Polar Phase Formation and Piezoelectricity of PVDF by Hot-pressing under Electrostatic Intermolecular Interactions

作     者：Jing-Hua Zhao Bao-Sheng He Ao-Shen Li Chao-Nan Wang Qing-Qing Li Zhi-Jun Hu Jing-Hua Zhao;Bao-Sheng He;Ao-Shen Li;Chao-Nan Wang;Qing-Qing Li;Zhi-Jun Hu

作者机构：Center for Soft Condensed Matter Physics and Interdisciplinary ResearchSoochow UniversitySuzhou215123China School of Optoelectronics Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou215006China Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of ChinaSoochow UniversitySuzhou215006China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2022年第40卷第7期

页      面：799-806页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51973150 and 21674076) the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.19KJA320009) a Project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。 

主　　题：Poly(vinylidene fluoride) Piezoelectricity Electrostatic interactions Hot-pressing 

摘      要：Piezoelectric poly(vinylidene fluoride)(PVDF)has received considerable attention due to its ability of interconverting mechanical into electric energies and potential applications in wearable electronics.To achieve piezoelectricity,it is important to simultaneously control the formation of polar phases,crystallinity,and dipole alignments in PVDF-based films.Here we demonstrate that piezoelectricity can be obtained by directly hot-pressing PVDF films sandwiched between chitosan or cellulose films.The electrostatic interactions between PVDF and chitosan or cellulose enabled an exceptional high content of polar phases(β-andγ-phases)up to 90%and a measured piezoelectric charge coefficient d_(33)of up to-30 pC/N.This study provides a simple and low-cost approach for obtaining piezoelectric PVDF films used for sensors,actuators,and energy harvesters.