▎ 摘　　要

NOVELTY - Preparing graphene-reinforced resin-based all-carbon composite material comprises (i) soaking carbon nanotube film in hydrogen peroxide aqueous solution at 50-70 degrees C for 60-72 hours, soaking in aqueous hydrochloric acid solution for 10-12 hours, and washing using deionized water to obtain purified carbon nanotube film, (ii) mechanically uniaxially stretching the purified carbon nanotube film to adjust arrangement direction of carbon nanotubes on the purified carbon nanotube film to be uniform to obtain stretched carbon nanotube film, (iii) soaking the stretched carbon nanotube film in the first liquid for 10-15 minutes to introduce epoxy groups on the surface of the stretched carbon nanotube film, washing the stretched carbon nanotube film with dichloromethane, allowing to stand in a vacuum at 60-80 degrees C to obtain the treated film, where the first liquid is a mixture of meta-chloroperoxybenzoic acid (m-CPBA) and dichloromethane, and m-CPBA in the first liquid is a saturated concentration. USE - The method is useful for preparing graphene-reinforced resin-based all-carbon composite material. ADVANTAGE - The method: slowly solidifies; utilizes the close combination of the soft phase and the hard phase to make the composite material compact; and achieves high thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene-reinforced resin-based all-carbon composite material obtained by the above preparation method.