The Properties of Choline Chloride-based Deep Eutectic Solvents and their Performance in the Dissolution of Cellulose

被引：9

作者：

Ren, Hongwei ^{[1
,2
]}

Chen, Chunmao ^{[1
]}

Wang, Qinghong ^{[1
]}

Zhao, Dishun ^{[2
]}

Guo, Shaohui ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China

[2] Hebei Univ Sci & Technol, Sch Sci, Shijiazhuang 050018, Peoples R China

来源：

BIORESOURCES | 2016年 / 11卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Deep eutectic solvents; Cellulose; Dissolution; Choline chloride; Cosolvent; TEMPERATURE IONIC LIQUIDS; LIGNOCELLULOSIC BIOMASS; MIXTURES; PRETREATMENT; SOLUBILIZATION; CHALLENGES; COSOLVENT; CHEMISTRY; VISCOSITY; DESIGN;

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

A series of choline chloride-based deep eutectic solvents (ChCl-DESs) were synthesized and characterized, and their performance in the dissolution of cellulose was investigated. The hydrogen-bond donors significantly (beta-value) affected the properties of ChCl-DESs, causing differentiated dissolution performances. ChCl-imidazole (Im) showed the highest Hammett acidity function (1.869), hydrogen bond basicity (0.864), and dipolarity/polarizability effect (0.382) among the ChCl-DESs. The ChCl-Im showed the lowest pseudo-activation energy for viscous flow (31.76 kJ mol(-1)) among the ChCl-DESs. The properties of ChCl-Im caused the highest solubility of cellulose (2.48 wt.%) relative to the other ChCl-DESs. Polyethylene glycol (PEG), as a co-solvent, significantly (beta-value) enhanced the accessibility of ChCl-Im to cellulose by breaking the supramolecular structure of cellulose, promoting its dissolution. The decrystallization of ChCl-Im-coupled PEG approximately doubled the dissolving capabilities, and the solubility increased by more than 80% in comparison with only ChCl-Im. The cellulose was directly dissolved by ChCl-Im-coupled PEG, and no other derivatives were produced.

引用

页码：5435 / 5451

页数：17

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