Carbon fiber reinforced ABS (Acrylonitrile Butadiene Styrene) resin composite material with superior heat conductivity and preparation method

Abstract

The invention discloses a carbon fiber reinforced ABS (Acrylonitrile Butadiene Styrene) resin composite material with superior heat conductivity and a preparation method. The composite material consists of the following materials in parts by weight: 90 parts of ABS resin, 10 parts of maleic anhydride grafted ABS, 10-80 parts of carbon fibers, 10-20 parts of an 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: mixing the raw materials in a certain mixture ratio; mixing the raw materials except the carbon fibers at a high speed; and adding an obtained mixture into a hopper of a double-screw extruder, adding the carbon fibers through the fiber inlet of the extruder, extruding the mixture, and granulating the extruded mixture. 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 / electric products; and moreover, the raw material cost is low, a preparation process is simple, and the method is suitable for industrial continuous production.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber composite materials, and in particular relates to a carbon fiber reinforced thermoplastic ABS resin composite material with excellent thermal conductivity and a preparation method thereof. Background technique [0002] ABS resin refers to acrylonitrile-butadiene-styrene copolymer, which is non-toxic, tasteless, low water absorption, mechanical properties, thermal properties, wear resistance, chemical resistance and dyeability, good molding and mechanical processing Good performance, widely used in refrigerator lining, TV casing, vacuum cleaner, air conditioner, telephone, instrument, computer, copier and other electronic and electrical industries. With social development and industrial progress, electronic components and electronic equipment are becoming more and more thin-walled, lightweight, and miniaturized. Therefore, the requirements for the rigidity and thermal conductivity of materials...

AI Technical Summary

Problems solved by technology

However, metal thermally conductive fillers have the disadvantages of high density, corrosion, and the decline in the mechanical properties of ABS materials; inorganic non-metallic fillers are not very effective in improving the thermal conductivity of ABS resins, and often reduce the mechanical properties of ABS resins.

Although the method of using carbon materials such as graphene, carbon nanotubes and nano-carbon fibers can significantly improve the thermal conductivity of ABS resin, these materials are expensive and cannot be industrialized, and the technologies involved are only in laboratory research. stage

Document 1 prepared the thermally conductive ABS / pitch carbon fiber composite material by impregnating the acetone solution of ABS resin into the self-made pitch-based carbon fiber, vacuuming the solvent, and then hot-pressing. Organic solvents will cause harm such as the decline of mechanical properties, and it is completely unfeasible in industry; in addition, there are still problems such as not suitable for the preparation of products with complex structures, materials with only one-dimensional and two-dimensional thermal conductivity, and mechanical properties that have not been improved.