Carbon fiber reinforced thermoplastic resin composite material with superior heat dissipation performance and preparation method

The invention relates to a carbon fiber reinforced thermoplastic resin composite material with superior heat dissipation performance and a preparation method. The composite material consists of the following materials in parts by weight: 100 parts of polycarbonate, 10-80 parts of carbon fibers, 0-40 parts of inorganic filler, 0.5-5 parts of a coupling agent, 0.2-1 part of an antioxidant and 0-3 parts of a lubricating agent. The preparation method comprises the following steps: fully drying the carbon fibers serving a raw material and the polycarbonate serving as a thermoplastic resin substrate; weighing the raw materials according to a mixture ratio; mixing the raw materials except the carbon fibers at high a speed; and adding the mixture into a hopper of a dual-screw extruder, adding the carbon fibers through the fiber inlet of the extruder, and extruding and granulating the mixture and the carbon fibers. Compared with the prior art, the composite material provided by the invention has high rigidity and high heat dissipation performance, and is suitable for the production and machining of thin-wall light electronic/electrical products. Moreover, the preparation method is simple in the preparation process, is continuous and stable in the extruding process, and is suitable for industrial continuous production.