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Journey of Electroactive beta-Polymorph of Poly(vinylidenefluoride) from Crystal Growth to Design to Applications

Gebrekrstos, Amanuel and Madras, Giridhar and Bose, Suryasarathi (2019) Journey of Electroactive beta-Polymorph of Poly(vinylidenefluoride) from Crystal Growth to Design to Applications. In: CRYSTAL GROWTH & DESIGN, 19 (9). pp. 5441-5456.

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Official URL: https://dx.doi.org/10.1021/acs.cgd.9b00381

Abstract

Electroactive polymers are ideal candidates for dielectric and piezoelectric applications due to their very high breakdown strength, good flexibility, and ease of processing. Among the various polymers, poly(vinylidenefluoride) (PVDF) is of special interest due to potential applications in sensors, capacitors, actuators, etc. PVDF exists in four different crystalline phases (alpha-, beta-, gamma-, and delta-phases). Among these, the electroactive beta-phase is very important for dielectric and piezoelectric applications. In the recent past, research has been focused on obtaining the maximum amount of electroactive beta-polymorph in PVDF. The piezoelectric and dielectric properties of PVDF are influenced by the amount and the possible orientation of the polar beta-phase. However, the effect of orientation on the electroactive beta-phase in the field direction toward improving dielectric and piezoelectric applications is still not clear. This review attempts to bring in mechanistic insights into various processes that induce the electroactive beta-phase, orientation, and correlation with dielectric and piezoelectric properties in PVDF-based composites. Some of the challenges and possible solutions for the future fabrication of piezoelectric materials are also emphasized.

Item Type: Journal Article
Additional Information: copyright for this article belongs to AMER CHEMICAL SOC
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 29 Oct 2019 10:41
Last Modified: 29 Oct 2019 10:41
URI: http://eprints.iisc.ac.in/id/eprint/63728

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