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Open AccessArticle

Dielectric Properties of Graphene/Titania/Polyvinylidene Fluoride (G/TiO2/PVDF) Nanocomposites

1
Institute of Chemistry, University of the Punjab, Lahore 54590, Pakistan
2
School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia
3
The ARC Research Hub for Graphene Enabled Industry Transformation, The University of Adelaide, Adelaide, SA 5005, Australia
4
Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(1), 205; https://doi.org/10.3390/ma13010205
Received: 24 November 2019 / Revised: 18 December 2019 / Accepted: 31 December 2019 / Published: 3 January 2020
(This article belongs to the Special Issue Multifunctional Materials & Composites)
Flexible electronics have gained eminent importance in recent years due to their high mechanical strength and resistance to environmental conditions, along with their effective energy storage and energy generating abilities. In this work, graphene/ceramic/polymer based flexible dielectric nanocomposites have been prepared and their dielectric properties were characterized. The composite was formulated by combining graphene with rutile and anatase titania, and polyvinylidene fluoride in different weight ratios to achieve optimized dielectric properties and flexibility. After preparation, composites were characterized for their morphologies, structures, functional groups, thermal stability and dielectric characterizations by using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, thermal gravimetric analysis and impedance spectroscopy. Dielectric results showed that prepared flexible composite exhibited dielectric constant of 70.4 with minor leakage current (tanδ) i.e., 0.39 at 100 Hz. These results were further confirmed by calculating alternating current (AC) conductivity and electric modulus which ensured that prepared material is efficient dielectric material which may be employed in electronic industry for development of next generation flexible energy storage devices. View Full-Text
Keywords: graphene; titania; polyvinylidene fluoride; nanocomposite; dielectric properties graphene; titania; polyvinylidene fluoride; nanocomposite; dielectric properties
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MDPI and ACS Style

Ishaq, S.; Kanwal, F.; Atiq, S.; Moussa, M.; Azhar, U.; Losic, D. Dielectric Properties of Graphene/Titania/Polyvinylidene Fluoride (G/TiO2/PVDF) Nanocomposites. Materials 2020, 13, 205.

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