▎ 摘　　要

NOVELTY - Polypropylene composite material comprises 100 pts. wt. polypropylene, 1-10 pts. wt. modified graphene comprising amino and/or azide groups and 1-20 pts. wt. rare earth composite, where the content of the amino group and/or azide group is 0.1-5%, and the coordination number of the rare earth composite is 3-8. USE - Polypropylene composite material. ADVANTAGE - The composite material has excellent thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the composite material, involving (a) dispersing rare earth oxides and 4-p-aminobenzoic acid in water at a stirring speed of 1000-3000 rpm, and heating at 40-60 degrees C to fully carry out the coordination reaction, (b) centrifuging the above solution, drying at 90-120 degrees C for 14-30 hours, adding siloxane coupling agent, and stirring at 500-800 rpm for 10-20 minutes to obtain the rare earth composite, and (c) amidating 4-p-aminobenzoic acid and/or azide graphene to obtain modified graphene, adding the rare earth composite and modified graphene to the polypropylene resin, evenly mixing using a high-speed mixer, passing the uniformly mixed materials through an extruder for granulation, where the feeding section is 180-210 degrees C, and the plasticizing extrusion section is 180-210 degrees C, and the melt conveying section has an extrusion temperature of 200-230 degrees C, and the head temperature is 200-220 degrees C, and the vacuum degree is 0.3-0.8 MPa.