Enhancing functional properties of PVDF-HFP/BZT-BCT polymer-ceramic composites by surface hydroxylation of ceramic fillers

Dash, S and Thakur, VN and Kumar, A and Mahaling, RN and Patel, S and Thomas, R and Sahoo, B and Pradhan, DK (2021) Enhancing functional properties of PVDF-HFP/BZT-BCT polymer-ceramic composites by surface hydroxylation of ceramic fillers. In: Ceramics International .

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Abstract

We report the mechanism to enhance the dielectric and ferroelectric behavior of polymer-ceramic composites through surface hydroxylation of 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BZT-BCT) ceramic filler-particles embedded in PVDF-HFP copolymer matrix. Varying the hydroxylated h-(BZT-BCT) filler particle-content (� = 0�40 wt) in PVDF-HFP copolymer matrix, composite films (of ~75 μm thickness) were prepared. We observed that, with an increase in filler content up to an optimum concentration of 15 wt, a microstructure with gradually denser particle-arrangement and enhanced particles-polymer surface interaction is exhibited, which leads to improved dielectric and ferroelectric behavior. The energy storage density (728 mJ/cm3 at an electric field of 750 kV/cm) of the composite with 15 wt of h-(BZT-BCT) is found to be much higher than those of the pure BZT-BCT sample, pure PVDF-HFP copolymer and their composites. Our work demonstrates the method of enhancing the functional properties through a suitable microstructure of composite materials with surface-hydroxylation of filler particles. © 2021 Elsevier Ltd and Techna Group S.r.l.

Item Type:	Journal Article
Publication:	Ceramics International
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd
Keywords:	Ceramic materials; Composite films; Dielectric properties of solids; Electric fields; Ferroelectricity; Filled polymers; Hydroxylation; Microstructure; Polymer matrix composites, Ceramic fillers; Dielectric behavior; Dielectrics property; Ferroelectric property; Filler particles; Functional properties; Interfacial interaction; Polymer ceramic composite; PVDF-HFP copolymer; Surface hydroxylations, Fillers
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	03 Dec 2021 07:04
Last Modified:	03 Dec 2021 07:04
URI:	http://eprints.iisc.ac.in/id/eprint/70117

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