High-fluidity polypropylene-based heat-conducting composite material as well as preparation method and application thereof

The invention relates to the technical field of heat-conducting plastics, and discloses a high-flow polypropylene-based heat-conducting composite material as well as a preparation method and application thereof. The composite material is prepared from a raw material composition containing polypropylene, modified aluminum powder and optional additives, the zero-shear viscosity value of the polypropylene at 200 DEG C is smaller than or equal to 300 Pa.s, and the melt flow rate of the polypropylene at 230 DEG C under the load of 2.16 kg is larger than or equal to 90 g/10 min; when the modified aluminum powder is prepared from aluminum powder with the particle size of 0.5-1.5 microns or aluminum powder with the particle size of 0.5-1.5 microns and aluminum powder with the particle size of 8-12 microns, the polypropylene accounts for 20-60 parts by weight, and the modified aluminum powder accounts for 40-80 parts by weight; when the modified aluminum powder is prepared from aluminum powder with the particle size o