Modified sepiolite/PVDF‐HFP composite film with enhanced piezoelectric and dielectric properties

ABSTRACT Flexible film with both piezoelectric and dielectric properties is considered to be a potential candidate for the energy conversion and storage devices. In this study, the Li+ and H2O modified sepiolite/poly(vinylidene fluoride‐co‐hexafluoropropylene) (LiSEP‐H2O/PVDF‐HFP) composite films wi...

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Bibliographic Details
Published in:Journal of applied polymer science 2020-03, Vol.137 (9), p.n/a
Main Authors: Zhang, Shaojie, Tong, Wangshu, Wang, Jiang, Wang, Wenjiang, Wang, Zhihao, Zhang, Yihe
Format: Article
Language:English
Subjects:
adsorbed water
Circuits
Clay minerals
dielectric
Dielectric properties
Electric properties
Energy conversion
Energy storage
Hydrogen bonds
Materials science
Permittivity
piezoelectric
Piezoelectricity
Polymers
PVDF‐HFP
Sepiolite
Vinylidene
Vinylidene fluoride
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Summary:ABSTRACT Flexible film with both piezoelectric and dielectric properties is considered to be a potential candidate for the energy conversion and storage devices. In this study, the Li+ and H2O modified sepiolite/poly(vinylidene fluoride‐co‐hexafluoropropylene) (LiSEP‐H2O/PVDF‐HFP) composite films with both good piezoelectric and dielectric properties were prepared by traditional coating process. When the H2O content was 13 wt %, the LiSEP‐H2O/PVDF‐HFP composite exhibited high d33 of 32 and dielectric constant of 48. Moreover, the effects of the Li+ and adsorbed H2O on the d33, F(β), dielectric constant, short‐circuit currents were discussed. The adsorbed H2O enhanced the β‐phase by the hydrogen bonds and Li+ improved the polarization to realize the composite film with increased piezoelectric and dielectric properties respectively. We expected the common modification to lead other clay minerals realizing the future applications in the adjustment of composites' electric properties. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48412. A sketch map of the preparation of pure and composite films.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.48412