LM@CNT/WPU电阻应变传感纤维的制备及性能  

Preparation and properties of LM@CNT/WPU resistive strain sensing fibers

作　　者：于郭鑫 邓晶 张亚娟 胡婉宁 范大程 王蕊宁 YU Guoxin;DENG Jing;ZHANG Yajuan;HU Wanning;FAN Dacheng;WANG Ruining(School of Textile Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China;College of Textiles,Donghua University,Shanghai 201620,China)

机构地区：[1]西安工程大学纺织科学与工程学院,陕西西安710048 [2]东华大学纺织学院,上海201620

出　　处：《纺织高校基础科学学报》2025年第2期41-49,共9页Basic Sciences Journal of Textile Universities

基　　金：陕西省大学生创新创业训练计划项目(S202310709108)。

摘　　要：为了降低镓基液态金属的表面张力,增加与其他基体结合的亲和性与稳定性,采用镓基液态金属(LM)与碳纳米管(CNT)制备具有良好亲和性的LM@CNT油墨作为导电材料,以水性聚氨酯(WPU)为弹性纤维基体,通过湿法纺丝工艺制备LM@CNT/WPU电阻应变传感纤维。对传感纤维的形貌和结构进行表征,并对其力学性能和拉伸应变传感性能进行测试。结果表明,利用CNT表面的羧基官能团与LM的Ga3+的络合作用能有效改善LM的表面张力和弹性基体润湿性,可以使LM均匀分布于纤维的内部与表面,赋予LM@CNT/WPU电阻应变传感纤维高灵敏度、快速响应、稳定、耐用的特性。在力学性能方面,纤维的杨氏模量为21.23 MPa,断裂伸长率为557%,表现出良好的机械性能和延伸性。在传感性能方面,电阻应变传感纤维在0~80%应变范围内的灵敏度可达2.13;当应变超过80%,灵敏度增加至3.78,并且随着应变的增大,纤维的灵敏度增强。经过循环1000次的拉伸-回复测试,电阻应变传感纤维展现出优异的电阻信号稳定性,在人机交互、人体运动监测等应用领域具有较大的潜力。In order to reduce the surface tension of gallium-based liquid metal and increase the affinity and stability of bonding with other substrates,gallium-based liquid metal(LM)and carbon nanotubes(CNT)were used to prepare LM@CNT ink with good affinity as a conductive material,and waterborne polyurethane(WPU)was used as an elastic fiber substrate,and LM@CNT/WPU resistive strain sensing fibers were prepared by wet spinning process.The morphology and structure of the fibers were characterized,and their mechanical and tensile strain sensing properties were tested.The results show that the complexation of carboxyl functional group on the surface of CNT with Ga3+of LM effectively improves the surface tension and wettability of LM to the elastic matrix,which can make LM uniformly distributed in the interior and surface of the fiber,and endows the fibers with the characteristics of high sensitivity,fast response,stability,and durability.In terms of mechanical properties,the Young's modulus of the fibers is 21.23 MPa,and the elongation at break is 557%,exhibiting good mechanical properties and elongation.In terms of sensing,the sensitivity of the fibers in the range of 0~80%strain GF can reach 2.13.When the strain exceeds 80%,the sensitivity increases to 3.78,and as the strain increases,the sensitivity of the fiber increases.After 1000 cycles of stretch-recovery test,the conductive sensing fiber shows excellent resistance signal stability,which has great potential in human-computer interaction,human motion monitoring and other application areas.

关 键 词：液态金属 碳纳米管 水性聚氨酯 湿法纺丝 传感纤维 

分 类 号：TS106.4[轻工技术与工程—纺织工程] TQ342.83[轻工技术与工程—纺织科学与工程]