Near-infrared quick-response precise self-repairing anticorrosive coating and preparation method thereof

A fast-response, anti-corrosion coating technology, used in anti-corrosion coatings, coatings, polyurea/polyurethane coatings, etc., can solve problems such as loss of repair effect, and achieve the effect of simple construction, overcoming self-repair times, and low cost

Active Publication Date: 2021-08-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this foreign-aid self-repairing material loses its repairing effect after a certain number of repairs, that is, after the repairing agent in the capsule is released.

Method used

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  • Near-infrared quick-response precise self-repairing anticorrosive coating and preparation method thereof
  • Near-infrared quick-response precise self-repairing anticorrosive coating and preparation method thereof
  • Near-infrared quick-response precise self-repairing anticorrosive coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for preparing a near-infrared rapid response and precise self-repairing anti-corrosion coating, comprising the following steps:

[0028] 1. Preparation method of furan-modified nanoparticles

[0029] Take by weighing 10g particle diameter and be 50nm CeO Nanoparticles are dispersed in 500mL molar mass concentration and be 10mM, pH is in the Tris-HCl buffer solution of 8.5, add 5g dopamine hydrochloride again, after stirring at high speed for 12 hours, centrifuge to separate out the nanoparticles, Disperse evenly with ethanol.

[0030] Place 15 g of the above-mentioned homogeneously dispersed dopamine-coated nanoparticle ethanol dispersion at 60 ° C, adjust the pH to 9 with triethylamine, add 20 g of furfuryl mercaptan dropwise, continue stirring for 24 hours, and centrifuge to separate the nanoparticles. Disperse evenly with butanone.

[0031] 2. Synthetic method of maleimide-terminated polyurethane

[0032] React 20.25g of isophorone diisocyanate and 24.75g...

Embodiment 2

[0036] A method for preparing a near-infrared rapid response and precise self-repairing anti-corrosion coating, comprising the following steps:

[0037] 1. Preparation of furan-modified nanoparticles

[0038] Take by weighing 10g particle diameter and be 50nm CeO Nanoparticles are dispersed in 500mL molar mass concentration and be 10mM, pH is in the Tris-HCl buffer solution of 8.5, add 5g dopamine hydrochloride again, after stirring at high speed for 12 hours, centrifuge to separate out the nanoparticles, Disperse evenly with ethanol.

[0039] Put 15g of the above uniformly dispersed dopamine-coated nanoparticles ethanol dispersion at 60°C, adjust the pH to 9 with triethylamine, add 20g of furfuryl mercaptan dropwise, continue stirring for 24 hours, and centrifuge to separate the nanoparticles. Disperse evenly with butanone.

[0040] 2. Synthetic method of maleimide-terminated polyurethane

[0041] React 20.25g of isophorone diisocyanate and 24.75g of polypropylene glycol a...

Embodiment 3

[0045] A method for preparing a near-infrared rapid response and precise self-repairing anti-corrosion coating, comprising the following steps:

[0046] 1. Preparation of furan-modified nanoparticles

[0047]Take by weighing 10g particle diameter and be 50nm CeO Nanoparticles are dispersed in 500mL molar mass concentration and be 10mM, pH is in the Tris-HCl buffer solution of 8.5, add 5g dopamine hydrochloride again, after stirring at high speed for 12 hours, centrifuge to separate out the nanoparticles, Disperse evenly with ethanol.

[0048] Place 15 g of the above-mentioned homogeneously dispersed dopamine-coated nanoparticle ethanol dispersion at 60 ° C, adjust the pH to 9 with triethylamine, add 20 g of furfuryl mercaptan dropwise, continue stirring for 24 hours, and centrifuge to separate the nanoparticles. Disperse evenly with butanone.

[0049] 2. Synthetic method of maleimide-terminated polyurethane

[0050] React 20.25g of isophorone diisocyanate and 24.75g of poly...

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Abstract

The invention provides a near-infrared rapid-response precise-self-repairing anticorrosive coating and a preparation method thereof. The near-infrared rapid-response precise-self-repairing anticorrosive coating comprises furan-modified nanoparticles and a maleimide-terminated polyurethane coating matrix, the furan-modified nanoparticles are CeO2 nanoparticles wrapped by dopamine, and furan groups are grafted on the surfaces of the CeO2 nanoparticles. The preparation method comprises the following steps: dispersing CeO2 nanoparticles in a Tris-HCl buffer solution, adding dopamine hydrochloride, carrying out high-speed stirring, carrying out centrifugal separation to obtain nanoparticles, and uniformly dispersing the nanoparticles with ethanol; and placing the uniformly dispersed dopamine-coated nanoparticle ethanol dispersion liquid at 60 DEG C, adjusting the pH value to about 9 by using triethylamine, dropwise adding furfuryl mercaptan, continuously stirring and reacting for 24 hours, centrifugally separating out nanoparticles, uniformly dispersing by using butanone, finally adding the nanoparticles into maleimide-terminated polyurethane, uniformly stirring and mixing, and drying to obtain the anticorrosive coating with the near-infrared quick response and precise self-repairing functions.

Description

technical field [0001] The invention relates to the technical field of self-repairing anti-corrosion coatings, in particular to a near-infrared rapid response and precise self-repairing anti-corrosion coating and a preparation method thereof. Background technique [0002] Due to their excellent physical and chemical properties, metal materials are widely used in military industry, deep sea, infrastructure and people's daily life. However, due to various unfavorable factors such as external forces and corrosive media during use, metals will inevitably be subject to wear and corrosion. At the same time, the corrosion behavior of metals is also a process in which Gibbs free energy decreases, which leads to metals being more prone to corrosion. According to statistics, 20% of the metal materials in the world cannot be recycled due to corrosion, resulting in a huge waste of metal resources, so the corrosion protection of metals has been generally valued. However, ordinary anti-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/08
CPCC09D175/08C09D5/08C08K2003/2213C08K2201/011C08K9/10C08K3/22
Inventor 王海波许峻槐成煦杜宗良杜晓声
Owner SICHUAN UNIV
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