期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 608, 期 -, 页码 396-404出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.09.125
关键词
Ionic skin; Anti-freezing; Moisture retaining; Fatigue resistant; Organohydrogel
Organohydrogels with dual networks doped with conductive ZnSO4 in a mixed solvent of ethylene glycol and water exhibit high conductivity, excellent fatigue resistance, and exceptional moisture retention. The resulting ionic skin based on the organohydrogel shows ultra-low temperature anti-freezing ability, flexibility, and high sensitivity, indicating great potential for applications in artificial skin and health monitoring.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据