Effect of Low-Functionalized Graphene Oxide on the Rheological and Electrical Properties of Water-Based Epoxy Coatings

In the present work, rheological and electrical properties of epoxy-based nanocomposite coatings containing low-functionalized graphene nanosheets are studied. The low-functionalized, highly concentrated graphene nano-sheets in water were synthesized using a non-dispersion mechanism, which made them to be stable in water. The rheological investigations show a transition from a viscous response to a solid-like response at low frequency region, which indicates formation of nanofillers network structure in these samples at low filler contents. In addition, electrical conductivity as high as 1.34×10⁻¹ S/m is achieved for the epoxy based nanocomposite coatings, which indicates a good electrical network formation through the epoxy matrix.