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林产化学与工业 ›› 2009, Vol. 29 ›› Issue (1): 29-32.

• 研究报告 • 上一篇    下一篇

磨木木质素在硫酸盐法蒸煮过程中的降解及与木糖的缩合

邵震宇1, 谢益民1, 周燕2, 杨志勇2   

  1. 1. 山东轻工业学院, 制浆造纸科学与技术教育部重点实验室, 山东 济南, 250353;2. 潍坊科技职业学院, 化学工程学院, 山东 寿光, 262700
  • 收稿日期:2008-01-10 修回日期:1900-01-01 出版日期:2009-02-28 发布日期:2009-02-28
  • 通讯作者: 谢益民,教授,博士生导师,主要从事植物纤维资源化学和制浆化学研究;E-mail:ppymxie@sdili.eud.cn。

Degradation of Milled-wood Lignin and Its Condensation with Xylose during Kraft Cooking

SHAO Zhen-yu1, XIE Yi-min1, ZHOU Yan2, YANG Zhi-yong2   

  1. 1. Key Lab of Paper Science and Technology of Ministry of Education, Shandong Institute of Light Industry, Ji'nan 250353, China;2. Weifang Science and Technology Vocational College, Shouguang 262700, China
  • Received:2008-01-10 Revised:1900-01-01 Online:2009-02-28 Published:2009-02-28

摘要: 在木糖存在的条件下,采用硫酸盐法蒸煮对蓝花楹磨木木质素(MWL)进行处理,然后对处理后的产物进行红外光谱和13CNMR分析,研究蓝花楹MWL的结构变化,探讨在硫酸盐法蒸煮过程中木质素-碳水化合物复合体(LCC)的形成情况。研究发现:蓝花楹MWL结构单元之间的α-烷基芳基醚键、β-O-4型连接键很容易发生断裂,而在这些连接键发生断裂的同时,形成的木质素中间体与木糖通过化学键的结合,形成新的LCC结构。这种新形成的LCC结构主要是由β-O-4型木质素结构和5-5'缩合型木质素结构与木糖形成的以苯甲醚键连接的LCC,这种新形成的LCC结构对碱非常稳定。

关键词: 木质素-碳水化合物复合体, 磨木木质素, 木糖, 硫酸盐法蒸煮, 苯甲醚键

Abstract: Degradation and condensation of milled-wood lignin(MWL) from Jacaranda copaia Aubl.D.Don during kraft cooking in the presence of xylose was investigated. FT-IR and 13CNMRwere used to analyze the structure of the products from kraft cooking. The results indicated that lignin linkages were cleaved easily by kraft cooking, especially α-aryl ether linkages and β-O-4 linkages. New lignin-carbohydrate complexes(LCC) structures were found simultaneously during the breaking of lignin linkages. The newly formed LCC was originated from condensation between lignin intermediates and xylose,mainly from β-O-4 and 5-5' lignin structures, which were connected with xylose through benzyl ether linkage. In addition, this newly formed LCC was very stable against alkali.

Key words: lignin-carbohydrate complexes, milled-wood lignin, xylose, kraft cooking, benzyl ether linkage

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