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High-binding-force super-hydrophobic coating and preparation method thereof

A technology of super-hydrophobic coating and binding force, which is applied in coatings, anti-corrosion coatings, and devices for coating liquid on the surface, etc. It can solve problems such as poor binding force of super-hydrophobic surfaces, and achieve low requirements for personnel and equipment and compactness Good, the effect of improving corrosion resistance

Inactive Publication Date: 2020-11-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a high-binding force super-hydrophobic coating and its preparation method, which solves the problem of poor binding force existing in the preparation of super-hydrophobic surfaces by the existing spray coating technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A magnesium alloy with a size of 50mm×50mm×5mm is used as the base material. The binder composition is configured according to the volume ratio of γ-glycidyl etheroxypropyltrimethoxysilane: distilled water: ethanol 3:1:8, and it is left to stand for 10 minutes. Hydrophobic coating preparation method: 2g / L of multi-walled carbon nanotubes with a diameter of 0-50nm, 1 g / L of silicon carbide powder with a diameter of 0.5-0.7μm, 40mL / L of tetraethyl silicate, hydrolysis of heptadecafluorodecyltrimethoxysilane solution 20mL / L, ethanol as solvent, ultrasonically dispersed for 0.5h and then stirred for 0.5h. Among them, the hydrolyzed solution of heptadecafluorodecyltrimethoxysilane is configured according to the volume ratio of heptadecafluorodecyltrimethoxysilane: distilled water: ethanol 1:1:98. The preparation process is as follows:

[0023] 1) Pretreatment: Polish the surface of the magnesium alloy with 200 ~ 1000# sandpaper, rinse and dry in turn with tap water and dis...

Embodiment 2

[0029] Aluminum alloy with a size of 20mm×40mm×10mm is used as the base material. The binder composition is configured according to the volume ratio of γ-glycidyl etheroxypropyltrimethoxysilane:distilled water:ethanol 2:1:9, and it is left to stand for 30 minutes. Hydrophobic coating preparation method: 2.5g / L of multi-walled carbon nanotubes with a diameter of 0-50nm, 3g / L of silicon carbide powder with a diameter of 0.5-0.7μm, 80mL / L of tetraethyl silicate, hydrolysis of heptadecafluorodecyltrimethoxysilane Solution 50mL / L, ethanol as solvent, ultrasonically dispersed for 0.5h and then stirred for 0.5h. Wherein the heptadecafluorodecyltrimethoxysilane hydrolyzate is configured according to the volume ratio of heptadecafluorodecyltrimethoxysilane: distilled water: ethanol 4:1:95. The preparation process is as follows:

[0030] (1) Pre-treatment: Polish the surface of the aluminum alloy with 200 ~ 1000# sandpaper, rinse and dry in turn with tap water and distilled water;

...

Embodiment 3

[0036] Aluminum alloy with a size of 20mm×40mm×10mm is used as the base material. The binder composition is configured according to the volume ratio of γ-glycidyl etheroxypropyltrimethoxysilane:distilled water:ethanol 2:1:9, and it is left to stand for 30 minutes. Hydrophobic coating preparation method: 3g / L of multi-walled carbon nanotubes with a diameter of 0-50nm, 4g / L of silicon carbide powder with a diameter of 0.5-0.7μm, 100mL / L of tetraethyl silicate, hydrolyzed solution of heptadecafluorodecyltrimethoxysilane 80mL / L, ethanol as solvent, ultrasonic dispersion for 60min. Wherein the heptadecafluorodecyltrimethoxysilane hydrolyzate is configured according to the volume ratio of heptadecafluorodecyltrimethoxysilane:distilled water:ethanol 20:1:79. The preparation process is as follows:

[0037] (1) Pre-treatment: Polish the surface of the aluminum alloy with 200 ~ 1000# sandpaper, rinse and dry in turn with tap water and distilled water;

[0038] (2) Spraying adhesive: ...

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PUM

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Abstract

The invention discloses a high-binding-force super-hydrophobic coating and a preparation method thereof. The high-binding-force super-hydrophobic coating comprises a binder and a hydrophobic coating.The preparation method mainly comprises binder spraying, hydrophobic coating spraying and heating curing treatment; and a metal matrix is adopted as an acceptor. The volume ratio of the raw materials,namely gamma-glycidyl ether oxypropyl trimethoxy silane to distilled water to ethanol of the binder is 2: 1: 9 to 4: 7: 9. The volume ratios of the raw materials of the hydrophobic coating are as follows: 1.5-3g / L of multiwalled carbon nanotubes; 1-4g / L of silicon carbide powder; 40-100mL / L of tetraethyl silicate; 20-80mL / L of heptadecafluorodecyltrimethoxysilane hydrolysate; and ethanol servingas a solvent. The binder adopted by the high-binding-force super-hydrophobic coating of the invention can form covalent bonds with the multi-walled carbon nanotubes and silicon carbide in the hydrophobic coating, and therefore, the binding force of the binder is high, the falling area of the binder, tested by a metal surface gridding method, is less than 5%, and the long-acting stability of a hydrophobic function can be ensured; and the multi-walled carbon nanotubes used in the high-binding-force super-hydrophobic coating of the invention can fill pores formed in a silane curing dehydration process, so the coating has good compactness, and the corrosion resistance of the coating can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a superhydrophobic coating with high binding force and a preparation method thereof. Background technique [0002] The superhydrophobic surface has unique wetting properties, and its applications in anti-icing, self-cleaning and anti-fouling, anti-corrosion, biomedicine, surface patterns, new transportation equipment, and oil-water separation are developing rapidly. So far, according to the construction of rough surface structure, its preparation methods are divided into: etching method, hydrothermal method, electrodeposition method, micro-arc oxidation method, spraying method and multiple method composites. [0003] The spraying method uses the principle of uniformly dispersing and superimposing micro / nano particle raw materials on the surface of the substrate by spraying equipment, and forms a uniform coating with a certain rough structure on the surface of the sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D5/08C09D7/61B05D7/16
CPCB05D7/16B05D2202/20B05D2202/25C09D4/00C09D5/08C09D7/61C08G77/18
Inventor 闫格张永君
Owner SOUTH CHINA UNIV OF TECH
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