Abstract
Our articles describe the casting process for producing polyvinyl alcohol (PVA)/polyethylene oxide (PEO)/graphene nanoplates (GNPTs) nanocomposites' films. The influence of different concentrations (0.0, 0.05, 0.1, 0.5, and 1%) of GNPTs on the structural, optical, electrical, and dielectric properties of PVA/PEO nanocomposites have been investigated by a Fourier transform infrared (FTIR), X-ray diffraction (XRD), UV\vis spectroscopy, and impedance analyzer. The XRD of the nanocomposite films confirms the enhanced degree of amorphously in the PEO/PVA virgin polymer because of the addition of the GNPTs as nanofiller. The crystallinity decreased from 38.34 to 15.72. The FTIR approves the complexations or interaction of the GNPTs with the polymeric matrix. The optical parameters of the direct and indirect energy gap, as well as Urbach energy, were evaluated using UV/vis absorption spectra in the wavelength range of 200–800 nm. The increase in the concentration of GNPTs resulted in a reduction of the optical band gaps, which reached 1.99 eV for allowed indirect transition. The electric conductivity called AC is the electric conductivity originating potential dependent on frequency. Electrical conductivity is the reciprocal of electrical resistivity, and resistivity can be calculated from resistivity = resistance *Area/Length of a specimen. The composites' ac conductivity varies with frequency according to Jonscher's universal power equation, and it is observed to increase with increasing nanofiller concentrations. At room temperature, the sample containing 1 wt% GNPTs has good optical characteristics, high conductivity, and dielectric constant. The dielectric constants (ε′ and ε′′) increased as the nanofiller concentration increased and reduced as the frequency increased. Important enhancement in optical, dielectric, and ac electrical properties in these composite films makes them a potential candidate for application in electronic devices.
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03 October 2022
A Correction to this paper has been published: https://doi.org/10.1007/s10854-022-09228-z
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Alharbi, E.M., Rajeh, A. Tailoring the structural, optical, dielectric, and electrical properties of PEO/PVA blend using graphene nanoplates for energy storage devices. J Mater Sci: Mater Electron 33, 22196–22207 (2022). https://doi.org/10.1007/s10854-022-08999-9
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DOI: https://doi.org/10.1007/s10854-022-08999-9