Excellent-Moisture-Resistance Fluorinated Polyimide Composite Film and Self-Powered Acoustic Sensing

As a clean, sustainable energy source, sound can carrya wealthof information and play a huge role in the Internet of Things era.In recent years, triboelectric acoustic sensors have received increasingattention due to the advantages of self-power supply and high sensitivity.However, the triboelectric charge is susceptible to ambient humidity,which reduces the reliability of the sensor and limits the applicationscenarios significantly. In this paper, a highly moisture-resistantfluorinated polyimide composited with an amorphous fluoropolymer filmwas prepared. The charge injection performance, triboelectric performance,and moisture resistance of the composite film were investigated. Inaddition, we developed a self-powered, highly sensitive, and moisture-resistantporous-structure acoustic sensor based on contact electrification.The detection characteristics of the acoustic sensor are also obtained.

Automated summary

In this paper, a highly moisture-resistant fluorinated polyimide composited with an amorphous fluoropolymer film was prepared. The charge injection performance, triboelectric performance, and moisture resistance of the composite film were investigated. In addition, a self-powered, highly sensitive, and moisture-resistant porous-structure acoustic sensor based on contact electrification was developed, and the detection characteristics of the acoustic sensor were obtained.