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Self-repairing paint and preparation method thereof

A self-repairing and coating technology, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as poor repair effect, and achieve large load capacity, load capacity corrosion inhibitor release-response, and good repair ability Effect

Inactive Publication Date: 2017-09-26
王建东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a self-repairing paint and its preparation method for the problem of poor repairing effect of corrosion damage in the traditional microcapsule self-repairing paint in the natural environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Take 0.75g of cetyltrimethylammonium bromide, add 300mL of deionized water and mix evenly, then add 3.0mL of 8% sodium hydroxide solution, stir at 400r / min at 80°C for 2h, and then Add 4.0mL tetraethyl orthosilicate dropwise at 0.2mL / min, keep stirring at 600r / min for 2h, filter to obtain the precursor, wash the precursor with 5% hydrochloric acid for 5 times to obtain the pretreated precursor; take 0.75g pretreated Treat the precursor, add 7.5mL of 37% hydrochloric acid to 150mL of isopropanol, incubate at 65°C for 5 hours, filter to obtain a filter cake, wash the filter cake with deionized water and methanol for 8 times, and wash the washed The filter cake was placed in a vacuum drying oven and dried to constant weight at 40°C to obtain mesoporous silica nanospheres; take 0.75 g of mesoporous silica nanospheres and add 15 mL of 12% benzotriazole In the ethanol solution, under 50kPa, stir at 600r / min for 3h, then put it in a vacuum box and let it stand for 2h, then cen...

example 2

[0027]Take 0.50g of cetyltrimethylammonium bromide, add 200mL of deionized water and mix evenly, then add 1.5mL of 8% sodium hydroxide solution, stir at 300r / min at 70°C for 1h, and then Add 2.5mL tetraethyl orthosilicate dropwise at 0.1mL / min, keep stirring at 500r / min for 1h, filter to obtain the precursor, wash the precursor with 5% hydrochloric acid for 3 times to obtain the pretreated precursor; take 0.50g of pretreated Treat the precursor, add 5.0mL of 37% hydrochloric acid into 100mL of isopropanol, incubate at 60°C for 4 hours, filter to obtain a filter cake, wash the filter cake with deionized water and methanol for 5 times, and wash the washed The filter cake was placed in a vacuum drying oven and dried to constant weight at 30°C to obtain mesoporous silica nanospheres; take 0.50 g of mesoporous silica nanospheres and add 10 mL of 12% benzotriazole In the ethanol solution, under 10kPa, stir at 500r / min for 2h, then put it in a vacuum box and let it stand for 1h, then...

example 3

[0029] Take 0.65g of cetyltrimethylammonium bromide, add 250mL of deionized water and mix evenly, then add 2.5mL of 8% sodium hydroxide solution, stir at 350r / min at 75°C for 2h, and then Add 3.0mL tetraethyl orthosilicate dropwise at 0.1mL / min, keep stirring at 550r / min for 1h, filter to obtain the precursor, wash the precursor with 5% hydrochloric acid for 4 times to obtain the pretreated precursor; take 0.62g of pretreated Treat the precursor, add 6.5mL of 37% hydrochloric acid into 130mL of isopropanol, incubate at 62°C for 4 hours, filter to obtain a filter cake, wash the filter cake with deionized water and methanol for 7 times, and then wash the washed The filter cake was placed in a vacuum drying oven and dried to constant weight at 35°C to obtain mesoporous silica nanospheres; take 0.62g of mesoporous silica nanospheres and add 12mL of 12% benzotriazole In the ethanol solution, under 40kPa, stir at 550r / min for 2h, then put it in a vacuum box and let it stand for 1h, ...

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Abstract

The invention relates to self-repairing paint and a preparation method thereof, and belongs to the technical field of metal protection. The preparation method comprises the following steps: adding self-made mesoporous silicon dioxide nanoparticles into a benzotriazole ethanol solution, and stirring to obtain mesoporous silicon dioxide nanoparticles loading a corrosion inhibitor; adding the mesoporous silicon dioxide nanoparticles loading the corrosion inhibitor into a zirconium n-propoxide alcohol solution and stirring; adding a nitric acid solution and stirring; filtering to obtain filter residues; adding the filter residues into a chitosan solution; after carrying out ultrasonic dispersion, centrifugally separating to obtain sediment; adding the sediment into a sodium alginate solution; after carrying out the ultrasonic dispersion, centrifugally separating to obtain a layer-by-layer packaged corrosion inhibitor; finally, uniformly stirring epoxy resin, a diluting agent, a curing agent, the layer-by-layer packaged corrosion inhibitor and a dispersant, and carrying out the ultrasonic dispersion to obtain the self-repairing paint. The self-repairing paint has the advantages of simplicity in preparation, large load capacity and corrosion inhibitor release-response function, and has a good repairing capability on coating corrosion damages caused by the natural environment.

Description

technical field [0001] The invention relates to a self-repairing coating and a preparation method thereof, belonging to the technical field of metal protection. Background technique [0002] In recent years, the effectiveness of using organic coatings for metal protection has become a consensus. It is generally believed that the protective effect of organic coatings on metal substrates is mainly reflected in the barrier effect of coatings on water and other corrosive particles, as well as special pigments, The corrosion inhibition, passivation, cathodic protection of the seasoning and the adhesion between the coating and the metal surface, however, the erosion of the natural environment and the damage caused by the coating defects are inevitable, and the erosive particles can reach the coating through these defects / substrate interface, eventually leading to coating failure. The emergence of self-healing coatings provides a realistic way for long-term protection of metals a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08
CPCC09D163/00C09D5/08C08L77/00C08K9/10C08K9/12
Inventor 薛银福薛焱璟王之霖
Owner 王建东
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