A kind of preparation method of metal organic framework/waterborne anticorrosion coating

Abstract

The invention discloses a method for preparing a metal organic framework / water-based anticorrosion coating. The composite coating is formed by compounding a metal organic framework (MOFs) coordination compound and a water-based epoxy resin. Metal-organic framework (MOFs) coordination compounds, as a new type of organic-inorganic hybrid material, have high porosity, adjustable pore size and shape, and when subjected to external stimuli (such as pressure, light, and chemical stimuli from guest molecules), they will Change the shape of the skeleton. The present invention introduces the metal-organic framework material into the anti-corrosion coating system, which can not only increase the cross-linking density of the coating, but also absorb corrosion particles, which overcomes the disadvantages of poor barrier property and short anti-corrosion period commonly existing in current water-based anti-corrosion coatings, Greatly improved the anti-corrosion performance of the anti-corrosion 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 national l...

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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