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The influence of graphene oxide on the optical, thermal, electrical, and dielectric properties of PVA/PEO composite

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Abstract

The incorporation of nanoscale organic or inorganic components into polymer blend is a key strategy for optimizing the efficiency of material features such as structural, physical, chemical, optical, electrical, and thermal characteristics. Polymer nanocomposites are a new type of material created with nanostructure additives such as metals, metal oxides, and so on. Transition metal oxides such as graphene oxide have been extensively studied for applications including electrical, optical, and mechanical properties over the last several decades. Samples of polyvinyl alcohol and polyethylene oxide (PVA/PEO) loaded with different quantities of graphene oxide nanosheets (GO) were created using the casting technique. Various techniques were used to characterize the produced samples, including XRD, FTIR, SEM, UV/Vis, DSC, TGA, and dielectric characteristics. XRD verified the semicrystalline structure of the PVA/PEO blend, with crystallinity decreasing as the GO nanosheets percentage increased. With the decreasing frequency and varied concentrations of GO nanosheets, the FTIR absorption spectra demonstrate a shift in peak locations and intensity fluctuations. The crystalline regions have a roughly spherical shape, as shown in SEM pictures. The optical band gap (direct and indirect) is calculated using UV–Vis spectra, which decreases with increasing dopant concentration. The single glass transition temperature (Tg) is seen in the DSC analysis, indicating that PVA and PEO are miscible. The inclusion of filler changes the amorphous phase, resulting in a variation in melting temperature (Tm). The dynamic ion activity of the produced samples was determined using the frequency-dependent composite films (AC conductivity). At various concentrations and room temperatures (RT), the dielectric constant (ε′), dielectric loss (ε″), and tanδ versus frequency graphs were also obtained. The ionic conductivity of composite PVA/PEO/GO samples increased at room temperature with the addition of graphene oxide reaching a maximum of 10–9 S/c. These results are projected to have an important effect on different applications, especially energy storage, polymer solar cells, and polymer organic semiconductor.

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Data availability

The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, Al-Azhar University, Girls Branch, Cairo, 11754, Egypt

    H. M. Ragab

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  1. H. M. Ragab
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HMR: Investigation, Writing—Review and Editing, Methodology, Formal analysis, Conceptualization. There are no other authors.

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Correspondence to H. M. Ragab.

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Ragab, H.M. The influence of graphene oxide on the optical, thermal, electrical, and dielectric properties of PVA/PEO composite. J Mater Sci: Mater Electron 33, 19793–19804 (2022). https://doi.org/10.1007/s10854-022-08789-3

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  • DOI: https://doi.org/10.1007/s10854-022-08789-3

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