导电复合材料涂覆式全织物基柔性压阻传感器制备  

Preparation of all-fabric flexible piezoresistive sensors based on conductive composite coating

作　　者：肖渊[1,2] 童垚 胡呈安 武贤军 杨磊鹏 XIAO Yuan;TONG Yao;HU Cheng′an;WU Xianjun;YANG Leipeng(College of Electrical and Mechanical Engineering,Xi′an Polytechnic University,Xi′an,Shaanxi 710048,China;Xi′an Key Laboratory of Modern Intelligent Textile Equipment,Xi′an,Shaanxi 710048,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048 [2]西安市现代智能纺织装备重点实验室,陕西西安710048

出　　处：《纺织学报》2024年第10期152-160,共9页Journal of Textile Research

摘　　要：针对目前织物基柔性压阻传感器制备工艺相对复杂、导电材料与织物结合度有限等问题,提出以聚二甲基硅氧烷(PDMS)-多壁碳纳米管(MWCNTs)/炭黑(CB)为导电复合材料涂覆非织造布制备压敏层,采用微滴喷射技术在织物表面直接成形叉指型金属电极,制备织物基柔性压阻传感器的方法。当CB与MWCNTs质量比为3∶2时,对不同MWCNTs填充量下导电复合材料形态及制备的压敏层微观形貌观察,并研究其对传感器灵敏度的影响,最后对制得传感器的性能及应用进行测试。结果表明:导电材料在PDMS中分散均匀,导电复合材料与织物结合紧密;当MWCNTs质量分数为2.5%时,所制传感器灵敏度最高可达0.353 kPa^(-1),检测范围为0~25 kPa,响应/恢复时间为150/200 ms,最低检测限约为49 Pa,具有良好的重复稳定性(约1 600次)。此外,该传感器可识别出手指按压以及手指和腕部弯曲的压力信号,可应用于人体健康、运动等信号监测。Objective Smart textiles are a new type of textile material that highly integrates flexible electronic devices with fabrics,which has great application potential in medical health and sports monitoring.The fabrication of flexible piezoresistive sensors,which enable the interaction between the human body and external information,is crucial for achieving smartness in textiles.Addressing the challenges posed by the intricate preparation process of flexible piezoresistive sensors and the integration of conductive materials with fabrics,this study presents a fabric-based approach to overcome these limitations.Method Polydimethylsiloxane-multi-walled carbon nanotubes/carbon black(PDMS-MWCNTs/CB)was used as a conductive composite material for coating non-woven fabric,aiming to fabricate a piezoresistive layer.Microdrop injection technique was utilized to pattern fork-finger metal electrodes directly on the fabric surface,thereby facilitating the construction of flexible piezoresistive sensors based on fabric.Characterization and analysis of the fabric metal electrodes,conductive composites,piezoresistive layers,and sensors were carried out using an RTS-4 four-probe tester,field-emission scanning electron microscope,tensiometer,digital bridge,and a self-assembled cyclic recirculation device.Results Conductive composites with different mass ratios of CB and MWCNTs were prepared,and the piezoresistive properties of the conductive composites with varying ratios of mass were investigated.The results showed that the resistance increment(R 0-R)of conductive composites tended to increase and then decrease with the increase of CB content under the same pressure.When the mass ratio was 3∶2,the conductive composites exhibited superior piezoresistive response characteristics.Conductive composites and pressure-sensitive layers,incorporating MWCNTs with varying filling contents,were fabricated and investigated.The study encompassed morphological examination of the conductive composites and microstructural analysis of the pressure-s

关 键 词：柔性压力传感器 棉织物 非织造布 导电复合材料 涂覆法 银电极 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]