Method for preparing continuous carbon fiber-reinforced thermoplastic resin composite material

Abstract

The invention discloses a method for preparing a continuous carbon fiber-reinforced thermoplastic resin composite material, which comprises the following steps: mixing N,N-dimethylacetamide and acetone at the mass ratio of (1-5):1 to obtain mixed solvent; dissolving 1-5 parts by weight of polyether sulfone into 30-60 parts by weight of mixed solvent to be fully dissolved so as to obtain polyethersulfone solution; adding 0.5-2.5 parts by weight of indissolvable thermoplasticity powdered resin into the polyether sulfone solution by mechanical stirring or ultrasonic vibration to obtain suspension with stable performance, wherein the added thermoplasticity resin powder is evenly distributed; dipping the continuous carbon fiber into mixed thermoplasticity resin suspension at the temperature of 18-22DEG C to obtain prepreg; and carrying out hot pressing and shaping to the prepreg to obtain a product. The method for preparing the continuous carbon fiber-reinforced thermoplastic resin composite material has the advantages of low cost, simple technology and small solvent toxicity.

Description

technical field [0001] The invention belongs to a method for preparing a resin composite material, in particular to a method for preparing a continuous carbon fiber reinforced thermoplastic resin composite material. Background technique [0002] In recent years, continuous carbon fiber reinforced high-performance thermoplastic resin composites have been widely used in high-end aerospace industry and conventional civil manufacturing. In the process of preparing thermoplastic composite prepregs, since most thermoplastic resins are difficult to dissolve in common organic solvents at room temperature, it is inevitable to use complex powder impregnation methods and melt impregnation methods. In view of the above problems, the present invention provides a method for preparing a prepreg using a conventional liquid-phase impregnation method combined with a suspension. [0003] In the research of liquid phase impregnation process, CN1603363A reported that the prepreg of continuous f...

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Problems solved by technology

[0003] In the research of liquid phase impregnation process, CN1603363A reported that the prepreg of continuous fiber reinforced thermoplastic resin composite material was prepared by solution impregnation method, which solved the problem of fiber entanglement and pultrusion between polyarylether series resin and continuous fiber in the impregnation process , but the mixed solvent used has a high melting point and high toxicity, and it is difficult to completely remove it, which brings certain difficulties to the actual operation

The mixed solvent used in the CN1257226C patent has limited solubility to the thermoplastic resin, and the dissolution of the resin and the preparation of the prepreg need to be carried out at a relatively high temperature. The volatilization of the organic solvent will bring additional costs to the actual operation and industrial application, making the original price Higher carbon fiber reinforced thermoplastic resin composites are more limited in application

This preparation process is more complex and costly

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