多孔MXene/热塑性聚氨酯纤维的制备及其应力应变传感性能  

Preparation of porous MXene/thermoplastic polyurethane fiber and its stress-strain sensing performance

作　　者：刘锦锋 杜康存 肖畅 付少海[1,2] 张丽平 LIU Jinfeng;DU Kangcun;XIAO Chang;FU Shaohai;ZHANG Liping(Key Laboratory of Eco-Textiles(Jiangnan University),Ministry of Education,Wuxi,Jiangsu 214122,China;Jiangsu Engineering Research Center for Digital Textile Inkjet Printing,Wuxi,Jiangsu 214122,China)

机构地区：[1]生态纺织教育部重点实验室(江南大学),江苏无锡214122 [2]江苏省纺织品数字喷墨印花工程技术研究中心,江苏无锡214122

出　　处：《纺织学报》2025年第3期41-48,共8页Journal of Textile Research

基　　金：江苏省自然科学基金项目(BK20211240);江南大学大学生创新创业训练项目(202410295195Y)。

摘　　要：为改善热塑性聚氨酯(TPU)作为应力应变传感纤维基材时传感灵敏度不足的问题,以二维过渡金属碳化物/碳氮化物(MXene)为导电填料,TPU为纤维基材,通过湿法纺丝制备了多孔MXene/TPU应力应变传感纤维,并研究了TPU和MXene不同占比对纤维结构和性能的影响。结果表明:当导电填料MXene质量分数为15.09%时,MXene/TPU纤维具有较好的力学性能,断裂强度为2.12 MPa,断裂伸长率为622%;该纤维具有良好的导电性能,其电导率为0.86 S/m,在10%和50%的拉伸应变下其灵敏度分别达到20.45和151.12,且经过500 s的循环拉伸后电阻信号仍具有较好的稳定性。Objective In recent years,there has been a surge in the research of flexible sensor devices,and owing to their lightweight,flexibility,and biocompatibility,they became a popular topic of scholarly investigation.These devices have found widespread application in flexible sensing,actuators,and wearable devices.However,in the realm of stress and strain sensing,fiber sensors often display poor resilience and low sensing sensitivity,which significantly limit their use and growth in this field.Therefore,thermoplastic polyurethane(TPU)is used as the fiber substrate and Ti_(3)C_(2)T_(x) MXene is used as the conductive filler to prepare a porous stress and strain sensing fiber with good resilience and high sensitivity.Method The honeycomb-like structure of porous stress-strain sensing fibers was prepared by wet spinning,using the different solubilities of N,N-dimethylformamide(DMF)in water and isopropanol(IPA)to delay the solvent exchange process between the spinning solution and the coagulation bath.Flexible sensing fibers with high sensitivity and good resilience were achieved by adjusting the loading amount of MXene on the fibers.The influences of MXene addition on the microstructure,thermal stability,mechanical properties and electrical properties of the fibers were studied,and this fiber was applied to the detection of human motion.Results The porous thermoplastic polyurethane-based conductive fibers were successfully obtained through wet spinning.In the cross section,TPU fiber presents a honeycomb-like structure,and the pores of MXene/TPU fiber are expanded by virtue of the addition of MXene,showing a non-uniform pore structure.The MXene nanosheets are successfully attached to these pores and build a good conductive network.At the same time,MXene is also embedded on the fiber surface to cause the fiber surface be flat tened.The Ti elements in MXene are evenly dispersed on the fiber.In the thermal stability analysis,the addition of MXene led to the advance of the thermal cracking peak from 430℃to 310℃and 400℃,a

关 键 词：二维过渡金属碳化物/碳氮化物 热塑性聚氨酯 导电纤维 湿法纺丝 应力应变传感 

分 类 号：TQ342.83[化学工程—化纤工业]