摘要
本文论述了马尾松、白桦和青杨三种木材的液相乙酰化条件及各种乙酰化木材的尺才稳定性和耐菌腐能力。以乙酸酐和二甲苯为处理液,反应的最佳条件是:温度120℃,时间7到11小时,乙酸酑与二甲苯配比1:1。当处理试样的增重到15%时,抗收缩率可达60%以上。增重为11.75—17.98%的不同处理试块,其耐菌腐能力可提高3—34倍。
This paper deals with some factors affecting on liquor phase acetylation of wood from three species (Pinus massoniana, Populus cathayana, Betuls platyphylla), and the dimension stability and decay resistance of acetylated wood. When acetic anhydride and xylene were used as treating liquorat the volume rate of 1' 1, the optimum reaction temperature was 120℃, and the reaction period was 7 to 11 hours. The antishrink efficiency of aeetylated wood could reach more than 60% when weight percent gain (WPC) was 15% or more The decay resistance of treated wood blocks with WPG of 11.75-17.98% was 3 to 34 times higher than that of the controls.
出处
《木材工业》
北大核心
1991年第4期20-24,共5页
China Wood Industry
关键词
木材
液相乙酰化
尺寸稳定性
处理
Liquor phase acetylation
Dimension stability
Antishrink efficiency
Decay resistance
