A reduced graphene oxide-borate compound-loaded melamine sponge/silicone rubber composite with ultra-high dielectric constant.

Herein, at first, graphene oxide (GO) was prepared by a modified Hummers' method, compounded with borates and then loaded onto a melamine sponge (MS) skeleton by an impregnation-reduction method to obtain a reduced graphene oxide (rGO)-borate compound (rGB)-loaded MS. Then, MS/rGB/silicone rubber (SR) composites were prepared by a vacuum infusion process. Moreover, the microstructures, electrical conductivity, and dielectric properties of the composites were investigated.