文献类型：期刊文献

英文题名：Heterogeneous layer-structured multiphase composite piezoelectret: Fabrication, piezoelectric performance, and application in electromechanical transduction

作者：Wu, Shiyu[1];Qiu, Xunlin[1,2];Gao, Tiantian[1];Hu, Zheng[1,2];Xiang, Yanxun[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China;[2]Shanghai Inst Aircraft Mech & Control, 100 Zhangwu Rd, Shanghai 200092, Peoples R China

年份：2025

卷号：15

期号：4

外文期刊名：AIP ADVANCES

收录：;EI(收录号：20251418185691);WOS:【SCI-EXPANDED(收录号:WOS:001458957800006)】；

基金：Financial support from the National Natural Science Foundation of China (Grant Nos. 12174102 and 12304511) and from the Shanghai Gaofeng Project for University Academic Program Development is gratefully acknowledged.

语种：英文

外文关键词：Blood vessels - Elastomers - Electromechanical actuators - High temperature applications - Ionomers - Mechanical actuators - Microchannels - Piezoelectric actuators - Piezoelectric transducers - Piezoelectricity - Plastic films - Reinforced plastics - Stress analysis

摘要：Piezoelectrets exhibit large piezoelectric sensitivity and high mechanical flexibility, widely employed in sensors, actuators, energy harvesters, etc. In this paper, a heterogeneous-structured multiphase composite piezoelectret (MPCP) was prepared using fluorinated ethylene propylene copolymer (Teflon FEP, 50 mu m in thickness), polydimethylsiloxane (PDMS), and polypropylene (PP, 5.8 mu m in thickness) films via corona charging, high-temperature curing, and layer stacking techniques. It is shown that the piezoelectric d(33) coefficient of the MPCP film reaches a maximum value of about 80 pC N-1 when the surface potential of the FEP film is about 1000 V and the thickness of the PDMS layer is about 80 mu m. The d(33) coefficient remains stable during two months of storage under laboratory conditions. In addition, the d(33) coefficient remains unchanged over 22 000 cycles with a sinusoidal driving force at a frequency of 2 Hz and an amplitude of 1 N. It is found that the d 33 coefficient of the MPCP film is strongly dependent on the applied static pressure and the frequency of the dynamic pressure. In addition, the absence of macroscopic air-filled cavities in the MPCP film renders it excellent stability with respect to varying environmental pressure, largely broadening its application scenarios. Due to its large piezoelectric sensitivity and excellent environmental stability, the MPCP sensing film developed here shows promising potential for applications in fields such as flexible sensors, health monitoring, human-computer interfaces, etc.