A kind of sulfate-reducing bacteria metabolic microenvironment responsive composite coating and its preparation method

A composite coating and micro-environment technology, applied in coatings, epoxy resin coatings, polyester coatings, etc., can solve the problems of bacterial resistance and biological toxicity that destroy the marine environment and ecological order, and achieve excellent microbial corrosion protection ability, inhibition of microbial corrosion, and good compatibility

Active Publication Date: 2022-06-28
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of polymer coatings with specific structures / functions and biocidal additives have been extensively studied due to their advantages in antifouling and anticorrosion. However, the inevitable leaching of biocides in coatings, potential bacterial resistance and Biological toxicity may seriously disrupt the marine environment and ecological order

Method used

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  • A kind of sulfate-reducing bacteria metabolic microenvironment responsive composite coating and its preparation method
  • A kind of sulfate-reducing bacteria metabolic microenvironment responsive composite coating and its preparation method
  • A kind of sulfate-reducing bacteria metabolic microenvironment responsive composite coating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 The sulfate-reducing bacteria metabolic microenvironment-responsive composite coating provided in this example mainly includes: an antibacterial surface layer doped with micro-environment-responsive nanoparticles of sulfate-reducing bacteria metabolism and encapsulated with a bactericide, and an antibacterial surface layer doped with encapsulation Anticorrosion primers of microenvironment-responsive nanoparticles of sulfate-reducing bacteria with corrosion inhibitors.

[0044]Among them, the microenvironment-responsive nanoparticles of sulfate-reducing bacteria metabolism use ZIF-90 as the skeleton material, and the antibacterial agent 4,5-dichloro-N-octyl-4-isothiazoline-4,5-dichloro-N-octyl-4-isothiazoline- 3-ketone and corrosion inhibitor benzotriazole.

[0045] The amount of sulfate-reducing bacteria metabolic microenvironment-responsive nanoparticles was 4% of the mass of the antibacterial surface layer base material and the anti-corrosion bottom layer ba...

Embodiment 2

[0054] Example 2 The sulfate-reducing bacteria metabolic microenvironment-responsive composite coating provided in this example mainly includes: an antibacterial surface layer doped with micro-environment-responsive nanoparticles of sulfate-reducing bacteria metabolism and encapsulated with a bactericide, and an antibacterial surface layer doped with encapsulation Anticorrosion primers of microenvironment-responsive nanoparticles of sulfate-reducing bacteria with corrosion inhibitors.

[0055] Among them, the microenvironment-responsive nanoparticles of sulfate-reducing bacteria metabolism use ZIF-90 as the skeleton material, and the antibacterial agent 4,5-dichloro-N-octyl-4-isothiazoline-4,5-dichloro-N-octyl-4-isothiazoline- 3-ketone and corrosion inhibitor benzotriazole.

[0056] The amount of sulfate-reducing bacteria metabolic microenvironment-responsive nanoparticles was 6% of the mass of the antibacterial surface layer base material and the anti-corrosion bottom layer b...

Embodiment 3

[0066] Example 3 The sulfate-reducing bacteria metabolic microenvironment-responsive composite coating provided in this example mainly includes: an antibacterial surface layer doped with micro-environment-responsive nanoparticles for sulfate-reducing bacteria metabolism and encapsulated with a bactericide, and a doping encapsulation Anticorrosion primers of microenvironment-responsive nanoparticles of sulfate-reducing bacteria with corrosion inhibitors.

[0067] Among them, the microenvironment-responsive nanoparticles of sulfate-reducing bacteria metabolism use ZIF-90 as the skeleton material, and the antibacterial agent 4,5-dichloro-N-octyl-4-isothiazoline-4,5-dichloro-N-octyl-4-isothiazoline- 3-ketone and corrosion inhibitor benzotriazole.

[0068] The amount of sulfate-reducing bacteria metabolic microenvironment-responsive nanoparticles was 8% of the mass of the antibacterial surface layer base material and the anti-corrosion bottom layer base material.

[0069] (1) Prep...

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Abstract

The invention relates to the technical field of anti-corrosion coatings, and relates to a sulfate-reducing bacteria metabolic microenvironment responsive intelligent coating and a preparation method thereof. A composite coating responsive to the microenvironment of sulfate-reducing bacteria metabolism, comprising an antibacterial surface layer and an anti-corrosion bottom layer, wherein the anti-bacterial surface layer is doped with nanoparticles encapsulating bactericides, and the anti-corrosion bottom layer is doped with encapsulating corrosion inhibitors Nanoparticles; the nanoparticles are sulfate-reducing bacteria metabolic microenvironment responsive nanoparticles. In the present invention, the sulfate-reducing bacteria metabolic microenvironment responsive nanoparticles have the function of releasing sulfur ions in response. Bactericides or corrosion inhibitors are encapsulated in the skeleton structure of nanoparticles to avoid uncontrollable leakage. When sulfate-reducing bacteria proliferate and metabolize to produce sulfur ions, which lead to the corrosion tendency of metals, nanoparticles can reduce the increase in the corrosion microenvironment. The sulfide ion concentration responds and decomposes, realizing the timing, fixed point, and quantitative control release of functional molecules, avoiding the cost and environmental problems caused by the uncontrollable release of functional molecules.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, and relates to a sulfate-reducing bacteria metabolic microenvironment-responsive intelligent coating and a preparation method thereof. Background technique [0002] Marine organisms (bacteria, algae, mollusks) will adhere to the surface of any material immersed in seawater, known as biofouling. This process is accompanied by the formation of bacterial colonies and biofilms, leading to microbial corrosion of metal materials. Many bacteria are capable of triggering microbial corrosion under aggregated biofilms. Among them, the most typical corrosion microorganisms are sulfate-reducing bacteria, which mainly use sulfate as an electron acceptor for anaerobic oxidation of inorganic or organic substrates by sulfate-reducing bacteria. During the metabolic process, a large amount of reduced sulfur ions are generated and accumulated near the biofilm. The sulfur ions combine with metal ion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D5/14C09D167/08C09D163/00
CPCC09D5/08C09D5/14C09D167/08C09D163/00C09D7/67C08K2201/011C08K9/12C08K5/47C08K5/3475
Inventor 王鹏张盾蔡昊原
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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