Design, synthesis and processing of PVDF-based dielectric polymers

• Published in: IET Nanodielectrics Vol. 1; no. 2; pp. 80 - 91
• Main Authors: Wang, Shan, Li, Qi
• Format: Journal Article
• Language: English
• Published: Beijing The Institution of Engineering and Technology 01.07.2018; John Wiley & Sons, Inc; Wiley
• Subjects: Actuators; Addition polymerization; anti-FE-like dielectric response; Behavior; Chemical synthesis; Crystal structure; dielectric polarisation; dielectric polarisation behaviour; Dielectric polarization; dielectric polymers; Dielectric properties; Dielectric relaxation; dielectric thin films; Electric fields; electrocaloric refrigeration; Energy storage; Entropy; ferroelectric ceramics; ferroelectric materials; ferroelectric properties; ferroelectric transitions; Ferroelectricity; film capacitors; Fluorides; Fluoropolymers; Molecular structure; non-volatile memories; normal FE; permittivity; Phase transitions; piezoelectric properties; piezoelectric sensors; Piezoelectricity; poly(vinylidenefluoride)-based dielectric polymers; polymer films; Polymers; Polyvinylidene fluorides; PVDF homopolymer; PVDF-based dielectric polymers; pyroelectric properties; pyroelectric sensors; pyroelectricity; Random access memory; relaxor FE; relaxor ferroelectrics; Review Article; Sensors; Temperature; Vinylidene fluoride; ferroelectric ceramics; normal FE; dielectric polarisation behaviour; non-volatile memories; relaxor FE; actuators; electrocaloric refrigeration; ferroelectric materials; dielectric polarisation; piezoelectric sensors; dielectric polymers; permittivity; poly(vinylidenefluoride)-based dielectric polymers; pyroelectricity; pyroelectric sensors; anti-FE-like dielectric response; dielectric properties; polymer films; ferroelectric transitions; film capacitors; relaxor ferroelectrics; chemical synthesis; molecular structure; piezoelectricity; dielectric thin films; pyroelectric properties; crystal structure; ferroelectric properties; piezoelectric properties; PVDF-based dielectric polymers; PVDF homopolymer
• ISSN: 2514-3255; 2514-3255
• DOI: 10.1049/iet-nde.2018.0003

Due to the appealing piezoelectric, pyroelectric, and ferroelectric (FE) properties, poly(vinylidene fluoride) (PVDF)-based dielectric polymers have been attracting great attention from both the academic and industrial communities. Depending on the molecular structure and the processing method, PVDF-based dielectric polymers can exhibit rich dielectric polarisation behaviours covering normal FE, relaxor FE, anti-FE-like and linear dielectric responses, which enables a wide spectrum of application fields such as non-volatile memories, piezoelectric and pyroelectric sensors, actuators, electrocaloric refrigeration, and film capacitors. In this study, the authors first briefly introduce the current practical/promising applications of PVDF-based dielectric polymers, and the corresponding optimum dielectric polarisation behaviour and crystal structure are proposed accordingly. The chemical synthesis and modification strategies for obtaining various fluoropolymers beyond PVDF homopolymer are then summarised with an emphasis on the relationship between the molecular structure and the dielectric polarisation behaviour. In addition, the effect of processing methods on the crystal structure and dielectric properties of the PVDF-based polymers is discussed. Finally, some newly developed processing techniques applicable to PVDF-based polymers are described.