竹材预水解过程木质素迁移行为研究

doi:10.3969/j.issn.0253-2417.2014.05.013

林产化学与工业 ›› 2014, Vol. 34 ›› Issue (5): 79-83.doi: 10.3969/j.issn.0253-2417.2014.05.013

竹材预水解过程木质素迁移行为研究

林玲, 曹石林, 马晓娟, 黄六莲, 罗小林, 陈礼辉

福建农林大学材料工程学院, 福建福州 350002

收稿日期:2013-07-02 出版日期:2014-10-25 发布日期:2015-08-18
作者简介:林玲（1988-），女，福建龙岩人，硕士生，研究方向为植物资源化学与材料
基金资助:
国家自然科学基金面上项目（31270638）；福建省自然科学基金项目（2012J01065）

Migration Behavior of Lignin during Bamboo Pre-hydrolysis

LIN Ling, CAO Shi-lin, MA Xiao-juan, HUANG Liu-lian, LUO Xiao-lin, CHEN Li-hui

College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China

Received:2013-07-02 Online:2014-10-25 Published:2015-08-18
Contact: 曹石林（1973-），副教授，硕士生导师，主要从事制浆造纸研究工作；E-mail：scutcsl@163.com E-mail:scutcsl@163.com

摘要/Abstract

摘要： 通过分析竹片在预水解过程中的表面形貌及化学组成变化，研究木质素在竹材水解过程中的迁移行为。结果表明，在竹片预水解过程中，竹片内部的木质素类物质会逐渐迁移至竹片的表层和表面。竹片表层物质的FT-IR图显示，木质素特征峰随着水解程度的提高不断增强，而半纤维素特征峰则逐渐消失；竹片表层物质的XPS图显示，水解至 120 min 时表层物质的C₁（C—C/C—H）含量较竹原料显著增加，从24.0 %上升至45.5 %，C₂（C—O）含量明显减小，从35.5 %下降至24.3 %，O/C从0.43降低至0.34；水解20 min时表层木质素含量略低于竹片平均木质素含量，超过20 min后表层木质素含量均高于竹片平均木质素含量，而且其差值逐渐上升，水解120 min时，表层木质素为43.3%，竹片平均木质素为26.5%。

关键词: 竹子, 预水解, 木质素, 迁移

Abstract: Understanding of the lignin migration behavior during bamboo pre-hydrolysis is essential for optimization of pre-hydrolysis technology and following cooking process. In this paper, the lignin migration behavior was investigated by Environment Scanning Electron Microscope (ESEM) and chemical composition analysis. The results showed that the interior lignin would gradually migrate to the bamboo surface. The infrared absorption characteristic peaks of lignin were enhanced while the peaks of hemicellulose were gradually disappeared during the pre-hydrolysis. The XPS analysis indicated that the C₁(C—C/C—H) content increased from 24.0% to 45.5%, while C₂(C—O)content decreased from 35.5% to 24.3% and the O/C ratio decreased from 0.43 to 0.34 as the bamboo was pre-hydrolyzed for 120 minutes. The higher lignin concentration was observed in the pretreated bamboo surface as compared to other raw material. The disparity between the lignin concentration of the whole bamboo and the lignin concentration of the bamboo surface increased with the pre-hydrolysis time, and lignin cocentration increased from 26.5 % to 43.3 % at the time of 120 min.

Key words: bamboo, pre-hydrolysis, lignin, migration

中图分类号:

TQ35

林玲, 曹石林, 马晓娟, 黄六莲, 罗小林, 陈礼辉. 竹材预水解过程木质素迁移行为研究[J]. 林产化学与工业, 2014, 34(5): 79-83.

LIN Ling, CAO Shi-lin, MA Xiao-juan, HUANG Liu-lian, LUO Xiao-lin, CHEN Li-hui. Migration Behavior of Lignin during Bamboo Pre-hydrolysis[J]. Chemistry and Industry of Forest Products, 2014, 34(5): 79-83.

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竹材预水解过程木质素迁移行为研究

Migration Behavior of Lignin during Bamboo Pre-hydrolysis

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