The effects of temperature and frequency on dielectric properties of modified epoxy-graphene and carbon fabric nanocomposites

The failure instances of composite materials across diverse industrial applications have underscored the imperative for enhancing the electrical properties of polymers to align with the rigorous demands of the industry. In this study, Epoxy-Graphene Nanoplatelet (GNP) and Epoxy-GNP-carbon fabric composites were fabricated via a hand-layup technique coupled with bagging, succeeded by compression molding. The performance evaluation of composites incorporating graphene platelets ranging from 0.5 to 5 wt% in the epoxy matrix yielded unsatisfactory results. Consequently, an 8-ply carbon fabric integrated with 1 wt% graphene in the epoxy matrix was employed to enhance the composite's performance. The impact of graphene nanoplatelets and carbon fabric has been explored concerning microstructural characteristics, as well as electrical properties, specifically AC conductivity, dissipation factor, and dielectric constant.