Preparation method and application of anti-corrosion and anti-fouling integrated coating with self-repairing function

A self-healing and coating technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, epoxy resin coatings, etc., can solve problems such as accelerated electrode reaction, accelerated metal fouling, lack of antibacterial and anti-biofouling, etc. It achieves the effects of simple and efficient preparation process, excellent antibacterial and anti-biofouling properties, and good self-healing and anti-corrosion properties

Active Publication Date: 2022-03-25
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional self-healing coatings usually do not have antibacterial and anti-biofouling properties, and there are a large number of microbial corrosion caused by microbial attachment in the actual marine environment.
The life activities of microorganisms will change the interface state of metal materials, and the life activities of some microorganisms will directly participate in or change the electrochemical reaction process, thereby accelerating electrode reactions and metal fouling

Method used

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  • Preparation method and application of anti-corrosion and anti-fouling integrated coating with self-repairing function
  • Preparation method and application of anti-corrosion and anti-fouling integrated coating with self-repairing function
  • Preparation method and application of anti-corrosion and anti-fouling integrated coating with self-repairing function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Preparation of a bimetallic intercalation material loaded with a small molecule slow-release fungicide

[0043] (1) Accurately weigh 2.17g copper nitrate trihydrate and 1.69g aluminum nitrate nonahydrate and join in the beaker that 45mL deionized water and 15mL dimethyl sulfoxide mixed solution are housed, add 0.72g urea after fully stirring and dissolving, then Transfer the above mixed solution to a hydrothermal reaction kettle for hydrothermal reaction at 110°C for 12 hours, centrifuge, wash and dry after the reaction to obtain a copper-aluminum bimetallic intercalation material;

[0044] (2) Take 250 mg of the above-mentioned copper-aluminum bimetallic intercalation material and disperse it in 250 mL of deionized water, then slowly add 80 μL of sodium pyrithione ethanol solution with a concentration of 10 g / L to the dispersion, react at room temperature for 4 hours, and then Centrifuge, wash and dry to obtain the bimetallic intercalation material loaded wit...

Embodiment 2

[0045] Example 2 Preparation of a bimetallic intercalation material loaded with a small molecule slow-release fungicide

[0046] (1) Add 5.13g (2mmol) magnesium nitrate hexahydrate and 3.75g (1mmol) aluminum nitrate nonahydrate to a beaker containing 70mL deionized water, stir and dissolve, add 0.42g urea (7mmol), and then add the above The mixed solution was transferred to a hydrothermal reaction kettle for hydrothermal reaction at 140°C for 8 hours, and after the reaction, it was centrifuged, washed and dried to obtain a magnesium-aluminum bimetallic intercalation material;

[0047] (2) Take 100 mg of the above-mentioned magnesium-aluminum bimetallic intercalation material and disperse it in 100 mL of deionized water, then slowly add 32 μL of ethanol solution of sodium pyrithione with a concentration of 10 g / L to the dispersion, and react at room temperature for 4 hours. Centrifuge, wash and dry to obtain the bimetallic intercalation material loaded with small molecule slow-...

Embodiment 3

[0049] Example 3 Preparation and effect verification of anti-corrosion and anti-fouling integrated coating with self-repair function

[0050] 1. Preparation of anti-corrosion and anti-fouling integrated coating with self-healing function

[0051] Accurately weigh 25 mg of the bimetallic intercalation material loaded with small molecule slow-release bactericide prepared in Example 1 and add it to 4 g of epoxy resin, ultrasonically disperse for 30 min, then add 1 g of epoxy resin curing agent, and vacuum defoam for 10 min after fully stirring , to prepare an anti-corrosion and anti-fouling integrated coating with self-repairing function.

[0052] Coat the above-mentioned anti-corrosion and anti-fouling integrated coating on the surface of the prepared carbon steel electrode, and after being completely cured, make a bimetallic intercalation material coating with a loaded corrosion inhibitor, that is, an integrated anti-corrosion and anti-fouling with self-repairing function coat...

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Abstract

The invention belongs to the technical field of marine anti-corrosion and anti-fouling coatings, and particularly relates to a preparation method and application of an anti-corrosion and anti-fouling integrated coating with a self-repairing function. In order to reduce corrosion and biological fouling of a metal substrate, the preparation method comprises the following steps: firstly, preparing a bimetallic intercalation material through a hydrothermal method; and then loading a micromolecular slow-release bactericide into the bimetallic intercalation material by a one-step or multi-step ion exchange method to prepare the coating with biological fouling prevention, self-repairing and corrosion prevention functions. The anti-corrosion and anti-fouling integrated coating with a self-repairing function is constructed by preparing a bimetal intercalation material loaded with a small-molecule slow-release bactericide for the first time, the preparation process is simple and efficient, and the constructed coating has good self-repairing and anti-corrosion performance and excellent antibacterial and biological fouling prevention performance and can be widely applied to the field of coating materials. The method has important application prospects in the fields of metal corrosion protection and biological fouling control of ocean engineering equipment, ships and the like.

Description

technical field [0001] The invention belongs to the technical field of marine anti-corrosion and anti-fouling coatings, and in particular relates to a preparation method and application of an anti-corrosion and anti-fouling integrated coating with self-repairing function. Background technique [0002] Epoxy coatings are widely used in the field of metal corrosion protection in marine environments because of their excellent physical and chemical properties and good adhesion to metal substrates. However, in the actual working environment, the epoxy coating will form defects such as micropores and microcracks due to the volatilization of the solvent during the film formation process. In the high temperature, high humidity, high salt marine environment, the corrosive environment is more severe, and the corrosive medium will penetrate into the coating through the defects, which will destroy the physical shielding effect of the coating, thereby reducing the corrosion resistance of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D5/16
CPCC09D163/00C09D5/08C09D5/1662C09D5/1625C08K9/12C08K5/378
Inventor 刘宏伟金正宇
Owner SUN YAT SEN UNIV
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