基于聚氨酯/炭黑/锦纶导电纱线的织物应变传感器制备及其性能  

Preparation and performance of fabric sensor based on polyurethane/carbon black/polyamide conductive yarn

作　　者：阳腾 孙志慧 伍思钰 于晖 王飞 YANG Teng;SUN Zhihui;WU Siyu;YU Hui;WANG Fei(College of Textile Materials and Engineering,Wuyi University,Jiangmen,Guangdong 529000,China)

机构地区：[1]五邑大学纺织材料与工程学院,广东江门529000

出　　处：《纺织学报》2024年第12期80-88,共9页Journal of Textile Research

基　　金：广东省教育厅创新强校重点领域专项项目(2020ZDZX2038)。

摘　　要：镀银锦纶纱线制备的织物应变传感器存在镀层氧化腐蚀的问题,影响测量精度,严重时可致传感器失效。为改善织物应变传感器的环境稳定性,基于同轴湿法纺丝技术制备以锦纶(PA)纱线为芯层,聚氨酯(TPU)和炭黑(CB)复合材料为皮层的芯鞘结构的TPU/CB/PA导电纱线,然后将其作为嵌花部分与成品氨纶纱线共同编织成针织物应变传感器,该传感器样品采用平针、1×1罗纹、双罗纹、双反面4种针织组织编织。同时探究了组织结构、导电嵌花图案类型以及导电部分嵌花密度对传感器性能的影响。结果表明:平针组织和1×1罗纹组织的传感器样品采用间隔导电电路制备方式在30%~45%的应变传感范围内可有效提升传感器的信号稳定性,疲劳寿命至少为500次;织物密度减小可扩大传感器的有效应变传感范围(20%~50%)。此传感器能够初步实现对不同呼吸深度的监测以及关节运动幅度的监测。Objective The fabric strain sensor made of silver-coated nylon yarn has the problem of coating oxidation corrosion,which affects the measurement accuracy and can cause the sensor failure.In order to improve the environmental stability of fabric strain sensor,a new design concept is proposed in this paper,where TPU/CB/PA conductive yarns with polyamide(PA)yarn as core layer and polyurethane(TPU)and carbon black(CB)composite material as core sheath structure were prepared based on coaxial wet spinning technology.Then the conductive yarns were knitted together with finished spandex yarns to form a knitted fabric strain sensor.Due to the absence of active chemical elements,this type of sensor theoretically has the advantages of oxidation resistance,corrosion resistance and sweat resistance.Method TPU/CB/PA conductive yarns with polyamide(PA)yarn as core layer and polyurethane(TPU)and carbon black(CB)composite material as core sheath structure were prepared based on coaxial wet spinning technology.The conductive yarn was knitted together with spandex yarn as an inlaid part for fabric strain sensor.The sensor samples were prepared with four types of knitted structures,namely plain grain,1×1 rib,double rib,double reverse,four different Mosaic schemes and different densities.When the external strain was applied to the sensor,the conductive part of the coil was deformed,so that the sensor resistance changed,and the received mechanical signal was converted into an electrical signal output.Different strains made the degree of deformation of the coil different.In this paper,the resistance change of the sensor under 5%-50%tensile strain is measured to study the performance of the sensor and its influence parameters.Results The prepared conductive yarn skin and core layer were tightly bonded.The resistance value of the 5 cm length of the yarn was within 27-31 kΩ,indicating relatively stable resistance,and the resistance value met the requirements of the preparation of the sensor.The sensor properties of the four types of str

关 键 词：织物应变传感器 针织物 湿法纺丝 呼吸监测 运动监测 导电纱线 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TS181[自动化与计算机技术—控制科学与工程]