摘要
本文研究了竹子原料及其磺化机浆 MWL 的结构特性,并把两者进行对比。发现竹料制成浆后,木素中的-OCH_3,侧链羧基含量降低,酚 OH 含量增加,木素发生了较大裂解,其分子量有很大减小,多分散性增大,木素中酯键连接的 H 单元制成浆后有部分水解,但木素中存在非酯(?)连接的 H 单元,它们即使在皂化后也不水解,残留于木素中的糖主要是阿拉伯糖木聚糖,也有一定量的甘露糖、半乳糖、葡萄糖。竹料制成浆后,木素残留糖中的甘露糖消失,葡萄糖有较大减小,说明残留糖中的木糖、阿拉伯糖、半乳糖与木素有较牢固的连接存在。
Structural Fcatures of lignins from bamboo and its SCMP in the article were studied,and compared each other,results obtained indicatde that after raw material changed pulp,-OCH_3,side chain carbonyl graoups dccrcased,phenolic hydroxyl increased;and the molceular weight of lignin become smaller,producing many low molecu- lar weight fractions;some H units linked with lignin by ester bonds were saponified in the course of pulping,however,some H units were unable to be saponified even treated with in sodium hydroxide solution,these H units were not linked with lignin by ester bonds,com- pared with raw materilas pulp lignin had less residual carbohydrates,and it's content changed,xylose increased,other materials decreased,and mannose practically disappeared completely,residual carbohydrates in lignin were mainly fragnents of arabinoxylans.
出处
《陕西科技大学学报（自然科学版）》
1993年第2期83-89,共7页
Journal of Shaanxi University of Science & Technology
