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Preparation method of hollow mesoporous silica\APS\graphene oxide nano container

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

Active Publication Date: 2020-04-24
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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  • Preparation method of hollow mesoporous silica\APS\graphene oxide nano container

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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 invention provides a preparation method of a hollow mesoporous silica\APS\graphene oxide nano container. According to the invention, hollow mesoporous silica and aminopropyltrimethoxysilane are mixed for modification, then the modified hollow mesoporous silica is grafted to the surface of graphene oxide, and the hollow mesoporous silica\APS\graphene oxide nano container which has good dispersity in an epoxy coating and can load a corrosion inhibitor is prepared. According to the preparation method, the dispersity of the graphene oxide in the epoxy coating is improved, so that the service life of the graphene oxide epoxy coating is greatly prolonged. The limitation that graphene oxide can only provide a passive protection function in an epoxy coating is also solved, the graphene oxide is prepared into a nano container capable of loading a corrosion inhibitor, and the active corrosion protection function can provide long-acting corrosion protection for a metal substrate.

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 Applications(China)
IPC IPC(8): C09D163/00C09D5/08
CPCC09D163/00C09D5/08C08K2201/011C08K9/12C08K9/06C08K7/26C08K3/042C08K5/47
Inventor 王艳力闫大帅张萌刘嘉亮张振华
Owner HARBIN ENG UNIV
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