Physicochemical characterization of liginin isolated with high yield purity from wheat straw

被引：14
|
作者：
Sun, XF [1 ]
Sun, RC
Fowler, P
Baird, MS
机构：
[1] Univ Wales, Biocomposites Ctr, Bangor LL57 2UW, Gwynedd, Wales
[2] NW Sci & Technol Univ Agr & Forestry, Coll Forestry, Yangling, Peoples R China
[3] S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou, Peoples R China
[4] Univ Wales, Dept Chem, Bangor LL57 2UW, Gwynedd, Wales
来源：
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION | 2004年 / 9卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
lignin; UV; thermal analysis; NMR; molecular weight; wheat straw;
D O I：
10.1080/10236660490935727
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Lignin preparation with high yield (85.71%) and purity (96.97%) from wheat straw was obtained by ball milling treatment and direct acidic dioxane extraction. This procedure gives a material that is representative of the whole lignin of wheat straw. The lignin fraction is distinguished by high beta-O-4' structures and small amounts of condensed units (beta-5, 5-5 and beta-1') enriched in guaiacyl units. p-Coumaric acid is linked to lignin via gamma-ester bond and a few ether bonds such as beta-O-4' whereas ferulic acid is linked to lignin by ether bonds, and its dehydrodimers (5-5'/8-O-4') are also incorporated into lignin polymer.
引用
收藏
页码：317 / 337
页数：21
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