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Type: Journal article
Title: Synthesis of three phase graphene/titania/polydimethylsiloxane nanocomposite films and revealing their dielectric and impedance properties
Author: Ishaq, S.
Kanwal, F.
Atiq, S.
Moussa, M.
Losic, D.
Citation: Ceramics International, 2019; 45(7):8713-8720
Publisher: Elsevier
Issue Date: 2019
ISSN: 0272-8842
Statement of
Saira Ishaq, Farah Kanwal, Shahid Atiq, Mahmoud Moussa, Dusan Losic
Abstract: Compounds and composites with high dielectric performance are in high demand in electronic industry due to their ability to store more charge and lower energy dissipation. In this paper we present synthesis of flexible three phase nanocomposite films of graphene/titania/polydimethylsiloxane with reasonably high real part of permittivity and very low imaginary part of permittivity. Dielectric permittivity of polydimethylsiloxane was raised by addition of graphene and rutile titania used as conducting and ceramic additives, respectively added in various weight ratios. Dielectric studies of synthesized three phase graphene/titania/polydimethylsiloxane nanocomposite films with weight/weight of 2:15:20 exhibits dielectric permittivity of 34.8 even at very high frequency of 2 MHz. While loss tangent of the same three phase graphene/titania/polydimethylsiloxane nanocomposite film is as low as 0.01 and its AC conductivity is 4.3 × 10⁻⁵ Sm⁻¹. Complex impedance and complex electric modulus of three phase graphene/titania/polydimethylsiloxane nanocomposite films also confirm its capacitive behaviour. Based on these properties and results we propose that these type of three phase graphene/titania/polydimethylsiloxane nanocomposite films can be used as useful dielectric materials in energy storage devices.
Keywords: Graphene; titania; polydimethylsiloxane; dielectric permittivity; AC conductivity
Rights: © 2019 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
DOI: 10.1016/j.ceramint.2019.01.194
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