文献类型：期刊文献

英文题名：Highly Stretchable and Self-Healable MXene/Polyvinyl Alcohol Hydrogel Electrode for Wearable Capacitive Electronic Skin

作者：Zhang, Jiaqi[1];Wan, Lijia[2];Gao, Yang[1];Fang, Xiaoliang[1];Lu, Ting[2];Pan, Likun[2];Xuan, Fuzhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]East China Normal Univ, Sch Phys & Mat Sci, Shanghai 200062, Peoples R China

年份：2019

卷号：5

期号：7

外文期刊名：ADVANCED ELECTRONIC MATERIALS

收录：;EI(收录号：20192407033806);WOS:【SCI-EXPANDED(收录号:WOS:000477987400020)】；

基金：J.Z. and L.W. contributed equally to this work. This project was supported by National Key Research and Development Program of China (No. 2018YFB1105400), National Natural Science Foundation of China (Grant Nos. 51705154 and 61804054), Shanghai Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Shanghai Rising-Star Program (A type) (Grant No. 18QA1401300), and Shanghai Sailing Program17YF1403300.

语种：英文

外文关键词：capacitive strain sensors; electronic skin; human motion detection; MXene; PVA hydrogels; self healing

摘要：Capacitive strain sensors could become an important component of electronic skin (E-skin) due to their low hysteresis and high linearity. However, to fully mimic the functionality of human skin, a capacitive strain sensor should be stretchable and self-healable. The development of such a sensor is limited by electrode materials which generally lack self-healability and/or stretchability. A highly stretchable and self-healing MXene (Ti3C2Tx)/polyvinyl alcohol (PVA) hydrogel electrode is developed for use in capacitive strain sensors for E-skin. The incorporation of MXene into the PVA enhances the conductivity and self-healability of the hydrogel. The electrode exhibits high stretchability at break (approximate to 1200%) and instantaneous self healing (healing time approximate to 0.15 s). A capacitive sensor based on these electrodes shows high linearity, up to 200%, low hysteresis, a sensitivity of approximate to 0.40, and good mechanical durability (a 5.8% reduction in relative capacitance change after 10 000 cycles). Moreover, this sensor maintains its performance after a self-healing test, proving its potential for the monitoring of human motion.