聚吡咯/氨纶长丝的应变传感性能与应用  

Strain-sensing performance of polypyrrole/polyurethane filaments and application

作　　者：王博[1,2] 刘美亚 陈明娜 宋孜灿 夏明 李沐芳[1] 王栋[1] WANG Bo;LIU Meiya;CHEN Mingna;SONG Zican;XIA Ming;LI Mufang;WANG Dong(Key Laboratory of Textile Fibers and Products,Ministry of Education,Wuhan Textile University,Wuhan,Hubei 430200,China;College of Textile Science and Engineering,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 [2]武汉纺织大学纺织科学与工程学院,湖北武汉430200

出　　处：《纺织学报》2024年第2期119-125,共7页Journal of Textile Research

基　　金：国家重点研发计划项目(2022YFB3805803);湖北省高等学校优秀中青年科技创新团队项目(T2021007);湖北省教育厅科学研究计划指导性项目(B2022078)。

摘　　要：为制备应用于运动监测方面的柔性拉伸应变传感器,探索拉伸型应变传感材料自身长度及拉伸应变对运动监测效果的影响,将表面聚合吡咯的氨纶长丝裁剪成不同长度进行循环拉伸测试,通过扫描电子显微镜和红外光谱仪对氨纶长丝和聚吡咯/氨纶长丝的微观形貌及化学结构进行表征,并测试分析了不同长度的聚吡咯/氨纶长丝在不同速率下拉伸不同应变时的电力学性能。结果表明:通过原位聚合可使聚吡咯完全覆盖氨纶长丝表面,所得聚吡咯/氨纶长丝在500%的应变范围内应力最高可达21.0 MPa;灵敏度值在0%~63%和118%~243%应变范围内分别为1.82和43.3,在800 mm/min速率下拉伸10%应变的响应时间为200 ms。为探索聚吡咯/氨纶长丝与实际应用的匹配性,测试了不同长度聚吡咯/氨纶长丝在连续循环拉伸过程中的电阻变化,归纳其电阻变化特性,并将有效长度1 cm的聚吡咯/氨纶长丝固定在食指第2关节处以监测手指关节的重复弯曲。Objective Flexible strain sensor shows broad application prospects in human-computer interaction,electronic skin,intelligent wearables and other aspects.Many researchers have spared no effort to study the materials for the improvement of sensing performance.However,sufficient attention to the applicability of the sensors is still lacking in terms of the sensing parameters such as sensor's size,applied strain,tensile rate.In this study,the polyurethane thread coated with polypyrrole(PPy/PU)filament via in-situ polymerization was used as strain sensor,and the sensor length,strain,and tensile rate were investigated to conclude a suitable parameter for the monitoring of the index finger bending.Method Because the group of organic molecular is responsive to the infrared light and each group exhibits their unique vibration forms,Fourier transform infrared(FT-IR)spectrometer was used to identify the materials.FT-IR(BRUKER Vertex 70)was used to characterize the groups of the PPy/PU filament with wavenumber from 4500 to 400 cm-1.Scanning electron microscope(JEOL JSM-7800F)based on secondary electrons imaging was used to observe the surface morphologies of PU filament and PPy/PU filament.Also,electronic universal material testing machine(Instron 5976)and electrochemical workstation(CHI-660e)were combined to investigate the resistance variation and sensing performance of the PPy/PU filament.Results The FT-IR characteristic peaks for PU filament were detected,which showed that they almost disappeared after the in-situ polymerization of PPy,indicating the favorable covering of the conductive layer.The FE-SEM images also demonstrated the full deposition of PPy on the PU fibers.The prepared PPy/PU filament exhibited a resistance of 268.9Ωper centimeter,indicated two linear response region including 0-63% strain and 118%-243% strain with Gauge Factor values of 1.82 and 43.3 respectively,and revealed a short response time(200 ms)for 10% strain.Stretched to various strains,PPy/PU filament with different lengths demonstrated that

关 键 词：导电长丝 应变传感器 聚吡咯 氨纶 传感材料 适用性 

分 类 号：TQ342.83[化学工程—化纤工业]