Preparation and characterisation of methylated hemicelluloses from wheat straw

被引：60

作者：

Fang, JM ^{[1
]}

Fowler, P

Tomkinson, J

Hill, CAS

机构：

[1] Univ Wales, BioComposites Ctr, Bangor LL57 2UW, Gwynedd, Wales

[2] Univ Wales, Sch Agr & Forest Sci, Bangor LL57 2UW, Gwynedd, Wales

来源：

CARBOHYDRATE POLYMERS | 2002年 / 47卷 / 03期

关键词：

xylose; methylation; hemicelluloses;

D O I：

10.1016/S0144-8617(01)00186-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Wheat straw hemicellulose ether was prepared by methylation with methyl iodide using sodium hydride as a catalyst reacted in dimethyl sulphoxide. The degree of substitution (DS) was determined by elemental analysis. According to the elemental analysis data, the DS-value can be calculated; it was 1.7. The structure of the methylated hemicellulose formed was characterised by nuclear magnetic resonance (NMR) and Fourier transform infrared (Fr-IR) spectroscopy. The thermal properties of the prepared ether were studied by simultaneous thermal analyser (STA 625). Differential scanning calorimetry (DSC) was also used to determine the thermal profile of the material degradation. It was found that the thermal stability of wheat straw hemicellulose ether increased by methylation. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：285 / 293

页数：9

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