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作 者 ：方桂珍 李坚 刘一星 刘健威

期 刊 ：林业科学 1997年 33卷 3期 页码：252-258

关键词：交联反应；三聚氰胺-甲醛；综纤维素；纤维素；木质素；

Keywords:Crosslinking reaction, Melamine-formaldehyde, Holocelluiose, Cellulose, Lignin,

摘 要 ：为了研究木材压密化处理过程中交联试剂与木材的作用机理,以大青杨木材为试样,分离制得综纤维素、纤维素、α-纤维素、木质素和半纤维素,并分别与三聚氰胺-甲醛反应,测定了不同化学组分与交联剂作用的活性顺序及其分布。结果表明:三聚氰胺-甲醛与大青杨木材细胞壁组分的反应活性顺序为:木质素>半纤维素>综纤维素>α-纤维素>纤维素。还采用红外光谱(IR)对交联作用前后的综纤维素、纤维素和木质素的化学结构变化进行了分析,从而定性确定了交联化处理木材的主要官能团变化。

Abstract:To study the mechanism of reaction between wood and crosslinking agent in com- pressed wood, lignin, holocellulose, cellulose, α-cellulose and hemicellulose were isolated from populus ussuriensis and reacted with melamine-formaldehyde.The distribution and reactivity of reacted chemicals in wood cell wall components were determined. The order of reactivity was found to be lignin>hemicellulose>holocellulose>α-cellulose>cellulose.The chemical construction of holocellulose,cellulose and lignin before and after crosslinking reaction were analysed.Using infrared(IR) spectra,thus the changes of main chemical groups of modificated wood were qualitatively determined.

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