Preparation method of metal organic framework/ water-borne anti-corrosive coating

Abstract

The invention discloses a preparation method of a metal organic framework / water-based anti-corrosive coating. The composite coating is formed by compounding a coordination compound of a metal organic framework (MOFs) and water-borne epoxy resin. As a novel organic hybrid material, the coordination compound of a metal organic framework (MOFs) has high void ratio and adjustability of hole dimension and shape; when the material gets the outside stimulation (such as pressure, light, chemical stimulation of a guest molecule), the framework shape can be changed. The preparation method introduces the metal organic framework material to an anti-corrosive coating system, thus the crosslinking density of the coating can be added, the corrosive particles can be absorbed; besides, the preparation method overcomes the shortcoming of poor barrier property and short anti-corrosive cycle which are generally existed in the water-borne anti-corrosive coating at present, and greatly improve the anti-corrosive performance of the anti-corrosive coating.

Description

technical field [0001] The invention relates to a preparation method of a coating, in particular to a preparation method of a metal organic framework / water-based anticorrosion coating. Background technique [0002] Metals and their alloys are still the most important structural materials, so metal corrosion is still one of the most noticeable problems. The great harm of corrosion is not only reflected in economic losses, but also brings heavy casualties, environmental pollution, waste of resources, hinders the development of new technologies, and promotes the loss of natural resources. Therefore, taking protective measures is of great significance to economic construction. There are many ways to prevent metal corrosion, but considering the needs of economy, convenience and national economic development, coatings have become the first choice to solve corrosion problems. [0003] In recent years, due to the restrictions on the volatilization of organic solvents by nation...

AI Technical Summary

Problems solved by technology

At present, there are three main methods to enhance the barrier properties of coatings: the first is to introduce nano-inorganic particles. Although this method is helpful to the barrier properties of water-based coatings, the poor compatibility between inorganic particles and organic coatings is likely to cause agglomeration, which makes the synthesis of coatings difficult. The difficulty of the process is greatly increased

The second method is to add nano-organic microspheres, which solves the compatibility problem between the filler and the matrix resin. However, due to the low mechanical strength of the organic microspheres, it is easy to cause the rupture of the spheres during the preparation of the coating, which makes The anti-corrosion effect of the coating cannot reach the ideal state

The third method is to use a coupling agent to modify the inorganic particles. Although this method improves the compatibility between the inorganic particles and the matrix resin to a certain extent, its disadvantage is that the process is complicated.

Therefore, existing water-based composite coatings are difficult to meet people's needs, and it is urgent to develop a new preparation method of water-based composite coatings.

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