基于Ag NWs/棉织物柔性压力传感器的制备及性能

Preparation and properties of flexible pressure sensor based on Ag NWs/cotton fabric

针对柔性传感器制造工艺繁琐、成本昂贵等缺点,以银纳米线(Ag NWs)为导电物质,以棉织物为弹性基体,采用反复浸渍的方法制备出一类具有良好弹性的柔性压力传感器。实验结果显示,棉织物经Ag NWs浸渍后,Ag NWs可均匀包裹在棉纤维上,形成有效的导电网络,且具有一定的柔性。此外Ag NWs的含量越高,Ag NWs对织物的导电性越好。在5次浸渍后,Ag NWs/棉织物内部形成稳定的导电网状结构,其检测灵敏度可达到3.36 kPa^(-1)。在压力为1.74~7.60 kPa范围内,此传感器对压力的响应和松弛时间均为50 ms。证明所研制的压力传感器具有较好的传感性能,可以作为一种优良的柔性压力传感器使用。

In response to the drawbacks of complex manufacturing process and high cost of flexible sensors,a series of flexible pressure sensor with good elasticity were prepared by repeated impregnation with silver nanowires(Ag NWs)as conductive material and cotton fabric as elastic matrix.The experimental results show that the cotton fabric can be uniformly wrapped around cotton fibers after being impregnated with Ag NWs,forming an effective conductive network and having a certain degree of flexibility.In addition,the higher the content of Ag NWs,the better the conductivity of Ag NWs to the fabrics.After 5 times of impregnation,the Ag NWs/cotton fabric formed a stable conductive network structure,and its detection sensitivity is up to 3.36 kPa^(-1).The response and relaxation time of the sensor is 50 ms for the pressure ranging from 1.74 to 7.60 kPa.The developed pressure sensor reveals excellent sensing properties and it can be used as an excellent flexible pressure sensor.