Nonlinear Conduction Characteristics of Graphene Oxide Filled Epoxy Resin

Graphene oxide/epoxy resin nanocomposites are studied from the aspect of nonlinear conduction characteristic, which is measured by a dc conduction setup. The experimental results show that, compared with pure epoxy, nanocomposite presents a distinct nonlinear conduction characteristic only when the filler loading is high enough. The nonlinear exponent increases with the increasing filler loading. The nonlinear conduction characteristics of the prepared nanocomposites are greatly affected by the temperature. Particularly, the conductivity of the 1 wt% decreases obviously with the increase in temperature. This work is very helpful for the application of graphene oxide filled epoxy resin to regulating the non-uniform electric field.