Graphene airgel/polyurethane composite anticorrosion and waterproof coating and its preparation method and application

Abstract

The invention provides graphene aerogel / polyurethane composite anticorrosive waterproof paint as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing graphene aerogel by a supercritical drying method, performing gradient crystallization on the graphene aerogel so as to obtain high-strength and high-quality graphene aerogel; and uniformly dispersing the aerogel nano powder into polyurethane, thereby obtaining the graphene aerogel / polyurethane composite anticorrosive waterproof paint. According to the waterproof paint disclosed bythe invention, the aggregation problem of graphene in the polyurethane is solved, and the anticorrosive and waterproof properties of the paint are improved.

Description

technical field [0001] The invention belongs to the field of waterproof coatings, in particular to a graphene / polyurethane composite coating. Background technique [0002] Graphene has been the focus of worldwide research since it was discovered in 2004. In recent years, the research enthusiasm has been almost crazy, especially in China, because many properties of graphene are theoretically far superior to conventional materials. Its super chemical inertness, super anti-oxidation and high temperature capabilities, and super high corrosion resistance make it the best anti-corrosion and waterproof candidate material for harsh water environments such as high temperature and deep sea. [0003] On the other hand, since the early 1980s, polyurethane has been used more and more widely as a new type of excellent waterproof coating, with increasing brands and expanding production scale, playing more and more roles in various sectors of the national economy and in all aspects of daily...

AI Technical Summary

Problems solved by technology

[0004] The main advantages and disadvantages of polyurethane as an anti-corrosion and waterproof coating: the advantages are mainly reflected in wear resistance, oil resistance, ozone resistance, aging resistance, radiation resistance, low temperature resistance, good sound permeability, and strong adhesion, but there are general high temperature resistance, poor resistance Disadvantages such as strong polar solvents and strong acid-base media. For example, at a certain temperature, alcohols, acids, and ketones will cause polyurethane to swell and degrade. Solvents such as chloroform, methylene chloride, dimethylformamide, and trichloroethylene can will make the polyurethane elastomer swell

[0005] The main advantages and disadvantages of graphene in anti-corrosion and waterproof: graphene-stabilized sp 2 The hybrid structure enables it to form a physical barrier between the metal and the active medium, preventing the diffusion and penetration of gas or liquid molecules

However, in the composite materials of graphene and polyurethane in the prior art, the problem of significant agglomeration of graphene sheets or films in polyurethane is still difficult to solve, which affects the performance of the composite material and limits its application.

Images