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Composite coating with cilium structure and preparation method and application thereof

A technology of composite coating and cilia, which is applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems of environmental pollution, scale crystal adhesion on the surface, etc., and achieve the effect of good performance

Active Publication Date: 2017-09-08
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these coatings in the prior art may cause environmental pollution during production and use, and these coatings are mainly used for anti-scaling at room temperature, and the application of anti-scaling required in a hot water environment does not involve
[0004] At present, the anti-scaling function of domestic hot and cold water pipes is mainly realized by the low surface energy characteristics of the material of the water pipes, and no other anti-scaling coatings are applied. However, in fact, after testing, common PVC water pipes will be There are a lot of scale crystals adhered to the surface

Method used

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  • Composite coating with cilium structure and preparation method and application thereof
  • Composite coating with cilium structure and preparation method and application thereof
  • Composite coating with cilium structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] A porous alumina rod such as figure 1 The enlargement of the cross-section 2 of the alumina rod and the small hole on the outer surface of the alumina rod in image 3 As shown, its surface has honeycomb pores, and the preparation method is as follows:

[0080] 1) Connect the aluminum rod to the positive pole of the power supply as the anode, and connect the graphite to the negative pole of the power supply as the cathode. Immerse in a mixed solution of ethanol and perchloric acid with a volume ratio of 4:1 at 0°C, turn on the power, set the voltage to 15V, and electropolish for 20 minutes;

[0081] 2) Immerse the electropolished anode and cathode in step 1) in an oxalic acid solution with a concentration of 0.1mol / L at 0°C, turn on the power, set the voltage to 40V, and oxidize for 6h;

[0082] 3) Dip the oxidized aluminum rod in step 2) into a phosphoric acid solution with a mass concentration of 4 wt% at 30°C, and expand the holes for 10 minutes. After washing with...

Embodiment 2

[0085] A porous aluminum oxide rod, the preparation method is as follows:

[0086] 1) Connect the aluminum rod to the positive pole of the power supply as the anode, and connect the graphite to the negative pole of the power supply as the cathode. Immerse in a mixed solution of ethanol and perchloric acid with a volume ratio of 4:1 at 0°C, turn on the power, set the voltage to 15V, and electropolish for 20 minutes;

[0087] 2) Immerse the electropolished anode and cathode in step 1) in an oxalic acid solution with a concentration of 0.1mol / L at 0°C, turn on the power, set the voltage to 140V, and oxidize for 6 hours;

[0088] 3) Immerse the oxidized aluminum rod in step 2) in a phosphoric acid solution with a mass concentration of 4 wt% at 30°C, and expand the holes for 30 minutes. After washing with acetone and water, dry in a vacuum oven at 70°C for 6 hours to obtain a porous alumina rod.

[0089] The depth of the pores on the outer surface of the prepared alumina porous r...

Embodiment 3

[0091] A porous aluminum oxide rod, the preparation method is as follows:

[0092] 1) Connect the aluminum rod to the positive pole of the power supply as the anode, and connect the graphite to the negative pole of the power supply as the cathode. Immerse in a mixed solution of ethanol and perchloric acid with a volume ratio of 4:1 at 0°C, turn on the power, set the voltage to 15V, and electropolish for 20 minutes;

[0093] 2) Immerse the electropolished anode and cathode in step 1) in an oxalic acid solution with a concentration of 0.2 mol / L at 0°C, turn on the power, set the voltage to 200V, and oxidize for 3 hours;

[0094] 3) Dip the oxidized aluminum rod in step 2) into a phosphoric acid solution with a mass concentration of 4 wt% at 30°C, and expand the holes for 10 minutes. After washing with acetone and water, dry in a vacuum oven at 70°C for 6 hours to obtain a porous alumina rod.

[0095] The depth of the pores on the outer surface of the prepared alumina porous ro...

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Abstract

The invention discloses a composite coating with a cilium structure and a preparation method and an application thereof. The composite coating with the cilium structure comprises a bottom coating and a surface coating. The surface coating is applied to the bottom coating. The bottom coating and the surface coating are fixed by means of cross linking. The surface coating has the nano cilium structure. The preparation method comprises the following steps of: firstly, coating the surface of a substrate with the bottom coating; and then continuously rolling and embossing the surface coating on the coating through an aluminum oxide porous rod and curing and applying the surface coating to the bottom coating to obtain a water-scale-preventing coating product. According to the composite coating with the cilium structure, hydrophilcity of a hydrogel and the nano cilium structure generate a synergistic effect, so that the nucleating probability of mineral particles in water on the surface of the coating can be reduced, and adhesion to generated mineral microcrystals is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of scale-resistant coatings. More specifically, it relates to a composite coating with a cilia structure and its preparation method and application. Background technique [0002] In the process of life and production, scaling of hot and cold water pipelines is very common. Scale will shorten the service life of equipment, accelerate metal corrosion, and increase maintenance costs. In our country, the annual economic loss due to fouling reaches 100 million yuan. [0003] The formation of scale is actually insoluble or slightly soluble salt in water, which is easy to precipitate and deposit on the surface of the vessel wall. The formation process is as follows: the salt with low solubility in water forms microcrystals in the supersaturated state, and the crystals adhere to and gather on the surface of the vessel wall to form scale. Some nano-silica coatings have been applied in the field of anti-fouling. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/14C09D151/08C08F220/28C08F222/14C08F283/06C08F222/38C08F2/48C08F4/30C25D11/16C25D11/10C25D11/24
CPCC08F2/48C08F4/30C08F220/28C08F220/281C08F283/06C09D133/14C09D151/08C25D11/10C25D11/16C25D11/24C08F222/385C08F222/102
Inventor 王树涛张天展孟靖昕王岳峰
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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