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Sulfur ion response type nano container and application

A technology of nano-container and sulfide ion, applied in the direction of application, nanotechnology, nanotechnology, etc., can solve the problems of failure to realize intelligent protection against microbial corrosion, achieve good research and development application prospects, avoid coating performance damage, avoid coating The effect of shortening the service life of layers

Active Publication Date: 2020-12-15
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fillers prepared by the above inventions have pH responsiveness, can respond to changes in the pH of the microenvironment caused by corrosion, and release corrosion inhibitors to achieve the purpose of repairing the protective coating, these inventions are only applicable to localized corrosion caused by corrosive chloride ions For the protection of microbial corrosion widely suffered by metals in nature, especially the intelligent protection of microbial corrosion represented by sulfate-reducing bacteria has not yet been realized.

Method used

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  • Sulfur ion response type nano container and application
  • Sulfur ion response type nano container and application
  • Sulfur ion response type nano container and application

Examples

Experimental program
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Effect test

Embodiment 1

[0048] (1) Preparation of ZIF-8 template

[0049] Weigh 1.5g zinc nitrate hexahydrate and dissolve it in 100mL methanol to obtain a methanol solution (solution A) of 15g / L zinc nitrate; weigh 3.3g 2-methylimidazole and dissolve it in 100mL methanol to obtain a concentration of 33g / L L 2-methylimidazole methanol solution (solution B), pour solution A into solution B and mix, stir at 2000rpm / min for 60min to react, centrifuge, wash with methanol 3 times, dry at 60°C overnight to obtain ZIF- 8 nanoparticles.

[0050] (2) Preparation of HMSNs

[0051] Measure 540mL of a mixed solution of deionized water and absolute ethanol, wherein the volume ratio of water and absolute ethanol is 5:4; weigh 0.5g of ZIF-8 solid powder and disperse it in the mixed solution, and ultrasonicate for 30min; weigh 1.6g Dissolve cetyltrimethylammonium bromide in the above dispersion, and stir at room temperature for 30 minutes; measure 400 μL of 0.05 M sodium hydroxide solution into the above solution,...

Embodiment 2

[0059] (1) Preparation of ZIF-8 template

[0060] Weigh 3g of zinc nitrate hexahydrate and dissolve it in 100mL of methanol to obtain a methanol solution (solution A) of 30g / L zinc nitrate; weigh 6.6g of 2-methylimidazole and dissolve it in 100mL of methanol to obtain a concentration of 66g / L 2-Methylimidazole methanol solution (solution B), pour solution A into solution B and mix, stir at 2000rpm / min for 60min to react, centrifuge, wash with methanol 3 times, dry at 60°C overnight to obtain ZIF-8 nanoparticles.

[0061] (2) Preparation of HMSNs

[0062] Measure 540mL of a mixed solution of deionized water and absolute ethanol, wherein the volume ratio of water and absolute ethanol is 5:4; weigh 0.5g of ZIF-8 solid powder and disperse it in the mixed solution, and ultrasonicate for 30min; weigh 1.6g Dissolve cetyltrimethylammonium bromide in the above dispersion, and stir at room temperature for 30 minutes; measure 400 μL of 0.1M sodium hydroxide solution into the above soluti...

Embodiment 3

[0071] (1) Preparation of ZIF-8 template

[0072] Weigh 4.5g zinc nitrate hexahydrate and dissolve it in 100mL methanol to obtain a methanol solution (solution A) of 45g / L zinc nitrate; weigh 9.9g 2-methylimidazole and dissolve it in 100mL methanol to obtain a concentration of 99g / L L 2-methylimidazole methanol solution (solution B), pour solution A into solution B and mix, stir at 2000rpm / min for 60min to react, centrifuge, wash with methanol 3 times, dry at 60°C overnight to obtain ZIF- 8 nanoparticles.

[0073] (2) Preparation of HMSNs

[0074] Measure 540mL of a mixed solution of deionized water and absolute ethanol, wherein the volume ratio of water and absolute ethanol is 5:4; weigh 0.5g of ZIF-8 solid powder and disperse it in the mixed solution, and ultrasonicate for 30min; weigh 1.6g Dissolve cetyltrimethylammonium bromide in the above dispersion, and stir at room temperature for 30 minutes; measure 400 μL of 0.2 M sodium hydroxide solution into the above solution, ...

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Abstract

The invention relates to the field of anticorrosive paint, in particular to a sulfur ion response type nano container, application of the sulfur ion response type nano container as a microbial corrosion (sulfate reducing bacteria corrosion) intelligent protective coating material and a preparation method of the coating material. Hollow mesoporous silica nanoparticles (HMSNs) are taken as a core, 2-methylimidazole zinc salt (ZIF-8) is taken as a shell (a nano valve), and a bactericide is loaded in a cavity of the HMSNs, so that the target nano container is obtained. The microbial corrosion intelligent protective coating based on the sulfur ion response type nano container can actively respond to the change of the concentration of microenvironment sulfur ions caused by sulfate reducing bacteria, fixed-point, timed and quantitative controlled release of the bactericide is achieved, and the released bactericide plays a role in sterilization and microbial corrosion protection; and the problems of shortening of the service life of the coating, improvement of the cost, environmental problems caused by excessive release of the bactericide and microbial drug resistance due to spontaneous leakage of the bactericide in the past are avoided.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a sulfur ion-responsive nano container and its application as an intelligent protective coating material for microbial corrosion (sulfate-reducing bacteria corrosion) and a preparation method for the coating material. Background technique [0002] Metal corrosion occurs in almost all natural environments, especially in the ocean. The metabolites of marine microorganisms can accelerate the metal corrosion process. The metal corrosion process under the action of microorganisms is called microbial corrosion. Sulfate-reducing bacteria are a typical corrosive microorganism that exists in the ocean. During the respiration of sulfate-reducing bacteria, intracellular sulfate is reduced to hydrogen sulfide ions, which can combine with hydrogen protons to generate hydrogen sulfide. Or lose protons to generate sulfur ions, causing serious corrosion of metals under the biofilm (Documen...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09D5/14C09D167/08A01N25/26A01N43/50A01N31/16A01N43/80A01N37/34A01N43/16A01N37/46A01P1/00B82Y30/00B82Y40/00
CPCC09D5/08C09D5/14C09D167/08A01N25/26A01N43/50A01N31/16A01N43/80A01N37/34A01N43/16A01N37/46B82Y30/00B82Y40/00C08K9/12C08K9/10C08K5/3445
Inventor 王鹏张盾蔡昊原
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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