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Super-smooth self-cleaning coating and preparation method thereof

An ultra-smooth and coating technology, applied in the direction of coating, etc., can solve the problems of unsuitability for on-site construction, poor practicability, and rising costs, and achieve the effects of convenient operation, enhanced stability, and good practicability

Active Publication Date: 2016-06-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The super-hydrophilic self-cleaning coating requires high-temperature calcination in the later stage, which is not suitable for on-site construction, nor is it suitable for the surface of organic materials, and organic alkoxides are mostly used as raw materials, which increases the cost and poor practicability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Under the protection of nitrogen, mix tetraethyl orthosilicate component A, silica sol component B, silane coupling agent component C, and solvent D uniformly at 20°C, add catalyst E drop by drop, and hydrolysis and condensation reaction 2 Hours, a sol-like organic-inorganic hybrid coating is obtained, wherein the mass ratio of components A, B, C, D, and E is 1:0.3:1.9:2.0:0.9.

[0033] The sol-like coating prepared above was sprayed onto the surface of a glass slide, and heat-treated at 100° C. for 1 hour to obtain an organic-inorganic hybrid coating. Then dip the coating into silicone oil F, remove excess silicone oil to get an ultra-smooth self-cleaning coating.

[0034] In this example, the silica sol component B is a silica ethanol sol with a pH=2, a solid content of 50%, and a particle size of 10 nm, and the silane coupling agent component C is methyltriethoxy Silane, dimethyldimethoxysilane, phenyltriethoxysilane composition; solvent D is ethanol; catalyst E is ...

Embodiment 2

[0038] Under the protection of nitrogen, mix tetraethyl orthosilicate component A, silica sol component B, silane coupling agent component C, and solvent D uniformly at 10°C, add catalyst E drop by drop, and hydrolysis and condensation reaction 1 Hours, a sol-like organic-inorganic hybrid coating was obtained, wherein the mass ratio of components A, B, C, D, and E was 1:0:6.8:4.0:2.8.

[0039] The sol-like coating prepared above was sprayed on the surface of the silicon chip, and heat-treated at 80° C. for 5 hours to obtain an organic-inorganic hybrid coating. Then soak the coating in silicone oil F to get an ultra-smooth self-cleaning coating soaked in silicone oil.

[0040] Silane coupling agent component C is methyltriethoxysilane, dimethyldimethoxysilane, phenyltriethoxysilane composition in the present embodiment; Solvent D is propanol; Catalyst E is concentration 10 %wt of acetic acid; silicone oil F is methyl silicone oil with a viscosity of 50mPa·s. The test data of ...

Embodiment 3

[0043]Under nitrogen protection, tetraethyl orthosilicate component A, silica sol component B, silane coupling agent component C, and solvent D were mixed uniformly at 40°C, catalyst E was added, and the hydrolysis and condensation reaction was carried out for 3 hours. An organic-inorganic hybrid coating material is obtained, wherein the mass ratio of components A, B, C, D, and E is 1:0:2.1:5.0:0.9.

[0044] Spray the above-prepared sol-like coating onto the surface of a glass slide, and heat-treat it at 120°C for 2 hours to obtain an organic-inorganic hybrid coating, and then soak the coating in silicone oil to obtain an ultra-smooth coating soaked in silicone oil .

[0045] Silane coupling agent component C is methyltriethoxysilane, dimethyldimethoxysilane, phenyltriethoxysilane composition in this example; Solvent D is methyl alcohol; Catalyst E is concentration 4%wt Sulfuric acid; lubricating oil F is 500mPa·s end epoxy silicone oil. The detection data of the ultra-smoot...

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Abstract

The invention discloses a super-smooth self-cleaning coating and a preparation method thereof. The preparation method of the coating includes the following steps that under protection of nitrogen gas, tetraethyl orthosilicate, silica sol, a silane coupling agent and solvent are mixed to be uniform, a catalyst is added, a hydrolytic condensation reaction is conducted for 1-5 hours at the temperature of 10-15 DEG C, a sol-shaped coating material is prepared, the coating material is sprayed on the surface of a base material, thermal treatment is conducted, and an organic-inorganic hybrid coating is obtained; the coating is soaked in silicone oil and then taken out to remove redundant silicone oil, and the super-smooth self-cleaning coating is obtained; the lag angle of a water drop on the coating is smaller than 5 degrees, anti-fouling self-cleaning performance is achieved, and the super-smooth self-cleaning coating can be used for the fields of ocean, dirt prevention of medical instruments, self-cleaning materials and the like. The super-smooth self-cleaning coating has the advantages of being transparent, good in stability, long in service life, simple in process, easy to operate and convenient to apply.

Description

technical field [0001] The invention relates to a method for preparing an ultra-smooth coating on the surface of a substrate, and belongs to the technical field of antifouling and self-cleaning coatings. Background technique [0002] There are many ways to prepare antifouling and self-cleaning coatings, and there are two different ways according to different principles: one is super-hydrophobic self-cleaning coating; the other is super-hydrophilic self-cleaning coating. Super-hydrophobic self-cleaning coating means that when water droplets fall on the surface of the material, the contact angle is greater than 150°. When the water droplets are easy to roll, they will take away the dust and sludge together to achieve the purpose of self-cleaning. Super-hydrophilic self-cleaning coating means that water droplets fall on the surface of the material, the contact angle of water droplets is less than 10°, and water forms a water film on the surface of the material. The surface of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D183/06C09D183/08C09D1/00C03C17/42
Inventor 张庆华韦存茜詹晓力陈丰秋
Owner ZHEJIANG UNIV
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