Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (4): 1114.doi: 10.7503/cjcu20200636

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Progress on the Design and Fabrication of High Performance Piezoelectric Flexible Materials Based on Polyvinylidene Fluoride

ZHANG Shuting, AN Qi()   

  1. School of Materials Sciences and Technology,China University of Geosciences,Beijing 100083,China
  • Received:2020-09-01 Online:2021-04-10 Published:2021-02-03
  • Contact: AN Qi E-mail:an@cugb.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(21922203);the Fundamental Research Funds for the Central Universities, China(2652019160)

Abstract:

Piezoelectricity presents important applications in the fields of energy conversion, sensor, medical materials, wearable electronics and so forth, and receives widespread scientific attentions. Among all types of piezoelectrical materials, poly(vinylidene fluoride)(PVDF) and its copolymers have the unique merits of being flexible, easily processable, stable, and biocompatible. Thus they have received a lot of research efforts. This article reviews the progresses on enhancing the piezoelectricity of PVDF from two dimensions which are the fabrication method and the compositing strategy. Based on the discussion of the piezoelectrical mechanism of PVDF, a series of strategies including casting, electrospinning, wire drawing, and nanocomfinement are introduced. In addition, piezoelectricity promoting strategies via compositing with fillers including small molecules, polymers, graphene-based particles, and inorganic nanoparticles are also reviewed. These strategies all benefit the formation of the piezoelectrically active β phase in PVDF. Lastly, the article discusses the remaining challenges and prospects in the design and preparation of high-performance piezoelectric PVDF-based materials. We expect that the article benefits the development of PVDF-based piezoelectrical materials, and inspires the design of materials in the fields of energy, environments, medicine and healthcare.

Key words: Poly(vinylidene fluoride)(PVDF), Piezoelectricity, Fabrication process, Composite material

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