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A kind of long-acting superhydrophilic polysilazane coating and preparation method thereof

A polysilazane, super-hydrophilic technology, used in coatings, antifouling/underwater coatings, devices for coating liquids on surfaces, etc., can solve problems such as the disappearance of super-hydrophilic properties

Active Publication Date: 2021-04-06
GUANGZHOU WINHIGH CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on titanium dioxide (TiO 2 ) The superhydrophilic properties of thin film coatings are highly dependent on UV irradiation, and their superhydrophilic properties quickly disappear after a period of storage in the dark

Method used

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  • A kind of long-acting superhydrophilic polysilazane coating and preparation method thereof
  • A kind of long-acting superhydrophilic polysilazane coating and preparation method thereof
  • A kind of long-acting superhydrophilic polysilazane coating and preparation method thereof

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preparation example Construction

[0021] The preparation method of the long-acting super-hydrophilic polysilazane coating provided by the present invention comprises the following steps:

[0022] A polysilazane solution is coated on the surface of the substrate, and then photocuring or photothermal combined curing is performed to form a polysilazane coating, and then a surface treatment solution is coated on the surface of the polysilazane coating, and then the The substrate is heat treated.

[0023] The preparation process of the long-acting super-hydrophilic polysilazane coating of the present invention is as follows: first, a super-hydrophilic polysilazane solution is coated on the surface of the substrate, cured, and then used containing a coupling agent and a surface active agent. The surface treatment solution of the agent is grafted and cross-linked on the surface of the polysilazane, and then heat treated to maintain its long-term hydrophilicity, thereby obtaining a super-hydrophilic polysilazane coati...

Embodiment 1

[0061] The long-lasting superhydrophilic polysilazane coating on the tinplate in this example was prepared by the following method:

[0062] The formula of polysilazane solution is as follows: 10 parts of polysilazane, 89 parts of butyl acetate, 1 part of zinc oxide, 70.05 parts of dispersant S-210, catalyst 4,4'-trimethylenebis(1-methylpiperidine) ) 0.05 part, photoinitiator 1173 0.05 part.

[0063] The formula of the surface treatment solution is as follows: 5 parts of betaine, 95 parts of water, 1 part of citric acid, and 0.5 part of coupling agent KH570.

[0064] The polysilazane solution was spray-coated on the cleaned and dried tinplate substrate, baked in an oven at 100°C for 5 minutes, the solvent was removed, and then cured by light and heat for 10 minutes; then the cured tinplate was immersed in The surface treatment solution is placed in the surface treatment solution for 10 minutes, then taken out and placed in an oven to continue to bake and solidify to obtain a ...

Embodiment 2

[0068] The long-lasting superhydrophilic polysilazane coating on the glass in this example was prepared by the following method:

[0069] The formula of polysilazane solution is as follows: 10 parts of polysilazane, 89 parts of xylene, 1 part of titanium dioxide, 70.05 parts of dispersant S-210, catalyst 1,8-diazabicyclo[5.4.0]-7-undecane 0.05 part of carbene, 0.05 part of photoinitiator 184.

[0070] The formula of the surface treatment mixed solution is as follows: 3 parts of tartrate, 5 parts of disodium trihydroxysilicopropionate, 92 parts of water, 1 part of citric acid, and 0.5 part of coupling agent X-12-1135.

[0071] The polysilazane solution was spray-coated on the cleaned and dried glass substrate, baked in an oven at 100°C for 5 minutes to remove most of the solvent, and then cured by light for 10 minutes; then the surface treatment solution was coated on the cured glass substrate. The glass was dried in an oven to obtain a superhydrophilic glass. After rinsing a...

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Abstract

The invention relates to a long-acting superhydrophilic polysilazane coating and a preparation method thereof. The preparation method is: coating the polysilazane solution on the surface of the substrate, then performing photocuring or photothermal curing to form a polysilazane coating, and then using a surface treatment solution to treat the polysilazane coating. The surface is coated or impregnated, followed by heat treatment. The contact angle between the water droplets and the surface of the coating obtained in the present invention is less than 5°, and it is in the form of spreading and attaching, and it is easy to penetrate into the bottom of dirt and oil stains to float and wash away, thereby achieving a self-cleaning effect and having good mechanical and chemical properties. stability. The coating involved in the invention has self-cleaning and anti-fog functions, and has broad application prospects in construction, kitchen appliances, solar panels, outdoor cultural relics, and the like.

Description

technical field [0001] The invention relates to the technical field of coating materials, in particular, to a long-acting superhydrophilic polysilazane coating and a preparation method thereof. Background technique [0002] According to the degree of infiltration of water on the solid surface, the solid can be divided into hydrophobicity and hydrophilicity, usually we call the surface with the contact angle with water less than 5° as the superhydrophilic surface. The water spreads rapidly on the superhydrophilic surface to form a continuous water film, which helps to separate the dirt on the surface and realize the self-cleaning of the surface, because the surface does not form water droplets that cause light scattering, the superhydrophilic surface can be used for Prepare an anti-fog coating. Super-hydrophilic, self-cleaning anti-fog coatings have great application potential in building curtain walls, electronics, kitchen appliances, home improvement, automobiles, solar pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/24B05D5/00B05D3/06B05D3/02C09D183/16C09D5/16
CPCB05D3/0254B05D3/067B05D5/00B05D7/24B05D2518/12C09D5/1675C09D183/16
Inventor 王元兵艾娇艳黎沛彬
Owner GUANGZHOU WINHIGH CHEM TECH CO LTD
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