Title:
β PHASE POLYVINYLIDENE FLUORIDE-BASED PIEZO-COMPOSITE AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/029428
Kind Code:
A1
Abstract:
The present invention relates to a β phase polyvinylidene fluoride-based piezo-composite comprising β phase polyvinylidene fluoride and a molecular ferroelectric having a plurality of polar axes, the β phase polyvinylidene fluoride occupying 85%-96% of the mass fraction of the piezo-composite. The present invention also provides a preparation method therefor, comprising: uniformly mixing and dissolving PVDF and the molecular ferroelectric having a plurality of polar axes in an organic solvent to obtain a mixed solution, the mass ratio of polyvinylidene fluoride to the molecular ferroelectric being 99:1-4:1, the sum of the mass of polyvinylidene fluoride and the molecular ferroelectric accounting for 1%-15% of the mass fraction of the mixed solution; and subjecting the mixed solution to evaporation and crystallization to obtain a β phase polyvinylidene fluoride-based piezo-composite. The piezo-composite of the present invention has a high content of β phase polyvinylidene fluoride, stable properties, and better piezoelectricity, and the preparation method is simple and easy to operate.
Inventors:
HU ZHIJUN (CN)
LI QINGQING (CN)
LI QINGQING (CN)
Application Number:
PCT/CN2018/111064
Publication Date:
February 13, 2020
Filing Date:
October 19, 2018
Export Citation:
Assignee:
ZHANGJIAGANG INST IND TECH SOOCHOW UNIV (CN)
UNIV SOOCHOW (CN)
UNIV SOOCHOW (CN)
International Classes:
C08J5/18; C08L27/16; C08K5/3462; C08K5/55; H01L41/193
Foreign References:
| CN106751250A | 2017-05-31 | |||
| CN101045795A | 2007-10-03 | |||
| CN105385077A | 2016-03-09 | |||
| KR20110112528A | 2011-10-13 |
Other References:
SUI, YAN ET AL.: "Enhanced Switchable Dielectric Performance of beta-Pha- se-Dominated PVDF Composite Films Modified with Single-Protonated 1, 4- Diazabicyclo[2.2.2]octane Fluoborate", J. PHYS. CHEM. C., vol. 121, no. 25, 19 June 2017 (2017-06-19), pages 13586 - 13592, XP055685137
Attorney, Agent or Firm:
CENTRAL SOUTH WELL INTELLECTUAL PROPERTY OFFICE (CN)
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