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Sulfate reducing bacteria metabolism microenvironment response type composite coating and preparation method thereof

A composite coating and micro-environment technology, applied in coatings, epoxy resin coatings, anti-corrosion coatings, etc., can solve the problems of bacterial resistance and biological toxicity destroying the marine environment and ecological order, and achieve excellent microbial corrosion protection capabilities , cost avoidance, good compatibility effect

Active Publication Date: 2021-10-01
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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  • Sulfate reducing bacteria metabolism microenvironment response type composite coating and preparation method thereof
  • Sulfate reducing bacteria metabolism microenvironment response type composite coating and preparation method thereof
  • Sulfate reducing bacteria metabolism microenvironment response type composite coating and preparation method thereof

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 for 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 sulfate-reducing bacteria metabolic microenvironment-responsive nanoparticles use ZIF-90 as the skeleton material, and the antibacterial agent 4,5-dichloro-N-octyl-4-isothiazoline- 3-ketones and the corrosion inhibitor benzotriazole.

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

[0046] The specific prepara...

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 sulfate-reducing bacteria metabolic microenvironment-responsive nanoparticles encapsulated with a fungicide and doped encapsulation Sulfate-reducing bacteria with corrosion inhibitors metabolize microenvironment-responsive nanoparticles for anti-corrosion primers.

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

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

[0057] The specific preparation method and steps of the sulfate-r...

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 bactericide-encapsulated sulfate-reducing bacteria metabolic microenvironment-responsive nanoparticles and doped encapsulation Sulfate-reducing bacteria with corrosion inhibitors metabolize microenvironment-responsive nanoparticles for anti-corrosion primers.

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

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

[0069] (1) Preparation of DCOIT@ZIF-90 nanoparticles

[0070] Weigh 3...

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Abstract

The invention relates to the technical field of anticorrosive paint, in particular to a sulfate reducing bacteria metabolism microenvironment response type intelligent coating and a preparation method thereof. The sulfate reducing bacteria metabolism microenvironment response type composite coating comprises an antibacterial surface layer and an anti-corrosion bottom layer, nano particles for packaging a bactericide are doped in the antibacterial surface layer, and nano particles for packaging a corrosion inhibitor are doped in the anti-corrosion bottom layer; the nanoparticles are sulfate reducing bacteria metabolism microenvironment response type nanoparticles. The sulfate reducing bacteria metabolism microenvironment response type nanoparticles have a sulfur ion response release function. The bactericide or the corrosion inhibitor is packaged in the framework structure of the nano particles, uncontrollable leakage is avoided, when sulfate reducing bacteria are massively propagated and metabolized to generate sulfur ions, and metal tends to be corroded, the nano particles can respond to the increased sulfur ion concentration in the corrosion microenvironment and decompose the sulfur ions, so that the timed, fixed-point and quantitative controlled release of the functional molecules is realized, and the problems of cost and environment caused by uncontrollable release of the functional molecules are avoided.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, and relates to a microenvironment-responsive intelligent coating for metabolism of sulfate-reducing bacteria 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 able to trigger 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 i...

Claims

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Application Information

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Patent Type & Authority Applications(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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