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Microcapsule-containing self-detection and self-repair intelligent coating and preparation method thereof

A smart coating and microcapsule technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems of imperfect self-detection function, limited loading of chromogenic molecules, lack of self-detection and self-repairing anti-corrosion coatings and other issues, to achieve good anti-corrosion effect, fill market vacancies, and low preparation cost

Inactive Publication Date: 2021-03-26
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology CN111334161A uses microcapsules to prepare self-repairing anti-corrosion coatings, and the prior art CN2020188416.6 uses a combination of metal-organic framework-microcapsules to prepare self-repairing microcapsules; however, the market lacks both self-testing and self-repairing functions. In the prior art CN201810256033.0, nanomaterials are used to load chromogenic molecules to give the anti-corrosion coating a self-detection function, but the loading of chromogenic molecules is limited, and the self-detection function is not perfect enough

Method used

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  • Microcapsule-containing self-detection and self-repair intelligent coating and preparation method thereof
  • Microcapsule-containing self-detection and self-repair intelligent coating and preparation method thereof
  • Microcapsule-containing self-detection and self-repair intelligent coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1, the mixture of the polylactic acid and the epoxy bisphenol A monomer and the crystalline purple endose is dissolved in chloroform to the chloroform.

[0034] Step 2, adding 2 mg / ml of a 2 mg / ml of a 2 mg / ml of dodecylbenzene sulfonate in volume ratio of 2: 1, and a uniform emulsion was obtained using a 12000 rpm / min high-speed shear machine.

[0035] Step three, the emulsion in step two is placed in a 40 ° C oil bath and stirred and stirred at 600 rpm / min for 12 hours to obtain a microcapsule aqueous solution, and the microcapsule is obtained, and the microcapsules are further dispersed in deionized water. Microcapsules suspension.

[0036] Step 4, mixing the microcapsules in step three, the silica nanoparticle, dispersant, and aqueous epoxy resin to obtain a coating having self-detection self-repairing function, wherein the total resin mass in the total solid mass of the coating is 79%, micro The percentage of capsule mass is 15%, and the hydroxy-modified...

Embodiment 2

[0039] Step 1, the mixture of the polylactic acid and the epoxy bisphenol A monomer and the crystalline purple endose is dissolved in chloroform to the chloroform.

[0040] Step 2, adding 2 mg / ml of a 2 mg / ml of a 2 mg / ml of dodecylbenzene sulfonate in volume ratio of 2: 1, and a uniform emulsion was obtained using a 12000 rpm / min high-speed shear machine.

[0041] Step three, the emulsion in step two is placed in a 40 ° C oil bath and stirred and stirred at 600 rpm / min for 12 hours to obtain a microcapsule aqueous solution, and the microcapsule is obtained, and the microcapsules are further dispersed in deionized water. Microcapsules suspension.

[0042] Step 4, mix the microcapsules, silica nanoparticles, dispersants, and waterborne epoxy resin in step three, and the coating having self-detection self-repairing function, wherein the total resin mass in the total solid mass of the coating is 74%, micro The mass percentage of the capsule is 20%, and the hydroxy-modified ...

Embodiment 3

[0045] Step 1, the mixture of the polylactic acid and the epoxy bisphenol A monomer and the crystalline purple endose is 1: 1 to the chloroform to obtain the first mixture in chloroform.

[0046] Step 2, adding 2 mg / ml of a 2 mg / ml of a 2 mg / ml of dodecylbenzene sulfonate in volume ratio of 2: 1, and a uniform emulsion was obtained using a 12000 rpm / min high-speed shear machine.

[0047] Step three, the emulsion in step two is placed in a 40 ° C oil bath and stirred and stirred at 600 rpm / min for 12 hours to obtain a microcapsule aqueous solution, and the microcapsule is obtained, and the microcapsules are further dispersed in deionized water. Microcapsules suspension.

[0048] Step 4, mixing the microcapsules in step three, the silica nanoparticle, dispersant, and aqueous epoxy resin to obtain a coating having self-detection self-repairing function, wherein the total resin mass in the total solid mass of the coating is 79%, micro The percentage of capsule mass is 15%, a...

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Abstract

The invention provides a microcapsule-containing self-detection and self-repair intelligent coating and a preparation method thereof. The coating comprises: a microcapsule loading self-detection and self-repair functional molecules, wherein the shell of the microcapsule is composed of a polymer shell; a chromogenic initiator; and a water-based resin as a film-forming substance, and other additivessuch as a corrosion inhibitor, a dispersing agent, a leveling agent, a thickener and the like. According to the invention, self-detection and self-repair microcapsules are discretely distributed in acoating taking polymer resin as a matrix; the self-detection and self-repair coating provided by the invention has the function of automatically detecting defects and micro-defects in the coating, and prompts the occurrence of the defects in a color development manner; the coating has the function of spontaneously repairing defects or micro-defects in the coating; and the coating can be used as acorrosion protection coating on the surfaces of metal materials such as bridges, buildings, automobiles and the like.

Description

Technical field [0001] The present invention relates to the field of coating, and more particularly to a self-detection self-repairing intelligent coating having a microcapsule and a preparation method thereof. Background technique [0002] The organic coating is a more common method of metal surface anti-corrosion method, and the coating with spontaneous corrosion warning functions and spontaneous repair functions is the direction of coating intelligent development. The organic coatings are inevitably affected by environmental factors during service, producing some cracks and microcracks. The spread of cracks accelerates the corrosion process, causing the coating to fail. After being damaged by organism, the wound color changes, and spontaneously repaired, the present invention proposes that when the crack or microcrack occurs, the color of the coating defect changes, gives a corrosion warning, while Spontaneous start-up the coating of the defective repair. Thus, effectively sup...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/63C09D7/62C09D7/65C09D5/08G01N21/78
CPCC09D163/00C09D7/63C09D7/62C09D7/65C09D5/08G01N21/78C08K2201/011C08L67/04C08K13/06C08K9/10C08K5/1515C08K5/18C08K3/36
Inventor 李静陶征林杨俊和
Owner UNIV OF SHANGHAI FOR SCI & TECH
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