Adding value to Alfa grass (Stipa tenacissima L.) soda lignin as phenolic resins -: 1.: Lignin characterization

被引：80

作者：

Hattalli, S ^{[1
]}

Benaboura, A

Ham-Pichavant, F

Nourmamode, A

Castellan, A

机构：

[1] Univ Bab Ez Zouar, Inst Chim, Algiers, Algeria

[2] Univ Bordeaux 1, Inst Pin, Lab Chim Subst Vegetales, F-33405 Talence, France

来源：

POLYMER DEGRADATION AND STABILITY | 2002年 / 76卷 / 02期

关键词：

lignin; Alfa grass; characterization; phenolic compounds;

D O I：

10.1016/S0141-3910(02)00022-8

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Soda lignin from black liquors of Alfa grass was precipitated with hydrochloric acid at pH 2 and 4.5, and with sulfuric acid at pH 4.5. The molecular structures of the lignins were analyzed for the first time. The phenolic structures were studied using UV-visible spectroscopy and P-31-NMR spectrometry. The lignin fragments were also analyzed by size exclusion chromatography and beta-O-4 bond content was determined by thioacidolysis. The total phenolic content was found to be low for annual plant lignin, with more phenolic guaiacyl units than syringyl ones, and with a low proportion of condensed units. The phenolic syringyl elements appear to include beta-O-4 bonds in large proportion in contrast with guaiacyl and p-hydroxyphenyl units. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：259 / 264

页数：6

共 27 条

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