Preparation and Research of Flexible Humidity Sensor Based on Polyimide
In this study,polyamide acid(PAA)was used as the precursor,polyimide(PI)films can be obtained by heat treatment processes,and then graphene oxide(GO)was added to synthesize PI/GO composite film to obtain a polyimide-based parallel plate capacitive flexible humidity sensor.On this basis,the effects of interdigital electrode and parallel plate configura-tion,PAA spinning speed,PAA imide temperature and GO spray amount on the performance of the humidity sensor were deeply studied,and the final humidity sensor has good repeatability,fast response and recovery time,maximum hysteresis of 3.8%RH,and excellent flexible performance,which has a wide application prospect in the field of wearable flexible electronic devices.
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