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Corrosion inhibitor-loaded pH response type silicon dioxide nano-container composite silane film and preparation and application thereof

A technology of silica and nano-containers, which is applied in coatings, anti-corrosion coatings, metal material coating processes, etc., can solve the problem that the coating cannot achieve shielding effect, and achieve simple design, easy operation, and low pollution Effect

Inactive Publication Date: 2021-09-03
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large number of studies have shown that the coating always has a certain degree of air permeability and water permeability. The speed of water penetration and oxygen penetration of the coating is often higher than the speed of corrosion consumption of water and oxygen on the exposed steel surface. The coating cannot achieve a complete shielding effect.

Method used

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  • Corrosion inhibitor-loaded pH response type silicon dioxide nano-container composite silane film and preparation and application thereof
  • Corrosion inhibitor-loaded pH response type silicon dioxide nano-container composite silane film and preparation and application thereof
  • Corrosion inhibitor-loaded pH response type silicon dioxide nano-container composite silane film and preparation and application thereof

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Experimental program
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Embodiment 1

[0046] Such as figure 1 As shown, it is a TEM image of silica nano-micro-containers, and the size distribution is between 200 and 400nm:

[0047] The above-mentioned silicon dioxide nano-micro container is synthesized by a method based on the sol-gel method, and well-dispersed silicon dioxide microspheres are obtained by a method with simple process and low cost. The specific process is: 20mL of deionized water, 2mL of 28% concentrated ammonia water, and 75mL of ethanol were vigorously stirred for 30min, then 3mL of TEOS was added, and stirred for 8h to obtain silica nanoparticles. figure 1 a is its TEM image.

[0048] Disperse 1 g of silica nanoparticles in 0.42 mL of Brij30 (and 0.42 mL of deionized water in 200 mL of ethanol solution, and stir the mixture for 1 h. Add 2.5 mL of zirconium butoxide dropwise to the mixture, stir for 12 h, and collect the synthesized by centrifugation. Solid (sSiO 2 @sZrO 2 ), washed with deionized water, and then the solid (sSiO 2 @sZrO ...

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Abstract

The invention relates to a corrosion inhibitor-loaded pH response type silicon dioxide nano-container composite silane film and preparation and application thereof.The preparation method comprises the following steps: firstly, mixing hexadecyl trimethyl ammonium bromide, deionized water, ethyl alcohol, tetraethoxysilane and ammonia water to obtain silicon dioxide nano-particles; treating the particles by using polyoxyethylene lauryl ether, zirconium butoxide, polyvinylpyrrolidone and sodium hydroxide to obtain nanoparticles with modified surfaces; mixing the dispersed powder with a 2-mercaptobenzothiazole solution, and repeatedly vacuumizing by using a vacuum pump to obtain particles loaded with the corrosion inhibitor; and adding the obtained product into a mixed solution of BTSE and KH-560 to obtain the corrosion inhibitor-loaded pH response type silicon dioxide nano-container composite silane film. Compared with a single silane film, the hybrid film with a nano-container shows higher long-term corrosion resistance and can be applied to corrosion protection of various metals.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a pH-responsive silicon dioxide nano-container composite silane film loaded with a corrosion inhibitor and its preparation and application. Background technique [0002] Corrosion has been an extremely important problem that humans have tried to solve since the use of metal objects. The corrosion degradation process of materials is not only very complex, but also of great economic significance. Aluminum alloy AA2024, for example, is resistant to general corrosion due to the formation of a natural, inert oxide layer. However, it is prone to localized pitting, which can have devastating consequences for the structural integrity of the alloy. At present, its corrosion protection is achieved by deposition pretreatment and so on. The most effective corrosion inhibition relies on hexavalent chromium compounds contained in the protective coating. However, the toxicity and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D5/08C08G77/14C23C26/00C23F11/16
CPCC09D4/00C09D183/06C09D5/08C23F11/165C23C26/00C23C2222/20C08G77/14
Inventor 蒋继波李雨露孙冉黄星丛海山王云云许文秀李明晶陈晓敏周少博唐佳斌韩生
Owner SHANGHAI INST OF TECH
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