多元羧酸与木材交联反应对木材振动特性的影响

Infection in Vibrancy Efficiency of Wood by Crosslinking Reaction between Wood and Polycarboxylic Acids

采用以多元羧酸为酯化剂 ,以无机盐类为催化剂的交联体系 ,进行木材交联反应 ,这是一类新型、水溶性、无毒害、无污染的非甲醛系试剂交联体系。本文分析了化学改性木材的振动特性变化。结果表明 ,用不同质量分数 1,2 ,3,4 -丁烷基四甲酸 (BTCA)处理西加云杉和美国扁柏木材的振动性能有所变化 :2树种的损耗角正切tanδ在纵向和径向有所下降 ;比动态弹性模量E ρ在纵向变化均不明显 ,随着抗胀缩率ASE上升变化不规则 ;声辐射阻尼系数E ρ3的变化类似于比动态弹性模量E ρ的变化 ;纵向和径向的周期能量损耗参数tanδ E均下降。

Polycarboxylic acids acted as esterification agents and inorganic salts acted as catalyst in the research of wood crosslinking reaction. The vibrancy efficiency of treated wood were analyzed. The results showed that vibrancy efficiency of Picea sitchensis and Chamaecyparis iawsoniana. Reacted by 1,2,3,4-butanetetracarboxylic acid (BTCA) changed: loss tangent (tan δ) went down in longitudinal and radial,the changes of specific dynamic Youngs modules (E/ρ) were not distinct and abnormity with rise ofantiswelling efficiency(ASE)in the radial direction, the changes of acoustic radiation damping. E/ρ3 were similar to specific dynamic Youngs modules (E/ρ), the tan δ/E went down in longitudinal and radial.