Effect of alkyl chain length in anion on dissolution of cellulose in 1-butyl-3-methylimidazolium carboxylate ionic liquids

被引：45

作者：

Xu, Airong ^{[1
]}

Zhang, Yibo ^{[1
]}

Lu, Weiwei ^{[1
]}

Yao, Kaisheng ^{[1
]}

Xu, Hang ^{[1
]}

机构：

[1] Henan Univ Sci & Technol, Sch Chem Engn & Pharmaceut, Luoyang 471023, Henan, Peoples R China

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2014年 / 197卷

基金：

中国国家自然科学基金;

关键词：

Ionic liquids; Carboxylate anion; Alkyl chain length; Cellulose dissolution; Regenerated cellulose; INFRARED-SPECTRA; AQUEOUS-SOLUTION; TEMPERATURE; POLYSACCHARIDES; SOLUBILITY;

D O I：

10.1016/j.molliq.2014.05.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In recent years, 1-butyl-3-methylimidazolium carboxylate ionic liquids (Is) have been reported to be powerful solvents for cellulose. However, little is known for the influence of the chain length in carboxylate anion on the solubility of cellulose. Therefore, in this work, we have synthesized 1-butyl-3-methylimidazolium carboxylate ILs including 1-butyl-3-methylimidazolium formate ([C(4)mim][HCOO]), acetate ([C(4)min][CH3COO]), propionate ([C(4)mim][CH3CH2COO]) and butyrate ([C(4)mim][CH3(CH2)(2)COO]), in which the alkyl chain length in the carboxylate anion is being varied. Solubilities of cellulose in the ILs have been determined experimentally at 70 degrees C. The effect of the chain length in carboxylate anion on the solubility of cellulose has been estimated and investigated by H-1 NMR Meanwhile, the regenerated cellulose from the ILs were investigated by scanning electron micrograph (SEM), thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. Such knowledge would enhance our understanding of the design of novel ILs for cellulose. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：211 / 214

页数：4

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