▎ 摘　　要

NOVELTY - Graphene/ceramic composite particles are prepared by taking ceramic particles as core particles, and sequentially coating an aqueous polyurethane resin layer, a graphene powder layer and an alcohol-soluble resin layer to form particles having a spherical structure. The thickness of the aqueous polyurethane resin layer is 5-15 mu m. The thickness of the graphene powder layer is 0.15-0.75 mu m. The thickness of the alcohol-soluble resin layer is 5-20 mu m. USE - The graphene/ceramic composite particles are useful for injection molding to control the dispersion range and dispersion effect of graphene in the matrix. ADVANTAGE - The graphene/ceramic composite particles have the same size and excellent fluidity, and can be prepared by a simple method with low cost and high efficiency and without any pollution. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the graphene/ceramic composite particles, which involves: (1) sieving the ceramic powder to obtain ceramic fine particles having a particle size of 200-1250 mesh; (2) adopting a boiling spray coating and drying method to uniformly coat the aqueous polyurethane resin solution on the ceramic particles to obtain aqueous polyurethane resin/ceramic composite particles; (3) performing low-temperature plasma surface treatment on the aqueous polyurethane resin/ceramic composite particles to obtain aqueous polyurethane resin/ceramic composite particles; (4) ball milling graphene powder and aqueous polyurethane resin/ceramic composite particles according to a ball mass ratio of 5:(1-2) at 250-300 rpm for 1-3 hours to obtain graphene powder/aqueous polyurethane resin/ceramic composite particles; and (5) using the boiling spray coating and drying method to uniformly coat the alcohol-soluble resin coating liquid on the graphene powder/aqueous polyurethane resin/ceramic composite particles obtained in step (4).