Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (12): 1411-1419.DOI: 10.11944/j.issn.1000-0518.2020.12.200133

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Fabrication and Piezoelectric Properties of Polyvinylidene Fluoride Composites with High β Phase

MA Antonga,b, FU Chaoa, CHU Huiyinga,b, RAN Xianghaia,b*, NIE Weia,b*   

  1. aLaboratory of Polymer Composites Engineering,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;
    bUniversity of Science and Technology of China,Hefei 230026,China
  • Received:2020-05-08 Revised:2020-06-04 Accepted:2020-06-16 Published:2020-12-01 Online:2020-12-07
  • Contact: RAN Xianghai,professor; Tel/Fax:0431-85262677; E-mail:ranxh@ciac.ac.cn; Research interests:fluoropolymer functional materials
    Co-corresponding author:NIE Wei,professor; Tel/Fax:0431-85262232; E-mail:wnie@ciac.ac.cn; Research interests:special seal protection materials

Abstract: A high content of the electroactive β phase in polyvinylidene fluoride (PVDF) is one of the prerequisites for achieving excellent piezoresponse and sensing in flexible sensors and wearable electronic devices. Herein, three types of nanoparticles of ZnO, Ag, and their composite (Ag-ZnO) were successfully synthesized by hydrothermal method and compounded with PVDF. The morphological, crystallization and piezoelectric properties of PVDF composites were systematically characterized. The synergistic effect of Ag-ZnO nanoparticles promotes crystallization and piezoelectric properties of PVDF. What's more, after stretching, the amount of β phase of all the PVDF films is further improved, the highest β phase content is 70.0% for stretched PVDF/Ag-ZnO nanoparticles, and the best piezoelectric coefficient (d33) is 31.0 pC/N.

Key words: polyvinylidene fluoride, β phase, nanoparticles, stretching, piezoelectric coefficient

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