Inorganic Salts Induce Thermally Reversible and Anti-Freezing Cellulose Hydrogels.
Inorganic Salts Induce Thermally Reversible and Anti-Freezing Cellulose Hydrogels.
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DOI：
10.1002/anie.201902578
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发表时间：
2019-04
影响因子：
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通讯作者：
Xiong-fei Zhang;Xiaofeng Ma;Ting Hou;Kechun Guo;Jiayu Yin;Zhongguo Wang;Lian Shu;Ming He
中科院分区：
文献类型：
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作者：
Xiong-fei Zhang;Xiaofeng Ma;Ting Hou;Kechun Guo;Jiayu Yin;Zhongguo Wang;Lian Shu;Ming He
受自然界中发现的防冻机理的启发，离子化合物(ZnCl2/CaCl2)被整合到纤维素水凝胶网络中以提高抗冻性。在这项工作中，棉花纤维被一种特殊设计的ZnCl2/CaCl2体系溶解，该体系赋予了纤维素水凝胶优异的抗冻性、良好的离子导电性和优异的热可逆性。有趣的是，添加额外的水或甘油可以提高纤维素的凝结速度。这种新型的纤维素基水凝胶可能适用于构建温度低至-70°C的柔性设备。
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.