▎ 摘　　要

NOVELTY - Prepreg comprises 100 pts. wt. epoxy resin, 0.25-2 pts. wt. graphene, 0.25-2 pts. wt. aramid fiber and 67-400 pts. wt. carbon fiber. USE - Prepreg. ADVANTAGE - The prepreg can improve the shortcomings of interlayer resin layer of the carbon fiber reinforced resin-based composite material formed after the prepreg is laminated and cured, which is brittle and prone to delamination fracture damage, and strengthens the structure of CFRP Stability and impact resistance, improve the material's tensile strength, compressive strength and interlayer shear strength and other mechanical properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the prepreg, which involves putting the aramid fiber and graphene in a blast drying box to fully dry to remove the internally adsorbed moisture, mixing the graphene with acetone, and ultrasonically stirring for 60 hours until the graphene fully dispersed, transferring the mixture to a stirrer, adding 1/10 times amount of the epoxy resin A component in multiple times while continuing to stir, until the resin completely dissolved and graphene uniformly dispersed, dividing epoxy resin into 2 portions, component A as resin portion, component B as the curing agent portion, and only component A used here, adding the mixture of epoxy resin component A, acetone, and graphene to the aramid fiber, and stirring to make the mixture fully moist, wetting and wrapping the aramid fiber, putting the mixture in a blast drying box, heating it at 90 degrees C, and stirring until the acetone completely volatilized, adding another 9/10 times amount of epoxy resin A component into mixture in multiple times, while continuing to stir for more than 12 hours, until the aramid fiber and graphene uniformly dispersed in the epoxy resin A component, adding the epoxy resin B component, and using a three-roll mill to mix and homogenize, aramid fiber/graphene composite epoxy resin film made by film coating, hot pressing and cooling on the coating machine, using a prepreg machine, combining the prefabricated composite resin film with carbon fibers, and preparing the prepreg through a film coating and crimping process.