Carbon fiber reinforced thermoplastic composite material and preparation method thereof

Abstract

The invention relates to the technical field of new energy automobile materials, and in particular relates to a carbon fiber reinforced composite material and a preparation method thereof. The carbonfiber reinforced composite material includes the following raw material components in parts by weight: 45-60 parts of thermoplastic resin, 30-50 parts of carbon fiber, 4.5-10 parts of an inorganic filler, 0.5-2 parts of a coupling agent, 0.5-1.5 parts of an antioxidant, 0.5-2 parts of a lubricant, 2-5 parts of a flame retardant and 1-3 parts of boron nitride, wherein 0.07-0.15 part of a catalyst is added to the boron nitride; the raw materials of the thermoplastic resin, the carbon fiber and the inorganic filler are fully dried by a dryer, chromium oxide and the boron nitride are mixed and reacted for standby use; the thermoplastic resin and the mixed boron nitride are mixed, and heated by a heater for 1 to 1.5 hours at the temperature of 250 DEG C-280 DEG C; the mixed thermoplastic resin,the inorganic filler, the coupling agent, the antioxidant, the lubricant, and the flame retardant are mixed at high speed in a mixer, then the mixed material is added to a hopper of a twin-screw extruder, and the carbon fiber is added through a fiber addition port of the extruder, and the carbon fiber reinforced composite material is obtained by extrusion pelletization.

Description

technical field [0001] The invention relates to the technical field of new energy automobile materials, in particular to a carbon fiber reinforced thermoplastic composite material and a preparation method thereof. Background technique [0002] In the past half century, advanced structural materials used in high-tech fields such as aerospace and new energy vehicles have been dominated by high-performance thermosetting composite materials. Due to the shortcomings of thermosetting composite materials in the application process, such as poor heat resistance, low impact resistance and damage resistance, and high manufacturing cost, their application range is limited to a certain extent, and with the development of carbon fiber composite materials, Compared with thermosetting composite materials, carbon fiber composite materials have many advantages, such as: high fracture toughness and high elongation at break; no chemical reaction in the molding process, so the molding speed is ...

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Problems solved by technology

Due to the shortcomings of thermosetting composite materials in the application process, such as poor heat resistance, low impact resistance and damage resistance, and high manufacturing cost, their application range is limited to a certain extent, and with the development of carbon fiber composite materials, Compared with thermosetting composite materials, carbon fiber composite materials have many advantages, such as: high fracture toughness and high elongation at break; no chemical reaction in the molding process, so the molding speed is fast and the molding cycle is short; prepregs can be stored indefinitely, And there are no special requirements for storage, etc., so carbon fiber thermoplastic composite materials have gradually replaced traditional thermosetting composite materials; especially with the vigorous development of new energy vehicles, carbon fiber thermoplastic composite materials are widely used in the field of new energy vehicles, but the existing carbon fiber thermoplastic composite materials The thermal conductivity of the material is poor. When using these materials to prepare products such as casings and engine covers, it is easy to damage the equipment due to poor heat dissipation performance. Moreover, many manufacturers clearly require that the flame retardant grade of carbon fiber thermoplastic composite materials must reach UL94V-0. Therefore, the current carbon fiber thermoplastic composites need to be further improved in the direction of thermal conductivity and flame retardancy.

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