Carbon nano-tube connecting carbon fiber multi-scale reinforcing body and method for producing the same

Abstract

A carbon nanotube-connected carbon fiber multi-scale reinforcement and a preparation method thereof relate to a carbon fiber reinforcement and a preparation method thereof. It solves the defects that the carbon fiber treated by the existing carbon fiber treatment method increases the interface rigidity, reduces the material toughness and cannot improve the performance of the resin matrix between the fibers and between the carbon fiber laminates. The carbon nanotube-connected carbon fiber multi-scale reinforcement is made by combining carbon nanotubes modified by 1,6 hexamethylenediamine and carbon fibers with acid chloride functional groups on the surface. Preparation method: prepare carbon nanotubes modified by 1,6 hexamethylenediamine and carbon fibers with acid chloride functional groups on the surface; then put carbon nanotubes modified by 1,6 hexamethylenediamine and carbon fibers with acid chloride functional groups on the surface into N, N - Reaction in dimethylformamide to obtain carbon nanotube-connected carbon fiber multi-scale reinforcement. The carbon nanotube-connected carbon fiber multi-scale reinforcement of the present invention has large surface activity, many chemically active functional groups, strong reactivity, good adhesion with the matrix, the composite material interface shear strength is increased by 127.5% to 144.7%, and the matrix toughness can be improved. 34.43% to 48.67%.

Description

technical field [0001] The invention relates to a carbon fiber reinforced body and a preparation method thereof. Background technique [0002] Carbon fiber has a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, creep resistance and small thermal expansion coefficient, making it one of the most important reinforcement materials in recent years and widely used in many fields. Among them, carbon fiber / epoxy resin composite material is the main form of its application. Carbon fiber / epoxy resin composite material has a series of excellent properties such as high strength, high modulus, low density, and stable size. It has been widely used in aerospace and military industries. and sports equipment. However, due to the high inertia of the carbon fiber surface, low surface energy, few chemically active functional groups, low reactivity, and poor adhesion to the matrix, there are many defects in the interface of the composite ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects that the existing carbon fiber processing method increases the interface rigidity, reduces the material toughness and cannot improve the performance of the resin matrix between the fibers and between the carbon fiber laminates, and provides a carbon nanotube connection Carbon fiber multi-scale reinforcement and its preparation method

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