A preparation method of hollow mesoporous silica\aps\graphene oxide nanocontainer

A mesoporous silica, \APS\ technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problem of unsatisfactory coating corrosion resistance, reduced corrosion resistance of organic coatings, poor dispersion To achieve long-term corrosion protection, improve dispersion, and improve service life

Active Publication Date: 2022-02-22
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the actual effect, due to the poor dispersion of graphene oxide in epoxy coating, its application as a filler is greatly limited, and the corrosion resistance effect of the coating is not very ideal. Therefore, the improvement of graphene oxide in organic Coating dispersion is imperative
In addition, the graphene oxide coating can only play a passive protective role. Once the coating is subjected to external forces or environmental factors and a small defect occurs, the graphene oxide, which only has shielding properties, cannot repair the defect, resulting in a greatly reduced corrosion resistance of the organic coating.

Method used

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  • A preparation method of hollow mesoporous silica\aps\graphene oxide nanocontainer
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  • A preparation method of hollow mesoporous silica\aps\graphene oxide nanocontainer

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Weigh 1 g of cetyltrimethylammonium bromide (CTAB) and add it into a mixed solution of 110 mL of ethanol and 10 mL of water and stir evenly. Add 2 mL of copolymer microsphere template solution to the mixed solution, and sonicate for 10 minutes. The resulting solution was transferred to a 250 mL three-neck flask, and stirred in a water bath at 50° C. for 1 hour. The pH of the solution was adjusted to alkaline by adding 6 mL of ammonia water, and stirring was continued for 10 minutes. Then, 3 mL of tetraethyl orthosilicate (TEOS) was added, and the temperature was kept constant, and stirring was continued for 6 hours to complete the reaction. The resulting slurry was centrifuged at a rotational speed of 4000r / min, and the supernatant was removed. The precipitate was washed three times with water and ethanol, then dried in vacuum at 60°C for 24 hours, and the resulting product was calcined in a muffle furnace at 550°C for 3 hours to remove the microsphere template an...

Embodiment 2

[0034] (1) Weigh 0.5 g of cetyltrimethylammonium bromide (CTAB) and add it into a mixed solution of 55 mL of ethanol and 5 mL of water and stir evenly. Add 1 mL of copolymer microsphere template solution to the mixed solution, and sonicate for 15 minutes. The resulting solution was transferred to a 100 mL three-necked flask, and stirred in a water bath at 55° C. for 1.5 hours. The pH of the solution was adjusted to alkaline by adding 3 mL of ammonia water, and stirring was continued for 15 minutes. Then, 1.5 mL of tetraethyl orthosilicate (TEOS) was added, and the temperature was kept constant, and stirring was continued for 7 hours to complete the reaction. The resulting slurry was centrifuged at a rotational speed of 4000r / min, and the supernatant was removed. The precipitate was washed three times with water and ethanol, and then vacuum-dried at 60°C for 25 hours, and the resulting product was calcined in a muffle furnace at 550°C for 4 hours to remove the microsphere tem...

Embodiment 3

[0039] (1) Weigh 1 g of cetyltrimethylammonium bromide (CTAB) and add it into a mixed solution of 110 mL of ethanol and 10 mL of water and stir evenly. Add 2 mL of copolymer microsphere template solution to the mixed solution, and sonicate for 15 minutes. The resulting solution was transferred to a 250 mL three-necked flask, and stirred in a water bath at 60° C. for 1 hour. The pH of the solution was adjusted to alkaline by adding 6 mL of ammonia water, and stirring was continued for 10 minutes. Then, 3 mL of tetraethyl orthosilicate (TEOS) was added, and the temperature was kept constant, and stirring was continued for 6 hours to complete the reaction. The resulting slurry was centrifuged at a rotational speed of 4000r / min, and the supernatant was removed. The precipitate was washed three times with water and ethanol, and then vacuum-dried at 60°C for 24 hours, and the resulting product was calcined in a muffle furnace at 550°C for 5 hours to remove the microsphere template...

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Abstract

The present invention provides a method for preparing hollow mesoporous silica\APS\graphene oxide nano-container. The hollow mesoporous silica is mixed with aminopropyltrimethoxysilane for modification, and then the modified hollow mesoporous Pore ​​silicon dioxide is grafted onto the graphene oxide surface to make a hollow mesoporous silicon dioxide\APS\graphene oxide nano-container that has good dispersion in the epoxy coating and can load corrosion inhibitors; the present invention improves Improve the dispersion of graphene oxide in epoxy coating, which will greatly improve the service life of graphene oxide epoxy coating. The present invention also solves the limitation that graphene oxide can only provide passive protective function in epoxy coating, and makes graphene oxide into a nano-container that can load corrosion inhibitors, and the active corrosion protection function will provide long-term protection for metal substrates. corrosion protection.

Description

technical field [0001] The invention belongs to the field of surface treatment of metal materials. Specifically, the invention relates to a hollow mesoporous silica / aminopropyl based on a graphene oxide-based load corrosion inhibitor with good dispersion in epoxy coatings. Preparation method of trimethoxysilane (APS)\graphene oxide nanocontainer. Background technique [0002] Epoxy resins are often used on metal surfaces to protect metal substrates from corrosion because of their good corrosion resistance, heat resistance, and strong adhesion to metals. However, during the preparation of the epoxy resin coating, the volatilization of the solvent makes tiny pores easily appear inside the coating, resulting in a decrease in the corrosion resistance of the coating. In order to prolong the time for water and corrosive ions (such as chloride ions) to reach the metal substrate and improve the service life of the coating, some fillers are usually added to the epoxy resin to enhanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08
CPCC09D163/00C09D5/08C08K2201/011
Inventor 王艳力闫大帅张萌刘嘉亮张振华
Owner HARBIN ENG UNIV
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