Self-repairing chitosan hydrogel corrosion-resistant coating and synthetic method thereof

An anti-corrosion coating and self-repairing technology, applied in anti-corrosion coatings, chitin polysaccharide coatings, polyester coatings, etc., can solve problems such as damage, small cracks, coating failure, etc., to avoid corrosion, improve corrosion resistance and durability properties, good water absorption and stability

Inactive Publication Date: 2018-11-20
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing coatings currently on the market are generally highly toxic, and are prone to fine cracks due to damage from external factors or changes in environmental conditions, resulting in failure of the coating

Method used

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  • Self-repairing chitosan hydrogel corrosion-resistant coating and synthetic method thereof
  • Self-repairing chitosan hydrogel corrosion-resistant coating and synthetic method thereof
  • Self-repairing chitosan hydrogel corrosion-resistant coating and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Self-healing chitosan hydrogel anti-corrosion coating, prepared from component A and component B;

[0027] Specific steps are as follows:

[0028] (1) Configure component A: mix 1.50g polyglutamic acid, 0.80g polyvinyl alcohol and 20g deionized water, and stir at room temperature for 45 minutes to make the solution evenly mixed;

[0029] (2) Prepare component B: mix 1.00g chitosan, 0.10g 1,2,4-triazole and 10g deionized water, stir at room temperature for 30 minutes, and mix thoroughly to obtain component B;

[0030] (3) Mix components A and B according to a mass ratio of 1:1, and mechanically stir at room temperature to obtain a self-repairing chitosan hydrogel anticorrosion coating.

[0031] The above-mentioned environment-friendly self-healing hydrogel anti-corrosion coating is subjected to a performance test:

[0032] The above-mentioned hydrogel anticorrosion coating is coated on the surface of the Q235 steel electrode, then soaked in simulated seawater, and an e...

Embodiment 2

[0034] Self-healing chitosan hydrogel anti-corrosion coating, prepared from component A and component B;

[0035] Specific steps are as follows:

[0036] (1) Configure component A: mix 0.80g polyglutamic acid, 0.80g polyalkylcyanoacrylate, 1.20g alginic acid and 25g deionized water, and stir at room temperature for 45 minutes to make the solution evenly mixed;

[0037] (2) Configure component B: mix 2.00g chitosan, 0.150g 2-mercaptobenzothiazole and 15g deionized water, stir at room temperature for 30 minutes, and mix thoroughly to obtain component B;

[0038] (3) Mix components A and B according to a mass ratio of 1:1, and mechanically stir at room temperature to obtain a self-repairing chitosan hydrogel anticorrosion coating.

[0039] The above-mentioned environment-friendly self-healing hydrogel anti-corrosion coating is subjected to a performance test:

[0040] The above-mentioned hydrogel anticorrosion coating is coated on the surface of the Q235 steel electrode, then s...

Embodiment 3

[0043] Self-healing chitosan hydrogel anti-corrosion coating, prepared from component A and component B;

[0044] Specific steps are as follows:

[0045] (1) Configure component A: Mix 2.50g polylactic acid, 0.80g carboxymethyl cellulose, 0.80g polyvinyl alcohol and 30g deionized water, and stir at room temperature for 45 minutes to make the solution evenly mixed;

[0046] (2) Configure component B: mix 1.00g chitosan, 0.10g dibenzothiazole disulfide and 15g deionized water, stir at room temperature for 30 minutes, and mix thoroughly to obtain component B;

[0047] (3) Mix components A and B at a mass ratio of 1:1.5, and mechanically stir at room temperature to obtain self-repairing chitosan hydrogel anticorrosion coating.

[0048] The above-mentioned environment-friendly self-healing hydrogel anti-corrosion coating is subjected to a performance test:

[0049] The above-mentioned hydrogel anticorrosion coating is coated on the surface of the Q235 steel electrode, then soaked...

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Abstract

The invention relates to the technical field of hydrogel preparation, in particular to a self-repairing chitosan hydrogel corrosion-resistant coating and a synthetic method thereof. The coating consists of a component A and a component B which are mixed according to the mass ratio of m(A) to m(B)=1:(0.5-2); the component A is a carrier material and an adhesive; and the component B is chitosan anda corrosion inhibitor. The hydrogel corrosion-resistant coating obtained by the synthetic method provided by the invention is green, environmentally-friendly, non-toxic and harmless to an environmentand excellent in self-repairing performance, can quickly and efficiently repair large-size cracks and achieves a corrosion protection effect.

Description

technical field [0001] The invention relates to the technical field of hydrogel preparation, in particular to a self-repairing chitosan hydrogel anticorrosion coating and a synthesis method thereof. Background technique [0002] Anti-corrosion coatings are widely used in the field of metal corrosion protection due to their advantages of simple operation and high cost performance. Existing coatings currently on the market are generally highly toxic, and are prone to fine cracks due to damage from external factors or changes in environmental conditions, resulting in failure of the coating. Therefore, environment-friendly self-healing coatings are receiving more and more attention from all walks of life. How to repair the coating at the same crack site multiple times to improve the anti-corrosion performance of the coating while ensuring environmental friendliness has become the research focus of many teams. Contents of the invention [0003] The object of the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D177/04C09D129/04C09D105/08C09D105/04C09D133/14C09D101/28C09D5/08C09D7/63
CPCC08L2203/20C08L2205/035C09D5/08C09D7/63C09D105/08C09D167/04C09D177/04C08L29/04C08L5/08C08L67/04C08L5/04C08L33/14C08K5/47C08L1/284
Inventor 王鑫王巍樊伟杰李伟华
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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