Ag/Cu NWs/棉织物复合材料的制备及压力传感性能OA

In order to improve the sensing properties of the pressure sensors,two flexible pressure sensors with high sensitivity and fast response/recovery time were prepared via combining impregna-tion-drying synthesis method with displacement reaction.Firstly,the Cu NWs were synthesized via the hydrothermal reduction method,and Cu NWs were then loaded on the surface of cotton fibers by impregnation experiments to obtain pressure flexible sensors of Cu NWs/cotton fabric com-posites.The pressure flexible sensors of the Ag/Cu NWs/cotton fabrics composites were prepared based on the above sensors;due to the good conductivity of silver,the Ag particles were reduced and loaded on the surface of Cu NWs via the displacement reaction.A series of structural charac-terization and flexible pressure sensing performance tests were performed on the two composites.The results show that the Cu NWs/cotton fabric pressure sensor exhibits a sensitivity of 1.76 kPa-1,and that the introduction of silver nanoparticles reduces the resistance of the Ag/Cu NWs/cotton fabric composite material,and improves their sensing performance.Specifically the sensitivity rea-ches the highest 2.48 kPa-1,the sensing range is 0.26～1.05 kPa,and the response/recovery time is 300 ms and 200 ms,respectively.The performance of the sensor is optimized,which can be used as an excellent flexible pressure sensor.This study provides an effective reference for improving the performance of flexible pressure sensors.