High-thermal-conductivity thermoplastic material containing graphene nanoplatelets and preparation method of high-thermal-conductivity thermoplastic material

The invention discloses a high-thermal-conductivity thermoplastic material containing graphene nanoplatelets and a preparation method of the high-thermal-conductivity thermoplastic material. A formula of the high-thermal-conductivity thermoplastic material comprises thermoplastic resin, tackifying resin, metal filler, ceramic filler, a flame retardant and elastic filler. The preparation method comprises the steps: step 1, weighing raw materials; step 2, carrying out high-temperature drying; step 3, preparing a mixture; step 4, preparing thermoplastic material particles; and step 5, screening and storing. In the step 1, the tackifying resin is one or a mixture of more of rosin, rosin derivatives and terpene resin, the metal filler is beryllium oxide, and the ceramic filler is silicon nitride. Compared with an existing high-thermal-conductivity thermoplastic material, the high-thermal-conductivity thermoplastic material has the advantages that the metal filler and the ceramic filler are added to form a thermal