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Stimulus-responsive self-repair anticorrosive coating material and preparation method

A stimuli-responsive, anti-corrosion coating technology, applied in anti-corrosion coatings, coatings, epoxy coatings, etc., can solve the problems of high surface energy, no corrosion inhibition of steel, and decreased anti-corrosion performance of coatings, so as to improve the loading rate. And the effect of encapsulation rate, anti-corrosion performance improvement, and bonding performance improvement

Active Publication Date: 2019-08-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the encapsulation rate of microcapsules in the current microcapsule self-healing coating is relatively low, and the binding force with the coating is poor, which reduces the anti-corrosion performance of the coating.
Moreover, most of the microcapsules in the current self-healing coating resin are organic microcapsule systems. During the preparation process, the capsule core material is easy to react with the capsule shell material, which makes the capsule core material lose its repair ability.
In addition, the surface energy of the current inorganic microcapsule system is high, and it is easy to agglomerate in the coating, resulting in a decrease in the anti-corrosion performance of the coating, and has no corrosion inhibition effect on steel.

Method used

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  • Stimulus-responsive self-repair anticorrosive coating material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for preparing a stimulus-responsive self-repairing anti-corrosion coating material, comprising the following steps:

[0050] 1. Preparation of CuO microcapsules:

[0051] Measure methanol and N,N-dimethyldivinylamide (DMF) with a volume ratio of 1:1, and mix them thoroughly as a solvent; then, weigh 25g of 1,3,5-benzenetricarboxylic acid (BTC) and 35g Copper nitrate trihydrate was added to the mixed solution, and after it was completely dissolved, the solution was placed in the reaction kettle for 12 hours at 120°C; after the reaction kettle was cooled, it was filtered, washed and dried to obtain the Cu-MOF material; the Cu-MOF material was placed in a muffle Calcinate in a furnace at 600°C for 4 hours to obtain porous CuO; dissolve 10 g of benzotriazole (BTA) in deionized water, then add porous CuO, stir at a low speed of 300-600 rpm / min for 5 hours to encapsulate the corrosion inhibitor, filter and wash to collect samples, CuO microcapsules were obtained.

...

Embodiment 2

[0057] A method for preparing a stimulus-responsive self-repairing anti-corrosion coating material, comprising the following steps:

[0058] 1. Preparation of CuO microcapsules:

[0059] Measure methanol and N,N-dimethyldivinylamide (DMF) with a volume ratio of 1:1, and mix them thoroughly as a solvent; then, weigh 20g of 1,3,5-benzenetricarboxylic acid (BTC) and 30g Copper nitrate trihydrate was added to the mixed solution, and after it was completely dissolved, the solution was placed in the reaction kettle at 90°C for 12 hours; after the reaction kettle was cooled, it was filtered, washed and dried to obtain the Cu-MOF material; the Cu-MOF material was placed in a muffle Calcinate in a furnace at 500°C for 4 hours to obtain porous CuO; dissolve 10 g of benzotriazole (BTA) in deionized water, then add porous CuO, stir at a low speed of 300-600 rpm / min for 5 hours to encapsulate the corrosion inhibitor, filter and wash to collect samples, CuO microcapsules were obtained.

...

Embodiment 3

[0065] A method for preparing a stimulus-responsive self-repairing anti-corrosion coating material, comprising the following steps:

[0066] 1. Preparation of CuO microcapsules:

[0067] Measure methanol and N,N-dimethyldivinylamide (DMF) with a volume ratio of 1:3, and mix them thoroughly as a solvent; then, weigh 20g of 1,3,5-benzenetricarboxylic acid (BTC) and 30g Copper nitrate trihydrate was added to the mixed solution, and after it was completely dissolved, the solution was placed in the reaction kettle for 10 hours at 80°C; after the reaction kettle was cooled, it was filtered, washed and dried to obtain the Cu-MOF material; the Cu-MOF material was placed in a muffle Calcinate in a furnace at 400°C for 3 hours to obtain porous CuO; dissolve 10 g of benzotriazole (BTA) in deionized water, then add porous CuO, stir at a low speed of 300-600 rpm / min for 4 hours to encapsulate the corrosion inhibitor, filter and wash to collect samples, CuO microcapsules were obtained.

...

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Abstract

The invention discloses a stimulus-responsive self-repair anticorrosive coating material and a preparation method. The coating material comprises a CuO microcapsule and a coating matrix. The CuO microcapsule comprises a capsule core and a capsule core carrier, the capsule core is a corrosion inhibitor, and the capsule core carrier is porous CuO; and the surface of the CuO microcapsule is coated byan anionic polyelectrolyte layer and a cationic polyelectrolyte layer alternately. The invention successfully constructs the anticorrosive coating material with ph responsiveness and self-repair dualefficacy. The porous CuO can improve the loading rate and encapsulation rate of the capsule core substance; at the same time, the anionic polyelectrolyte can be adsorbed on the surface by means of layer-by-layer self-assembly, under the action of Coulomb force, then cationic polyelectrolyte can be adsorbed on the surface, thus improving the dispersibility of the microcapsule in the coating, solving the agglomeration problem of the porous substance CuO, and at the same time improving the bonding performance of the capsule core carrier and the coating matrix, and the anticorrosion performance of the coating material can be further improved.

Description

technical field [0001] The invention belongs to the technical field of self-repairing anticorrosion coatings. More specifically, it relates to a stimulus-responsive 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 the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C08G83/00
CPCC08G83/008C09D5/08C09D163/00C08K9/10C08K9/12C08K5/3475
Inventor 李伟华赵秀蓉
Owner SUN YAT SEN UNIV
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