文献类型：期刊文献

英文题名：Flexible organohydrogel ionic skin with Ultra-Low temperature freezing resistance and Ultra-Durable moisture retention

作者：Peng, Wenwu[1];Han, Lu[1];Gao, Yang[2];Gong, Zhiwei[3];Lu, Ting[1];Xu, Xingtao[4];Xu, Min[1];Yamauchi, Yusuke[4,5,6];Pan, Likun[1]

机构：[1]East China Normal Univ, Shanghai Key Lab Magnet Resonance, Sch Phys & Elect Sci, Shanghai 200241, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]East China Normal Univ, Sch Phys & Elect Sci, Shanghai 200241, Peoples R China;[4]Natl Inst Mat Sci NIMS, JST ERATO Yamauchi Mat Space Tecton Project & Int, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan;[5]Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia;[6]Univ Queensland, Australian Inst Bioengn & Nanotechnol AIBN, Brisbane, Qld 4072, Australia

年份：2022

卷号：608

起止页码：396

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20214110992016);WOS:【SCI-EXPANDED(收录号:WOS:000711688000010)】；

语种：英文

外文关键词：Ionic skin; Anti-freezing; Moisture retaining; Fatigue resistant; Organohydrogel

摘要：Hypothesis: One prevailing method to construct excellent temperature tolerance/long-lasting moisture hydrogels is to couple the original hydrogel networks with freezing-tolerant/moisture retaining agents, including ionic liquids, inorganic salts, zwitterionic osmolytes, and polyhydric alcohols. Among them, organohydrogels have shed new light on the development of ionic skins with long-term usability and stable sensing performance at subzero temperatures due to their long-lasting water retention and anti-freezing capability. Experiments: We report a dual network organohydrogel by doping conductive ZnSO4 into the double network hydrogel of polyvinyl alcohol-polyacrylamide (PVA-PAM) with subsequent immersing in a mixed solvent of ethylene glycol (EG) and H2O. The anti-freezing and moisture retaining abilities of the PVA/PAM/Zn/EG (PPZE) organohydrogel were studied and the sensing performances of the PPZE organohydrogel-based ionic skin were investigated. Findings: The organohydrogel exhibits a high conductivity (0.44 S m(-1)), excellent fatigue resistance and exceptional moisture retaining ability with more than 99.3% of the initial weight retention after 31 days storage at ambient temperature. Importantly, the PPZE organohydrogel-based ionic skin shows an ultra-low temperature anti-freezing ability and remains flexibility and sensing capability with a high sensitivity (signal response time similar to 0.23 s) even at -50 degrees C. The PPZE organohydrogel demonstrates a tremendous potential in artificial skin and health monitoring. (C) 2021 Elsevier Inc. All rights reserved.