Surface modification method of carbon fiber by plasma treatment and coating of nano graphene

Abstract

The invention relates to a surface modification method of carbon fiber by plasma treatment and coating of nano graphene, which is characterized in that nano graphene and a carbon fiber material are used as raw materials, and a nano graphene coating is coated on the surface of the carbon fiber material by a plasma treatment and coating method. The method comprises the steps of: (1) preparing 0.5-10% organic solvent or water sol solution of nano graphene by utilizing an ultrasonic oscillating technology; (2) coating the graphene solution on the surface of carbon fiber and drying; and (3) placing the carbon fiber on a plasma device, and spraying the plasma to the surface of the carbon fiber for surface modification, wherein the treatment power is 100-1000W and the time is 10-900s. By adopting the method, a high-performance composite material can be formed, and the mechanical property, conductivity and heat resistance of the carbon fiber are further improved. The method is low in cost, simple in operation, strong in applicability, good in treatment effect and not likely to cause environmental pollution, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber surface modification, in particular to a method for surface modification of carbon fiber plasma treatment coated nano-graphene. Background technique [0002] Carbon fiber refers to a fiber material that has been carbonized at a high temperature and contains more than 85% carbon, including carbon fiber and graphite fiber. Carbon fiber is a fiber with a carbon content of 85% to 95% after the organic fiber is treated at 1000-2300°C; graphite fiber is a fiber with a carbon content of more than 98% after the organic fiber is treated at 2300°C. A high-performance fiber, because of its high specific strength, high specific modulus, small thermal expansion coefficient, low friction coefficient, and good low temperature resistance, it has become the most important reinforcing material for resin-based composite materials in recent years, and is widely used in aerospace. Components and sporting goods. ...

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Problems solved by technology

[0005] Graphene is a material with the best strength of known materials, excellent electrical conductivity and thermal conductivity, and the single-layer graphene after chemical functionalization has good solubility in water and organic solvents, which is conducive to its uniform dispersion And molding processing, the current existing patents on plasma treatment of carbon fiber surface modification technology do not involve the method of surface modification of carbon fiber coated with nano-graphene sol and then plasma technology