Method for enhancing properties of carbon fiber-high polymer composite material and product thereof

Abstract

The invention discloses a method for enhancing properties of a carbon fiber-high polymer composite material and a product thereof. Under the condition of not influencing the properties of the carbon fiber, a plasma reinforced chemical vapor deposition process is adopted to grow and deposit a graphene wall (carbon fiber-graphene wall composite material) on the carbon fiber surface in a low-temperature environment; and the advantages of high mechanical strength and large specific area of the graphene wall are utilized to effectively improve the interface binding force between the carbon fiber and high polymer and greatly enhance the mechanical strength of the carbon fiber-high polymer composite material.

Description

technical field [0001] The invention relates to a method for using a graphene wall to enhance the mechanical properties of a carbon fiber-polymer composite material, and at the same time relates to the carbon fiber-polymer composite material obtained by the method. Background technique [0002] Carbon fiber is a new type of fiber material with high strength and high modulus fiber containing more than 95% carbon. It has many excellent properties: carbon fiber has high axial strength and modulus, low density, high specific performance, no creep, ultra-high temperature resistance in non-oxidizing environment, and good fatigue resistance. It is an important material in both national defense and civilian use. [0003] However, even if high-strength fibers are combined with suitable polymer materials, high-strength composites may not necessarily be obtained, because the interface properties between the fibers and the matrix play a key role in the final performance of the composit...

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Problems solved by technology

[0005] Depositing whiskers (such as silicon carbide, silicon nitride, etc.) on the fiber surface generally adopts high-temperature chemical vapor deposition (CVD), but due to the high temperature of whisker growth, the in-plane structure and performance of the fiber are severely damaged and deteriorated. Final carbon fiber-polymer composite properties

Recently, researchers used CVD to deposit carbon nanotubes on the surface of carbon fibers. Because the growth temperature was too high and the catalyst would react with the fibers, the interfacial shear strength of the composite material was only increased by about 15%.

However, if the deposition and growth temperature of carbon nanotubes is lowered, the enrichment density of carbon nanotubes on the surface of carbon fibers is very low and the distribution is uneven, so the degree of enhancement of the mechanical properties of composite materials is very limited.

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