A method for preparing carbon fiber composite automotive parts

Abstract

The invention discloses a preparation method for carbon fiber composite automobile parts. The preparation method comprises the following steps of (1) preparing carbon fibers from polyacrylonitrile precursors, processing the carbon fibers by an anodic oxidation method, preparing the carbon fibers into carbon fiber bundles, and then preparing a carbon fiber textile; (2) performing surface modification on the prepared carbon fiber textile by a modified sizing agent made from mono-wall CNTs, PPEK, a modified system and a sizing agent; (3) preparing a Steel / CFRP multicoat through overlapping a modified carbon fiber reinforcement composite and a steel plate; (4) forming the prepared Steel / CFRP multicoat by an RTM mold through a vacuum resin transfer molding forming technology; and (5) demouding the formed Steel / CFRP multicoat to obtain the carbon fiber composite automobile part products. The preparation method disclosed by the invention is low in preparation cost, superior in performance, economic and environmental-friendly, good in stability, easy and simple to operate, and low in preparation difficulty, can meet requirements of batch automatic production, provides reliable technical support of the of carbon fiber components for scaled application in the field of automobile production, and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of auto parts manufacturing, in particular to a method for preparing auto parts made of carbon fiber composite materials. Background technique [0002] Carbon fiber is the general term for fibers with a carbon content higher than 90%. It was developed in the 1960s. It is a high-tech new material and a fibrous carbon material; carbon fiber has high specific strength, high specific thermal modulus, and A series of excellent properties such as high temperature, corrosion resistance, creep resistance, high vibration attenuation, electrical conductivity, heat transfer and small thermal expansion coefficient, etc., have mechanical properties unmatched by other common fibers, especially in high temperature inert environments above 2000 °C, It is the only material that can keep the strength without falling; carbon fiber reinforced composite material, namely CFRP, is a composite material formed with carbon fiber or c...

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Problems solved by technology

[0003] One of the most obvious effects of applying carbon fiber reinforced composite materials to the automotive field is to reduce the weight of the car, and reduce the fuel consumption per 100 kilometers of the car through weight reduction, thereby achieving the purpose of energy saving, emission reduction, and environmental protection. For China, which has a large vehicle base, It will significantly improve the bad air conditions in our country; the application of carbon fiber reinforced composite materials in the automotive field has other meanings. In addition to reducing fuel consumption and reducing environmental pollution, it also helps to improve the acceleration and control stability of the car, and is of great importance to the car. The reduction of noise, vibration, inertia and braking distance in the event of a collision has a positive effect; engine components and drive shafts made of carbon fiber composite materials have high damping properties and reduce vibration, reduce noise and improve ride comfort; carbon fiber composite materials Because of its good impact resistance, it is widely used in automobile bumpers; it greatly improves the safety. However, due to its high raw material cost, carbon fiber composite materials have restricted their application in the automotive industry for a long time. In order to reduce At present, carbon fiber manufacturers have set their sights on the research and development of large tow carbon fibers, and the manufacturing technology of carbon fiber products has limitations, lack of mass connection technology, long production cycle, and difficult to achieve large-scale production. At present, China's carbon fiber composite The proportion of annual consumption of materials in the automobile industry is still very small. Therefore, the application research of carbon fiber composite materials in automobiles has great development and application prospects.

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