首页|Mechanically robust porous polyimide films for piezoelectric sensing at extreme condition
Mechanically robust porous polyimide films for piezoelectric sensing at extreme condition
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NETL
NSTL
Elsevier
The design and fabrication of piezoelectric materials with exceptional thermal stability for application in harsh environments remains a challenging. Herein, a three-dimensional porous fluorine-containing polyimide (PI) and zinc oxide (ZnO) composite self-powered piezoelectric sensor with high sensitivity and high-temperature resistance is prepared via the water vapor-induced fast phase separation method. The increased interface area within the PI film can produce enhanced piezoelectric properties by introducing a porous structure. The piezoelectric coefficient (d_(33)) of pure porous PI-0 film reached 3.3 pC/N. In addition, the addition of ZnO nanoparticles significantly improved the piezoelectric properties and thermal stability of composite porous films. The as-prepared sensor exhibits good piezoelectric characteristics with a voltage output of 4 V, excellent piezoelectric sensitivity (0.75 V·N~（-1）), fast response (15 ms), recovery time (20 ms) and outstanding durability (>9000 times). Furthermore, the composite porous PI films exhibit high flexibility, hydrophobicity, excellent high-temperature resistance with T_(d5%) up to 500℃. This study represents a novel kind of piezoelectric substrate for the design of high-performance self-powered piezoelectric sensors in aerospace and microelectronics.
Pengfei He、Jianwei Li、Bilin Zhang、Liangkang Huang、Yuanyuan Zhong、Shengping Li、Wei Fan、Fei Liu
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School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an, 710048, China
School of Textile Science and Engineering, Institute of Flexible Electronics and Intelligent Textile, Xi'an Polytechnic University, Xi'an, 710048, China
NETL
NSTL
Elsevier
