Distinctive impact of processing techniques on bonding surfaces of acetylated and heat treated beech wood and its relation to bonding strength. Lütkemeier, B., Konnerth, J., & Militz, H. Forest Products Journal, 68(4):372–382, July, 2018.
Distinctive impact of processing techniques on bonding surfaces of acetylated and heat treated beech wood and its relation to bonding strength [link]Paper  doi  abstract   bibtex   
In this study, the tensile shear strength of untreated, acetylated and heat treated beech (Fagus sylvatica L.) wood joints was investigated as a function of different surficial processing techniques. It was hypothesized, that differentiating patterns of surface texture are induced by specific processing techniques directly affecting the bonding performance of adhered assemblies. Surface processing was implemented either by peripheral planing with sharp and dull knifes, respectively, or by sanding (P100). Process-dependent surface textures were visualized by scanning electron microscopy and a digital light microscope was applied to display the structural integrity of surficial wood tissues. In dependence on wood modification techniques, process-related patterns of surface texture were observed. Laser scanning data of surface morphology was used to derive area-related functional roughness parameters defining complex surface textures quantitatively. For tensile shear testing, lamellas were bonded either with a two-component melamine-urea-formaldehyde adhesive or with a one-component moisture-curing polyurethane adhesive. Single lap joint specimens following EN 302-1:2013 were prepared considering a material-adapted specimen geometry. Bonding strength was evaluated with respect to differentiating regimes of moisture. Specific dependences of modified beech wood properties on surface morphologies subsequent to surface processing and, therewith, on the associated bonding performance could be verified. As a result, universal relationships between bonding performance and surface processing technique could not be identified. Thus, individual studies of bonding performances in dependence on adherend- and processing-related surface textures are inevitable.
@article{lutkemeier_distinctive_2018,
	title = {Distinctive impact of processing techniques on bonding surfaces of acetylated and heat treated beech wood and its relation to bonding strength},
	volume = {68},
	issn = {0015-7473},
	url = {http://forestprodjournals.org/doi/abs/10.13073/FPJ-D-17-00077},
	doi = {10.13073/FPJ-D-17-00077},
	abstract = {In this study, the tensile shear strength of untreated, acetylated and heat treated beech (Fagus sylvatica L.) wood joints was investigated as a function of different surficial processing techniques. It was hypothesized, that differentiating patterns of surface texture are induced by specific processing techniques directly affecting the bonding performance of adhered assemblies. Surface processing was implemented either by peripheral planing with sharp and dull knifes, respectively, or by sanding (P100). Process-dependent surface textures were visualized by scanning electron microscopy and a digital light microscope was applied to display the structural integrity of surficial wood tissues. In dependence on wood modification techniques, process-related patterns of surface texture were observed. Laser scanning data of surface morphology was used to derive area-related functional roughness parameters defining complex surface textures quantitatively. For tensile shear testing, lamellas were bonded either with a two-component melamine-urea-formaldehyde adhesive or with a one-component moisture-curing polyurethane adhesive. Single lap joint specimens following EN 302-1:2013 were prepared considering a material-adapted specimen geometry. Bonding strength was evaluated with respect to differentiating regimes of moisture. Specific dependences of modified beech wood properties on surface morphologies subsequent to surface processing and, therewith, on the associated bonding performance could be verified. As a result, universal relationships between bonding performance and surface processing technique could not be identified. Thus, individual studies of bonding performances in dependence on adherend- and processing-related surface textures are inevitable.},
	number = {4},
	journal = {Forest Products Journal},
	author = {Lütkemeier, Bernd and Konnerth, Johannes and Militz, Holger},
	month = jul,
	year = {2018},
	pages = {372--382},
}

Downloads: 0