Recent advances in the preparation of PVDF-based piezoelectric materials

• Published in: Nanotechnology reviews (Berlin) Vol. 11; no. 1; pp. 1386 - 1407
• Main Authors: Wu, Liangke, Jin, Zhaonan, Liu, Yaolu, Ning, Huiming, Liu, Xuyang, Alamusi, Hu, Ning
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 25.03.2022; Walter de Gruyter GmbH
• Subjects: Acid resistance; Aerospace engineering; Beta phase; Biocompatibility; Copolymers; Crystal structure; Energy; Energy harvesting; Fluorides; Lead zirconate titanates; Mechanical engineering; nanocomposites; Phase transitions; piezoelectric films; Piezoelectricity; poling; Polymer matrix composites; Polymers; Polyvinylidene fluorides; Process parameters; PVDF; Spectrum analysis; stretching
• ISSN: 2191-9097; 2191-9089; 2191-9097
• DOI: 10.1515/ntrev-2022-0082

In recent years, PVDF(polyvinylidene fluoride) and its copolymers have attracted great attention in the development of energy-harvesting devices because of their unique properties such as good flexibility, environmental friendliness, high halogen and acid resistance, lightweight and good biocompatibility. Compared to the most commonly used PZT (lead zirconate titanate), the piezoelectricity of PVDF and its copolymer-based materials is relatively low. To further expand the applications of PVDF, there is an urgent need for efficient methods to prepare high piezoelectric polymers or composites. In this work, the crystal phases are introduced first. Then, the preparation methods of PVDF and its copolymer-based materials are summarized, which are mainly focused on four determining factors of piezoelectricity. The mechanisms of piezoelectric β-phase formation and α- to β-phase transformation are introduced. The influence parameters of each process and their interactions are discussed in detail. In the last section, the progress of the preparation methods is summarized. This work will provide useful information to researchers working on piezoelectric composites.