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Intelligent response self-repairing anticorrosive coating material and preparation method thereof

An anti-corrosion coating and self-repairing technology, applied in anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of capsule core material deactivation, large microcapsule particle size, poor binding force, etc., to ensure activity, Effects of improving bonding performance and improving anti-corrosion performance

Active Publication Date: 2019-08-02
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most of the microcapsule inorganic carriers have poor binding force with the coating, resulting in accelerated water penetration of the coating and premature release of the capsule core.
However, the size of the microcapsules prepared in the organic microcapsule system is large, and the self-repair effect is not ideal; in addition, in the traditional organic microcapsule preparation method, the active material of the capsule core is easy to react with the organic reagent, resulting in the inactivation of the capsule core material, which is harmful to steel. No corrosion inhibition

Method used

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  • Intelligent response self-repairing anticorrosive coating material and preparation method thereof
  • Intelligent response self-repairing anticorrosive coating material and preparation method thereof
  • Intelligent response self-repairing anticorrosive coating material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A method for preparing an intelligent response self-repairing anti-corrosion coating material, comprising the following steps:

[0037] S1. Add zinc acetate to the triethylene glycol solution, the concentration of zinc acetate is 3mM; heat to 160 and keep the temperature for 30min under vigorous stirring, after cooling to room temperature, centrifuge and collect the solid product to obtain porous zinc oxide nano powder;

[0038] S2. The above-mentioned porous zinc oxide nanopowder is uniformly dispersed in deionized water to obtain solution A, and the mass concentration of porous zinc oxide in solution A is 25mg / mL; the corrosion inhibitor benzotriazole is dissolved in deionized water to obtain Solution B, the mass concentration of corrosion inhibitor in solution B is 16mg / mL; mix solution A and solution B and stir at low speed for 5h; then add 2mg / mL dimethylimidazole solution and react for 30min to generate ZIF on the surface of porous zinc oxide -8 film to encapsula...

Embodiment 2

[0041] A method for preparing an intelligent response self-repairing anti-corrosion coating material, comprising the following steps:

[0042] S1. Add zinc acetate to the triethylene glycol solution, the concentration of zinc acetate is 3mM; heat to 160 and keep the temperature for 30min under vigorous stirring, after cooling to room temperature, centrifuge and collect the solid product to obtain porous zinc oxide nano powder;

[0043] S2. The above-mentioned porous zinc oxide nanopowder is uniformly dispersed in deionized water to obtain solution A, and the mass concentration of porous zinc oxide in solution A is 20mg / mL; the corrosion inhibitor benzotriazole is dissolved in deionized water to obtain Solution B, the mass concentration of corrosion inhibitor in solution B is 16mg / mL; mix solution A and solution B and stir at low speed for 5h; then add 2mg / mL dimethylimidazole solution and react for 30min to generate ZIF on the surface of porous zinc oxide -8 film to encapsula...

Embodiment 3

[0046] A method for preparing an intelligent response self-repairing anti-corrosion coating material, comprising the following steps:

[0047] S1. Add zinc acetate into the triethylene glycol solution, the concentration of zinc acetate is 5mM; heat to 180°C under vigorous stirring and keep the temperature for 50min, after cooling to room temperature, centrifuge and collect the solid product to obtain porous zinc oxide Nano powder;

[0048] S2. The above-mentioned porous zinc oxide nanopowder is uniformly dispersed in deionized water to obtain solution A, and the mass concentration of porous zinc oxide in solution A is 20mg / mL; the corrosion inhibitor benzotriazole is dissolved in deionized water to obtain Solution B, the mass concentration of corrosion inhibitor in solution B is 20mg / mL; mix solution A and solution B and stir at low speed for 3h; then add 6mg / mL dimethylimidazole solution to react for 50min, and generate ZIF on the surface of porous zinc oxide -8 film to enca...

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Abstract

The invention discloses an intelligent response self-repairing anticorrosive coating material and a preparation method. The coating material comprises zinc oxide microcapsules and a coating matrix; each zinc oxide microcapsule comprises a capsule core and a capsule core carrier, the capsule core is a corrosion inhibitor, and the capsule core carrier is porous zinc oxide; and the outer surface of the capsule core carrier is coated with a ZIF-8 membrane. The porous inorganic material ZnO ensures the activity of the corrosion inhibitor, and the ZIF-8 membrane formed on the surface of the ZnO cannot only improve the bonding performance, but also serve as a hole sealing material to prevent premature release of the corrosion inhibitor. The invention successfully constructs the anticorrosive coating material with double effects of pH response and self-repairing. When the coating cracks, the microcapsules rupture and release the corrosion inhibitor, thereby realizing a self-repairing function; when no obvious damage is caused to the coating, and internal corrosion has already occurred, the microcapsules can be degraded and automatically release the corrosion inhibitor according to the change of pH value around a corrosion site, thereby realizing the self-repairing function.

Description

technical field [0001] The invention belongs to the technical field of self-repairing anticorrosion coatings. More specifically, it relates to an intelligent response self-healing anti-corrosion coating material and a preparation method. Background technique [0002] Due to their excellent physical and chemical properties, metal materials are widely used in military industry, civilian use, deep sea, petroleum and people's daily life. However, there are defects in the metal casting process. In the process of use, there are external forces, corrosive media and other factors, and the metal material is inevitably damaged, such as fracture, corrosion and wear. And in terms of thermodynamics, the corrosion of metals is a process in which the Gibbs free energy decreases, and it is a spontaneous process that leads to metals being more prone to corrosion. The corrosion of metal is generally carried out in two ways: chemical corrosion caused by the direct chemical reaction between t...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09D163/00
CPCC09D5/08C09D163/00C08K9/10C08K5/3475
Inventor 李伟华赵秀蓉
Owner SUN YAT SEN UNIV
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