李维， 肖珊， 邱夷平， 许福军^*

（  东华大学纺织学院，上海，201620；  ）

摘要： 柔性传感器的研究得到了越来越多的关注，其有容易操作，质量轻，良好生物相容性等优点。本文提出了一种基于多壁碳纳米管/聚乙烯醇复合纱线的线性湿敏开关传感器。该传感器的电阻在低相对湿度下几乎不变，当相对湿度高于75%以后，其电阻快速增大，显示出优异的湿敏开关特性。在100%相对湿度下，该传感器的灵敏度为1.89。湿敏特性主要由复合纱线中的聚乙烯醇在高湿度下的溶胀作用导致。这种湿敏开关传感材料可应用在柔性电子设备中监测湿度，比如应用于智能织物中以及其它工业应用中。
关键词： 纺织材料;碳纳米管纱线；湿敏开关特性；柔性传感器；电阻性能

Li Wei， Xiao Shan， Qiu Yiping， Xu Fujun^*

（  Textile School, Donghua University, Shanghai, 201620；  ）

Abstract： The research of flexible sensor gets more and more attention. It is easy to operate, light and has good biocompatibility, etc. A yarn-like switch-type humidity sensing material is fabricated by infiltrating hydrophilic water-swellable polyvinyl alcohol (PVA) into a multi-walled carbon nanotube (MWCNT) yarn. The electrical resistance of the virgin humidity sensing material remains almost constant at low relative humidity (RH), and then increases sharply as the RH increases above 75%, showing a good humidity switch characteristic. The sensitivity of the sensing material can reach up to 1.89 at 100% RH. Humidity sensitive characteristic is mainly result from the swelling of PVA of composite yarns at high humidity. The promising multi-functional material may be used for real-time RH switch monitoring in flexible electronic devices, such as in intelligent textiles and other industrial applications.
Keywords： Textile materials; Carbon nanotube yarn; Humidity switch material; Flexible sensor; Electrical resistance

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