Ionic conductive hydrogels toughened by latex particles for strain sensors  

作　　者：CHANG JingYu ZHANG ZhiXin JIA Fei GAO GuangHui 

机构地区：[1]Polymeric and Soft Materials L aboratory,School of Chemical Engineering and Advanced Institute of Materials Science,Changchun University of Technology,Changchun 130012,China

出　　处：《Science China(Technological Sciences)》2021年第4期827-835,共9页中国科学（技术科学英文版）

基　　金：supported by the Science and Technology Department of Jilin Province(Grant Nos.20180201021GX&20200708102YY)。

摘　　要：Conductive hydrogels have attracted tremendous attention due to their excellent softness and stretchability as wearable strain sensing devices.However,most of hydrogel-based strain sensors suffered from poor self-recoverability and fatigue resistance,resulting in significant decrease of strain sensitivity after recycling.Here,a soft and flexible wearable strain sensor is prepared by using an ionic conductive hydrogel with latex particles as physical cross-linking centers.The dynamic physical cross-linking structure can effectively dissipate energy through disruption and reconstruction of molecular segments,thereby imparting excellent stretchability,self-recoverability and fatigue resistance.In addition,the hydrogel exhibits excellent strain-sensitive resistance changes,which enables it to be assembled as a wearable sensor to monitor human motions.As a result,the hydrogel strain sensor can provide precise feedback for a wide range of human activities,including large-scale joint bending and tiny phonating.Therefore,the tough ionic conductive hydrogel would be widely applied in electronic skin,medical monitoring and artificial intelligence.

关 键 词：ionic conductive hydrogel strain sensor SELF-RECOVERY fatigue resistance 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TQ427.26[自动化与计算机技术—控制科学与工程]