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Long-acting super-hydrophilic 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: 2018-11-30
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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  • Long-acting super-hydrophilic polysilazane coating and preparation method thereof
  • Long-acting super-hydrophilic polysilazane coating and preparation method thereof
  • Long-acting super-hydrophilic polysilazane coating and preparation method thereof

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preparation example Construction

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

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

[0023] The preparation process of the long-acting superhydrophilic polysilazane coating of the present invention is as follows: firstly, a superhydrophilic polysilazane solution is coated on the surface of the substrate, cured, and then used to contain a coupling agent and a surface active 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 coating.

[0024] ...

Embodiment 1

[0061] The long-acting superhydrophilic polysilazane coating on the tinplate in the present embodiment is 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, 0.05 parts of dispersant S-2107, 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 is spray-coated on the cleaned and dried tinplate substrate, baked in an oven at 100°C for 5 minutes, the solvent is removed, and then cured by photothermal coupling for 10 minutes; then the cured tinplate is dipped in Put it in the surface treatment solution for 10 minutes, take it out and place it in an oven to continue baking and solidification to obtain super-hydrophilic tinpl...

Embodiment 2

[0068] The long-acting superhydrophilic polysilazane coating on the glass in this embodiment is 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, 0.05 parts of dispersant S-2107, catalyst 1,8-diazabicyclo[5.4.0]-7-undeca 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 trihydroxysilylpropionate, 92 parts of water, 1 part of citric acid, and 0.5 part of coupling agent X-12-1135.

[0071] The polysilazane solution is sprayed 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 apply the surface treatment solution on the cured In the glass, put it in an oven and dry to obtain superhydrophilic glass. After washing and wiping with water fo...

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Abstract

The invention relates to a long-acting super-hydrophilic polysilazane coating and a preparation method thereof. The preparation method comprises the following steps of: coating a polysilazane solutionon the surface of a base material; performing photocuring or photo-thermal curing to form a polysilazane coating; and coating or soaking the surface of the polysilazane coating by a surface treatingsolution, and then, performing thermal treatment. The obtained coating has a contact angle smaller than 5 degrees between a water drop and the surface, is in a spreading-out and adhering state, and easily penetrates into the bottom of dirt or the oil strain for floating and washing away the dirt and the oil strain, so that the self-cleaning effect is achieved, and mechanical and chemical stabilityis good. The coating disclosed by the invention has a self-cleaning function and an anti-fog function, and has a wide application prospect in aspects of buildings, kitchen appliances, solar cell 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, solids can be divided into hydrophobic and hydrophilic. Usually, we call the surface with a contact angle of less than 5° with water as a superhydrophilic surface. Water spreads rapidly on the super-hydrophilic 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 there are no water droplets that cause light scattering on the surface, the super-hydrophilic surface can be used for Prepare an anti-fog coating. Super-hydrophilic, self-cleaning anti-fog coatings have great application potential in the fields of building curtain walls, electronics, kitchen appliances, home improvement, automobiles, and ...

Claims

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Application Information

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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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