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 

机构地区：[1]Center for Soft Condensed Matter Physics and Interdisciplinary Research,Soochow University,Suzhou,215123,China [2]School of Optoelectronics Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou,215006,China [3]Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou,215006,China

出　　处：《Chinese Journal of Polymer Science》2022年第7期799-806,共8页高分子科学（英文版）

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)。

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.

关 键 词：Poly(vinylidene fluoride) PIEZOELECTRICITY Electrostatic interactions HOT-PRESSING 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]