MXene-composited highly stretchable,sensitive and durable hydrogel for flexible strain sensors

作     者：Wei Yuan Xinyu Qu Yao Lu Wen Zhao Yanfang Ren Qian Wang Wenjun Wang Xiaochen Dong Wei Yuan;Xinyu Qu;Yao Lu;Wen Zhao;Yanfang Ren;Qian Wang;Wenjun Wang;Xiaochen Dong

作者机构：Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM)School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211800China School of Physical Science and Information TechnologyLiaocheng UniversityLiaocheng 252059China School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044 China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2021年第32卷第6期

页      面：2021-2026页

核心收录：

学科分类：081702[工学-化学工艺] 080202[工学-机械电子工程] 08[工学] 0817[工学-化学工程与技术] 0802[工学-机械工程] 

基　　金：supported by the National Natural Science Foundation of China(No.61775095) six talent peak innovation team in Jiangsu Province(No.TD-SWYY-009) “Taishan scholars”construction special fund of Shandong Province 

主　　题：Hydrogel MXene Strain sensor High stretchablity and sensitivity Durability 

摘      要：The flourishing development in flexible electronics has provoked intensive research in flexible strain sensors to realize accurate perception acquisition under different external ***,building hydrogel-based strain sensors with high stretchability and sensitivity remains a great ***,MXene nanosheets were composited into polyacrylamide-sodium alginate matrix to construct mechanical robust and sensitive double networked hydrogel strain *** hydrophilic MXene nanosheets formed strong interactions with the polymer matrix and endowed the hydrogel with excellent tensile properties(3150%),compliant mechanical strength(2.03 kPa^(-1)in Young’s Module)and long-lasting stability and fatigue resistance(1000 dynamic cycles under 1,600%strain).Due to the highly oriented MXene-based three dimensional conductive networks,the hydrogel sensor achieved extremely high tensile sensitivity(18.15 in gauge factor)and compression sensitivity(0.38 kPa^(-1)below 3 kPa).MXene hydrogel-based strain sensors also displayed negligible hysteresis in electromechanical performance,typical frequent-independent feature and rapid response time to external ***,the sensor exhibited accurate response to different scales of human movements,providing potential application in speech recognition,expression recognition and handwriting verification.