杨木自水解液中溶解木质素和胶体木质素的结构特征

doi:10.3969/j.issn.0253-2417.2017.04.009

林产化学与工业 ›› 2017, Vol. 37 ›› Issue (4): 59-66.doi: 10.3969/j.issn.0253-2417.2017.04.009

杨木自水解液中溶解木质素和胶体木质素的结构特征

王鹏¹, 秦影¹, 傅英娟¹, 王兆江¹, 张凤山²

1. 齐鲁工业大学制浆造纸科学与技术教育部重点实验室, 山东济南 250353;
2. 华泰集团有限公司, 山东东营 257335

收稿日期:2016-11-09 出版日期:2017-08-25 发布日期:2017-09-02
通讯作者: 傅英娟,教授,博士生导师,研究领域为生物质精炼技术;E-mail:fyingjuan@163.com E-mail:fyingjuan@163.com
作者简介:王鹏(1990-),男,山东维坊人,硕士,主要从事生物质精炼技术研究工作
基金资助:
国家自然科学基金资助项目（31540009；31370581）；山东省自主创新和成果转化项目（2014CGZH0302）

Structural Character of Dissolved and Colloidal Lignin in Hydrolysate from Poplar Woodchips Autohydrolysis

WANG Peng¹, QIN Ying¹, FU Yingjuan¹, WANG Zhaojiang¹, ZHANG Fengshan²

1. Key Laboratory of Pulp & Paper Science and Technology of the Ministry of Education, Qilu University of Technology, Jinan 250353, China;
2. Huatai Group Corp. Ltd., Dongying 257335, China

Received:2016-11-09 Online:2017-08-25 Published:2017-09-02

摘要/Abstract

摘要： 对不同水解强度下杨木预水解液中溶解木质素和胶体木质素（DCL）进行了分离、纯化和结构表征。结果表明：随着自水解温度的增加（T_max>170℃），杨木预水解液中DCL的缩合程度明显增加，与残留在杨木自水解木片中的木质素相比，预水解液中的DCL组分含有更少的脂肪族羟基、更多的缩合型酚羟基和非缩合型酚羟基，以及更高的S-OH/G-OH比率，表明预水解液中的木质素更易发生侧链脂肪族羟基的脱水反应、β-O-4的水解反应和木质素分子间的缩合反应。

关键词: 杨木, 自水解, 溶解木质素和胶体木质素, 结构表征, 木质素缩合

Abstract: The dissolved and colloidal lignin (DCL) under different autohydrolysis levels were isolated and purified from the poplar woodchips autohydrolysis liquor, and their structural features were characterized by series of instrumental analysis, i.e. Fourier transform infrared (FT-IR), ¹H,quantitative ¹³C, 2D HSQC, and ³¹P nuclear magnetic resonance (NMR) spectroscopies, and gel permeation chromatography/multi-angle laser light scattering (GPC-MALLS). The condensation of DCL in the poplar autohydrolysis liquor remarkably increased with increasing autohydrolysis temperature (T_max>170℃). Comparing with functional groups of the lignin in the autohydrolyzed poplar woodchips, the DCL had less aliphatic-OH groups, containing more condensed phenolic-OH and more non-condensed phenolic-OH groups, and appearing with higher syringyl OH/guaiacyl OH ratios. These results indicated that DCL underwent more sufficient dehydration of side-chain aliphatic-OH, hydrolysis reaction of β-O-4 linkages, and condensation reaction between each lignin units.

Key words: poplar, autohydrolysis, dissolved and colloidal lignin, structure characterization, condensation of lignin

中图分类号:

TQ35
TS71

王鹏, 秦影, 傅英娟, 王兆江, 张凤山. 杨木自水解液中溶解木质素和胶体木质素的结构特征[J]. 林产化学与工业, 2017, 37(4): 59-66.

WANG Peng, QIN Ying, FU Yingjuan, WANG Zhaojiang, ZHANG Fengshan. Structural Character of Dissolved and Colloidal Lignin in Hydrolysate from Poplar Woodchips Autohydrolysis[J]. Chemistry and Industry of Forest Products, 2017, 37(4): 59-66.

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杨木自水解液中溶解木质素和胶体木质素的结构特征

Structural Character of Dissolved and Colloidal Lignin in Hydrolysate from Poplar Woodchips Autohydrolysis

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