Inorganic Salts Induce Thermally Reversible and Anti‐Freezing Cellulose Hydrogels,Angewandte Chemie International Edition

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Inorganic Salts Induce Thermally Reversible and Anti‐Freezing Cellulose Hydrogels
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-04-18 , DOI: 10.1002/anie.201902578
Xiong‐Fei Zhang ₁ , Xiaofeng Ma ₂ , Ting Hou ₂ , Kechun Guo ₂ , Jiayu Yin ₂ , Zhongguo Wang ₁ , Lian Shu ₁ , Ming He ₂ , Jianfeng Yao ₁

Affiliation

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 °C.

中文翻译：

无机盐诱导热可逆和抗冻纤维素水凝胶

受自然界发现的抗冻机制的启发，离子化合物（ZnCl ₂ / CaCl ₂）被整合到纤维素水凝胶网络中，以增强抗冻性。在这项工作中，棉纤维素被专门设计的ZnCl ₂ / CaCl ₂系统溶解，这赋予了纤维素水凝胶特殊的性能，例如出色的耐冻性，良好的离子传导性和出色的热可逆性。有趣的是，通过添加额外的水或甘油可以提高纤维素的凝结速率。这种新型的纤维素基水凝胶可能适用于在低至−70°C的温度下使用的柔性设备的构造。

更新日期：2019-04-18

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