大量程高韧导电硅橡胶复合材料压力传感器的研制  

Research and manufacture of large-range and high-toughness conductive silicon rubber composite pressure sensor

作　　者：吕双坤 彭曼琳 刘剑 盖卫明 姜瑞娟 梁国进 支春义 LYU Shuang-kun;PENG Man-lin;LIU Jian;GAI Wei-ming;JIANG Rui-juan;LIANG Guo-jin;ZHI Chun-yi(Songshan Lake Materials Laboratory,Dongguan 523000,China;Shenzhen Municipal Design&Research Institule Co Ltd,Shenzhen 518029,China;College of Engineering,City University of Hong Kong,Hongkong 999077,China)

机构地区：[1]松山湖材料实验室,广东东莞523000 [2]深圳市市政设计研究院有限公司,广东深圳518029 [3]香港城市大学工学院,中国香港999077

出　　处：《合成橡胶工业》2023年第6期509-518,共10页China Synthetic Rubber Industry

基　　金：深圳科创委资助项目(JSGG 20180508151728414);广东省科技厅资助项目(2018 B 020208001)。

摘　　要：基于纳米导电橡胶的压阻效应,使用基体材料硅橡胶、纳米超导电用炭黑、真丝纤维织物、叉指电极、缓冲高分子材料及封装模具,采用密炼、开炼、固化、封装等工艺制备了导电硅橡胶复合材料压力传感器,通过优化导电填料在硅橡胶基体中的含量制得了具有最佳压阻特性的导电硅橡胶复合材料,最后探究了封装压力传感器在桥梁支座模型上的应用性能。结果表明,当纳米超导电用炭黑BeaBlack CT-5质量分数为6.11%时,导电硅橡胶复合材料达到渗透阈值点,其压阻特性最佳;将真丝纤维织物植入导电硅橡胶所得的导电传感复合材料再与柔性叉指状单层电极进行结合并封装处理,可制备量程增大、探测灵敏、韧性增强的压力传感器;该压力传感器压力信号与电信号具有良好的线性关系,可以实现0~40 MPa范围内的压力探测;此外该压力传感器在桥梁支座模型测试中的测试值与理论值高度吻合。Based on the piezoresistive effect of nano conductive rubber,conductive silicone rubber composite pressure sensor was prepared using the matrix material silicone rubber,nano superconductive carbon black,silk fiber fabric,interdigital electrode,buffer polymer material and encapsulation mold by processes such as internal mixing,open mixing,vulcanization and encapsulating,and the conductive silicone rubber composite material with the optimal piezoresistive characteristics was prepared by optimizing the content of conductive filler in the silicone rubber matrix.Finally,the application performance of encapsulated pressure sensor on bridge support model was explored.The results showed that when mass faction of nano superconductive carbon black BeaBlack CT-5 was 6.11%,the conductive silicone rubber composite material reached the penetration threshold point and had the best piezoresistive characteristics;the conductive sensing composite material obtained by implanting silk fiber fabric into conductive silicone rubber was then combined with the flexible interdigital single-layer electrode and encapsulated to generate the pressure sensor with increased range,sensitive detection,and enhanced toughness;the pressure sensor had a good linear relationship between the pressure signal and the electrical signal,and could achieve pressure detection within the range of 0 to 40 MPa.In addition,the measured value of the pressure sensor in the bridge support model test were highly consistent with the theoretical value.

关 键 词：纳米导电硅橡胶 压力传感器 纳米超导电用炭黑 压阻效应 叉指状单层电极 灵敏度 应用性能 

分 类 号：TQ333.93[化学工程—橡胶工业]