Preparation and dielectric behavior of epoxy resin containing graphene oxide

Graphene oxide (GO) and chemically modified graphene oxide have been dispersed in low amount (until 0.5 wt%) into epoxy resin. Comparing the dielectric responses of the polymer nanocomposites with those of neat epoxy, no significantly changes were noted. Relevant differences were recorded after a post-curing heating treatment able to reduce the dispersed GO to more conductive graphene. Neat epoxy and epoxy samples with chemically modified GO had usually a small decrease on permittivity while GO samples showed an increase of about 10% of the value previously observed. This behavior will be connected with chemical properties of the nanofiller.