Effect of short-chain silicones bearing different functional groups on the resistance of pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) against decay fungi. Pries, M., Wagner, R., Kaesler, K., Militz, H., & Mai, C. Holzforschung, 67(4):447–454, 2013.
abstract   bibtex   
Blocks of pine sapwood and beech wood were treated with water-based emulsions containing short-chain silicones with different α-ω-bonded functional groups, such as diamino, carboxyl and carbonyl, betain, and epoxy groups. The weight percent gain upon treatment of the pine wood specimens was relatively high (10%–20%), but their cross-sectional bulking was low (1%–2.5%). Thus, the anti-shrink efficiency (ASE) due to the treatment was also low. The first water-submersion tests revealed some hydrophobation of the treated wood. A second submersion test, however, revealed successful hydrophobation only for betain-functionalised material. The carboxylated silicone even increased the speed of water uptake as compared to the controls. The samples treated with silicones bearing epoxy, diamino, and carboxy functionalities showed a distinct reduction in mass loss compared to the control samples after 16 weeks of incubation with the fungi Coniophora puteana and Trametes versicolor according to EN 113 and CEN/TS 15083-1, whereas the betain-functionalised silicone did not enhance fungal resistance. All silicones tested lowered the mass loss in a soft rot test according to ENv 807. The mode of action of the silicones is discussed.
@article{pries_effect_2013,
	title = {Effect of short-chain silicones bearing different functional groups on the resistance of pine ({Pinus} sylvestris {L}.) and beech ({Fagus} sylvatica {L}.) against decay fungi},
	volume = {67},
	shorttitle = {Effect of short-chain silicones bearing different functional groups on the resistance of pine ({Pinus} sylvestris {L}.) and beech ({Fagus} sylvatica {L}.) against decay fungi},
	abstract = {Blocks of pine sapwood and beech wood were treated with water-based emulsions containing short-chain silicones with different α-ω-bonded functional groups, such as diamino, carboxyl and carbonyl, betain, and epoxy groups. The weight percent gain upon treatment of the pine wood specimens was relatively high (10\%–20\%), but their cross-sectional bulking was low (1\%–2.5\%). Thus, the anti-shrink efficiency (ASE) due to the treatment was also low. The first water-submersion tests revealed some hydrophobation of the treated wood. A second submersion test, however, revealed successful hydrophobation only for betain-functionalised material. The carboxylated silicone even increased the speed of water uptake as compared to the controls. The samples treated with silicones bearing epoxy, diamino, and carboxy functionalities showed a distinct reduction in mass loss compared to the control samples after 16 weeks of incubation with the fungi Coniophora puteana and Trametes versicolor according to EN 113 and CEN/TS 15083-1, whereas the betain-functionalised silicone did not enhance fungal resistance. All silicones tested lowered the mass loss in a soft rot test according to ENv 807. The mode of action of the silicones is discussed.},
	number = {4},
	journal = {Holzforschung},
	author = {Pries, M. and Wagner, R. and Kaesler, K.-H. and Militz, H. and Mai, C.},
	year = {2013},
	keywords = {wood modification, amino silicone, carboxy silicone, epoxy silicone, short-chain silicone},
	pages = {447--454},
	file = {hf-2012-0065:C\:\\Users\\maicher\\Zotero\\storage\\KTFFHQ55\\hf-2012-0065.pdf:application/pdf},
}

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