纺织高校基础科学学报2024，Vol.37Issue(5)：20-27,8.DOI:10.13338/j.issn.1006-8341.2024.05.003
碳纳米管/热塑性聚氨酯弹性导电复合纤维的制备及性能
Preparation and properties of carbon nanotubes/thermoplastic polyurethane elastic conductive fibers
摘要
Abstract
Stretch strain sensing fibers are an important unit in smart wearable textiles,and achie-ving stretch recovery function while improving electrical conductivity is the basis for the realiza-tion of signal collection and transmission functions in smart wearable textiles.To improve the mechanical properties of stretch strain sensing fibers and solve the problem of achieving stretch recovery and electrical conductivity,multiwalled carbon nanotubes with excellent electrical con-ductivity were selected as the conductive filler and thermoplastic polyurethane with high elasticity as the elastic matrix to prepare composite elastic conductive fibers.In this study,the MWCNTs/TPU composite fibers were prepared by wet spinning process using a porous nozzle,and deionized water was used as the solidifying bath.The spinning process was carried out on the fibers by pul-ling and heat drying,and the MWCNTs loading amount in the TPU spinning solution was adjusted to prepare different specifications of MWCNTs/TPU filament fibers.The morphological structure,electrical conductivity,mechanical properties,and strain sensing performance of the composite fibers were tested and characterized.The results show that as the addition of MWCNTs increases,the electrical conductivity increases,and MWCNTs have good bonding with TPU.When the addition of multiwalled carbon nanotubes is 9％,the electrical conductivity of the MWCNTs/TPU fila-ment fiber is 37.5 S/m,the tensile strength is 23.82 MPa,and the elongation at break is 153％.The resistance change rate of the TPU filament fiber samples with MWCNTs additions of 8％and 9％under different strain stretching conditions shows good stability over time.The MWCNTs/TPU elastic conductive filament samples show a large strain working range and good cyclic stabil-ity(2 000 cycles).This study can provide experimental reference for low-cost,batch,and high-speed production of high-strength elastic composite conductive stretch strain sensing materials using industrial wet spinning machines.关键词
智能可穿戴/多壁碳纳米管/聚氨酯/湿法纺丝/导电纤维Key words
smart wearable/multiwalled carbon nanotube/polyurethane/wet spinning/conduc-tive fiber分类
化学化工引用本文复制引用
杨金平,孙润军,程雪,孙华秋,魏亮..碳纳米管/热塑性聚氨酯弹性导电复合纤维的制备及性能[J].纺织高校基础科学学报,2024,37(5):20-27,8.基金项目
国家科技部重点研发计划项目(2018YFC2000900) （2018YFC2000900）
陕西省自然科学基础研究计划项目(2022JQ-016) （2022JQ-016）
