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Acid-alkali dual response intelligent nano container based anti-corrosion coating preparation method and application

A technology of anti-corrosion coatings and nano-containers, which is applied in the preparation of metal anti-corrosion coatings, anti-corrosion coating preparation field based on acid-base double response smart nano-containers, which can solve the waste of corrosion inhibitors, anti-corrosion coatings do not have acid-base stimulation Response to problems such as controlled release to achieve the effect of extending service life and ensuring persistence

Inactive Publication Date: 2015-09-23
JIANGSU GUGELANSHAN PROTECTIVE FACILITIES CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-corrosion coating prepared above does not have the controllable release in response to acid-base stimuli, wastes corrosion inhibitors, and cannot form a durable, stable and effective protection for the metal surface.

Method used

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  • Acid-alkali dual response intelligent nano container based anti-corrosion coating preparation method and application
  • Acid-alkali dual response intelligent nano container based anti-corrosion coating preparation method and application
  • Acid-alkali dual response intelligent nano container based anti-corrosion coating preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, preparing hollow mesoporous silica microspheres.

[0035] 1. Drop 10mL polystyrene aqueous solution (8 wt%) into a mixture containing 0.8g cetyltrimethylammonium bromide (CTAB), 29mL deionized water, 15mL ethanol and 1mL concentrated ammonia water, at room temperature Stir for 15 min.

[0036] 2. Drop 1.38mL tetraethyl orthosilicate (TEOS) into the above mixture within 5min, react for 48h, centrifuge, wash with ethanol, and calcinate the obtained product in a muffle furnace at 550°C 8h.

[0037] 3. Reflux the calcined product in a mixture of 5mL concentrated hydrochloric acid and 100mL ethanol at 60°C for 5h, centrifuge, wash with methanol, and dry under vacuum at 60°C to obtain hollow mesoporous silica microspheres (HMSs).

[0038] Step 2, preparing an acid-base responsive smart nano container.

[0039]1. Disperse 100mg of hollow mesoporous silica microspheres in 15mL of anhydrous toluene, add 100mg of chloromethyltriethoxysilane (CMTES) dropwise under a nit...

Embodiment 2

[0048] Step 1, preparing hollow mesoporous silica microspheres.

[0049] 1. Drop 10mL polystyrene aqueous solution (8 wt%) into a mixture containing 1g cetyltrimethylammonium bromide (CTAB), 29mL deionized water, 15mL ethanol and 1mL concentrated ammonia water, at room temperature Stir for 15min.

[0050] 2. Drop 1.38mL tetraethyl tetrasilicate (TEOS) into the above mixture within 5min, react for 72h, centrifuge, wash with ethanol, and calcinate the obtained product in a muffle furnace at 500°C 6h.

[0051] 3. Reflux the calcined product in a mixture of 5mL concentrated hydrochloric acid and 50mL ethanol at 80°C for 6h, centrifuge, wash with methanol, and dry in vacuum at 60°C to obtain hollow mesoporous silica microspheres (HMSs).

[0052] Step 2, preparing an acid-base responsive smart nano container.

[0053] 1. Disperse 100mg of hollow mesoporous silica microspheres in 15mL of anhydrous toluene, add 120mg of chloromethyltriethoxysilane (CMTES) dropwise under a nitrogen ...

Embodiment 3

[0062] Step 1, preparing hollow mesoporous silica microspheres.

[0063] 1. Drop 10mL polystyrene aqueous solution (10 wt%) into a mixture containing 1g cetyltrimethylammonium bromide (CTAB), 29mL deionized water, 15mL ethanol and 1mL concentrated ammonia water, at room temperature Stir for 15min.

[0064] 2. Drop 1.38mL tetraethyl orthosilicate (TEOS) into the above mixture within 5min, react for 60h, centrifuge, wash with ethanol, and calcinate the obtained product in a muffle furnace at 530°C 7h.

[0065] 3. Reflux the calcined product in a mixture of 5mL concentrated hydrochloric acid and 100mL ethanol at 70°C for 5h, centrifuge, wash with methanol, and dry under vacuum at 60°C to obtain hollow mesoporous silica microspheres (HMSs).

[0066] Step 2, preparing an acid-base responsive smart nano container.

[0067] 1. Disperse 100mg of hollow mesoporous silica microspheres in 15mL of anhydrous toluene, add 80mg of chloromethyltriethoxysilane (CMTES) dropwise under a nitro...

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Abstract

The invention discloses an acid-alkali dual response intelligent nano container based anti-corrosion coating preparation method, and belongs to the field of metal corrosion prevention. The method comprises: firstly, preparing hollow mesoporous silicon dioxide microspheres; secondly, modifying the surface of the hollow mesoporous silicon dioxide microspheres to form intelligent nano containers capable of performing controllable releasing of corrosion inhibitor benzotriazole; and finally, dopping the hollow mesoporous silicon dioxide microspheres that package corrosion inhibitor benzotriazole into a nanoparticle collosol, and depositing the mixture on a metal surface to obtain an anti-corrosion coating. When the coating is damaged by an external stimulus, due to a local acid or alkali change of a corrosion microzone, valves of nearby intelligent nano containers are intelligently opened, benzotriazole molecules are released and are adsorbed on the metal surface to form a film, thereby repairing the coating. The invention further discloses application of the anti-corrosion coating, prepared by using the acid-alkali dual response intelligent nano container based anti-corrosion coating preparation method, in guardrails.

Description

technical field [0001] The invention relates to a preparation method of a metal anticorrosion coating, in particular to a preparation method and application of an anticorrosion coating based on an acid-base double-response intelligent nano container, which belongs to the field of metal corrosion protection. Background technique [0002] For a long time, the problem of metal corrosion has been one of the problems that need to be solved urgently in the world. Corrosion in a broad sense refers to the phenomenon that the chemical or electrochemical interaction between materials and the environment causes damage to the function of materials. Corrosion losses include direct losses and indirect losses. The direct economic losses caused by corrosion in countries around the world account for about 2%-4% of their gross national product every year. Therefore, it is imminent to apply science and technology to reduce the loss caused by corrosion. [0003] With the advancement of scienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/12C01B33/12
Inventor 傅佳骏朱发海王明东徐鹏
Owner JIANGSU GUGELANSHAN PROTECTIVE FACILITIES CO LTD
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