文献类型：期刊文献

英文题名：A moisture self-regenerative, ultra-low temperature anti-freezing and self-adhesive polyvinyl alcohol/polyacrylamide/CaCl2/MXene ionotronics hydrogel for bionic skin strain sensor

作者：Peng, Wenwu[1];Pan, Xinrong[1];Liu, Xinjuan[2];Gao, Yang[3];Lu, Ting[1];Li, Jiabao[4];Xu, Min[1];Pan, Likun[1]

机构：[1]East China Normal Univ, Sch Phys & Elect Sci, Shanghai Key Lab Magnet Resonance, Shanghai 200241, Peoples R China;[2]Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[4]Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China

年份：2023

卷号：634

起止页码：782

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20225213299935);WOS:【SCI-EXPANDED(收录号:WOS:000964137900001)】；

基金：This study was supported by the National Natural Science Foundation of China (No. 21875068).

语种：英文

外文关键词：Moisture self-regenerative; Anti-freezing; Ionotronics hydrogel; Bionic skin; Strain sensor

摘要：Ignited by the concept of bionics, hydrogel-based bionic skin sensors have received more and more atten-tion and been widely used in health monitoring, robots, implantable prostheses and human-machine interfaces. However, there still remain some challenges to be urgently solved for hydrogel-based bionic skin sensors, such as the water evaporation and the defects of single conductive mechanism of electronic skin or ionic skin. Herein, we prepared a polyvinyl alcohol/polyacrylamide/CaCl2/MXene (PPCM) ionotronics hydrogel with moisture self-regenerative, highly sensitive, ultra-low temperature anti -freezing (-50 degrees C) and self-adhesive features and applied it as bionic skin strain sensor. The introduction of MXene and CaCl2 endows the PPCM hydrogel with both electron and ion conductive channels, which effectively compensates for the defects of single electronic skin or ionic skin. Importantly, the addition of CaCl2 into the PPCM hydrogel offers it the moisture self-regenerative ability, holding the long-term water retention. The water in the PPCM hydrogel can still be kept in a stable state after continuous use for 70 days at room temperature, thus ensuring the long-term stability of the hydrogel-based sensor. Such a moisture self-regenerative ability should be an important feature for intelligentizing the hydrogel-based bionic skin for practical applications. CO 2022 Elsevier Inc. All rights reserved.