聚苯胺涂层经编织物的应变传感性能及其在呼吸监测中的应用

为制备呼吸监测智能服装用针织结构柔性传感器，首先通过等离子体对双经平结构的涤纶经编织物进行预处理，然后利用原位聚合法进行导电处理，分析了导电经编织物的微观结构与导电性能、应变-电阻传感性能，并探讨了其在呼吸监测智能内衣中的应用。结果表明：原位聚合法导电处理可赋予涤纶经编织物良好的导电性能，织物的电阻率较未处理时降低了约11个数量级；导电经编织物具有良好的应变-电阻传感性能，往复拉伸后电阻变化保持稳定，在6%和10%的应变条件下，其敏感因子分别为6和4左右；导电经编织物传感器具备良好的人体呼吸监测能力，不仅能记录呼吸的发生，还可监测呼吸的频率及强度。

Strain sensing property and respiration monitoring of polyaniline-coated warp-knitted fabrics

For preparation of knitted flexible sensor for respiratory monitoring in smart clothing, a two-bar tricot polyester warp-knitted fabric was pretreated by plasma followed by in-situ polymerization treatment for conductivity. The structure, electrical conductivity and strain-resistance sensing property of conductive warp-knitted fabric was investigated, and its application in respiratory monitoring smart underwear was also discussed. The results show that conductive treatment of in-situ polymerization gives the polyester warp-knitted fabric good electrical conductivity, and the resistivity of the fabric is about 11 orders of magnitude lower than that of the untreated. The resistance of conductive warp-knitted fabric decreases during stretching and recovers when shrinking, which shows good strain-resistance sensing characteristics. After a long time of reciprocating stretching, the resistance changes of the conductive warp-knitted fabric remain stable, and the gauge factors are about 6 and 4 at 6％ and 10％ strain conditions, respectively. The conductive warp-knitted fabric sensor demonstrates good ability to monitor human respiration, which can not only record the occurrence, but also monitor the rate and intensity of respiration.