Characterization of milled wood lignin and ethanol organosolv lignin from miscanthus

被引：428

作者：

El Hage, Roland ^{[1
]}

Brosse, Nicolas ^{[1
]}

Chrusciel, Laurent ^{[1
]}

Sanchez, Christian ^{[3
]}

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

[3] Nancy Univ, ENSAIA, Lab Ingn Biomol, F-54505 Vandoeuvre Les Nancy, France

来源：

POLYMER DEGRADATION AND STABILITY | 2009年 / 94卷 / 10期

关键词：

Miscanthus x giganteus; Lignin; Organosolv pre-treatment; C-13; NMR; P-31; UV spectroscopy; STRUCTURAL-CHARACTERIZATION; LODGEPOLE PINE; MAIZE STEMS; PRETREATMENT; WHEAT; STRAW; HYDROLYSIS; EXTRACTION; POPLAR; ESTER;

D O I：

10.1016/j.polymdegradstab.2009.07.007

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 (using the following conditions: T = 190 degrees C, t = 60 min, sulfuric acid = 1.2% w/w, EtOH/H2O = 0.65) and milled wood lignin from Miscanthus x giganteus were subjected to a comprehensive structural characterization by C-13, P-31 NMR, FTIR, UV spectroscopies and size exclusion chromatography. The results showed that Miscanthus lignin is an H/G/S type (4%, 52%, 44% respectively) with similar to 0.41 beta-O-4 linkage per aromatic ring and contains coumarylate linkages (0.1/Ar). It was shown that during organosolv treatment, cleavage of beta-O-4 linkages and of ester bond (acetyl and coumaryl residues) was the major mechanisms of lignin breakdown but the process did not significantly change the core of the lignin structure. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1632 / 1638

页数：7

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