Method for preparing epoxy resin corrosion-resistant coating by doping functionalized graphene

Abstract

The invention discloses a method for preparing epoxy resin corrosion-resistant coating by doping functionalized graphene. The method is characterized by comprising the following steps: dispersing graphene oxide into distilled water to obtain suspension liquid, performing ultrasonic dispersion, adding 1-naphthalene sulfonic acid sodium salt to perform ultrasonic dispersion, adding hydrazine hydrateto perform reducing reaction, centrifuging, washing the precipitate with water until the pH is 7, drying and grinding to obtain functionalized graphene; adding a surfactant and absolute ethanol intoa hydroxylated polywalled carbon nanotube, and performing mechanical stirring and ultrasonic dispersion to obtain the dispersed hydroxylated polywalled carbon nanotube; adding concentrated nitric acidinto uncut carbon fiber, performing constant-temperature water bath treatment, taking out and cleaning until the pH is 7, drying until constant weight and cutting for future use; and adding the obtained functionalized grapheme into the suspension liquid, adding the dispersed hydroxylated polywalled carbon nanotube and liquid phase carbon oxide fiber, completely stirring, adding a curing agent, mixing and standing to obtain the epoxy resin corrosion-resistant coating.

Description

technical field [0001] The invention relates to the field of resin coatings, in particular to a method for preparing epoxy resin anticorrosion coatings by doping functionalized graphene. Background technique [0002] As a matrix material, epoxy resin has the advantages of good biodegradability, low density, long service life, excellent electrochemical and mechanical properties, etc., and plays an important role in composite materials. They are widely used in aerospace, military and other fields. However, the limiting oxygen index of epoxy resin is very low, and it is extremely flammable. After a fire, it continues to burn and emits a large amount of smoke. In recent years, in order to improve the flame-retardant properties of composite materials and reduce fire hazards, flame-retardant epoxy resins have attracted more and more attention, especially in aviation, aerospace, military and other fields, which urgently need non-toxic and environmentally friendly flame-retardant...

AI Technical Summary

Problems solved by technology

[0003] Epoxy resin has the advantages of good bonding performance and easy processing and molding. It is widely used in electronic appliances, aerospace and other technologies, but it is a combustible material. Once it is ignited, it will cause the mechanical properties of the composite material to decrease rapidly. The flame retardant modification of epoxy resin has always been a technical problem in this field