基于湿法纺丝工艺制备的MWCNTs/TPU复合导电纤维及其在柔性传感器中的应用  

MWCNTs/TPU composite conductive fibers prepared by wet spinning process and their application in flexible sensors

作　　者：马向达 吴雪琪 林少填 马向前 于晖[1] MA Xiangda;WU Xueqi;LIN Shaotian;MA Xiangqian;YU Hui(School of Textile and Engineering,Wuyi University,Jiangmen 5290201,Guangdong,China;CiTiC Dicastal Wheel Manufacturing Co.,Ltd.,Qinhuangdao 066011,Hebei,China)

机构地区：[1]五邑大学纺织科学与工程学院,广东江门5290201 [2]中信戴卡股份有限公司,河北秦皇岛066011

出　　处：《纺织工程学报》2024年第5期1-12,共12页JOURNAL OF ADVANCED TEXTILE ENGINEERING

基　　金：广东省自然科学基金(2024A1515010273);广东省教育厅创新团队项目(2023KCXTD040)。

摘　　要：目前,柔性应变/温度传感器的制备主要依赖于涂层技术,但该方法仅适合薄膜基传感器的规模化制备,导致纤维基传感器的发展受到限制。为解决这一问题,以热塑性聚氨酯(TPU)为基体,多壁碳纳米管(MWCNTs)为导电材料,采用湿法纺丝工艺制备了可连续生产的MWCNTs/TPU复合导电纤维,并通过研究不同MWCNTs的配比对复合导电纤维的影响,讨论该纤维在柔性传感器中的应用价值。在MWCNTs占比为2.5 wt%时,复合导电纤维表现出高弹性(ε=326.1%)和高拉伸灵敏度系数(GF=3.18),随着MWCNTs占比增加到5 wt%时,复合导电纤维的弹性和拉伸灵敏度降低(ε=50.3%,GF=2.36),但表现出更高的稳定性以及出色的温度响应性能(灵敏度C=-1.26%/℃,线性关系R^(2)=0.98)。该研究为纤维基柔性传感器工业化生产提供了重要的技术参考。Currently,the preparation of flexible strain/temperature sensors is mainly dependent on dip coating technology,which is difficult to achieve large-scale continuous production.To address this issue,thermoplastic polyurethane(TPU)as the matrix and multi-walled carbon nanotubes(MWCNTs)as the conductive material,using a wet spinning process to prepare MWCNTs/TPU composite conductive fibers capable of continuous production.The effects of different MWCNTs ratios on the composite conductive fibers are studied,and the application value of these fibers in flexible sensors is discussed.When the MWCNTs content is 2.5 wt%,the composite conductive fibers exhibit high elasticity(ε=326.1%)and high tensile gauge factor(GF=3.18).As the MWCNTs content increases to 5 wt%,the elasticity and tensile gauge factor of the composite conductive fibers decrease(ε=50.3%,GF=2.36),but higher stability and excellent temperature response performance(sensitivity C=-1.26%/℃,linearity R^(2)=0.98)are demonstrated.The research provides an important technical reference for the industrial production of flexible sensors.

关 键 词：热塑性聚氨酯 碳纳米管 柔性传感器 应变传感器 温度传感器 

分 类 号：TS195.644[轻工技术与工程—纺织化学与染整工程]