文献类型： 外文期刊
第一作者： Wei, Xiaoyi
作者： Wei, Xiaoyi;Wang, Yihong;Li, Jihua;Wang, Fei;Chang, Gang;Fu, Tiaokun;Zhou, Wei
作者机构：
关键词： Cellulose; Ionic liquid; High temperature; Hydrogen bonds
期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：9.381； 五年影响因子：8.678 ）
ISSN： 0144-8617
年卷期： 2018 年 201 卷
页码：
收录情况： SCI
摘要： Ionic liquids have been powerful solvents for cellulose. Mechanistic investigations of the dissolution processes have been extensively studied. In this paper, an experimental study has revealed that temperature also comes into play in cellulose dissolution. The supramolecular stuctrure of cellulose has been measured by X-ray diffraction, Fourier transform infrared spectroscopy, Solid-state CP/MAS C-13 NMR, X-ray photoelectron spectroscopy and Gel permeation chromatography analysis, and the effects of temperature on hydrogen bonds of cellulose in ILs were investigated. These results indicated that hydrogen bonds of cellulose might be cracked by different ways at different temperature: The disruption of intramolecular hydrogen bonds (O(3) H-O (5)) could promote the dissolution process at lower temperature. And the disruption of intramolecular hydrogen bonds (O (2) H-O (6)) might be responsible for cellulose dissolution at higher temperature. It was suggested that higher dissolving temperature might be a way to avoid cellulose degradation with a high cellulose yield.
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