Exploring the Properties of PVA/PANI Films With ZnO Nanoparticles: A Comprehensive Investigation of Structural, Electrical, and Thermal Characteristics

Document Type

Article

Publication Title

Engineering Reports

Abstract

Polyvinyl alcohol (PVA) and polyaniline (PANI) were mixed with zinc oxide (ZnO) nanoparticles, synthesized using the sol–gel method. A variety of PVA/PANI/ZnO nanocomposites were made using the solution casting approach with various ZnO concentrations (0.5, 1, 1.5, and 2 wt%). This study examines the effect of ZnO loading on the structural, thermal, and electrical properties of the nanocomposites. An X-ray diffraction (XRD) study revealed the presence of ZnO nanoparticles with an average crystallite size of 12 nm. Fourier transform infrared (FTIR) spectroscopy confirmed the interaction of the PVA/PANI matrix and ZnO nanoparticles by demonstrating the presence of PANI's amine group in the spectrum. Differential scanning calorimetry (DSC) study revealed an increase in both the glass transition temperature (Tg) and melting point (Tm) from 224°C to 250°C when ZnO content increased, showing ZnO's plasticizing action. Dielectric research revealed that frequency and ZnO concentration influenced the dielectric constant and dielectric loss. The highest dielectric constant reached 96, while the dielectric loss maintained about 0.03 in the 5–7 kHz frequency range. Furthermore, AC conductivity improved with higher ZnO loading and frequency, while smaller nanofiller concentrations showed minimal dielectric values at higher frequencies.

DOI

10.1002/eng2.70076

Publication Date

5-1-2025

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