Benzoxazine/epoxy resin/oxidized graphene composite material and preparation method thereof

The invention provides a benzoxazine/epoxy resin/oxidized graphene composite material and a preparation method thereof. The ternary composite material has reduced solidification temperature and increased toughness. The preparation method comprises the following steps: a step 1: dissolving the oxidized graphene into a solvent for preparing a solution of oxidized graphene; a step 2: dissolving the benzoxazine and the epoxy resin into a solvent for preparing a solution of benzoxazine-epoxy resin; a step 3: adding the solution of benzoxazine-epoxy resin into the solution of oxidized graphene, uniformly dispersing the solution with stirring, and preparing a benzoxazine/epoxy resin/oxidized graphene mixture; a step 4: drying the benzoxazine/epoxy resin/oxidized graphene mixture to obtain a benzoxazine/epoxy resin/oxidized graphene composite material intermediate; a step 5: solidifying the benzoxazine/epoxy resin/oxidized graphene composite material intermediate, in order to obtain the benzoxazine/epoxy resin/oxidized graphene composite material.