Effects of process severity on the chemical structure of Miscanthus ethanol organosolv lignin

被引：197

作者：

El Hage, Roland ^{[1
]}

Brosse, Nicolas ^{[1
]}

Sannigrahi, Poulomi ^{[2
]}

Ragauskas, Arthur ^{[2
]}

机构：

[1] Nancy Univ, Fac Sci & Tech, Lab Etud & Rech MAt Bois, F-54500 Vandoeuvre Les Nancy, France

[2] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

来源：

POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 06期

关键词：

Miscanthus x giganteus; Lignin; Organosolv pre-treatment; NMR spectroscopy; FTIR spectroscopy; SEC; LODGEPOLE PINE; PRETREATMENT; WOOD; DELIGNIFICATION; FRACTIONATION; EXTRACTION; PRODUCTS;

D O I：

10.1016/j.polymdegradstab.2010.03.012

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Ethanol organosolv lignin extracted from Miscanthus x giganteus with differing levels of severity (1.75 < CS<2.8) were subjected to comprehensive structural characterization by C-13, P-31 NMR, FTIR spectroscopy and gel permeation chromatography. The results were compared to those from milled wood lignin from the same feedstock. The results showed that an increase in the severity of the treatment enhanced the dehydration reactions on the side chain and the condensation of lignin, increased the concentration of phenol groups and decreased the molecular mass of lignin fragments. It appeared that for the experimental conditions generally employed the cleavage of a-aryl ether bonds is primarily reaction responsible for lignin depolymerization under the organosolv conditions examined. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：997 / 1003

页数：7

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