Preparation process of high-performance fiber three-phase composite material

Abstract

The invention discloses a preparation process of a high-performance fiber three-phase composite material, which comprises the following steps: adding carbon fibers into concentrated nitric acid at 80DEG C, carrying out 400W ultrasonic oxidation for 5 hours, filtering, and washing with water to neutrality to obtain oxidized carbon fibers; dispersing the oxidized carbon fibers into an ethoxylated polyethyleneimine solution, heating to 80 DEG C, stirring to react for 5 hours, filtering, and washing with water to obtain polyethyleneimine branched carbon fibers; immersing the polyethyleneimine branched carbon fibers into the glue solution, taking out the polyethyleneimine branched carbon fibers, and then curing the polyethyleneimine branched carbon fibers at 60 DEG C for 1 minute to obtain impregnated fiber; and immediately coating the surface of the impregnated fibers with an ethylene propylene diene monomer layer with the thickness of 20 microns, and curing at 80 DEG C for 5 hours to obtain the three-phase composite material. The preparation process overcomes the defects in the prior art and enhances the interface bonding strength and mechanical properties of the carbon fiber composite material.

Description

technical field [0001] The invention relates to the technical field of high-performance fiber composite materials, and specifically belongs to a preparation process of high-performance fiber three-phase composite materials. Background technique [0002] Carbon fiber is a high-strength and high-modulus fiber with a carbon content of more than 90%. In carbon fiber composite materials, the interface bonding strength between carbon fiber and composite phase is a key factor affecting the mechanical properties of carbon fiber composite materials. Only carbon fiber and composite phase To achieve better interfacial bonding, carbon fibers can effectively transmit external stress, thereby improving the mechanical properties of composite materials. However, due to the small number of surface functional groups and low interfacial bonding strength of carbon fiber, it is difficult to effectively compound with other materials, resulting in the problem of poor overall mechanical properties ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-performance fiber three-phase composite material preparation process, which overcomes the problems of low interfacial bonding strength and insufficient mechanical properties of carbon fiber composite materials in the prior art