Fractional and physico-chemical analysis of soda-AQ lignin by successive extraction with organic solvents from oil palm EFB fiber

被引：9
作者：
Sun, RC [1 ]
Tomkinson, J [1 ]
Griffiths, S [1 ]
机构：
[1] Univ Wales, BioComposites Ctr, Bangor LL57 2UW, Gwynedd, Wales
来源：
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION | 2000年 / 5卷 / 4-6期
关键词：
lignin; fractionation; oil palm; soda-AQ; molecular weight; phenolic acids and aldehydes; thermal stability;
D O I：
10.1080/10236660008034643
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A soda-anthraquinone (AQ) lignin, derived from oil palm empty fruit bunch (EFB), was fractionated by successive extraction with dichloromethane, n-propanol, and methanol-dichloromethane (7/3, v/v). The fractionation resulted in four lignin fractions of increasing molecular weight from 2630 (fraction 1) to 4380 gmol(-1) (fraction 4). The lower-molecular-weight fractions showed high contents of carbonyl groups and high molar ratio of noncondensed syringyl/guaiacyl units, while the higher-molecular-weight fractions appeared to have high thermal stability.
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页码：531 / 547
页数：17
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