弹性导电复合纤维的制备及其应变与温度传感性能  

Preparation of elastic conductive composite fiber and its stain and temperature sensing properties

作　　者：罗梦颖 陈慧君 夏明[1] 王栋[1] 李沐芳[1] LUO Mengying;CHEN Huijun;XIA Ming;WANG Dong;LI Mufang(Key Laboratory of Textile Fiber and Products,Ministry of Education,Wuhan Textile University,Wuhan,Hubei 430200,China)

机构地区：[1]武汉纺织大学纺织纤维及制品教育部重点实验室,湖北武汉430200

出　　处：《纺织学报》2024年第10期9-15,共7页Journal of Textile Research

基　　金：国家重点研发计划项目(2022YFB3805801);湖北省杰出青年基金项目(2021CFA068);湖北省教育厅科学研究计划指导性项目(B2022078)。

摘　　要：为满足柔性可穿戴传感器的多功能传感需求,实现应变和温度传感具有重大的意义。采用湿法纺丝技术制备聚(3,4-乙烯二氧噻吩)-聚苯乙烯磺酸(PEDOT:PSS)/银纳米线(AgNWs)/聚氨酯(PU)弹性复合导电纤维,研究其拉伸应变传感性能和温度传感性能。结果表明:当AgNWs质量分数为20%,(PEDOT:PSS)与PU质量比为1∶3时,纤维热电性能达到最佳,电导率为47.4 S/cm,塞贝克系数为13.8μV/K,功率因数为902.7 nW/(m·K^(2)),此外,该弹性导电复合纤维具有良好的力学性能,断裂伸长率可达800%,能够检测0%~90%的应变范围,并在100次循环拉伸/回复下依旧保持良好稳定性;同时可将其作为温度传感器,快速检测人体与环境温度。Objective In order to promote the development of multi-functional flexible wearable sensors,it is of great significance to develop a sensor which could sense both strain and temperature.PEDOT:PSS is a conductive polymer with excellent thermoelectric properties,and can be employed as an ideal base material for stretchable strain sensor and temperature sensor.In this research,a composite conductive fiber was prepared by wet spinning method to achieve strain and temperature sensing.Method The composite conductive fibers with different PU content were prepared by the wet spinning method.The conductivity,Seebeck coefficient,power factor and mechanical property of the composite conductive fiber were measured and analyzed.To verify the ability of this fiber as a strain sensor for motion detection,it was fixed on the index finger and wrist respectively,and the resistance response at different bending angles was measured.Furthermore,the fiber was sewn into a glove,and the temperature-sensing performance was studied.Results With the increase of PU content,the conductive network was destructed by the non-conductive component,resulting in a decrease in conductivity,but the Seebeck coefficient of the composite remained stable because the thermoelectric material was unchanged.The stress and strain of composite fiber were both increased with the increase of PU content.This fiber showed wide work strain range(0%-90%),high sensitivity and good stability.The finger and wrist were bent for 5 times,the maximum resistance changes were basically the same,indicating that the elastic composite wire fiber sensor has good stability.The tensile deformation caused by wrist bending was larger than that caused by finger bending,the corresponding resistance change rate was also much larger than that caused by finger bending.When it is used as a temperature sensor,the voltage is generated by the temperature difference formed at the two ends of the fiber.With the temperature difference increasing,the voltage was increasing too.To detect the wate

关 键 词：聚(3 4-乙烯二氧噻吩)-聚苯乙烯磺酸 弹性导电复合纤维 湿法纺丝 拉伸传感 温度传感 智能可穿戴 

分 类 号：TB333[一般工业技术—材料科学与工程] TQ342.83[化学工程—化纤工业] TS102.5[轻工技术与工程—纺织工程]