溴化锂/聚乙烯醇导电水凝胶的制备及其传感性能  

Preparation and Sensing Properties of Lithium Bromide/Polyvinyl Alcohol Conducting Hydrogels

作　　者：王吉楠 丁新波[1] 刘涛[1] 仇巧华 王艳敏 WANG Jinan;DING Xinbo;LIU Tao;QIU Qiaohua;WANG Yanming(College of textile Science and Engineering,International Institute of Silk,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),浙江杭州310018

出　　处：《材料科学与工程学报》2024年第4期639-646,共8页Journal of Materials Science and Engineering

基　　金：国家自然科学基金项目(31900964)。

摘　　要：本研究对制备的溴化锂/聚乙烯醇(LiBr/PVA)导电水凝胶进行力学性能表征及其传感性能分析,确定了水凝胶的最佳制备参数比为PVA∶LiBr∶H_(2)O=1∶0.15∶9。此参数下制备的导电水凝胶的电导率最高可达140 mS/m,相较纯PVA水凝胶提高约50%;拉伸应力提高到0.25 MPa,拉伸应变提高到250%。本研究制备的水凝胶具有良好的速度响应效果,拉伸应变性能良好(≥75%),耐疲劳性能优异(>1000次),响应速度快。该导电水凝胶在拉伸应变传感器的制造中具有良好的应用前景。The basic and mechanical properties of the prepared LiBr/PVA conductive hydrogel were characterized,and the optimum preparation ratio of the hydrogel was determined as the mass ratio of PVA∶LiBr∶H_(2)O=1∶0.15∶9.For the as-prepared hydrogel,its conductivity is up to 140 mS/m,which is increased by about 50%when compared with the pure PVA hydrogel.Moreover,its tensile stress and strain are increased to 0.25 MPa and 250%,respectively.The hydrogel has a good speed response effect,which can provide a good speed feedback,a good tensile strain performance(≥75%),excellent fatigue resistance(>1000 times),as well as a sensitive response speed.It shows good sensing performance,indicating great potential in tensile strain sensors.

关 键 词：导电水凝胶 应变传感器 传感性能 耐疲劳性能 霍夫迈斯特效应 

分 类 号：TB34[一般工业技术—材料科学与工程]