아세틸화처리 낙엽송(Larix kaempferi) 소형 각재의 치수안정성 조사

Investigation on the Dimensional Stability of Acetylated Larch (Larix kaempferi) Small Square

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 the specimens of domestic red and Korean pines are acety-lated in liquid phase and their physical properties, such as density, bending strength, anti-hygro-scopicity etc., are analyzed. Acetylation increases the average weights and volume of larch specimens by 11.4% and 3.4%, respectively, and their average oven-dry densities are increased by 0.03 g/cm3. Acetylation does not influence on Modulus of Rupture (MOR) and Modulus of Elasticity (MOE). The average Percentage Reduction in Hygroscopicity (PRH) and average Percentage Reduction in Water soaking (PRW) of larch specimens are respectively 20.2% and 20.8%. Thus it can be concluded that acetylation improves the dimensional stability of larch specimens.