Investigation of the chemical modifications of beech wood lignin during heat treatment

被引：147
作者：
Brosse, Nicolas [1 ]
El Hage, Roland [1 ]
Chaouch, Mounir [1 ]
Petrissans, Mathieu [1 ]
Dumarcay, Stephane [1 ]
Gerardin, Philippe [1 ]
机构：
[1] Nancy Univ, EA 4370, Lab Etud & Rech Mat Bois, F-54506 Vandoeuvre Les Nancy, France
来源：
POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 09期
关键词：
CP/MAS C-13 NMR; C-13; NMR; P-31; Heat treatment; Milled wood lignin; Thermal degradation; C-13; NMR; DECAY RESISTANCE;
D O I：
10.1016/j.polymdegradstab.2010.05.018
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Holocellulose, Klason lignin and milled wood lignin (MWL) of beech wood were extracted before and after heat treatment and analysed using CP MAS C-13 NMR, C-13 NMR, P-31 NMR and size exclusion chromatography (SEC). Experimental results showed that the thermal treatment degrades hemicelluloses and affects lignin polymer through depolymerisation due mainly to cleavage of beta-aryl-ether linkages and recondensation reactions. The spectroscopic analysis of MWL demonstrated that these recondensation reactions involved mainly guaiacyl units through formation of 5,5'-biphenolic and diarylmethane structures. Analysis of molecular weight distribution of MWL by SEC indicated that average molecular weights of heat treated milled wood lignin were lower than those of native milled wood lignin. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1721 / 1726
页数：6
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