A kind of sulfide ion responsive nano container and its application

A technology of nano-containers and sulfide ions, which is applied in the fields 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, and maintain a good phase capacitive effect

Active Publication Date: 2021-12-28
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of sulfide ion responsive nano container and its application
  • A kind of sulfide ion responsive nano container and its application
  • A kind of sulfide ion responsive nano container and its application

Examples

Experimental program
Comparison scheme
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 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. With hollow mesoporous silica nanoparticles (HMSNs) as the core and 2-methylimidazolium zinc salt (ZIF-8) as the shell (nano-valve), the bactericide is loaded inside the cavity of the HMSNs to obtain the target nano-container. The invention is based on the microbial corrosion intelligent protective coating of the sulfur ion responsive nano container, which can actively respond to the change of the sulfur ion concentration in the microenvironment caused by sulfate reducing bacteria, and realize the fixed-point, timing and quantitative control release of the fungicide, and the released sterilization The antibacterial agent plays the role of sterilization and microbial corrosion protection, avoiding the shortening of the service life of the coating, the increase of cost, and the environmental problems and microbial resistance problems caused by the excessive release of antimicrobial agents due to the spontaneous leakage of antimicrobial agents.

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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Patent Type & Authority Patents(China)
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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