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Acid-base dual-response hollow mesoporous silica composite nano container, self-repairing anticorrosive coating and preparation method thereof

A technology of mesoporous silica and nano-containers, which is applied in anti-corrosion coatings, epoxy resin coatings, dyed polymer organic compound treatment, etc., can solve problems such as easy collapse, improve compatibility and prevent corrosion inhibitors leaked effect

Active Publication Date: 2020-06-05
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, silica itself is also a material that responds to alkaline environments, and its structure is prone to collapse in alkaline environments, so it can meet the requirements of releasing loads in response to alkaline environmental stimuli. At present, there is no research on hollow media Application of Porous Silica in Composite Nanocontainer with Dual Response to Acid and Base

Method used

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  • Acid-base dual-response hollow mesoporous silica composite nano container, self-repairing anticorrosive coating and preparation method thereof
  • Acid-base dual-response hollow mesoporous silica composite nano container, self-repairing anticorrosive coating and preparation method thereof
  • Acid-base dual-response hollow mesoporous silica composite nano container, self-repairing anticorrosive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Preparation of ZIF-8 self-sacrificing template:

[0037] Dissolve zinc nitrate hexahydrate in 100mL methanol to form solution A, the concentration of zinc nitrate is 42mM; weigh 2-methylimidazole and dissolve it in 100mL methanol to form solution B, the concentration of 2-methylimidazole is 0.65M. Pour solution B into solution A, and stir the mixed solution vigorously for 3h at a stirring speed of 3000rpm / min. Wash by centrifugation, wash with methanol three times, and dry overnight at 60° C. to obtain ZIF-8 nanoparticles.

[0038] 2. Preparation of hollow mesoporous silica spherical core:

[0039] Prepare 400mL of a mixed solution of water and absolute ethanol, the volume ratio of water and absolute ethanol is 5:4, add 2-methylimidazole, and control the concentration of 2-methylimidazole to 62mM. The ZIF-8 nanoparticles obtained through the above steps were ultrasonically dispersed in a mixed solution composed of water, absolute ethanol and 2-methylimidazole for 3...

Embodiment 2

[0045] 1. Preparation of ZIF-8 self-sacrificing template:

[0046] Dissolve zinc nitrate hexahydrate in 100mL methanol to form solution A, the concentration of zinc nitrate is 50mM; weigh 2-methylimidazole and dissolve it in 100mL methanol to form solution B, the concentration of 2-methylimidazole is 0.75M. Pour solution B into solution A, and stir the mixed solution vigorously for 3 h at a stirring speed of 3000 rpm / min. Wash by centrifugation, wash with methanol three times, and dry overnight at 60° C. to obtain ZIF-8 nanoparticles.

[0047] 2. Preparation of hollow mesoporous silica spherical core:

[0048] Prepare 400mL of a mixed solution of water and absolute ethanol, the volume ratio of water and absolute ethanol is 5:4, add 2-methylimidazole, and control the concentration of 2-methylimidazole to 70mM. The ZIF-8 nanoparticles obtained through the above steps were ultrasonically dispersed in a mixed solution composed of water, absolute ethanol and 2-methylimidazole for...

Embodiment 3

[0054] 1. Preparation of ZIF-8 self-sacrificing template:

[0055] Dissolve zinc nitrate hexahydrate in 100mL methanol to form solution A, the concentration of zinc nitrate is 42mM; weigh 2-methylimidazole and dissolve it in 100mL methanol to form solution B, the concentration of 2-methylimidazole is 0.65M. Pour solution B into solution A, and stir the mixed solution vigorously for 3 h at a stirring speed of 3000 rpm / min. Wash by centrifugation, wash with methanol three times, and dry overnight at 60° C. to obtain ZIF-8 nanoparticles.

[0056] 2. Preparation of hollow mesoporous silica spherical core:

[0057] Prepare 600mL of a mixed solution of water and absolute ethanol, the volume ratio of water and absolute ethanol is 5:4, add 2-methylimidazole, and control the concentration of 2-methylimidazole to 62mM. The ZIF-8 nanoparticles obtained through the above steps were ultrasonically dispersed in a mixed solution composed of water, absolute ethanol and 2-methylimidazole for...

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PUM

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Abstract

The invention discloses an acid-base dual-response hollow mesoporous silica composite nano container. The nano container comprises a hollow mesoporous silica sphere core, a corrosion inhibitor and a ZIF-8 nano valve, the corrosion inhibitor is loaded in the hollow mesoporous silica sphere core, and the ZIF-8 nanometer valve coats the outer surface of the hollow mesoporous silicon dioxide sphere core. The invention also discloses self-repairing anticorrosive paint and a preparation method thereof, the hollow mesoporous silica nano-container has acid-base dual response-release functions, the compatibility and dispersibility of the nano container in a coating can be effectively improved, and the performance of the coating is prevented from being damaged by agglomeration of the nano container.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a hollow mesoporous silica composite nano-container with double acid-base response, a self-repairing anti-corrosion coating and a preparation method thereof. Background technique [0002] Metal materials are widely used in various fields of the national economy due to their good physical and chemical properties and performance, but they inevitably suffer from various damages during service, such as fracture, wear, natural aging and corrosion. Among them, corrosion is the most serious damage to metal materials. Corrosion is a common technical problem faced by all countries in the world. The economic loss caused by metal corrosion in my country is as high as 4% of GDP every year. hazards to safety. [0003] There are many ways to prevent metal corrosion, such as corrosion inhibitor protection, anti-corrosion coating protection, electrochemical protection, etc. Among them, org...

Claims

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Application Information

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IPC IPC(8): C09C1/30C09C3/10C09D5/08C09D163/00
CPCC08K2201/011C09C1/3072C09C3/10C09D5/08C09D163/00C08K9/10C08K7/26
Inventor 刘娅莉周城良罗小虎李钊李季陈博袁天赐吴倩吴涛
Owner HUNAN UNIV
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