文献类型：期刊文献

英文题名：Sensitive Wearable Strain Sensor Based on a Self-Doped Conductive Hydrogel

作者：Ji, Hongyu[1];He, Haochen[1];Sun, Jiangang[1];Lu, Wen[1];Yu, Hengfeng[1];Zhu, Junda[1];Liu, Yixiao[1];Chen, Shimeng[1];Cao, Hongliang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：6

期号：6

起止页码：4619

外文期刊名：ACS APPLIED ELECTRONIC MATERIALS

收录：;EI(收录号：20242316220909);WOS:【SCI-EXPANDED(收录号:WOS:001239419900001)】；

基金：This work was supported by the Shanghai Natural Science Foundation (18ZR1408300).

语种：英文

外文关键词：PEDOT-S; self-doped; photopolymerization; conductive hydrogel; strain sensor

摘要：Conductive hydrogels have been widely applied to develop flexible and wearable sensors. Classic conductive polymers such as poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) exhibit high conductivity and biocompatibility, but their intrinsic insolubility may affect the establishment of conductive pathways, thereby further impeding the enhancement of both electrical and mechanical properties. In this study, a self-doped highly conductive poly(3,4-ethylenedioxythiophene) sulfonate (PEDOT-S) solution was obtained by photopolymerization, avoiding the introduction of iron ions. Following this, we developed a double network (DN) hydrogel system from poly(vinyl alcohol) and polyacrylamide via a freezing-thawing approach, combining with PEDOT-S as conductive agent. The hydrogel exhibited robust mechanical strength, adhesive capability, and remarkable conductive sensitivity. As a strain sensor, the conductive hydrogel can be used to detect body motion and vocal cord vibrations, providing promising potential for application in flexible and wearable devices.