Electrical characteristics of different concentration of silica nanoparticles embedded in epoxy resin

0579568 - ÚPT 2024 RIV US eng J - Journal Article
Al Soud, A. - Daradkeh, Samer I. - Knápek, Alexandr - Holcman, V. - Sobola, D.
Electrical characteristics of different concentration of silica nanoparticles embedded in epoxy resin.
Physica Scripta. Roč. 98, č. 12 (2023), č. článku 125520. ISSN 0031-8949. E-ISSN 1402-4896
Institutional support: RVO:68081731
Keywords : epoxy resin * dielectric spectroscopy * epoxy nanocomposite * polymer
OECD category: Nano-materials (production and properties)
Impact factor: 2.9, year: 2022
Method of publishing: Open access
https://iopscience.iop.org/article/10.1088/1402-4896/ad070c

In this study, modified epoxy nanocomposite was produced by incorporating SiO2 nanoparticles of 15-30 nm in size, with different concentrations ranging from 1 to 20 wt%. The electrical properties of the epoxy nanocomposite were measured at room temperature in the frequency range of 10-2-107 Hz. To determine the impact of nanoparticles on the epoxy composition, scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDS), Fourier transform infrared spectra (FTIR) spectroscopy, and Raman spectroscopy were conducted. With an increase in filler (SiO2 nanoparticles) content, the electrical characteristics of the epoxy nanocomposite exhibited multiple changes. At low concentrations, all electrical properties experienced a notable increase. The epoxy with 15 wt% of SiO2 nanoparticles samples had a lower permittivity, loss number, conductivity, and capacitance than the unfilled epoxy. At medium concentrations (5 to 15 wt%), the formation of immobilized nanolayers has an impact on permittivity, loss number, conductivity, and capacitance, which have decreased, impedance and modulus increased. The initiation of contact between the nanofillers at a concentration of 20 wt% leads to the formation of continuous interfacial conductive pathways, resulting in a dramatic increase in the permittivity, conductivity, and capacitance of the composites, while concurrently reducing impedance.
Permanent Link: https://hdl.handle.net/11104/0348383