Influence of amine-functionalised graphene oxide filler on mechanical and insulating property of epoxy nanocomposites

Abstract

Graphene oxide incorporated epoxy nanocomposites were prepared using synthesised graphene oxide (GO) and amine functionalised graphene oxide (AGO) in various loading (0-0.6) wt% by solution blending method. As synthesised GO and AGO were characterised by Fourier transform infrared spectrum (FTIR), x-ray diffraction (XRD) and Thermogravimetric (TG) analysis. The dielectric permittivity and loss factor of GO/AGO epoxy nanocomposites were found out by impedance analyser in the frequency range of 101 to 106 Hz. The dielectric endurance of GO/AGO epoxy nanocomposites was investigated by dielectric breakdown strength and electrical resistivity. It was found that for filler loadings up to 0.4 wt% of both GO and AGO, there was a proportionate change in properties due to homogeneous dispersion. The study shows surface functionalised AGO-epoxy nanocomposites have shown better permittivity, loss factor, and breakdown strength than neat epoxy and GO-epoxy composites.