Conduction mechanism in hot-pressed Poly(vinylidene fluoride)/Graphene Oxide composites

Mathew, S and Jan, H and Prasad, V (2023) Conduction mechanism in hot-pressed Poly(vinylidene fluoride)/Graphene Oxide composites. In: Physica B: Condensed Matter, 666 .

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Abstract

Poly(vinylidene fluoride)/Graphene Oxide (PVDF/GO) composites were prepared by solvent casting and processed by hot pressing. Filler GO is synthesized by the improved Hummers method and purified by centrifuging. GO is characterized by XRD, FTIR, RAMAN, SEM, and TEM. XRD, FTIR, and DSC techniques were employed to characterize composites. AC conductivity data of PVDF and PVDF/GO composites with varying GO content were fitted with Jonscher's power law at different temperatures, and the obtained DC conductivity was used to find the activation energy of the samples. The frequency exponent in power law is analyzed to identify the conduction mechanism in the composites. The frequency and temperature dependence of the exponent value and the nature of the frequency exponent with temperature confirm the overlapping large polaron tunneling as the responsible mechanism of conduction in PVDF/GO composites.

Item Type:	Journal Article
Publication:	Physica B: Condensed Matter
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to the Elsevier B.V.
Keywords:	AC conductivity; Composite; Graphene Oxide; Hot pressing; Poly(vinylidene fluoride).
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	27 Nov 2023 09:45
Last Modified:	27 Nov 2023 09:45
URI:	https://eprints.iisc.ac.in/id/eprint/82881

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