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Updated: Jul 4, 2026
Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
Cellulose-PVA-based polymer nanocomposites reinforced with Ba(Ti0.5Fe0.5)O2.25 nanoparticles: structural and
Amel Mohamed Abouelnaga1, Thoraya Maamoun Elhelali1, Amany M El Nahrawy2
1Physics Department, Science College, Jazan University 45142 Jazan Kingdom of Saudi Arabia.
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Cellulose/polyvinyl alcohol (CNs/PVA)-based nanocomposites reinforced with Ba(Ti0.5Fe0.5)O2.25 (FeBTO) nanoparticles were successfully fabricated via a solution-casting in situ polymerization approach to develop sustainable dielectric materials for flexible electronics and energy-storage applications. The novelty of this work lies in correlating FeBTO loading with structural ordering, interfacial polarization, and thermally activated charge transport within a biodegradable polymer matrix. Structural and morphological properties were investigated using XRD, FTIR, SEM, TEM, and impedance spectroscopy. XRD results revealed that low FeBTO loading enhanced polymer ordering, whereas higher concentrations reduced CNs/PVA crystallinity because of interfacial strain effects. TEM/SEM analyses confirmed nanosized FeBTO crystallites (∼15 nm) aggregated into hierarchical structures within the polymer matrix. FTIR spectra verified strong hydrogen-bond interactions between FeBTO nanoparticles and the CNs/PVA network. Electrical measurements demonstrated a substantial reduction in bulk resistance and enhanced conductivity with increasing FeBTO content owing to improved interfacial polarization and hopping conduction mechanisms. The obtained results highlight the potential of FeBTO@CNs/PVA nanocomposites as environmentally friendly multifunctional materials for next-generation flexible dielectric devices and sustainable electronic technologies.
