Inorganic Salts Induce Thermally Reversible and Anti-Freezing Cellulose Hydrogels

被引：461

作者：

Zhang, Xiong-Fei ^{[1
]}

Ma, Xiaofeng ^{[2
]}

Hou, Ting ^{[2
]}

Guo, Kechun ^{[2
]}

Yin, Jiayu ^{[2
]}

Wang, Zhongguo ^{[1
]}

Shu, Lian ^{[1
]}

He, Ming ^{[2
]}

Yao, Jianfeng ^{[1
]}

机构：

[1] Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Jiangsu Key Lab Chem & Utilizat Agr & Forest Biom, Nanjing 210037, Jiangsu, Peoples R China

[2] Nanjing Forestry Univ, Coll Sci, Nanjing 210037, Jiangsu, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 22期

关键词：

anti-freezing properties; cellulose; hydrogels; sol-gel processes; ORGANOHYDROGELS; FABRICATION;

D O I：

10.1002/anie.201902578

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Inspired by the anti-freezing mechanisms found in nature, ionic compounds (ZnCl2/CaCl2) are integrated into cellulose hydrogel networks to enhance the freezing resistance. In this work, cotton cellulose is dissolved by a specially designed ZnCl2/CaCl2 system, which endows the cellulose hydrogels specific properties such as excellent freeze-tolerance, good ion conductivity, and superior thermal reversibility. Interestingly, the rate of cellulose coagulation could be promoted by the addition of extra water or glycerol. This new type of cellulose-based hydrogel may be suitable for the construction of flexible devices used at temperature as low as -70 degrees C.

引用

页码：7366 / 7370

页数：5

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