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林业科学 ›› 1997, Vol. 33 ›› Issue (3): 252-258.

• 论文及研究报告 • 上一篇    下一篇

三聚氰胺-甲醛与木材的交联作用

方桂珍,李坚,刘一星,刘健威   

  1. 东北林业大学 哈尔滨 150040
  • 收稿日期:1995-10-30 出版日期:1997-05-25 发布日期:1997-05-25

CROSS—LINKING EFFECT BETWEEN WOOD AND MELAMINE-FORMALDEHYDE

Guizhen Fang,Jian Li,Yixing Liu,Jianwei Liu   

  1. Northeast Forestry University Harbin 150040
  • Received:1995-10-30 Online:1997-05-25 Published:1997-05-25

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。

关键词: 交联反应, 三聚氰胺-甲醛, 综纤维素, 纤维素, 木质素

Abstract:

To study the mechanism of reaction between wood and crosslinking agent in compressed 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.

Key words: Crosslinking reaction, Melamine-formaldehyde, Holocelluiose, Cellulose, Lignin