▎ 摘　　要

A novel mesoporous SiO2-graphene nanohybrid was successfully synthesized by a 1-pot hydrothermal synthesis method using tetraethylortho silicate and graphene oxide as initial materials to improve the dispersion of graphene in epoxy matrix. Subsequently, the SiO2-graphene nanohybrids were added into epoxy resin to investigate their fire behaviors. It was found that the incorporation of the as-prepared SiO2-graphene nanohybrids into epoxy resin obviously increased the flame retardancy, compared with those of neat epoxy. This attractive feature of SiO2-graphene epoxy nanocomposites was attributed to the barrier effect as well as the labyrinth effect contributed by SiO2-graphene in EP resin.