - 2022 - Properties of Mexican bloodwood ( Haematoxylum .pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\A6NLMU7Z\\\\Brischke et al. - 2022 - Properties of Mexican bloodwood ( Haematoxylum .pdf:application/pdf},\n}\n\n
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\n Haematoxylum campechianum is most prevalently used as dyewood; its use for furniture, flooring, or fencing is only of regional importance, which might be due to lacking data about its technological properties. Therefore, small specimens were cut from H. campechianum stems from plantations in the lowlands of the Usumacinta delta in Mexico. The latter were subjected to laboratory decay and moisture studies. Water vapour sorption, liquid water uptake, and swelling of H. campechianum appeared much lower in comparison with most European grown wood species and similar to tropical hardwoods such as Tectona grandis . After removal of water-soluble ingredients, water vapour sorption of H. campechianum specimens further decreased, which assigned such ingredients a somewhat hydrophilic character. Mean mass losses (ML) due to decay by white, brown, and soft rot fungi in laboratory tests were <5%. On the basis of a dose-response model, wetting ability factors and ML values from decay tests predicted an outdoor performance similar to T. grandis and Intsia bijuga . Based on this preliminary property profile, H. campechianum can be recommended for both outdoor (e.g. fencing, outdoor decking, railing) and indoor applications (e.g. flooring, manufacturing of furniture, wall and ceiling panels, decoration artwork).\n
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\n \n\n \n \n \n \n \n \n Investigations of the Chemical Distribution in Sorbitol and Citric Acid (SorCA) Treated Wood—Development of a Quality Control Method on the Basis of Electromagnetic Radiation.\n \n \n \n \n\n\n \n Kurkowiak, K.; Mayer, A. K.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Forests, 13(2): 151. February 2022.\n Number: 2 Publisher: Multidisciplinary Digital Publishing Institute\n\n\n\n
\n\n\n\n \n \n \"InvestigationsPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 3 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{kurkowiak_investigations_2022,\n\ttitle = {Investigations of the {Chemical} {Distribution} in {Sorbitol} and {Citric} {Acid} ({SorCA}) {Treated} {Wood}\\&mdash;{Development} of a {Quality} {Control} {Method} on the {Basis} of {Electromagnetic} {Radiation}},\n\tvolume = {13},\n\tcopyright = {http://creativecommons.org/licenses/by/3.0/},\n\turl = {https://www.mdpi.com/1999-4907/13/2/151},\n\tdoi = {10.3390/f13020151},\n\tabstract = {Recent studies showed treatments with sorbitol and citric acid (SorCA) to significantly improve the dimensional stability and biological durability of wood. The industrialization of this process requires a quality control (QC) method to determine if the fixated chemicals are homogenously distributed within the piece of wood, which is essential for uniform material performance. Therefore, the objective of this work was to evaluate the use of common electromagnetic radiation-based methods to determine the degree of modification in SorCA-treated wood. Both Fourier transform infrared (FTIR) spectroscopy and near-infrared (NIR) spectroscopy have been used to create rough calibrations for the weight percent gain (WPG) prediction models. The FTIR measurements resulted in a high linear correlation between the band area ratio (BAR) and the WPG (R2 = 0.93). Additionally, a partial least square (PLS) regression of NIR spectroscopic data resulted in a model with a high prediction power (R2 = 0.83). Furthermore, X-ray density profiling emerged as a simple alternative for the QC by showing a gradient of modification chemicals inside the sample and differences in chemical uptake between earlywood and latewood. Overall, it can be concluded that the results from FTIR, NIR and X-ray densitometry can serve as indicators of impregnation chemical distribution in SorCA-modified wood.},\n\tlanguage = {en},\n\tnumber = {2},\n\turldate = {2022-01-20},\n\tjournal = {Forests},\n\tauthor = {Kurkowiak, Katarzyna and Mayer, Aaron K. and Emmerich, Lukas and Militz, Holger},\n\tmonth = feb,\n\tyear = {2022},\n\tnote = {Number: 2\nPublisher: Multidisciplinary Digital Publishing Institute},\n\tkeywords = {wood modification, citric acid, sorbitol, fourier transform infrared (FTIR) spectroscopy, near-infrared (NIR) spectroscopy, quality control (QC), X-ray density profiling},\n\tpages = {151},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\DMNTP78G\\\\Kurkowiak et al. - 2022 - Investigations of the Chemical Distribution in Sor.pdf:application/pdf},\n}\n\n
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\n Recent studies showed treatments with sorbitol and citric acid (SorCA) to significantly improve the dimensional stability and biological durability of wood. The industrialization of this process requires a quality control (QC) method to determine if the fixated chemicals are homogenously distributed within the piece of wood, which is essential for uniform material performance. Therefore, the objective of this work was to evaluate the use of common electromagnetic radiation-based methods to determine the degree of modification in SorCA-treated wood. Both Fourier transform infrared (FTIR) spectroscopy and near-infrared (NIR) spectroscopy have been used to create rough calibrations for the weight percent gain (WPG) prediction models. The FTIR measurements resulted in a high linear correlation between the band area ratio (BAR) and the WPG (R2 = 0.93). Additionally, a partial least square (PLS) regression of NIR spectroscopic data resulted in a model with a high prediction power (R2 = 0.83). Furthermore, X-ray density profiling emerged as a simple alternative for the QC by showing a gradient of modification chemicals inside the sample and differences in chemical uptake between earlywood and latewood. Overall, it can be concluded that the results from FTIR, NIR and X-ray densitometry can serve as indicators of impregnation chemical distribution in SorCA-modified wood.\n
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\n \n\n \n \n \n \n \n Investigations of the Chemical Distribution in Sorbitol and Citric Acid (SorCA) Treated Wood—Development of a Quality Control Method on the Basis of Electromagnetic Radiation.\n \n \n \n\n\n \n Kurkowiak, K.; Mayer, A. K; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n ,15. 2022.\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{kurkowiak_investigations_2022-1,\n\ttitle = {Investigations of the {Chemical} {Distribution} in {Sorbitol} and {Citric} {Acid} ({SorCA}) {Treated} {Wood}—{Development} of a {Quality} {Control} {Method} on the {Basis} of {Electromagnetic} {Radiation}},\n\tabstract = {Recent studies showed treatments with sorbitol and citric acid (SorCA) to significantly improve the dimensional stability and biological durability of wood. The industrialization of this process requires a quality control (QC) method to determine if the fixated chemicals are homogenously distributed within the piece of wood, which is essential for uniform material performance. Therefore, the objective of this work was to evaluate the use of common electromagnetic radiation-based methods to determine the degree of modification in SorCA-treated wood. Both Fourier transform infrared (FTIR) spectroscopy and near-infrared (NIR) spectroscopy have been used to create rough calibrations for the weight percent gain (WPG) prediction models. The FTIR measurements resulted in a high linear correlation between the band area ratio (BAR) and the WPG (R2 = 0.93). Additionally, a partial least square (PLS) regression of NIR spectroscopic data resulted in a model with a high prediction power (R2 = 0.83). Furthermore, X-ray density profiling emerged as a simple alternative for the QC by showing a gradient of modification chemicals inside the sample and differences in chemical uptake between earlywood and latewood. Overall, it can be concluded that the results from FTIR, NIR and X-ray densitometry can serve as indicators of impregnation chemical distribution in SorCA-modified wood.},\n\tlanguage = {en},\n\tauthor = {Kurkowiak, Katarzyna and Mayer, Aaron K and Emmerich, Lukas and Militz, Holger},\n\tyear = {2022},\n\tpages = {15},\n\tfile = {Kurkowiak et al. - 2022 - Investigations of the Chemical Distribution in Sor.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\UUZLRJCJ\\\\Kurkowiak et al. - 2022 - Investigations of the Chemical Distribution in Sor.pdf:application/pdf},\n}\n\n
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\n Recent studies showed treatments with sorbitol and citric acid (SorCA) to significantly improve the dimensional stability and biological durability of wood. The industrialization of this process requires a quality control (QC) method to determine if the fixated chemicals are homogenously distributed within the piece of wood, which is essential for uniform material performance. Therefore, the objective of this work was to evaluate the use of common electromagnetic radiation-based methods to determine the degree of modification in SorCA-treated wood. Both Fourier transform infrared (FTIR) spectroscopy and near-infrared (NIR) spectroscopy have been used to create rough calibrations for the weight percent gain (WPG) prediction models. The FTIR measurements resulted in a high linear correlation between the band area ratio (BAR) and the WPG (R2 = 0.93). Additionally, a partial least square (PLS) regression of NIR spectroscopic data resulted in a model with a high prediction power (R2 = 0.83). Furthermore, X-ray density profiling emerged as a simple alternative for the QC by showing a gradient of modification chemicals inside the sample and differences in chemical uptake between earlywood and latewood. Overall, it can be concluded that the results from FTIR, NIR and X-ray densitometry can serve as indicators of impregnation chemical distribution in SorCA-modified wood.\n
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\n \n\n \n \n \n \n \n \n Thermal and chemical modification of wood – a combined approach for exclusive, high-demanding performance products.\n \n \n \n \n\n\n \n Goli, G.; Negro, F.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Wood Material Science & Engineering, 0(0): 1–9. November 2022.\n Publisher: Taylor & Francis _eprint: https://doi.org/10.1080/17480272.2022.2143281\n\n\n\n
\n\n\n\n \n \n \"ThermalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{goli_thermal_2022-1,\n\ttitle = {Thermal and chemical modification of wood – a combined approach for exclusive, high-demanding performance products},\n\tvolume = {0},\n\tissn = {1748-0272},\n\turl = {https://doi.org/10.1080/17480272.2022.2143281},\n\tdoi = {10.1080/17480272.2022.2143281},\n\tabstract = {Chemical and thermo-chemical modification processes were applied to European beech wood to make it applicable for interior applications which place high demands on aesthetics, hygrothermal and water resistance performance. In particular, the use of modified wood in kitchen tools was foreseen. Impregnation modification with a 20\\% DMDHEU solution, thermal modification and a combined approach of thermo-chemical modification were compared. All modification processes caused a darkening that for the high modification intensities became close to the aesthetics of some of the most renowned tropical hardwood species. The higher the modification intensity, the higher the improvement. In particular, chemical and thermo-chemical modification processes significantly decreased the liquid water uptake. As regards the mechanical performances while stiffness and strength did not change abruptly and hardness increased, the resistance towards dynamic impacts significantly decreased with every kind of modification process. Thermo-chemical modifications resulted to be an interesting way to improve most of the physical properties of wood with outstanding behaviour in terms of colour appearance and reduction of water uptake in wet environments. An increased brittleness is the weakest point for foreseen fields of application.},\n\tnumber = {0},\n\turldate = {2022-11-28},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Goli, Giacomo and Negro, Federico and Emmerich, Lukas and Militz, Holger},\n\tmonth = nov,\n\tyear = {2022},\n\tnote = {Publisher: Taylor \\& Francis\n\\_eprint: https://doi.org/10.1080/17480272.2022.2143281},\n\tkeywords = {DMDHEU, Beech wood, high-demanding applications, thermo-chemical modification},\n\tpages = {1--9},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\XKYG56S4\\\\Goli et al. - 2022 - Thermal and chemical modification of wood – a comb.pdf:application/pdf},\n}\n\n
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\n Chemical and thermo-chemical modification processes were applied to European beech wood to make it applicable for interior applications which place high demands on aesthetics, hygrothermal and water resistance performance. In particular, the use of modified wood in kitchen tools was foreseen. Impregnation modification with a 20% DMDHEU solution, thermal modification and a combined approach of thermo-chemical modification were compared. All modification processes caused a darkening that for the high modification intensities became close to the aesthetics of some of the most renowned tropical hardwood species. The higher the modification intensity, the higher the improvement. In particular, chemical and thermo-chemical modification processes significantly decreased the liquid water uptake. As regards the mechanical performances while stiffness and strength did not change abruptly and hardness increased, the resistance towards dynamic impacts significantly decreased with every kind of modification process. Thermo-chemical modifications resulted to be an interesting way to improve most of the physical properties of wood with outstanding behaviour in terms of colour appearance and reduction of water uptake in wet environments. An increased brittleness is the weakest point for foreseen fields of application.\n
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\n \n\n \n \n \n \n \n \n Thermal and chemical modification of wood – a combined approach for exclusive, high-demanding performance products.\n \n \n \n \n\n\n \n Goli, G.; Negro, F.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Wood Material Science & Engineering,1–9. November 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ThermalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{goli_thermal_2022-2,\n\ttitle = {Thermal and chemical modification of wood – a combined approach for exclusive, high-demanding performance products},\n\tissn = {1748-0272, 1748-0280},\n\turl = {https://www.tandfonline.com/doi/full/10.1080/17480272.2022.2143281},\n\tdoi = {10.1080/17480272.2022.2143281},\n\tabstract = {Chemical and thermo-chemical modification processes were applied to European beech wood to make it applicable for interior applications which place high demands on aesthetics, hygrothermal and water resistance performance. In particular, the use of modified wood in kitchen tools was foreseen. Impregnation modification with a 20\\% DMDHEU solution, thermal modification and a combined approach of thermo-chemical modification were compared. All modification processes caused a darkening that for the high modification intensities became close to the aesthetics of some of the most renowned tropical hardwood species. The higher the modification intensity, the higher the improvement. In particular, chemical and thermo-chemical modification processes significantly decreased the liquid water uptake. As regards the mechanical performances while stiffness and strength did not change abruptly and hardness increased, the resistance towards dynamic impacts significantly decreased with every kind of modification process. Thermo-chemical modifications resulted to be an interesting way to improve most of the physical properties of wood with outstanding behaviour in terms of colour appearance and reduction of water uptake in wet environments. An increased brittleness is the weakest point for foreseen fields of application.},\n\tlanguage = {en},\n\turldate = {2022-11-28},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Goli, Giacomo and Negro, Federico and Emmerich, Lukas and Militz, Holger},\n\tmonth = nov,\n\tyear = {2022},\n\tpages = {1--9},\n\tfile = {Goli et al. - 2022 - Thermal and chemical modification of wood – a comb.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\NWDQF9XV\\\\Goli et al. - 2022 - Thermal and chemical modification of wood – a comb.pdf:application/pdf},\n}\n\n
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\n Chemical and thermo-chemical modification processes were applied to European beech wood to make it applicable for interior applications which place high demands on aesthetics, hygrothermal and water resistance performance. In particular, the use of modified wood in kitchen tools was foreseen. Impregnation modification with a 20% DMDHEU solution, thermal modification and a combined approach of thermo-chemical modification were compared. All modification processes caused a darkening that for the high modification intensities became close to the aesthetics of some of the most renowned tropical hardwood species. The higher the modification intensity, the higher the improvement. In particular, chemical and thermo-chemical modification processes significantly decreased the liquid water uptake. As regards the mechanical performances while stiffness and strength did not change abruptly and hardness increased, the resistance towards dynamic impacts significantly decreased with every kind of modification process. Thermo-chemical modifications resulted to be an interesting way to improve most of the physical properties of wood with outstanding behaviour in terms of colour appearance and reduction of water uptake in wet environments. An increased brittleness is the weakest point for foreseen fields of application.\n
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\n \n\n \n \n \n \n \n Preliminary work on a new method for moisture conditioning of wood for decay tests.\n \n \n \n\n\n \n Fredriksson, M.; Thybring, E.; Emmerich, L.; and Brischke, C.\n\n\n \n\n\n\n In Proceedings of the 18th meeting of the Northern European Network for Wood Science and Engineering (WSE 2022), pages 162–164, Göttingen, Germany, September 2022. \n \n\n\n\n
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@inproceedings{fredriksson_preliminary_2022,\n\taddress = {Göttingen, Germany},\n\ttitle = {Preliminary work on a new method for moisture conditioning of wood for decay tests},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of the 18th meeting of the {Northern} {European} {Network} for {Wood} {Science} and {Engineering} ({WSE} 2022)},\n\tauthor = {Fredriksson, M. and Thybring, E.E. and Emmerich, L. and Brischke, C.},\n\tmonth = sep,\n\tyear = {2022},\n\tpages = {162--164},\n}\n\n
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\n \n\n \n \n \n \n \n \n Wood chemical modification based on bio-based polycarboxylic acid and polyols – status quo and future perspectives.\n \n \n \n \n\n\n \n Kurkowiak, K.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Wood Material Science & Engineering, 17(6): 1040–1054. November 2022.\n \n\n\n\n
\n\n\n\n \n \n \"WoodPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 3 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{kurkowiak_wood_2022-1,\n\ttitle = {Wood chemical modification based on bio-based polycarboxylic acid and polyols – status quo and future perspectives},\n\tvolume = {17},\n\tissn = {1748-0272, 1748-0280},\n\turl = {https://www.tandfonline.com/doi/full/10.1080/17480272.2021.1925961},\n\tdoi = {10.1080/17480272.2021.1925961},\n\tabstract = {Novel approaches for a non-toxic protection of timber have been investigated and referred to as “wood modification”. Especially, chemical impregnation modifications show promising opportunities to improve a wide range of wood properties. Yet, most of the available treatments resort to technically synthesized oil-based chemicals. Therefore, new ways of wood modification based on citric acid (CA) and bio-based low-molecular-weight polyols (CA-PO) – both originating from renewable resources – are under test and appear to be a promising alternative to available processes. The mode of action is expected to be a combination of both a cell wall bulking, and a cross-linking between CA-PO polyesters and wood cell wall polymers. However, the treatment process requires optimization with regard to the impregnation system and parameters for an industrial scale implementation. This paper provides a general background about CA-based solid wood treatment and its effects on the characteristics of wood. Moreover, it discusses current developments in this area and points out existing research gaps, with one focus being the process of development on an industrial scale.},\n\tlanguage = {en},\n\tnumber = {6},\n\turldate = {2022-12-13},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Kurkowiak, Katarzyna and Emmerich, Lukas and Militz, Holger},\n\tmonth = nov,\n\tyear = {2022},\n\tpages = {1040--1054},\n\tfile = {Kurkowiak et al. - 2022 - Wood chemical modification based on bio-based poly.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\56ZEM64Q\\\\Kurkowiak et al. - 2022 - Wood chemical modification based on bio-based poly.pdf:application/pdf},\n}\n\n
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\n Novel approaches for a non-toxic protection of timber have been investigated and referred to as “wood modification”. Especially, chemical impregnation modifications show promising opportunities to improve a wide range of wood properties. Yet, most of the available treatments resort to technically synthesized oil-based chemicals. Therefore, new ways of wood modification based on citric acid (CA) and bio-based low-molecular-weight polyols (CA-PO) – both originating from renewable resources – are under test and appear to be a promising alternative to available processes. The mode of action is expected to be a combination of both a cell wall bulking, and a cross-linking between CA-PO polyesters and wood cell wall polymers. However, the treatment process requires optimization with regard to the impregnation system and parameters for an industrial scale implementation. This paper provides a general background about CA-based solid wood treatment and its effects on the characteristics of wood. Moreover, it discusses current developments in this area and points out existing research gaps, with one focus being the process of development on an industrial scale.\n
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\n \n\n \n \n \n \n \n \n Modeling the Material Resistance of Wood—Part 2: Validation and Optimization of the Meyer-Veltrup Model.\n \n \n \n \n\n\n \n Brischke, C.; Alfredsen, G.; Humar, M.; Conti, E.; Cookson, L.; Emmerich, L.; Flæte, P. O.; Fortino, S.; Francis, L.; Hundhausen, U.; Irbe, I.; Jacobs, K.; Klamer, M.; Kržišnik, D.; Lesar, B.; Melcher, E.; Meyer-Veltrup, L.; Morrell, J. J.; Norton, J.; Palanti, S.; Presley, G.; Reinprecht, L.; Singh, T.; Stirling, R.; Venäläinen, M.; Westin, M.; Wong, A. H. H.; and Suttie, E.\n\n\n \n\n\n\n Forests, 12(5): 576. May 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{brischke_modeling_2021,\n\ttitle = {Modeling the {Material} {Resistance} of {Wood}—{Part} 2: {Validation} and {Optimization} of the {Meyer}-{Veltrup} {Model}},\n\tvolume = {12},\n\tissn = {1999-4907},\n\tshorttitle = {Modeling the {Material} {Resistance} of {Wood}—{Part} 2},\n\turl = {https://www.mdpi.com/1999-4907/12/5/576},\n\tdoi = {10.3390/f12050576},\n\tabstract = {Service life planning with timber requires reliable models for quantifying the effects of exposure-related parameters and the material-inherent resistance of wood against biotic agents. The Meyer-Veltrup model was the first attempt to account for inherent protective properties and the wetting ability of wood to quantify resistance of wood in a quantitative manner. Based on test data on brown, white, and soft rot as well as moisture dynamics, the decay rates of different untreated wood species were predicted relative to the reference species of Norway spruce (Picea abies). The present study aimed to validate and optimize the resistance model for a wider range of wood species including very durable species, thermally and chemically modified wood, and preservative treated wood. The general model structure was shown to also be suitable for highly durable materials, but previously defined maximum thresholds had to be adjusted (i.e., maximum values of factors accounting for wetting ability and inherent protective properties) to 18 instead of 5 compared to Norway spruce. As expected, both the enlarged span in durability and the use of numerous and partly very divergent data sources (i.e., test methods, test locations, and types of data presentation) led to a decrease in the predictive power of the model compared to the original. In addition to the need to enlarge the database quantity and improve its quality, in particular for treated wood, it might be advantageous to use separate models for untreated and treated wood as long as the effect of additional impact variables (e.g., treatment quality) can be accounted for. Nevertheless, the adapted Meyer-Veltrup model will serve as an instrument to quantify material resistance for a wide range of wood-based materials as an input for comprehensive service life prediction software.},\n\tlanguage = {en},\n\tnumber = {5},\n\turldate = {2021-05-18},\n\tjournal = {Forests},\n\tauthor = {Brischke, Christian and Alfredsen, Gry and Humar, Miha and Conti, Elena and Cookson, Laurie and Emmerich, Lukas and Flæte, Per Otto and Fortino, Stefania and Francis, Lesley and Hundhausen, Ulrich and Irbe, Ilze and Jacobs, Kordula and Klamer, Morten and Kržišnik, Davor and Lesar, Boštjan and Melcher, Eckhard and Meyer-Veltrup, Linda and Morrell, Jeffrey J. and Norton, Jack and Palanti, Sabrina and Presley, Gerald and Reinprecht, Ladislav and Singh, Tripti and Stirling, Rod and Venäläinen, Martti and Westin, Mats and Wong, Andrew H. H. and Suttie, Ed},\n\tmonth = may,\n\tyear = {2021},\n\tpages = {576},\n\tfile = {Brischke et al. - 2021 - Modeling the Material Resistance of Wood—Part 2 V.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\APG4279F\\\\Brischke et al. - 2021 - Modeling the Material Resistance of Wood—Part 2 V.pdf:application/pdf},\n}\n\n
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\n Service life planning with timber requires reliable models for quantifying the effects of exposure-related parameters and the material-inherent resistance of wood against biotic agents. The Meyer-Veltrup model was the first attempt to account for inherent protective properties and the wetting ability of wood to quantify resistance of wood in a quantitative manner. Based on test data on brown, white, and soft rot as well as moisture dynamics, the decay rates of different untreated wood species were predicted relative to the reference species of Norway spruce (Picea abies). The present study aimed to validate and optimize the resistance model for a wider range of wood species including very durable species, thermally and chemically modified wood, and preservative treated wood. The general model structure was shown to also be suitable for highly durable materials, but previously defined maximum thresholds had to be adjusted (i.e., maximum values of factors accounting for wetting ability and inherent protective properties) to 18 instead of 5 compared to Norway spruce. As expected, both the enlarged span in durability and the use of numerous and partly very divergent data sources (i.e., test methods, test locations, and types of data presentation) led to a decrease in the predictive power of the model compared to the original. In addition to the need to enlarge the database quantity and improve its quality, in particular for treated wood, it might be advantageous to use separate models for untreated and treated wood as long as the effect of additional impact variables (e.g., treatment quality) can be accounted for. Nevertheless, the adapted Meyer-Veltrup model will serve as an instrument to quantify material resistance for a wide range of wood-based materials as an input for comprehensive service life prediction software.\n
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\n \n\n \n \n \n \n \n \n Modelling the Material Resistance of Wood—Part 3: Relative Resistance in above and in Ground Situations—Results of a Global Survey.\n \n \n \n \n\n\n \n Brischke, C.; Alfredsen, G.; Humar, M.; Conti, E.; Cookson, L.; Emmerich, L.; Flæte, P. O.; Fortino, S.; Francis, L.; Hundhausen, U.; Irbe, I.; Jacobs, K.; Klamer, M.; Kržišnik, D.; Lesar, B.; Melcher, E.; Meyer-Veltrup, L.; Morrell, J. J.; Norton, J.; Palanti, S.; Presley, G.; Reinprecht, L.; Singh, T.; Stirling, R.; Venäläinen, M.; Westin, M.; Wong, A. H. H.; and Suttie, E.\n\n\n \n\n\n\n Forests, 12(5): 590. May 2021.\n Number: 5 Publisher: Multidisciplinary Digital Publishing Institute\n\n\n\n
\n\n\n\n \n \n \"ModellingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{brischke_modelling_2021,\n\ttitle = {Modelling the {Material} {Resistance} of {Wood}—{Part} 3: {Relative} {Resistance} in above and in {Ground} {Situations}—{Results} of a {Global} {Survey}},\n\tvolume = {12},\n\tcopyright = {http://creativecommons.org/licenses/by/3.0/},\n\tshorttitle = {Modelling the {Material} {Resistance} of {Wood}—{Part} 3},\n\turl = {https://www.mdpi.com/1999-4907/12/5/590},\n\tdoi = {10.3390/f12050590},\n\tabstract = {Durability-based designs with timber require reliable information about the wood properties and how they affect its performance under variable exposure conditions. This study aimed at utilizing a material resistance model (Part 2 of this publication) based on a dose–response approach for predicting the relative decay rates in above-ground situations. Laboratory and field test data were, for the first time, surveyed globally and used to determine material-specific resistance dose values, which were correlated to decay rates. In addition, laboratory indicators were used to adapt the material resistance model to in-ground exposure. The relationship between decay rates in- and above-ground, the predictive power of laboratory indicators to predict such decay rates, and a method for implementing both in a service life prediction tool, were established based on 195 hardwoods, 29 softwoods, 19 modified timbers, and 41 preservative-treated timbers.},\n\tlanguage = {en},\n\tnumber = {5},\n\turldate = {2021-05-12},\n\tjournal = {Forests},\n\tauthor = {Brischke, Christian and Alfredsen, Gry and Humar, Miha and Conti, Elena and Cookson, Laurie and Emmerich, Lukas and Flæte, Per Otto and Fortino, Stefania and Francis, Lesley and Hundhausen, Ulrich and Irbe, Ilze and Jacobs, Kordula and Klamer, Morten and Kržišnik, Davor and Lesar, Boštjan and Melcher, Eckhard and Meyer-Veltrup, Linda and Morrell, Jeffrey J. and Norton, Jack and Palanti, Sabrina and Presley, Gerald and Reinprecht, Ladislav and Singh, Tripti and Stirling, Rod and Venäläinen, Martti and Westin, Mats and Wong, Andrew H. H. and Suttie, Ed},\n\tmonth = may,\n\tyear = {2021},\n\tnote = {Number: 5\nPublisher: Multidisciplinary Digital Publishing Institute},\n\tkeywords = {fungal decay, biological durability, moisture dynamics, wetting ability, service life prediction, moisture performance, dose–response model, water uptake and release},\n\tpages = {590},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\QVVXGR28\\\\Brischke et al. - 2021 - Modelling the Material Resistance of Wood—Part 3 .pdf:application/pdf;Snapshot:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\N25TPJEI\\\\590.html:text/html},\n}\n\n
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\n Durability-based designs with timber require reliable information about the wood properties and how they affect its performance under variable exposure conditions. This study aimed at utilizing a material resistance model (Part 2 of this publication) based on a dose–response approach for predicting the relative decay rates in above-ground situations. Laboratory and field test data were, for the first time, surveyed globally and used to determine material-specific resistance dose values, which were correlated to decay rates. In addition, laboratory indicators were used to adapt the material resistance model to in-ground exposure. The relationship between decay rates in- and above-ground, the predictive power of laboratory indicators to predict such decay rates, and a method for implementing both in a service life prediction tool, were established based on 195 hardwoods, 29 softwoods, 19 modified timbers, and 41 preservative-treated timbers.\n
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\n \n\n \n \n \n \n \n Performance of resin-treated solid wood and laminated veneer lumber (LVL) under marine conditions.\n \n \n \n\n\n \n Emmerich, L.; Brischke, C.; Bicke, S.; and Militz, H.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 11, Stockholm, Sweden, March 2021. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 2 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{emmerich_performance_2021,\n\taddress = {Stockholm, Sweden},\n\ttitle = {Performance of resin-treated solid wood and laminated veneer lumber ({LVL}) under marine conditions},\n\tdoi = {IRG/WP 21-10973},\n\tabstract = {Wood is a traditional building material in the marine environment, where it is exposed to extremely harsh conditions. Most of the indigenous softwood and hardwood species in Europe are not durable against attack by marine organisms. Recently, wood modification has been considered as an alternative to protect non-durable wood species under use class (UC) 5 (EN 335, 2013) conditions. The present study focused on treatment of solid wood and laminated veneer lumber (LVL) with the thermosetting resin 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU), its derivatives and low molecular phenol-formaldehyde (PF). The results evidenced that treatments with formaldehyde-containing thermosetting resins like DMDHEU and PF improved the resistance against attack by shipworms significantly. The latter was shown for both, solid wood and LVL specimens. In Scots pine sapwood specimens, treatment with DMDHEU caused higher improvements in the resistance against shipworm attack compared to Radiata pine and poplar specimens. Formaldehyde-free DMDHEU derivatives did not provide any resistance against marine borers compared to untreated control panels. In summary, wood modification with thermosetting resins has good potential to be used in the marine environment (UC 5). However, the mechanisms of protective action are not fully understood yet and require further studies on how curing processes, chemical distribution and production processes for wood-based composites affect the marine borer resistance. Besides that, an upscaling to large-sized dimensions is essential to implement such innovative technologies as building materials under UC 5 conditions in the near future.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Emmerich, Lukas and Brischke, Christian and Bicke, Sascha and Militz, Holger},\n\tmonth = mar,\n\tyear = {2021},\n\tpages = {11},\n}\n\n
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\n Wood is a traditional building material in the marine environment, where it is exposed to extremely harsh conditions. Most of the indigenous softwood and hardwood species in Europe are not durable against attack by marine organisms. Recently, wood modification has been considered as an alternative to protect non-durable wood species under use class (UC) 5 (EN 335, 2013) conditions. The present study focused on treatment of solid wood and laminated veneer lumber (LVL) with the thermosetting resin 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU), its derivatives and low molecular phenol-formaldehyde (PF). The results evidenced that treatments with formaldehyde-containing thermosetting resins like DMDHEU and PF improved the resistance against attack by shipworms significantly. The latter was shown for both, solid wood and LVL specimens. In Scots pine sapwood specimens, treatment with DMDHEU caused higher improvements in the resistance against shipworm attack compared to Radiata pine and poplar specimens. Formaldehyde-free DMDHEU derivatives did not provide any resistance against marine borers compared to untreated control panels. In summary, wood modification with thermosetting resins has good potential to be used in the marine environment (UC 5). However, the mechanisms of protective action are not fully understood yet and require further studies on how curing processes, chemical distribution and production processes for wood-based composites affect the marine borer resistance. Besides that, an upscaling to large-sized dimensions is essential to implement such innovative technologies as building materials under UC 5 conditions in the near future.\n
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\n \n\n \n \n \n \n \n \n Growth behavior of wood-destroying fungi in chemically modified wood: wood degradation and translocation of nitrogen compounds.\n \n \n \n \n\n\n \n Emmerich, L.; Bleckmann, M.; Strohbusch, S.; Brischke, C.; Bollmus, S.; and Militz, H.\n\n\n \n\n\n\n Holzforschung, 0(0): 000010151520200252. February 2021.\n \n\n\n\n
\n\n\n\n \n \n \"GrowthPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 7 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{emmerich_growth_2021,\n\ttitle = {Growth behavior of wood-destroying fungi in chemically modified wood: wood degradation and translocation of nitrogen compounds},\n\tvolume = {0},\n\tissn = {1437-434X, 0018-3830},\n\tshorttitle = {Growth behavior of wood-destroying fungi in chemically modified wood},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2020-0252/html},\n\tdoi = {10.1515/hf-2020-0252},\n\tabstract = {Abstract\n            \n              Chemical wood modification has been used to modify wood and improve its decay resistance. However, the mode of protective action is still not fully understood. Occasionally, outdoor products made from chemically modified timber (CMT) show internal decay while their outer shell remains intact. Hence, it was hypothesized that wood decay fungi may grow through CMT without losing their capability to degrade non-modified wood. This study aimed at developing a laboratory test set-up to investigate (1) whether decay fungi grow through CMT and (2) retain their ability to degrade non-modified wood. Acetylated and 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) treated wood were used in decay tests with modified ‘mantle specimens’ and untreated ‘core dowels’. It became evident that white rot (\n              Trametes versicolor\n              ), brown rot (\n              Coniophora puteana\n              ) and soft rot fungi can grow through CMT without losing their ability to degrade untreated wood. Consequently, full volume impregnation of wood with the modifying agent is required to achieve complete protection of wooden products. In decay tests with DMDHEU treated specimens, significant amounts of apparently non-fixated DMDHEU were translocated from modified mantle specimens to untreated wood cores. A diffusion-driven transport of nitrogen and DMDHEU seemed to be responsible for mass translocation during decay testing.},\n\tlanguage = {en},\n\tnumber = {0},\n\turldate = {2021-02-16},\n\tjournal = {Holzforschung},\n\tauthor = {Emmerich, Lukas and Bleckmann, Maja and Strohbusch, Sarah and Brischke, Christian and Bollmus, Susanne and Militz, Holger},\n\tmonth = feb,\n\tyear = {2021},\n\tkeywords = {DMDHEU, acetylation, chemical wood modification, durability, fungal growth, nitrogen analysis},\n\tpages = {000010151520200252},\n\tfile = {Emmerich et al. - 2021 - Growth behavior of wood-destroying fungi in chemic.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\HAESN92C\\\\Emmerich et al. - 2021 - Growth behavior of wood-destroying fungi in chemic.pdf:application/pdf},\n}\n\n
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\n Abstract Chemical wood modification has been used to modify wood and improve its decay resistance. However, the mode of protective action is still not fully understood. Occasionally, outdoor products made from chemically modified timber (CMT) show internal decay while their outer shell remains intact. Hence, it was hypothesized that wood decay fungi may grow through CMT without losing their capability to degrade non-modified wood. This study aimed at developing a laboratory test set-up to investigate (1) whether decay fungi grow through CMT and (2) retain their ability to degrade non-modified wood. Acetylated and 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) treated wood were used in decay tests with modified ‘mantle specimens’ and untreated ‘core dowels’. It became evident that white rot ( Trametes versicolor ), brown rot ( Coniophora puteana ) and soft rot fungi can grow through CMT without losing their ability to degrade untreated wood. Consequently, full volume impregnation of wood with the modifying agent is required to achieve complete protection of wooden products. In decay tests with DMDHEU treated specimens, significant amounts of apparently non-fixated DMDHEU were translocated from modified mantle specimens to untreated wood cores. A diffusion-driven transport of nitrogen and DMDHEU seemed to be responsible for mass translocation during decay testing.\n
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\n \n\n \n \n \n \n \n \n Dynamic strength properties and structural integrity of wood modified with cyclic N -methylol and N -methyl compounds.\n \n \n \n \n\n\n \n Emmerich, L.; Brischke, C.; Bollmus, S.; and Militz, H.\n\n\n \n\n\n\n Holzforschung, 0(0): 000010151520210013. April 2021.\n \n\n\n\n
\n\n\n\n \n \n \"DynamicPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{emmerich_dynamic_2021,\n\ttitle = {Dynamic strength properties and structural integrity of wood modified with cyclic \\textit{{N}} -methylol and \\textit{{N}} -methyl compounds},\n\tvolume = {0},\n\tissn = {1437-434X, 0018-3830},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2021-0013/html},\n\tdoi = {10.1515/hf-2021-0013},\n\tabstract = {Cyclic N-methylol compounds have been used for cell wall impregnation modifications of wood. Besides an improved decay resistance and dimensional stability, the modifications resulted in a decrease of wood’s dynamic strength properties. However, the mechanisms behind a significant loss in dynamic strength are not fully understood yet. In this study, wood blocks were treated with the N-methylol compounds 1,3-dimethylol4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU (mDMDHEU) and the N-methyl compound 1,3-dimethyl-4,5-dihydroxy-ethyleneurea (DMeDHEU). In order to study the factors that control the changes of wood performance under dynamic loads, single (impact bending strength, IBS) and multiple dynamic impact (resistance to impact milling, RIM) tests were applied. It became evident, that reductions in IBS and RIM increased with increasing solid content, formaldehyde content and catalyst concentration of the impregnation solutions, but were not affected by a cold-water leaching. Differences in structural integrity of wood modified with N-methylol and N-methyl compounds were more pronounced than those of IBS. Therefore, RIM appeared more sensitive to changes on cellular level, as a higher degree of co-condensation of the N-methylol compounds with cell wall polymers was expected in comparison with the N-methyl compound.},\n\tlanguage = {en},\n\tnumber = {0},\n\turldate = {2021-05-18},\n\tjournal = {Holzforschung},\n\tauthor = {Emmerich, Lukas and Brischke, Christian and Bollmus, Susanne and Militz, Holger},\n\tmonth = apr,\n\tyear = {2021},\n\tkeywords = {DMDHEU, resistance to impact milling, mDMDHEU, impact bending strength, DMeDHEU, structural integrity},\n\tpages = {000010151520210013},\n\tfile = {Emmerich et al. - 2021 - Dynamic strength properties and structural integri.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\6BKYE94F\\\\Emmerich et al. - 2021 - Dynamic strength properties and structural integri.pdf:application/pdf},\n}\n\n
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\n Cyclic N-methylol compounds have been used for cell wall impregnation modifications of wood. Besides an improved decay resistance and dimensional stability, the modifications resulted in a decrease of wood’s dynamic strength properties. However, the mechanisms behind a significant loss in dynamic strength are not fully understood yet. In this study, wood blocks were treated with the N-methylol compounds 1,3-dimethylol4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU (mDMDHEU) and the N-methyl compound 1,3-dimethyl-4,5-dihydroxy-ethyleneurea (DMeDHEU). In order to study the factors that control the changes of wood performance under dynamic loads, single (impact bending strength, IBS) and multiple dynamic impact (resistance to impact milling, RIM) tests were applied. It became evident, that reductions in IBS and RIM increased with increasing solid content, formaldehyde content and catalyst concentration of the impregnation solutions, but were not affected by a cold-water leaching. Differences in structural integrity of wood modified with N-methylol and N-methyl compounds were more pronounced than those of IBS. Therefore, RIM appeared more sensitive to changes on cellular level, as a higher degree of co-condensation of the N-methylol compounds with cell wall polymers was expected in comparison with the N-methyl compound.\n
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\n \n\n \n \n \n \n \n Chemisch modifiziertes Holz – nachhaltig und klimafreundlich – also das (Bau)material der Zukunft? Von der aktuellen Forschung in die Schule.\n \n \n \n\n\n \n Maaß, M.; Volkert, C.; Emmerich, L.; Militz, H.; and Waitz, T.\n\n\n \n\n\n\n CHEMKON. 2021.\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{maas_chemisch_2021,\n\ttitle = {Chemisch modifiziertes {Holz} – nachhaltig und klimafreundlich – also das ({Bau})material der {Zukunft}? {Von} der aktuellen {Forschung} in die {Schule}.},\n\tjournal = {CHEMKON},\n\tauthor = {Maaß, M.C. and Volkert, C. and Emmerich, L. and Militz, H. and Waitz, T.},\n\tyear = {2021},\n\tkeywords = {wood modification, wood, Holz, polymers, Holzmodifizierung, sustainability, hardness measurement, Härtemessung, Nachhaltigkeit, Polymere},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\UW5SZ2PV\\\\Maaß et al. - 2021 - Chemisch modifiziertes Holz – nachhaltig und klima.pdf:application/pdf;Maaß et al. - 2021 - Chemisch modifiziertes Holz – nachhaltig und klima.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\CADVISG6\\\\Maaß et al. - 2021 - Chemisch modifiziertes Holz – nachhaltig und klima.pdf:application/pdf;Snapshot:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\FF59UYKB\\\\ckon.html:text/html},\n}\n\n
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\n \n\n \n \n \n \n \n \n Wood modification with N-methylol and N-methyl compounds: a case study on how non-fixated chemicals in modified wood may affect the classification of their durability.\n \n \n \n \n\n\n \n Emmerich, L.; Brischke, C.; and Militz, H.\n\n\n \n\n\n\n Holzforschung, 75(11): 1061–1065. November 2021.\n Publisher: De Gruyter\n\n\n\n
\n\n\n\n \n \n \"WoodPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{emmerich_wood_2021,\n\ttitle = {Wood modification with {N}-methylol and {N}-methyl compounds: a case study on how non-fixated chemicals in modified wood may affect the classification of their durability},\n\tvolume = {75},\n\tissn = {1437-434X},\n\tshorttitle = {Wood modification with {N}-methylol and {N}-methyl compounds},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2021-0037/pdf},\n\tdoi = {10.1515/hf-2021-0037},\n\tabstract = {Chemical modification is increasing the durability of wood against biological deterioration. Usually, the effect of a new treatment on the durability of wood is screened in laboratory decay tests, where durability classes are assigned on the basis of the mass loss ( ML ) caused by degrading fungi. The aim of this study was to demonstrate how non-fixated chemicals in modified wood may affect fungal ML measurements and corresponding durability classification when wood samples are incubated under humid conditions for long periods. Wood blocks were treated with solutions of 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU), methylated DMDHEU (mDMDHEU) and 1,3-dimethyl-4,5-dihydroxyethyleneurea (DMeDHEU) and subjected to consecutive cold-water leaching cycles. Significant amounts of non-fixated chemicals were removed from the wood by three leaching cycles and might lead to ML mistaken as response of fungal decay. Consequently, the treated material was assigned erroneously by up to four durability classes (DC) worse than material which did not include leachable, non-fixated chemicals. Thus, for a reliable durability classification of chemically modified wood, prolonged leaching procedures are recommended to assure that the measured ML is entirely attributed to fungal decay.},\n\tlanguage = {en},\n\tnumber = {11},\n\turldate = {2022-01-17},\n\tjournal = {Holzforschung},\n\tauthor = {Emmerich, Lukas and Brischke, Christian and Militz, Holger},\n\tmonth = nov,\n\tyear = {2021},\n\tnote = {Publisher: De Gruyter},\n\tkeywords = {wood modification, EN 84, N-methylol, ageing, N-methyl, water leaching},\n\tpages = {1061--1065},\n}\n\n
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\n Chemical modification is increasing the durability of wood against biological deterioration. Usually, the effect of a new treatment on the durability of wood is screened in laboratory decay tests, where durability classes are assigned on the basis of the mass loss ( ML ) caused by degrading fungi. The aim of this study was to demonstrate how non-fixated chemicals in modified wood may affect fungal ML measurements and corresponding durability classification when wood samples are incubated under humid conditions for long periods. Wood blocks were treated with solutions of 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU), methylated DMDHEU (mDMDHEU) and 1,3-dimethyl-4,5-dihydroxyethyleneurea (DMeDHEU) and subjected to consecutive cold-water leaching cycles. Significant amounts of non-fixated chemicals were removed from the wood by three leaching cycles and might lead to ML mistaken as response of fungal decay. Consequently, the treated material was assigned erroneously by up to four durability classes (DC) worse than material which did not include leachable, non-fixated chemicals. Thus, for a reliable durability classification of chemically modified wood, prolonged leaching procedures are recommended to assure that the measured ML is entirely attributed to fungal decay.\n
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\n \n\n \n \n \n \n \n \n Sorption behavior and swelling of citric acid and sorbitol (SorCA) treated wood.\n \n \n \n \n\n\n \n Kurkowiak, K.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Holzforschung, 75(12): 1136–1149. December 2021.\n Publisher: De Gruyter\n\n\n\n
\n\n\n\n \n \n \"SorptionPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 2 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{kurkowiak_sorption_2021,\n\ttitle = {Sorption behavior and swelling of citric acid and sorbitol ({SorCA}) treated wood},\n\tvolume = {75},\n\tissn = {1437-434X},\n\turl = {https://www.degruyter.com/document/doi/10.1515/hf-2021-0068/html},\n\tdoi = {10.1515/hf-2021-0068},\n\tabstract = {Citric acid together with sorbitol (SorCA) have been used to modify wood and improve its properties, such as dimensional stability and biological durability, which partly result from its swelling and sorption behavior. However, the underlying mechanism of water interaction with SorCA-treated wood is very complex and not fully understood. Previous research confirmed cell wall bulking and suggested cross-linking, however the extent of their contribution to moisture-induced changes has not been researched. This study investigated the effect of SorCA treatment on sorption properties of wood in the hygroscopic range (0–95\\% RH). Scots pine sapwood ( Pinus sylvestris L.) was chemically modified with an aqueous SorCA solution at different treatment levels and measured by dynamic vapor sorption (DVS). The observed permanent increase in oven-dry dimensions did not result in a decreased swelling compared to untreated specimens. It was ascribed to the excessive expansion of cell wall matrix caused by a degradation of cell wall constituents by the acidic impregnation solution. However, a reduction in moisture content in comparison to untreated reference was detected. Present findings suggest that the SorCA polyester structure is altered after impregnation inside the wood and affects its sorption behavior by covalent bonding and, presumably, cross-linking with wood polymer constituents.},\n\tlanguage = {en},\n\tnumber = {12},\n\turldate = {2022-01-03},\n\tjournal = {Holzforschung},\n\tauthor = {Kurkowiak, Katarzyna and Emmerich, Lukas and Militz, Holger},\n\tmonth = dec,\n\tyear = {2021},\n\tnote = {Publisher: De Gruyter},\n\tkeywords = {wood modification, citric acid, polyesterification, sorbitol, dynamic water vapor sorption (DVS), swelling},\n\tpages = {1136--1149},\n}\n\n
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\n Citric acid together with sorbitol (SorCA) have been used to modify wood and improve its properties, such as dimensional stability and biological durability, which partly result from its swelling and sorption behavior. However, the underlying mechanism of water interaction with SorCA-treated wood is very complex and not fully understood. Previous research confirmed cell wall bulking and suggested cross-linking, however the extent of their contribution to moisture-induced changes has not been researched. This study investigated the effect of SorCA treatment on sorption properties of wood in the hygroscopic range (0–95% RH). Scots pine sapwood ( Pinus sylvestris L.) was chemically modified with an aqueous SorCA solution at different treatment levels and measured by dynamic vapor sorption (DVS). The observed permanent increase in oven-dry dimensions did not result in a decreased swelling compared to untreated specimens. It was ascribed to the excessive expansion of cell wall matrix caused by a degradation of cell wall constituents by the acidic impregnation solution. However, a reduction in moisture content in comparison to untreated reference was detected. Present findings suggest that the SorCA polyester structure is altered after impregnation inside the wood and affects its sorption behavior by covalent bonding and, presumably, cross-linking with wood polymer constituents.\n
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\n \n\n \n \n \n \n \n \n Comparative studies on the durability and moisture performance of wood modified with cyclic N-methylol and N-methyl compounds.\n \n \n \n \n\n\n \n Emmerich, L.; Ehrmann, A.; Brischke, C.; and Militz, H.\n\n\n \n\n\n\n Wood Science and Technology, 55(6): 1531–1554. November 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ComparativePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{emmerich_comparative_2021,\n\ttitle = {Comparative studies on the durability and moisture performance of wood modified with cyclic {N}-methylol and {N}-methyl compounds},\n\tvolume = {55},\n\tissn = {1432-5225},\n\turl = {https://doi.org/10.1007/s00226-021-01303-8},\n\tdoi = {10.1007/s00226-021-01303-8},\n\tabstract = {Glyoxal-based condensation resins like 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) have been used to modify wood and improve its resistance against decaying fungi. High biological durability of DMDHEU-treated wood has already been confirmed in laboratory and field tests in the past. However, the modes of protective action behind an improved decay resistance are not fully understood yet. Furthermore, it is questionable how the use of formaldehyde-poor N-methylol and formaldehyde-free N-methyl compounds instead of DMDHEU affects the moisture behavior and durability, respectively. In this study, wood blocks were treated with N-methylol (DMDHEU, methylated DMDHEU) and N-methyl compounds (1,3-dimethyl-4,5-dihydroxyethyleneurea; DMeDHEU). Untreated and modified specimens were exposed to different moisture regimes and wood-destroying fungi in order to study the indicators that control changes in the wetting ability and decay resistance. Both N-methylol and N-methyl compounds decreased the water uptake and release and increased the durability of Scots pine sapwood from ‘not durable’ (DC 5) to ‘very durable to durable’ (DC 1–2). However, high fluctuations were observed in water uptake and release as well as mass loss (ML) caused by fungal decay, when modified specimens were tested without passing through a cold-water leaching. Consequently, a significant effect of the leaching procedure according to EN 84 on the durability classification could be established. The latter appeared more pronounced for treatments with N-methyl compounds compared to N-methylol compounds. Finally, wetting ability (kwa) and resistance indicating factors (kinh) enabled a forecast of high biological durability for both treatments with N-methylol and N-methyl compounds under real service life conditions.},\n\tlanguage = {en},\n\tnumber = {6},\n\turldate = {2021-11-02},\n\tjournal = {Wood Science and Technology},\n\tauthor = {Emmerich, Lukas and Ehrmann, Alexander and Brischke, Christian and Militz, Holger},\n\tmonth = nov,\n\tyear = {2021},\n\tpages = {1531--1554},\n\tfile = {Springer Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\P3KTLDXZ\\\\Emmerich et al. - 2021 - Comparative studies on the durability and moisture.pdf:application/pdf},\n}\n\n
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\n Glyoxal-based condensation resins like 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) have been used to modify wood and improve its resistance against decaying fungi. High biological durability of DMDHEU-treated wood has already been confirmed in laboratory and field tests in the past. However, the modes of protective action behind an improved decay resistance are not fully understood yet. Furthermore, it is questionable how the use of formaldehyde-poor N-methylol and formaldehyde-free N-methyl compounds instead of DMDHEU affects the moisture behavior and durability, respectively. In this study, wood blocks were treated with N-methylol (DMDHEU, methylated DMDHEU) and N-methyl compounds (1,3-dimethyl-4,5-dihydroxyethyleneurea; DMeDHEU). Untreated and modified specimens were exposed to different moisture regimes and wood-destroying fungi in order to study the indicators that control changes in the wetting ability and decay resistance. Both N-methylol and N-methyl compounds decreased the water uptake and release and increased the durability of Scots pine sapwood from ‘not durable’ (DC 5) to ‘very durable to durable’ (DC 1–2). However, high fluctuations were observed in water uptake and release as well as mass loss (ML) caused by fungal decay, when modified specimens were tested without passing through a cold-water leaching. Consequently, a significant effect of the leaching procedure according to EN 84 on the durability classification could be established. The latter appeared more pronounced for treatments with N-methyl compounds compared to N-methylol compounds. Finally, wetting ability (kwa) and resistance indicating factors (kinh) enabled a forecast of high biological durability for both treatments with N-methylol and N-methyl compounds under real service life conditions.\n
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\n \n\n \n \n \n \n \n \n Hydroplastic polymers as eco-friendly hydrosetting plastics.\n \n \n \n \n\n\n \n Wang, J.; Emmerich, L.; Wu, J.; Vana, P.; and Zhang, K.\n\n\n \n\n\n\n Nature Sustainability, 4(10): 877–883. October 2021.\n \n\n\n\n
\n\n\n\n \n \n \"HydroplasticPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{wang_hydroplastic_2021,\n\ttitle = {Hydroplastic polymers as eco-friendly hydrosetting plastics},\n\tvolume = {4},\n\tissn = {2398-9629},\n\turl = {https://www.nature.com/articles/s41893-021-00743-1},\n\tdoi = {10.1038/s41893-021-00743-1},\n\tlanguage = {en},\n\tnumber = {10},\n\turldate = {2021-10-22},\n\tjournal = {Nature Sustainability},\n\tauthor = {Wang, Jiaxiu and Emmerich, Lukas and Wu, Jianfeng and Vana, Philipp and Zhang, Kai},\n\tmonth = oct,\n\tyear = {2021},\n\tpages = {877--883},\n\tfile = {Wang et al. - 2021 - Hydroplastic polymers as eco-friendly hydrosetting.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\GE8QA5KC\\\\Wang et al. - 2021 - Hydroplastic polymers as eco-friendly hydrosetting.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n Foil Storage for Conservation of Beetle-infested Spruce Logs – a Feasibility Study.\n \n \n \n\n\n \n Brischke, C.; Bollmus, S.; Braun, M.; and Emmerich, L.\n\n\n \n\n\n\n In Proceedings of the 17th annual meeting of the Northern European Network for Wood Science and Engineering (WSE 2021), pages 86–88, Kaunas, Lithuania, October 2021. \n \n\n\n\n
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@inproceedings{brischke_foil_2021,\n\taddress = {Kaunas, Lithuania},\n\ttitle = {Foil {Storage} for {Conservation} of {Beetle}-infested {Spruce} {Logs} – a {Feasibility} {Study}},\n\tisbn = {978-609-02-1762-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of the 17th annual meeting of the {Northern} {European} {Network} for {Wood} {Science} and {Engineering} ({WSE} 2021)},\n\tauthor = {Brischke, Christian and Bollmus, Susanne and Braun, Marco and Emmerich, Lukas},\n\tmonth = oct,\n\tyear = {2021},\n\tpages = {86--88},\n}\n\n
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\n \n\n \n \n \n \n \n Initial Quality Control Trials of Sorbitol and Citric Acid (SorCA) Modified Wood.\n \n \n \n\n\n \n Kurkowiak, K.; Mayer, A. K.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of the 17th annual meeting of the Northern European Network for Wood Science and Engineering (WSE 2021), pages 19–21, Kaunas, Lithuania, October 2021. \n \n\n\n\n
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@inproceedings{kurkowiak_initial_2021,\n\taddress = {Kaunas, Lithuania},\n\ttitle = {Initial {Quality} {Control} {Trials} of {Sorbitol} and {Citric} {Acid} ({SorCA}) {Modified} {Wood}},\n\tisbn = {978-609-02-1762-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of the 17th annual meeting of the {Northern} {European} {Network} for {Wood} {Science} and {Engineering} ({WSE} 2021)},\n\tauthor = {Kurkowiak, Katarzyna and Mayer, Aaron Kilian and Emmerich, Lukas and Militz, Holger},\n\tmonth = oct,\n\tyear = {2021},\n\tpages = {19--21},\n}\n\n
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\n \n\n \n \n \n \n \n Electrical moisture content measurements of modified wood.\n \n \n \n\n\n \n Emmerich, L.; and Brischke, C.\n\n\n \n\n\n\n Holztechnologie, 62(2): 11–22. 2021.\n \n\n\n\n
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@article{emmerich_electrical_2021,\n\ttitle = {Electrical moisture content measurements of modified wood},\n\tvolume = {62},\n\tabstract = {Material specific moisture content-electrical resistance (MC-R) functions were calculated for thermally and chemically modified (DMDHEU, acetylation, furfurylation) timber. In comparison with an untreated reference, the electrical conductivity of wood increased by both thermal and chemical modifications. Hence, material-specific MC-R functions are needed for modified wood to receive the highest possible accuracy when monitoring moisture developments based on electrical R measurements. When using MC-R functions of untreated wood for MC estimates in modified materials of the same wood species, this resulted in overestimates of the modified woods´ actual MCmaterial by up to 12.0 \\%. The overestimate of the actual MC increased further (up to 14.0 \\%), when MCwood was considered for the modified materials. Consequently, applying MC-R functions of untreated wood for MC estimates in modified materials overestimates the actual MC and by that underestimates the predicted service life of wooden constructions significantly. The presented, material-specific MC-R functions may require a correction, when process conditions (temperature, pressure atmosphere) or chemical amounts vary as crucial factors for the electrical properties in wood.},\n\tlanguage = {en},\n\tnumber = {2},\n\tjournal = {Holztechnologie},\n\tauthor = {Emmerich, Lukas and Brischke, Christian},\n\tyear = {2021},\n\tpages = {11--22},\n}\n\n
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\n Material specific moisture content-electrical resistance (MC-R) functions were calculated for thermally and chemically modified (DMDHEU, acetylation, furfurylation) timber. In comparison with an untreated reference, the electrical conductivity of wood increased by both thermal and chemical modifications. Hence, material-specific MC-R functions are needed for modified wood to receive the highest possible accuracy when monitoring moisture developments based on electrical R measurements. When using MC-R functions of untreated wood for MC estimates in modified materials of the same wood species, this resulted in overestimates of the modified woods´ actual MCmaterial by up to 12.0 %. The overestimate of the actual MC increased further (up to 14.0 %), when MCwood was considered for the modified materials. Consequently, applying MC-R functions of untreated wood for MC estimates in modified materials overestimates the actual MC and by that underestimates the predicted service life of wooden constructions significantly. The presented, material-specific MC-R functions may require a correction, when process conditions (temperature, pressure atmosphere) or chemical amounts vary as crucial factors for the electrical properties in wood.\n
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\n  \n 2020\n \n \n (9)\n \n \n
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\n \n\n \n \n \n \n \n Folienlagerung von Käferholz.\n \n \n \n\n\n \n Brischke, C.; Bollmus, S.; Braun, M.; and Emmerich, L.\n\n\n \n\n\n\n Holz-Zentralblatt, 146(15): 296–297. 2020.\n \n\n\n\n
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@article{brischke_folienlagerung_2020,\n\ttitle = {Folienlagerung von {Käferholz}},\n\tvolume = {146},\n\tlanguage = {Deutsch},\n\tnumber = {15},\n\tjournal = {Holz-Zentralblatt},\n\tauthor = {Brischke, Christian and Bollmus, Susanne and Braun, Marco and Emmerich, Lukas},\n\tyear = {2020},\n\tpages = {296--297},\n\tfile = {Brischke et al. - 2020 - Folienlagerung von Käferholz.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\HMP6IZFP\\\\Brischke et al. - 2020 - Folienlagerung von Käferholz.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n \n Study on the impregnation quality of rubberwood (Hevea brasiliensis Müll. Arg.) and English oak (Quercus robur L.) sawn veneers after treatment with 1,3-dimethylol-4,5- dihydroxyethyleneurea (DMDHEU).\n \n \n \n \n\n\n \n Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n Holzforschung, 74(4): 362–371. February 2020.\n \n\n\n\n
\n\n\n\n \n \n \"StudyPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 3 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{emmerich_study_2020,\n\ttitle = {Study on the impregnation quality of rubberwood ({Hevea} brasiliensis {Müll}. {Arg}.) and {English} oak ({Quercus} robur {L}.) sawn veneers after treatment with 1,3-dimethylol-4,5- dihydroxyethyleneurea ({DMDHEU})},\n\tvolume = {74},\n\tissn = {1437-434X, 0018-3830},\n\turl = {http://www.degruyter.com/view/j/hfsg.ahead-of-print/hf-2019-0110/hf-2019-0110.xml},\n\tdoi = {10.1515/hf-2019-0110},\n\tabstract = {The efficacy of chemical wood modification is closely related to the permeability of the wood species and the cell wall deposition of the reagent, causing a permanent swelling (“bulking effect”). This study aimed to analyze how rubberwood (Hevea brasiliensis Müll. Arg.) and English oak (Quercus robur L.) may be affected by chemical wood modification, although they are known to show either variations in permeability or being less permeable. Thin clear veneers were treated with 1,3-dimethylol-4,5dihydroxyethyleneurea (DMDHEU) which resulted in significantly reduced moisture-induced swelling and increased the resistance to static and dynamic indentation loads. The results evidenced significantly lower liquid uptakes in English oak compared to rubberwood, which directly affected the weight percent gains (WPGs) and restricted the range for potential improvements of the material properties. Surprisingly, rubberwood showed a lower cell wall bulking, which, in comparison with English oak, indicated less DMDHEU monomers entering the cell walls and rather being located in the cell lumens. Atypical for treatments with cell wall penetration chemicals, no further decrease in maximum swelling (SM) was detected with increasing bulking in rubberwood specimens. English oak showed higher variations in DMDHEU distribution within treated veneers and between earlywood and latewood areas, effecting a less homogeneous performance.},\n\tlanguage = {en},\n\tnumber = {4},\n\turldate = {2020-02-17},\n\tjournal = {Holzforschung},\n\tauthor = {Emmerich, Lukas and Militz, Holger},\n\tmonth = feb,\n\tyear = {2020},\n\tpages = {362--371},\n\tfile = {Emmerich und Militz - 2020 - Study on the impregnation quality of rubberwood (H.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\K3U9U975\\\\Emmerich und Militz - 2020 - Study on the impregnation quality of rubberwood (H.pdf:application/pdf},\n}\n\n
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\n The efficacy of chemical wood modification is closely related to the permeability of the wood species and the cell wall deposition of the reagent, causing a permanent swelling (“bulking effect”). This study aimed to analyze how rubberwood (Hevea brasiliensis Müll. Arg.) and English oak (Quercus robur L.) may be affected by chemical wood modification, although they are known to show either variations in permeability or being less permeable. Thin clear veneers were treated with 1,3-dimethylol-4,5dihydroxyethyleneurea (DMDHEU) which resulted in significantly reduced moisture-induced swelling and increased the resistance to static and dynamic indentation loads. The results evidenced significantly lower liquid uptakes in English oak compared to rubberwood, which directly affected the weight percent gains (WPGs) and restricted the range for potential improvements of the material properties. Surprisingly, rubberwood showed a lower cell wall bulking, which, in comparison with English oak, indicated less DMDHEU monomers entering the cell walls and rather being located in the cell lumens. Atypical for treatments with cell wall penetration chemicals, no further decrease in maximum swelling (SM) was detected with increasing bulking in rubberwood specimens. English oak showed higher variations in DMDHEU distribution within treated veneers and between earlywood and latewood areas, effecting a less homogeneous performance.\n
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\n \n\n \n \n \n \n \n \n Long-term performance of DMDHEU-treated wood installed in different test set-ups in ground, above ground and in the marine environment.\n \n \n \n \n\n\n \n Emmerich, L.; Militz, H.; and Brischke, C.\n\n\n \n\n\n\n International Wood Products Journal, 11(1): 27–37. January 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Long-termPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{emmerich_long-term_2020,\n\ttitle = {Long-term performance of {DMDHEU}-treated wood installed in different test set-ups in ground, above ground and in the marine environment},\n\tvolume = {11},\n\tissn = {2042-6445},\n\turl = {https://doi.org/10.1080/20426445.2020.1715553},\n\tdoi = {10.1080/20426445.2020.1715553},\n\tabstract = {The field performance of wood modified with 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) is reported after outdoor exposure above ground (UC3), in ground (UC4) and in the marine environment (UC5) at six different sites in Europe and Australia. Results from more than seven years field testing with respect to the DMDHEU treatment level, wood species (Scots pine, European beech, spotted gum and slash pine) and climate conditions were evaluated. DMDHEU was shown to significantly improve the biological durability of Scots pine sapwood after exposure under UC3, UC4 and UC5 conditions, which confirmed previous findings on the laboratory scale. The latter was classified as ‘durable to very durable’ (durability class DC1-2). However, DMDHEU modification seemed to be more efficient in Scots pine, slash pine and spotted gum so that higher chemical loadings are required for European beech to reach similar resistance against wood-destroying fungi. Under feeding pressure of Teredo navalis, DMDHEU treatment was graded as ‘durable’.},\n\tnumber = {1},\n\turldate = {2020-02-14},\n\tjournal = {International Wood Products Journal},\n\tauthor = {Emmerich, Lukas and Militz, Holger and Brischke, Christian},\n\tmonth = jan,\n\tyear = {2020},\n\tkeywords = {DMDHEU, resin treatment, Beech, pine, chemical wood modification, durability, field tests, N-methylol},\n\tpages = {27--37},\n}\n\n
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\n The field performance of wood modified with 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) is reported after outdoor exposure above ground (UC3), in ground (UC4) and in the marine environment (UC5) at six different sites in Europe and Australia. Results from more than seven years field testing with respect to the DMDHEU treatment level, wood species (Scots pine, European beech, spotted gum and slash pine) and climate conditions were evaluated. DMDHEU was shown to significantly improve the biological durability of Scots pine sapwood after exposure under UC3, UC4 and UC5 conditions, which confirmed previous findings on the laboratory scale. The latter was classified as ‘durable to very durable’ (durability class DC1-2). However, DMDHEU modification seemed to be more efficient in Scots pine, slash pine and spotted gum so that higher chemical loadings are required for European beech to reach similar resistance against wood-destroying fungi. Under feeding pressure of Teredo navalis, DMDHEU treatment was graded as ‘durable’.\n
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\n \n\n \n \n \n \n \n \n Sorption behavior and hydroxyl accessibility of wood treated with different cyclic N-methylol compounds.\n \n \n \n \n\n\n \n Emmerich, L.; Altgen, M.; Rautkari, L.; and Militz, H.\n\n\n \n\n\n\n Journal of Materials Science, 55(35): 16561–16575. December 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SorptionPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{emmerich_sorption_2020,\n\ttitle = {Sorption behavior and hydroxyl accessibility of wood treated with different cyclic {N}-methylol compounds},\n\tvolume = {55},\n\tissn = {1573-4803},\n\turl = {https://doi.org/10.1007/s10853-020-05224-y},\n\tdoi = {10.1007/s10853-020-05224-y},\n\tabstract = {Cyclic N-methylol compounds such as 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) have been used to modify wood and prevent negative effects related to the uptake of moisture. However, the changes in the sorption behavior of wood by treatments with DMDHEU and its derivatives are not fully understood. In the present study, wood blocks were treated with DMDHEU, ether-modified DMDHEU and diethyleneglycolated DMDHEU in order to study the factors that control the changes in moisture uptake in the hygroscopic range (0–95\\% RH). Dimensional changes of wood blocks during water soaking cycles suggested that the treatments caused a permanent cell wall bulking, whereas the swelling restraint by cross-linking of adjacent cell wall polymers was not permanent. However, the changes in water vapor sorption were not only a result of the cell wall bulking effect that reduced the space in the cell wall to accommodate water. The N-methylol compounds within the wood also provided additional sorption sites, but there was no correlation between absorbed water and accessible OH groups. It was speculated that the co-condensation of the N-methylol compounds with wood polymers had a significant effect on the sorption of the treated wood. At elevated RH, pure resins that were formed by self-condensation took up large quantities of moisture. However, when the N-methylol compounds were heat-cured within the hierarchical structure of wood, the moisture uptake of the treated wood at elevated RH was even lower compared to unmodified wood. Furthermore, the covalent bond formation between wood and resin prolonged the attainment of an equilibrium moisture content.},\n\tlanguage = {en},\n\tnumber = {35},\n\turldate = {2020-10-07},\n\tjournal = {Journal of Materials Science},\n\tauthor = {Emmerich, Lukas and Altgen, Michael and Rautkari, Lauri and Militz, Holger},\n\tmonth = dec,\n\tyear = {2020},\n\tpages = {16561--16575},\n\tfile = {Springer Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\GPZXBVY9\\\\Emmerich et al. - 2020 - Sorption behavior and hydroxyl accessibility of wo.pdf:application/pdf;Springer Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\8X6AXKVE\\\\Emmerich et al. - 2020 - Sorption behavior and hydroxyl accessibility of wo.pdf:application/pdf},\n}\n\n
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\n Cyclic N-methylol compounds such as 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) have been used to modify wood and prevent negative effects related to the uptake of moisture. However, the changes in the sorption behavior of wood by treatments with DMDHEU and its derivatives are not fully understood. In the present study, wood blocks were treated with DMDHEU, ether-modified DMDHEU and diethyleneglycolated DMDHEU in order to study the factors that control the changes in moisture uptake in the hygroscopic range (0–95% RH). Dimensional changes of wood blocks during water soaking cycles suggested that the treatments caused a permanent cell wall bulking, whereas the swelling restraint by cross-linking of adjacent cell wall polymers was not permanent. However, the changes in water vapor sorption were not only a result of the cell wall bulking effect that reduced the space in the cell wall to accommodate water. The N-methylol compounds within the wood also provided additional sorption sites, but there was no correlation between absorbed water and accessible OH groups. It was speculated that the co-condensation of the N-methylol compounds with wood polymers had a significant effect on the sorption of the treated wood. At elevated RH, pure resins that were formed by self-condensation took up large quantities of moisture. However, when the N-methylol compounds were heat-cured within the hierarchical structure of wood, the moisture uptake of the treated wood at elevated RH was even lower compared to unmodified wood. Furthermore, the covalent bond formation between wood and resin prolonged the attainment of an equilibrium moisture content.\n
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\n \n\n \n \n \n \n \n \n Predicting the Outdoor Moisture Performance of Wood Based on Laboratory Indicators.\n \n \n \n \n\n\n \n Emmerich, L.; Brischke, C.; Sievert, M.; Schulz, M. S.; Jaeger, A.; Beulshausen, A.; and Humar, M.\n\n\n \n\n\n\n Forests, 11(9): 1001. September 2020.\n \n\n\n\n
\n\n\n\n \n \n \"PredictingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{emmerich_predicting_2020,\n\ttitle = {Predicting the {Outdoor} {Moisture} {Performance} of {Wood} {Based} on {Laboratory} {Indicators}},\n\tvolume = {11},\n\tissn = {1999-4907},\n\turl = {https://www.mdpi.com/1999-4907/11/9/1001},\n\tdoi = {10.3390/f11091001},\n\tabstract = {The service life of wood in outdoor use under humid conditions is mainly determined by its material resistance and the exposure situation. Different standards such as EN 350 (2016) point on the relevance of wood’s resistance against moisture for its expected service life. Recently, different standardized but also numerous nonstandardized methods were suggested to test the water permeability of wooden materials. In the context of this study, different European-grown softand hardwoods, tropical hardwoods, modified wood and wood treated with water- and oil-borne preservatives were subjected to floating and submersion tests according to CEN/TS 16818 (2018) and different short-term water uptake and release tests. Moisture performance data from field tests with the same materials were analyzed and used to assess the predictive power of different laboratory moisture indicators. The moisture characteristics suggested by CEN/TS 16818 (2018)—rm168 (residual moisture content after water uptake and release processes) and res312 (residue as a percentage of the absorbed moisture)—showed the little potential to predict the outdoor moisture performance of the tested materials. In contrast, the mean moisture content during absorption and desorption (MCmean) predicted well the outdoor moisture performance of the materials under test. Short-term water uptake and release of small specimens also showed high predictive power.},\n\tlanguage = {en},\n\tnumber = {9},\n\turldate = {2020-09-21},\n\tjournal = {Forests},\n\tauthor = {Emmerich, Lukas and Brischke, Christian and Sievert, Marten and Schulz, Manuel S. and Jaeger, Anne-Cathrin and Beulshausen, Arne and Humar, Miha},\n\tmonth = sep,\n\tyear = {2020},\n\tpages = {1001},\n}\n\n
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\n\n\n
\n The service life of wood in outdoor use under humid conditions is mainly determined by its material resistance and the exposure situation. Different standards such as EN 350 (2016) point on the relevance of wood’s resistance against moisture for its expected service life. Recently, different standardized but also numerous nonstandardized methods were suggested to test the water permeability of wooden materials. In the context of this study, different European-grown softand hardwoods, tropical hardwoods, modified wood and wood treated with water- and oil-borne preservatives were subjected to floating and submersion tests according to CEN/TS 16818 (2018) and different short-term water uptake and release tests. Moisture performance data from field tests with the same materials were analyzed and used to assess the predictive power of different laboratory moisture indicators. The moisture characteristics suggested by CEN/TS 16818 (2018)—rm168 (residual moisture content after water uptake and release processes) and res312 (residue as a percentage of the absorbed moisture)—showed the little potential to predict the outdoor moisture performance of the tested materials. In contrast, the mean moisture content during absorption and desorption (MCmean) predicted well the outdoor moisture performance of the materials under test. Short-term water uptake and release of small specimens also showed high predictive power.\n
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\n \n\n \n \n \n \n \n Fire Retardant Treatment of Wood – State of the Art and Future Perspectives.\n \n \n \n\n\n \n Sauerbier, P.; Mayer, A. K.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Makovicka Osvaldova, L.; Markert, F.; and Zelinka, S. L., editor(s), Wood & Fire Safety, pages 97–102. Springer International Publishing, Cham, Switzerland, 2020.\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 3 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@incollection{sauerbier_fire_2020,\n\taddress = {Cham, Switzerland},\n\ttitle = {Fire {Retardant} {Treatment} of {Wood} – {State} of the {Art} and {Future} {Perspectives}},\n\tisbn = {978-3-030-41235-7},\n\tabstract = {Outdoor and indoor exposed wooden structures are prone to the hazard of fire. Thisr is often inevitable and hardly avoidable by factors such as the design. However, wood is widely used as a structural element in buildings, it is present all-over public places and the main source for indoor furniture. Thus, and due to recent incidents, the demand for an effective and leaching-resistant fire protection is rising. In addition, fire protection technologies are desired, which survive mechanical processing. Considering the latter, protective surface coatings show a high fire protection, while on opposite they are very sensitive to mechanical damages. Therefore, various approaches based on a full impregnation of timber with fire retardants have been studied. In the past aluminum, boron, halogens (e.g. bromine) and more recently phosphorus and nitrogen, were shown to be effective fire retardants in wood. Nowadays, most conventional fire retardant systems are halogen-free, while boron is still used. However, boron shows a low resistance to leaching and is classified as a SVHC candidate, which brings up health and environmental issues. The same is true for formaldehyde. Concerning environmental issues, nitrogen and phosphorus were found to be promising alternatives and highly effective fire retardants. Leaching in service was slightly reduced compared to boron but a decrease in strength properties was detected after treatment of wood with those compounds. In general, an increased hygroscopicity of wood was found after any of the listed treatments, together with a leaching of the flame-retardant chemical which was still too high to guarantee a long-term fire protection in wood exposed outside. The overall aim of this study is to (1) give an overview about the past developments and most established fire retardant chemicals and (2) review recent findings and developments in terms of permanent fire retardant treatments of wood.},\n\tlanguage = {en},\n\tbooktitle = {Wood \\& {Fire} {Safety}},\n\tpublisher = {Springer International Publishing},\n\tauthor = {Sauerbier, Philipp and Mayer, Aaron Kilian and Emmerich, Lukas and Militz, Holger},\n\teditor = {Makovicka Osvaldova, Linda and Markert, Frank and Zelinka, Samuel L.},\n\tyear = {2020},\n\tkeywords = {Chemical wood modification, Fire retardant, Impregnation, Review},\n\tpages = {97--102},\n\tfile = {Sauerbier et al. - 2020 - Fire Retardant Treatment of Wood – State of the Ar.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\IXQACCBJ\\\\Sauerbier et al. - 2020 - Fire Retardant Treatment of Wood – State of the Ar.pdf:application/pdf},\n}\n\n
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\n Outdoor and indoor exposed wooden structures are prone to the hazard of fire. Thisr is often inevitable and hardly avoidable by factors such as the design. However, wood is widely used as a structural element in buildings, it is present all-over public places and the main source for indoor furniture. Thus, and due to recent incidents, the demand for an effective and leaching-resistant fire protection is rising. In addition, fire protection technologies are desired, which survive mechanical processing. Considering the latter, protective surface coatings show a high fire protection, while on opposite they are very sensitive to mechanical damages. Therefore, various approaches based on a full impregnation of timber with fire retardants have been studied. In the past aluminum, boron, halogens (e.g. bromine) and more recently phosphorus and nitrogen, were shown to be effective fire retardants in wood. Nowadays, most conventional fire retardant systems are halogen-free, while boron is still used. However, boron shows a low resistance to leaching and is classified as a SVHC candidate, which brings up health and environmental issues. The same is true for formaldehyde. Concerning environmental issues, nitrogen and phosphorus were found to be promising alternatives and highly effective fire retardants. Leaching in service was slightly reduced compared to boron but a decrease in strength properties was detected after treatment of wood with those compounds. In general, an increased hygroscopicity of wood was found after any of the listed treatments, together with a leaching of the flame-retardant chemical which was still too high to guarantee a long-term fire protection in wood exposed outside. The overall aim of this study is to (1) give an overview about the past developments and most established fire retardant chemicals and (2) review recent findings and developments in terms of permanent fire retardant treatments of wood.\n
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\n \n\n \n \n \n \n \n Biological durability of sapling wood.\n \n \n \n\n\n \n Brischke, C.; Emmerich, L.; Nienaber, D. G B; and Bollmus, S.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 11, The International Research Group on Wood Protection, June 2020. online, webinar\n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{brischke_biological_2020,\n\taddress = {The International Research Group on Wood Protection},\n\ttitle = {Biological durability of sapling wood},\n\tdoi = {IRG/WP 20-10967},\n\tabstract = {Sapling-wood products from different wood species such as willow (Salix spp.) and Common hazel (Corylus avellana) are frequently used for gardening and outdoor decoration purposes. Remaining bark is suggested to provide additional biological durability. Even for temporary outdoor use it seemed questionable that durability of juvenile sapwood can provide acceptably long service lives of horticultural products. Therefore, sapling-wood from in total seven Europeangrown wood species was submitted to laboratory and field durability tests. In field tests, specimens with and without bark were tested in comparison and submitted to differently severe exposure situations, i.e. in ground contact, and above ground situations with and without water trapping. All materials under test were classified ‘not durable’ independently from any potential protective effect of remaining bark, which contradicted their suitability for outdoor applications if multiannual use is desired.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tpublisher = {online, webinar},\n\tauthor = {Brischke, Christian and Emmerich, Lukas and Nienaber, Dirk G B and Bollmus, Susanne},\n\tmonth = jun,\n\tyear = {2020},\n\tpages = {11},\n\tfile = {Brischke et al. - Biological durability of sapling wood.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\LCR9RQAE\\\\Brischke et al. - Biological durability of sapling wood.pdf:application/pdf},\n}\n\n
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\n Sapling-wood products from different wood species such as willow (Salix spp.) and Common hazel (Corylus avellana) are frequently used for gardening and outdoor decoration purposes. Remaining bark is suggested to provide additional biological durability. Even for temporary outdoor use it seemed questionable that durability of juvenile sapwood can provide acceptably long service lives of horticultural products. Therefore, sapling-wood from in total seven Europeangrown wood species was submitted to laboratory and field durability tests. In field tests, specimens with and without bark were tested in comparison and submitted to differently severe exposure situations, i.e. in ground contact, and above ground situations with and without water trapping. All materials under test were classified ‘not durable’ independently from any potential protective effect of remaining bark, which contradicted their suitability for outdoor applications if multiannual use is desired.\n
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\n \n\n \n \n \n \n \n \n Quality Control of Thermally Modified Timber Using Dynamic Vapor Sorption (DVS) Analysis.\n \n \n \n \n\n\n \n Humar, M.; Repič, R.; Kržišnik, D.; Lesar, B.; Cerc Korošec, R.; Brischke, C.; Emmerich, L.; and Rep, G.\n\n\n \n\n\n\n Forests, 11(6): 666. June 2020.\n Number: 6 Publisher: Multidisciplinary Digital Publishing Institute\n\n\n\n
\n\n\n\n \n \n \"QualityPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{humar_quality_2020,\n\ttitle = {Quality {Control} of {Thermally} {Modified} {Timber} {Using} {Dynamic} {Vapor} {Sorption} ({DVS}) {Analysis}},\n\tvolume = {11},\n\tcopyright = {http://creativecommons.org/licenses/by/3.0/},\n\turl = {https://www.mdpi.com/1999-4907/11/6/666},\n\tdoi = {10.3390/f11060666},\n\tabstract = {The importance of thermal modification is increasing worldwide. Increased use of thermally modified timber (TMT) has resulted in a need for reliable quality control, comprising control of variation of the production within defined limits, allowing third-party control in the case of certification and the regulation of customer complaints and claims. Techniques are thus needed to characterise the modification of quality in terms of improved target properties of TMT during industrial production, and of TMT products that have been in service for an arbitrary time. In this study, we aimed to utilise dynamic vapor sorption (DVS) for this purpose. Norway spruce (Picea abies) and European beech (Fagus sylvatica) samples were thermally modified at different temperatures according to different heat treatment techniques: (1) the Silvapro process based on an initial vacuum; (2) an air heat treatment, whereby samples were wrapped in aluminium foil; (3) thermal modification of wood samples in the ambient atmosphere in a laboratory oven. Wood samples from closed processes were analysed for validation. TMT was characterised with respect to mass loss, colour and density. Mass loss of wood due to modification (MLTM) was correlated with factors derived from DVS analysis. The present DVS measurements suggest that the equilibrium wood moisture content (EMC95\\% RH), the time to reach 10\\% wood moisture content (t10\\% MC), and the elongation factor, c, derived from a logarithmic function, can serve as alternative parameters to characterise the quality of several thermal modification processes. Further studies are recommended using other wood species, different modification processes and further parameters gained from DVS measurements to understand the robustness and the predictive power of the applied technique.},\n\tlanguage = {en},\n\tnumber = {6},\n\turldate = {2020-06-11},\n\tjournal = {Forests},\n\tauthor = {Humar, Miha and Repič, Rožle and Kržišnik, Davor and Lesar, Boštjan and Cerc Korošec, Romana and Brischke, Christian and Emmerich, Lukas and Rep, Gregor},\n\tmonth = jun,\n\tyear = {2020},\n\tnote = {Number: 6\nPublisher: Multidisciplinary Digital Publishing Institute},\n\tkeywords = {wood, moisture content, thermal modification, quality control, dynamic vapour sorption},\n\tpages = {666},\n\tfile = {Humar et al. - 2020 - Quality Control of Thermally Modified Timber Using.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\FMQZFPXS\\\\Humar et al. - 2020 - Quality Control of Thermally Modified Timber Using.pdf:application/pdf},\n}\n\n
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\n The importance of thermal modification is increasing worldwide. Increased use of thermally modified timber (TMT) has resulted in a need for reliable quality control, comprising control of variation of the production within defined limits, allowing third-party control in the case of certification and the regulation of customer complaints and claims. Techniques are thus needed to characterise the modification of quality in terms of improved target properties of TMT during industrial production, and of TMT products that have been in service for an arbitrary time. In this study, we aimed to utilise dynamic vapor sorption (DVS) for this purpose. Norway spruce (Picea abies) and European beech (Fagus sylvatica) samples were thermally modified at different temperatures according to different heat treatment techniques: (1) the Silvapro process based on an initial vacuum; (2) an air heat treatment, whereby samples were wrapped in aluminium foil; (3) thermal modification of wood samples in the ambient atmosphere in a laboratory oven. Wood samples from closed processes were analysed for validation. TMT was characterised with respect to mass loss, colour and density. Mass loss of wood due to modification (MLTM) was correlated with factors derived from DVS analysis. The present DVS measurements suggest that the equilibrium wood moisture content (EMC95% RH), the time to reach 10% wood moisture content (t10% MC), and the elongation factor, c, derived from a logarithmic function, can serve as alternative parameters to characterise the quality of several thermal modification processes. Further studies are recommended using other wood species, different modification processes and further parameters gained from DVS measurements to understand the robustness and the predictive power of the applied technique.\n
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\n \n\n \n \n \n \n \n The effect of citric acid and sorbitol on the swelling and sorption behavior of wood.\n \n \n \n\n\n \n Kurkowiak, K.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of the 16 th Annual Meeting of the Northern European Network for Wood Science and Engineering (WSE2020), pages 23–25, Helsinki, Finland, 2020. \n \n\n\n\n
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@inproceedings{kurkowiak_effect_2020,\n\taddress = {Helsinki, Finland},\n\ttitle = {The effect of citric acid and sorbitol on the swelling and sorption behavior of wood},\n\tisbn = {978-609-02-1762-7},\n\tlanguage = {EN},\n\tbooktitle = {Proceedings of the 16 th {Annual} {Meeting} of the {Northern} {European} {Network} for {Wood} {Science} and {Engineering} ({WSE2020})},\n\tauthor = {Kurkowiak, Katarzyna and Emmerich, Lukas and Militz, Holger},\n\tyear = {2020},\n\tpages = {23--25},\n}\n\n
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\n \n\n \n \n \n \n \n \n Modification of Scots Pine with Activated Glucose and Citric Acid: Physical and Mechanical Properties.\n \n \n \n \n\n\n \n Guo, W.; Xiao, Z.; Wentzel, M.; Emmerich, L.; Xie, Y.; and Militz, H.\n\n\n \n\n\n\n BioResources, 14(2): 3445–3458. March 2019.\n Number: 2\n\n\n\n
\n\n\n\n \n \n \"ModificationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{guo_modification_2019,\n\ttitle = {Modification of {Scots} {Pine} with {Activated} {Glucose} and {Citric} {Acid}: {Physical} and {Mechanical} {Properties}},\n\tvolume = {14},\n\tcopyright = {Copyright (c)},\n\tissn = {1930-2126},\n\tshorttitle = {Modification of {Scots} {Pine} with {Activated} {Glucose} and {Citric} {Acid}},\n\turl = {https://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_14_2_3445_Guo_Modification_Scots_Pine_Glucose},\n\tabstract = {An eco-friendly agent mainly consisting of activated glucose (AG) and citric acid (CA) was investigated for its potential wood modification applications. Scots pine (Pinus sylvestris L.) sapwood was treated with AG and CA both individually and in combination. The treatments with the combined agent resulted in an increase in the weight percent gain and decrease in the leaching ratio, which suggested a synergy between the two components for their fixation in wood. The dynamic vapor sorption behavior indicated an increased sorption at a higher AG concentration. Compared with the AG treatment, the CA treatment more effectively improved the dimensional stability of the wood. The modulus of elasticity was not influenced by the treatments, and the modulus of rupture was slightly reduced. Incorporation of AG in the CA inhibited the decrease in impact strength of wood compared to treatment with CA alone, which was a result of reduced crosslinking from the CA within the wood matrix. Fourier transform infrared (FTIR) spectroscopy revealed an enhanced absorbance, indicating development of ester bonds due to the treatment.},\n\tlanguage = {en},\n\tnumber = {2},\n\turldate = {2020-02-21},\n\tjournal = {BioResources},\n\tauthor = {Guo, Wenjun and Xiao, Zefang and Wentzel, Maximilian and Emmerich, Lukas and Xie, Yanjun and Militz, Holger},\n\tmonth = mar,\n\tyear = {2019},\n\tnote = {Number: 2},\n\tkeywords = {Citric acid, FTIR, Wood modification, Activated glucose, Physical and mechanical properties},\n\tpages = {3445--3458},\n\tfile = {Guo et al. - 2019 - Modification of Scots Pine with Activated Glucose .pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\CMW473UM\\\\Guo et al. - 2019 - Modification of Scots Pine with Activated Glucose .pdf:application/pdf},\n}\n\n
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\n An eco-friendly agent mainly consisting of activated glucose (AG) and citric acid (CA) was investigated for its potential wood modification applications. Scots pine (Pinus sylvestris L.) sapwood was treated with AG and CA both individually and in combination. The treatments with the combined agent resulted in an increase in the weight percent gain and decrease in the leaching ratio, which suggested a synergy between the two components for their fixation in wood. The dynamic vapor sorption behavior indicated an increased sorption at a higher AG concentration. Compared with the AG treatment, the CA treatment more effectively improved the dimensional stability of the wood. The modulus of elasticity was not influenced by the treatments, and the modulus of rupture was slightly reduced. Incorporation of AG in the CA inhibited the decrease in impact strength of wood compared to treatment with CA alone, which was a result of reduced crosslinking from the CA within the wood matrix. Fourier transform infrared (FTIR) spectroscopy revealed an enhanced absorbance, indicating development of ester bonds due to the treatment.\n
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\n \n\n \n \n \n \n \n Study on the ability of wood-destroying fungi to grow through chemically modified wood.\n \n \n \n\n\n \n Emmerich, L.; Strohbusch, S.; Brischke, C.; Bollmus, S.; and Militz, H.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 18, Quebec City, Quebec, Canada, May 2019. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{emmerich_study_2019,\n\taddress = {Quebec City, Quebec, Canada},\n\ttitle = {Study on the ability of wood-destroying fungi to grow through chemically modified wood},\n\tdoi = {IRG/WP 19-40858},\n\tabstract = {Over the last decades, chemical wood modification technologies were developed to increase the resistance against attack by wood-destroying organisms without using biocides. Most of those technologies are based on an impregnation step initially. In most treated wood products, mainly by using solid wood in thicker dimensions as in posts, poles, sleepers, deckings etc. it is known that wood impregnation fluids are not distributed throughout the whole wood cross diameter, but just form a protected zone (‘shell-treatment’) of some millimetres or centimetres. The depth of the protected zone depends on wood species and treatment process. While ‘shell-treatments’ might be adequate to achieve a sufficient protection against fungal decay by treatment with biocides, the effect on how wood treated by chemical wood modification systems performs with regard to the resistance against wood-destroying organisms, is not yet known.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Emmerich, Lukas and Strohbusch, Sarah and Brischke, Christian and Bollmus, Susanne and Militz, Holger},\n\tmonth = may,\n\tyear = {2019},\n\tpages = {18},\n}\n\n
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\n Over the last decades, chemical wood modification technologies were developed to increase the resistance against attack by wood-destroying organisms without using biocides. Most of those technologies are based on an impregnation step initially. In most treated wood products, mainly by using solid wood in thicker dimensions as in posts, poles, sleepers, deckings etc. it is known that wood impregnation fluids are not distributed throughout the whole wood cross diameter, but just form a protected zone (‘shell-treatment’) of some millimetres or centimetres. The depth of the protected zone depends on wood species and treatment process. While ‘shell-treatments’ might be adequate to achieve a sufficient protection against fungal decay by treatment with biocides, the effect on how wood treated by chemical wood modification systems performs with regard to the resistance against wood-destroying organisms, is not yet known.\n
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\n \n\n \n \n \n \n \n Quantifying the effect of microclimatic parameters on the moisture-induced decay risk of wooden structures.\n \n \n \n\n\n \n Emmerich, L.; and Brischke, C.\n\n\n \n\n\n\n In Proceedings IRG Annual Meeting, pages 16, Quebec City, Quebec, Canada, May 2019. \n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{emmerich_quantifying_2019,\n\taddress = {Quebec City, Quebec, Canada},\n\ttitle = {Quantifying the effect of microclimatic parameters on the moisture-induced decay risk of wooden structures},\n\tdoi = {IRG/WP 19-20649},\n\tabstract = {Wood exposed outdoors is prone to fungal degradation. Besides its material-inherent resistance, numerous factors are impacting on its service life with both, climate and design having a major effect. In addition, topography, shading, wind barriers, and other local parameters have an effect on the microclimatic conditions at site and therefore need to be quantified for service life prediction of wooden structures. Within this study we monitored differently severe exposed wooden components, which were implemented in hunting towers serving as test objects on a small but topographically divergent area.},\n\tlanguage = {en},\n\tbooktitle = {Proceedings {IRG} {Annual} {Meeting}},\n\tauthor = {Emmerich, Lukas and Brischke, Christian},\n\tmonth = may,\n\tyear = {2019},\n\tpages = {16},\n}\n\n
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\n Wood exposed outdoors is prone to fungal degradation. Besides its material-inherent resistance, numerous factors are impacting on its service life with both, climate and design having a major effect. In addition, topography, shading, wind barriers, and other local parameters have an effect on the microclimatic conditions at site and therefore need to be quantified for service life prediction of wooden structures. Within this study we monitored differently severe exposed wooden components, which were implemented in hunting towers serving as test objects on a small but topographically divergent area.\n
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\n \n\n \n \n \n \n \n New insight regarding the mode of action of cyclic n-methylolcompounds in wood.\n \n \n \n\n\n \n Emmerich, L.; Altgen, M.; Rautkari, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of the 15th Annual Meeting of the Northern European Network on Wood Science and Engineering (WSE), pages 110–112, Lund, Sweden, October 2019. \n \n\n\n\n
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@inproceedings{emmerich_new_2019,\n\taddress = {Lund, Sweden},\n\ttitle = {New insight regarding the mode of action of cyclic n-methylolcompounds in wood},\n\tbooktitle = {Proceedings of the 15th {Annual} {Meeting} of the {Northern} {European} {Network} on {Wood} {Science} and {Engineering} ({WSE})},\n\tauthor = {Emmerich, L. and Altgen, M. and Rautkari, L. and Militz, H.},\n\tmonth = oct,\n\tyear = {2019},\n\tpages = {110--112},\n}\n\n
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\n \n\n \n \n \n \n \n \n Analysis of Economic Feasibility of Ash and Maple Lamella Production for Glued Laminated Timber.\n \n \n \n \n\n\n \n Schlotzhauer, P.; Kovryga, A.; Emmerich, L.; Bollmus, S.; Van de Kuilen, J.; and Militz, H.\n\n\n \n\n\n\n Forests, 10(7): 529. July 2019.\n \n\n\n\n
\n\n\n\n \n \n \"AnalysisPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{schlotzhauer_analysis_2019,\n\ttitle = {Analysis of {Economic} {Feasibility} of {Ash} and {Maple} {Lamella} {Production} for {Glued} {Laminated} {Timber}},\n\tvolume = {10},\n\tcopyright = {http://creativecommons.org/licenses/by/3.0/},\n\turl = {https://www.mdpi.com/1999-4907/10/7/529},\n\tdoi = {10.3390/f10070529},\n\tabstract = {Background and Objectives: In the near future, in Europe a raised availability of hardwoods is expected. One possible sales market is the building sector, where medium dense European hardwoods could be used as load bearing elements. For the hardwood species beech, oak, and sweet chestnut technical building approvals already allow the production of hardwood glulam. For the species maple and ash this is not possible yet. This paper aims to evaluate the economic feasibility of glulam production from low dimension ash and maple timber from thinnings. Therefore, round wood qualities and the resulting lumber qualities are assessed and final as well as intermediate yields are calculated. Materials and Methods: 81 maple logs and 79 ash logs cut from trees from thinning operations in mixed (beech) forest stands were visually graded, cant sawn, and turned into strength-graded glulam lamellas. The volume yield of each production step was calculated. Results: The highest volume yield losses occur during milling of round wood (around 50\\%) and \\&ldquo;presorting and planning\\&rdquo; the dried lumber (56\\&ndash;60\\%). Strength grading is another key process in the production process. When grading according to DIN 4074-5 (2008), another 40\\&ndash;50\\% volume loss is reported, while combined visual and machine grading only produces 7\\&ndash;15\\% rejects. Conclusions: Yield raise potentials were identified especially in the production steps milling, presorting and planning and strength grading.},\n\tlanguage = {en},\n\tnumber = {7},\n\turldate = {2019-06-26},\n\tjournal = {Forests},\n\tauthor = {Schlotzhauer, Philipp and Kovryga, Andriy and Emmerich, Lukas and Bollmus, Susanne and Van de Kuilen, Jan-Willem and Militz, Holger},\n\tmonth = jul,\n\tyear = {2019},\n\tkeywords = {European hardwoods, glulam, low quality round wood, strength grading, volume yield},\n\tpages = {529},\n\tfile = {Full Text PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\A4HRNTQP\\\\Schlotzhauer et al. - 2019 - Analysis of Economic Feasibility of Ash and Maple .pdf:application/pdf;Snapshot:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\VH2KH8NV\\\\529.html:text/html},\n}\n\n
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\n Background and Objectives: In the near future, in Europe a raised availability of hardwoods is expected. One possible sales market is the building sector, where medium dense European hardwoods could be used as load bearing elements. For the hardwood species beech, oak, and sweet chestnut technical building approvals already allow the production of hardwood glulam. For the species maple and ash this is not possible yet. This paper aims to evaluate the economic feasibility of glulam production from low dimension ash and maple timber from thinnings. Therefore, round wood qualities and the resulting lumber qualities are assessed and final as well as intermediate yields are calculated. Materials and Methods: 81 maple logs and 79 ash logs cut from trees from thinning operations in mixed (beech) forest stands were visually graded, cant sawn, and turned into strength-graded glulam lamellas. The volume yield of each production step was calculated. Results: The highest volume yield losses occur during milling of round wood (around 50%) and “presorting and planning” the dried lumber (56–60%). Strength grading is another key process in the production process. When grading according to DIN 4074-5 (2008), another 40–50% volume loss is reported, while combined visual and machine grading only produces 7–15% rejects. Conclusions: Yield raise potentials were identified especially in the production steps milling, presorting and planning and strength grading.\n
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\n \n\n \n \n \n \n \n Holzterrassen - In Zukunft mit Mindesthaltbarkeit?.\n \n \n \n\n\n \n Brischke, C.; Militz, H.; and Emmerich, L.\n\n\n \n\n\n\n DEGA Galabau, 5: 41–43. 2019.\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{brischke_holzterrassen_2019,\n\ttitle = {Holzterrassen - {In} {Zukunft} mit {Mindesthaltbarkeit}?},\n\tvolume = {5},\n\tabstract = {Dass die Haltbarkeit eines Holzbauwerks von der Holzart abhängig ist, ist bekannt. Dafür stehen die Dauerhaftigkeitsklassen. Die Abteilung Holzbiologie und Holzprodukte der Universität Göttingen will in Zukunft sogar Gebrauchsdauervorhersagen in Jahren machen können. Hier ist schon mal eine\nVorschau auf das Rechenmodell.},\n\tlanguage = {deutsch},\n\tjournal = {DEGA Galabau},\n\tauthor = {Brischke, Christian and Militz, Holger and Emmerich, Lukas},\n\tyear = {2019},\n\tpages = {41--43},\n\tfile = {Brischke et al. - 2019 - Holzterrassen - In Zukunft mit Mindesthaltbarkeit.PDF:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\8JZLPT2J\\\\Brischke et al. - 2019 - Holzterrassen - In Zukunft mit Mindesthaltbarkeit.PDF:application/pdf;DEGA-GaLaBau-PSL-Terrassen-Brischke-19-03-14_NjEyNTMzNg-1.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\KTYDVKCY\\\\DEGA-GaLaBau-PSL-Terrassen-Brischke-19-03-14_NjEyNTMzNg-1.pdf:application/pdf},\n}\n\n
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\n Dass die Haltbarkeit eines Holzbauwerks von der Holzart abhängig ist, ist bekannt. Dafür stehen die Dauerhaftigkeitsklassen. Die Abteilung Holzbiologie und Holzprodukte der Universität Göttingen will in Zukunft sogar Gebrauchsdauervorhersagen in Jahren machen können. Hier ist schon mal eine Vorschau auf das Rechenmodell.\n
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\n \n\n \n \n \n \n \n Untersuchung zum Vermögen holzzerstörender Pilze, chemisch modifiziertes Holz zu durchwachsen.\n \n \n \n\n\n \n Strohbusch, S.; Brischke, C.; Bollmus, S.; Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Deutsche Holzschutztagung, pages 127–145, Dresden, Germany, April 2019. \n \n\n\n\n
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@inproceedings{strohbusch_untersuchung_2019,\n\taddress = {Dresden, Germany},\n\ttitle = {Untersuchung zum {Vermögen} holzzerstörender {Pilze}, chemisch modifiziertes {Holz} zu durchwachsen},\n\tlanguage = {deutsch},\n\tbooktitle = {Deutsche {Holzschutztagung}},\n\tauthor = {Strohbusch, Sarah and Brischke, Christian and Bollmus, Susanne and Emmerich, Lukas and Militz, Holger},\n\tmonth = apr,\n\tyear = {2019},\n\tpages = {127--145},\n\tfile = {Strohbusch et al. - 2019 - Untersuchung zum Vermögen holzzerstörender Pilze, .pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\IVSEFR2T\\\\Strohbusch et al. - 2019 - Untersuchung zum Vermögen holzzerstörender Pilze, .pdf:application/pdf;Untersuchung zum Vermögen holzzerstörender Pilze chemisch modifiziertes Holz zu durchwachsen.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\B9ENX7YH\\\\Untersuchung zum Vermögen holzzerstörender Pilze chemisch modifiziertes Holz zu durchwachsen.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n \n Wood modification with DMDHEU (1.3-dimethylol-4.5-dihydroxyethyleneurea) – State of the art, recent research activities and future perspectives.\n \n \n \n \n\n\n \n Emmerich, L.; Bollmus, S.; and Militz, H.\n\n\n \n\n\n\n Wood Material Science & Engineering, 14(1): 3–18. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"WoodPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{emmerich_wood_2019,\n\ttitle = {Wood modification with {DMDHEU} (1.3-dimethylol-4.5-dihydroxyethyleneurea) – {State} of the art, recent research activities and future perspectives},\n\tvolume = {14},\n\tissn = {1748-0272, 1748-0280},\n\turl = {https://www.tandfonline.com/doi/full/10.1080/17480272.2017.1417907},\n\tdoi = {10.1080/17480272.2017.1417907},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2018-11-26},\n\tjournal = {Wood Material Science \\& Engineering},\n\tauthor = {Emmerich, Lukas and Bollmus, Susanne and Militz, Holger},\n\tyear = {2019},\n\tpages = {3--18},\n\tfile = {Emmerich et al. - 2019 - Wood modification with DMDHEU (1.3-dimethylol-4.5-.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\QN3F33YZ\\\\Emmerich et al. - 2017 - Wood modification with DMDHEU (1.3-dimethylol-4.5-.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n \n Biological Durability of Sapling-Wood Products Used for Gardening and Outdoor Decoration.\n \n \n \n \n\n\n \n Brischke, C.; Emmerich, L.; Nienaber, D. G.; and Bollmus, S.\n\n\n \n\n\n\n Forests, 10(12): 1152. December 2019.\n \n\n\n\n
\n\n\n\n \n \n \"BiologicalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{brischke_biological_2019,\n\ttitle = {Biological {Durability} of {Sapling}-{Wood} {Products} {Used} for {Gardening} and {Outdoor} {Decoration}},\n\tvolume = {10},\n\tissn = {1999-4907},\n\turl = {https://www.mdpi.com/1999-4907/10/12/1152},\n\tdoi = {10.3390/f10121152},\n\tabstract = {Sapling-wood products from different wood species such as willow (Salix spp. L.) and Common hazel (Corylus avellana L.) are frequently used for gardening and outdoor decoration purposes. Remaining bark is suggested to provide additional biological durability. Even for temporary outdoor use it seemed questionable that durability of juvenile sapwood can provide acceptably long service lives of horticultural products. Therefore, sapling-wood from seven European-grown wood species was submitted to laboratory and field durability tests. In field tests, specimens with and without bark were tested in comparison and submitted to differently severe exposure situations, i.e., in-ground contact, and above-ground situations with and without water trapping. All materials under test were classified ‘not durable’ independently from any potential protective effect of remaining bark, which contradicted their suitability for outdoor applications if multi-annual use is desired.},\n\tlanguage = {en},\n\tnumber = {12},\n\turldate = {2020-06-02},\n\tjournal = {Forests},\n\tauthor = {Brischke, Christian and Emmerich, Lukas and Nienaber, Dirk G.B. and Bollmus, Susanne},\n\tmonth = dec,\n\tyear = {2019},\n\tkeywords = {fungal decay, basidiomycetes, resistance, sapwood, juvenile wood, horticulture},\n\tpages = {1152},\n\tfile = {Brischke et al. - 2019 - Biological Durability of Sapling-Wood Products Use.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\B75DUAGD\\\\Brischke et al. - 2019 - Biological Durability of Sapling-Wood Products Use.pdf:application/pdf;Brischke et al. - 2019 - Biological Durability of Sapling-Wood Products Use.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\DSANIDGK\\\\Brischke et al. - 2019 - Biological Durability of Sapling-Wood Products Use.pdf:application/pdf;Volltext:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\CFB7ASKF\\\\Brischke et al. - 2019 - Biological Durability of Sapling-Wood Products Use.pdf:application/pdf;Volltext:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\X3QSLSLI\\\\Brischke et al. - 2019 - Biological Durability of Sapling-Wood Products Use.pdf:application/pdf},\n}\n\n
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\n Sapling-wood products from different wood species such as willow (Salix spp. L.) and Common hazel (Corylus avellana L.) are frequently used for gardening and outdoor decoration purposes. Remaining bark is suggested to provide additional biological durability. Even for temporary outdoor use it seemed questionable that durability of juvenile sapwood can provide acceptably long service lives of horticultural products. Therefore, sapling-wood from seven European-grown wood species was submitted to laboratory and field durability tests. In field tests, specimens with and without bark were tested in comparison and submitted to differently severe exposure situations, i.e., in-ground contact, and above-ground situations with and without water trapping. All materials under test were classified ‘not durable’ independently from any potential protective effect of remaining bark, which contradicted their suitability for outdoor applications if multi-annual use is desired.\n
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\n \n\n \n \n \n \n \n The impact of anatomical characteristics on the structural integrity of wood.\n \n \n \n\n\n \n Emmerich, L.; Wülfing, G.; and Brischke, C.\n\n\n \n\n\n\n Forests, 10: 199. 2019.\n \n\n\n\n
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@article{emmerich_impact_2019,\n\ttitle = {The impact of anatomical characteristics on the structural integrity of wood},\n\tvolume = {10},\n\tdoi = {10.3390/f10020199},\n\tjournal = {Forests},\n\tauthor = {Emmerich, L. and Wülfing, G. and Brischke, C.},\n\tyear = {2019},\n\tpages = {199},\n}\n\n
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\n  \n 2018\n \n \n (9)\n \n \n
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\n \n\n \n \n \n \n \n Wood modification in Germany.\n \n \n \n\n\n \n Militz, H; and Emmerich, L.\n\n\n \n\n\n\n In Wood modification in Europe: processes, products, applications, Florence, Italy, 2018. \n \n\n\n\n
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@inproceedings{militz_wood_2018,\n\taddress = {Florence, Italy},\n\ttitle = {Wood modification in {Germany}},\n\tbooktitle = {Wood modification in {Europe}: processes, products, applications},\n\tauthor = {Militz, H and Emmerich, L.},\n\tyear = {2018},\n}\n\n
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\n \n\n \n \n \n \n \n Wie lange halten Holzkonstruktionen im Außenbereich? Wechselspiel zwischen Materialresistenz und äußeren Einflussfaktoren - Instrumentarium verfügbar für Gebrauchsdauervorhersage.\n \n \n \n\n\n \n Brischke, C.; Emmerich, L.; Frühwald Hansson, E.; Meyer-Veltrup, L.; and Niklewski, J.\n\n\n \n\n\n\n Holz-Zentralblatt, 22: 522–523. 2018.\n \n\n\n\n
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@article{brischke_wie_2018,\n\ttitle = {Wie lange halten {Holzkonstruktionen} im {Außenbereich}? {Wechselspiel} zwischen {Materialresistenz} und äußeren {Einflussfaktoren} - {Instrumentarium} verfügbar für {Gebrauchsdauervorhersage}},\n\tvolume = {22},\n\tlanguage = {de},\n\tjournal = {Holz-Zentralblatt},\n\tauthor = {Brischke, C. and Emmerich, L. and Frühwald Hansson, E. and Meyer-Veltrup, L. and Niklewski, J.},\n\tyear = {2018},\n\tkeywords = {Außenbereich, Dauerhaftigkeit, Holz, Holzkonstruktionen, Normung, Pilzabbau},\n\tpages = {522--523},\n}\n\n
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\n \n\n \n \n \n \n \n Resistance of modified wood to termite attack assessed in laboratory and field testing: A review of internal research.\n \n \n \n\n\n \n Emmerich, L.; Gascón-Garrido, P.; and Militz, H\n\n\n \n\n\n\n In pages 1–25, Johannesburg, South Africa, 2018. \n \n\n\n\n
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@inproceedings{emmerich_resistance_2018,\n\taddress = {Johannesburg, South Africa},\n\ttitle = {Resistance of modified wood to termite attack assessed in laboratory and field testing: {A} review of internal research},\n\tdoi = {IRG/WP 18-40824},\n\tauthor = {Emmerich, L. and Gascón-Garrido, P. and Militz, H},\n\tyear = {2018},\n\tpages = {1--25},\n\tfile = {Emmerich et al. - 2018 - Resistance of modified wood to termite attack asse.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\DMFYCEQ3\\\\Emmerich et al. - 2018 - Resistance of modified wood to termite attack asse.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n Long-term performance of DMDHEU-treated wood exposed in ground, above ground and in the marine environment.\n \n \n \n\n\n \n Emmerich, L.; Militz, H; and Brischke, C.\n\n\n \n\n\n\n In pages 1–30, Johannesburg, South Africa, 2018. \n \n\n\n\n
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@inproceedings{emmerich_long-term_2018,\n\taddress = {Johannesburg, South Africa},\n\ttitle = {Long-term performance of {DMDHEU}-treated wood exposed in ground, above ground and in the marine environment},\n\tdoi = {IRG/WP 18-40825},\n\tauthor = {Emmerich, L. and Militz, H and Brischke, C.},\n\tyear = {2018},\n\tpages = {1--30},\n}\n\n
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\n \n\n \n \n \n \n \n Wood modification with DMDHEU (1.3-dimethylol-4.5-dihydroxyethyleneurea) – Status quo and latest research activities.\n \n \n \n\n\n \n Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of 9th European Conference on Wood Modification, pages 1–8, Arnhem, Netherlands, 2018. \n \n\n\n\n
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@inproceedings{emmerich_wood_2018,\n\taddress = {Arnhem, Netherlands},\n\ttitle = {Wood modification with {DMDHEU} (1.3-dimethylol-4.5-dihydroxyethyleneurea) – {Status} quo and latest research activities},\n\tbooktitle = {Proceedings of 9th {European} {Conference} on {Wood} {Modification}},\n\tauthor = {Emmerich, L. and Militz, H.},\n\tyear = {2018},\n\tpages = {1--8},\n\tfile = {Emmerich und Militz - 2018 - Wood modification with DMDHEU (1.3-dimethylol-4.5-.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\NVX4MYVJ\\\\Emmerich und Militz - 2018 - Wood modification with DMDHEU (1.3-dimethylol-4.5-.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n Effect of DMDHEU modification on physical and mechanical properties of top-layer lamellas for multi-layer parquet flooring.\n \n \n \n\n\n \n Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Proceedings of 9th European Conference on Wood Modification, pages 1–8, Arnhem, Netherlands, 2018. \n \n\n\n\n
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@inproceedings{emmerich_effect_2018,\n\taddress = {Arnhem, Netherlands},\n\ttitle = {Effect of {DMDHEU} modification on physical and mechanical properties of top-layer lamellas for multi-layer parquet flooring},\n\tbooktitle = {Proceedings of 9th {European} {Conference} on {Wood} {Modification}},\n\tauthor = {Emmerich, L. and Militz, H.},\n\tyear = {2018},\n\tpages = {1--8},\n}\n\n
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\n \n\n \n \n \n \n \n \n Changes in sorption and electrical properties of wood caused by fungal decay.\n \n \n \n \n\n\n \n Brischke, C.; Stricker, S.; Meyer-Veltrup, L.; and Emmerich, L.\n\n\n \n\n\n\n Holzforschung,1–11. December 2018.\n \n\n\n\n
\n\n\n\n \n \n \"ChangesPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{brischke_changes_2018,\n\ttitle = {Changes in sorption and electrical properties of wood caused by fungal decay},\n\tissn = {1437-434X, 0018-3830},\n\turl = {http://www.degruyter.com/view/j/hfsg.ahead-of-print/hf-2018-0171/hf-2018-0171.xml},\n\tdoi = {10.1515/hf-2018-0171},\n\turldate = {2019-01-10},\n\tjournal = {Holzforschung},\n\tauthor = {Brischke, Christian and Stricker, Simon and Meyer-Veltrup, Linda and Emmerich, Lukas},\n\tmonth = dec,\n\tyear = {2018},\n\tpages = {1--11},\n\tfile = {Brischke et al. - 2018 - Changes in sorption and electrical properties of w.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\T9DJJSAS\\\\Brischke et al. - 2018 - Changes in sorption and electrical properties of w.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n Added value and utilization of untreated and heat-treated poplar (Populus spp. L.) with and without treatment with N-methylol compounds.\n \n \n \n\n\n \n Emmerich, L.; and Militz, H.\n\n\n \n\n\n\n In Németh, R.; Teischinger, A.; Rademacher, P.; and Bak, M., editor(s), Proceedings of the 8th Hardwood Conference, pages 105–106, Sopron, Hungary, 2018. \n \n\n\n\n
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@inproceedings{emmerich_added_2018,\n\taddress = {Sopron, Hungary},\n\ttitle = {Added value and utilization of untreated and heat-treated poplar ({Populus} spp. {L}.) with and without treatment with {N}-methylol compounds.},\n\tbooktitle = {Proceedings of the 8th {Hardwood} {Conference}},\n\tauthor = {Emmerich, L. and Militz, H.},\n\teditor = {Németh, R. and Teischinger, A. and Rademacher, P. and Bak, M.},\n\tyear = {2018},\n\tpages = {105--106},\n}\n\n
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\n \n\n \n \n \n \n \n How fungal decay affects electrical wood moisture content measurements.\n \n \n \n\n\n \n Brischke, C.; Stricker, S.; Emmerich, L.; and Meyer-Veltrup, L.\n\n\n \n\n\n\n In Kallakas, H., editor(s), Proceedings of the 14th annual meeting of the Northern European Network for Wood Science and Engineering (WSE2018), pages 10–12, Tallinn, Estonia, October 2018. \n \n\n\n\n
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@inproceedings{brischke_how_2018,\n\taddress = {Tallinn, Estonia},\n\ttitle = {How fungal decay affects electrical wood moisture content measurements},\n\tbooktitle = {Proceedings of the 14th annual meeting of the {Northern} {European} {Network} for {Wood} {Science} and {Engineering} ({WSE2018})},\n\tauthor = {Brischke, C. and Stricker, S. and Emmerich, L. and Meyer-Veltrup, L.},\n\teditor = {Kallakas, H.},\n\tmonth = oct,\n\tyear = {2018},\n\tpages = {10--12},\n\tfile = {Bicke et al. - 2018 - Resistance of PF-treated LVL from European beech (.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\VECAHGLQ\\\\Bicke et al. - 2018 - Resistance of PF-treated LVL from European beech (.pdf:application/pdf},\n}\n\n
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\n  \n 2017\n \n \n (3)\n \n \n
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\n \n\n \n \n \n \n \n Wood modification with DMDHEU – State of the art, recent research activities and future perspectives.\n \n \n \n\n\n \n Emmerich, L.; Bollmus, S.; and Militz, H\n\n\n \n\n\n\n In Building with bio-based materials: Best practice and performance specification. COST Action FP1303, 2017. \n \n\n\n\n
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@inproceedings{emmerich_wood_2017,\n\ttitle = {Wood modification with {DMDHEU} – {State} of the art, recent research activities and future perspectives},\n\tbooktitle = {Building with bio-based materials: {Best} practice and performance specification. {COST} {Action} {FP1303}},\n\tauthor = {Emmerich, L. and Bollmus, S. and Militz, H},\n\tyear = {2017},\n}\n\n
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\n \n\n \n \n \n \n \n Wood modification with N-methylol compounds – Effects of modification agent and process conditions.\n \n \n \n\n\n \n Emmerich, L.; Bollmus, S.; and Militz, H\n\n\n \n\n\n\n In Wood modification research & applications, Kuchl, Austria, 2017. \n \n\n\n\n
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@inproceedings{emmerich_wood_2017-1,\n\taddress = {Kuchl, Austria},\n\ttitle = {Wood modification with {N}-methylol compounds – {Effects} of modification agent and process conditions},\n\tbooktitle = {Wood modification research \\& applications},\n\tauthor = {Emmerich, L. and Bollmus, S. and Militz, H},\n\tyear = {2017},\n}\n\n
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\n \n\n \n \n \n \n \n Evaluation of surface cracks on wood – physical assessment versus subjective sensation.\n \n \n \n\n\n \n Gellerich, A.; Brischke, C.; Emmerich, L.; Meyer-Veltrup, L.; and Kaudewitz, P.\n\n\n \n\n\n\n In The International Research Group on Wood Protection IRG/WP, pages 1–16, Stockholm, Schweden, 2017. \n \n\n\n\n
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@inproceedings{gellerich_evaluation_2017,\n\taddress = {Stockholm, Schweden},\n\ttitle = {Evaluation of surface cracks on wood – physical assessment versus subjective sensation},\n\tdoi = {IRG/WP 17-20617},\n\tbooktitle = {The {International} {Research} {Group} on {Wood} {Protection} {IRG}/{WP}},\n\tauthor = {Gellerich, Antje and Brischke, Christian and Emmerich, Lukas and Meyer-Veltrup, Linda and Kaudewitz, Philipp},\n\tyear = {2017},\n\tpages = {1--16},\n\tfile = {Gellerich et al. - 2017 - Evaluation of surface cracks on wood – physical as.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\LEMTLLR4\\\\Gellerich et al. - 2017 - Evaluation of surface cracks on wood – physical as.pdf:application/pdf},\n}\n\n
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\n  \n 2016\n \n \n (2)\n \n \n
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\n \n\n \n \n \n \n \n Holzmodifizierung von Kiefer (Pinus sylvestris L.) mit DMDHEU und modifizierten DMDHEU-Varianten im Vergleich.\n \n \n \n\n\n \n Emmerich, L.\n\n\n \n\n\n\n Technical Report Fakultät für Forstwissenschaften und Waldökologie der Georg- August Universität Göttingen Abteilung Holzbiologie und Holzprodukte, Göttingen, 2016.\n \n\n\n\n
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@techreport{emmerich_holzmodifizierung_2016,\n\taddress = {Göttingen},\n\ttype = {Masterarbeit},\n\ttitle = {Holzmodifizierung von {Kiefer} ({Pinus} sylvestris {L}.) mit {DMDHEU} und modifizierten {DMDHEU}-{Varianten} im {Vergleich}},\n\tlanguage = {de},\n\tinstitution = {Fakultät für Forstwissenschaften und Waldökologie der Georg- August Universität Göttingen Abteilung Holzbiologie und Holzprodukte},\n\tauthor = {Emmerich, Lukas},\n\tyear = {2016},\n\tpages = {225},\n\tfile = {Emmerich - 2016 - Holzmodifizierung von Kiefer (Pinus sylvestris L.).pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\ZRA6QDL9\\\\Emmerich - 2016 - Holzmodifizierung von Kiefer (Pinus sylvestris L.).pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n Untersuchungen zur Schnittholzausbeute von Ahorn- und Eschenlangholzabschnitten zur Bereitstellung von Rohlamellen für die Produktion von Brettschichtholz.\n \n \n \n\n\n \n Emmerich, L.\n\n\n \n\n\n\n Technical Report Georg-August-Universität Göttingen, Fakultät für Forstwissenschaften und Waldökologie, Abteilung Holzbiologie und Holzprodukte, Göttingen, 2016.\n Prüfer: Prof. Dr. Holger Militz Betreuung: Dr. Susanne Bollmus M.Sc. Philipp Schlotzhauer\n\n\n\n
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@techreport{emmerich_untersuchungen_2016,\n\taddress = {Göttingen},\n\ttype = {Projektarbeit},\n\ttitle = {Untersuchungen zur {Schnittholzausbeute} von {Ahorn}- und {Eschenlangholzabschnitten} zur {Bereitstellung} von {Rohlamellen} für die {Produktion} von {Brettschichtholz}},\n\tlanguage = {de},\n\tinstitution = {Georg-August-Universität Göttingen, Fakultät für Forstwissenschaften und Waldökologie, Abteilung Holzbiologie und Holzprodukte},\n\tauthor = {Emmerich, Lukas},\n\tyear = {2016},\n\tnote = {Prüfer: Prof. Dr. Holger Militz\nBetreuung: Dr. Susanne Bollmus\n                   M.Sc. Philipp Schlotzhauer},\n\tfile = {Emmerich - 2016 - Untersuchungen zur Schnittholzausbeute von Ahorn- .pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\K2ZN89NW\\\\Emmerich - 2016 - Untersuchungen zur Schnittholzausbeute von Ahorn- .pdf:application/pdf},\n}\n\n
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\n  \n 2014\n \n \n (2)\n \n \n
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\n \n\n \n \n \n \n \n Machine grain angle determination on six European hardwoods.\n \n \n \n\n\n \n Schlotzhauer, P.; Emmerich, L.; Militz, H.; and Bollmus, S.\n\n\n \n\n\n\n In Németh, R.; Teischinger, A.; and Schmitt, U., editor(s), pages 45–46, 2014. \n \n\n\n\n
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@inproceedings{nemeth_machine_2014,\n\ttitle = {Machine grain angle determination on six {European} hardwoods},\n\tshorttitle = {Machine grain angle determination on six {European} hardwoods},\n\tauthor = {Schlotzhauer, P. and Emmerich, L. and Militz, H. and Bollmus, S.},\n\teditor = {Németh, R. and Teischinger, A. and Schmitt, U.},\n\tyear = {2014},\n\tpages = {45--46},\n\tfile = {Proceedings_Eco-efficient Resource Wood_2014_Sopron_Vienna_final:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\MITT2ZZF\\\\Proceedings_Eco-efficient Resource Wood_2014_Sopron_Vienna_final.pdf:application/pdf},\n}\n\n
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\n \n\n \n \n \n \n \n Vergleichende Untersuchungen zur Bestimmung des Faserverlaufes von Laubholzlamellen.\n \n \n \n\n\n \n Emmerich, L.\n\n\n \n\n\n\n Technical Report Georg-August-Universität Göttingen, Fakultät für Forstwissenschaften und Waldökologie, Abteilung Holzbiologie und Holzprodukte, 2014.\n \n\n\n\n
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@techreport{emmerich_vergleichende_2014,\n\ttype = {Bachelorarbeit},\n\ttitle = {Vergleichende {Untersuchungen} zur {Bestimmung} des {Faserverlaufes} von {Laubholzlamellen}},\n\tlanguage = {de},\n\tinstitution = {Georg-August-Universität Göttingen, Fakultät für Forstwissenschaften und Waldökologie, Abteilung Holzbiologie und Holzprodukte},\n\tauthor = {Emmerich, Lukas},\n\tyear = {2014},\n\tfile = {Emmerich - 2014 - Vergleichende Untersuchungen zur Bestimmung des Fa.pdf:C\\:\\\\Users\\\\Eva\\\\Zotero\\\\storage\\\\FP8WCTFD\\\\Emmerich - 2014 - Vergleichende Untersuchungen zur Bestimmung des Fa.pdf:application/pdf},\n}\n\n
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