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http://dx.doi.org/10.5658/WOOD.2015.43.4.429

Investigation on the Physical Properties of Acetylated Domestic Softwoods  

Lee, Won-Hee (Department of Wood Science and Technology, Kyungpook National University)
Hong, Seung-Hyun (Department of Bio-based Materials, Chungnam National University)
Kang, Ho-Yang (Department of Bio-based Materials, Chungnam National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.43, no.4, 2015 , pp. 429-437 More about this Journal
Abstract
It has been known that acetylation improves the dimensional stability of wood. Liquid phase acetylation is more popular than gas-phase acetylation for the effectiveness of weight gain of wood. In this study domestic red and Korean pine specimens were liquid phase acetylated and their physical properties, such as density, bending strength, dimensional stability etc., were investigated. Acetylation increased the average weights of red and Korean pine specimens by 10.4% and 9.2%, respectively, and their average oven-dry densities were increased by 6.9% and 4.6%, respectively. Acetylation did not influence on modulus of rupture (MOR), modulus of elasticity (MOE) and dynamic MOE (DMOE). The average percentage reduction in hygroscopicity (PRH) of red and Korean pine specimens were respectively 20.6% and 13.8%, while the average percentage reduction in water soaking (PRW) were respectively 20.0% and 8.5%. Thus it can be concluded that the liquid acetylation improved the dimensional stability of red pine specimens more than that of Korean pine specimens.
Keywords
acetylation; dimensional stability; weight percentage gain; hygroscopicity; Pinus densiflora; Pinus koraiensis;
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