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A method for preparing superhydrophobic films using pore-forming and reinforcing effects of polymerizable organic molecules

A technology of enhancement and organic molecules, which is applied in the direction of surface coating liquid devices, coatings, pretreatment surfaces, etc., can solve problems such as obstruction and poor mechanical properties, and achieve good transparency, good light transmittance, The effect of enhanced mechanical properties

Active Publication Date: 2020-05-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to realize the real application of superhydrophobic surface, there is still a big obstacle: the mechanical properties of superhydrophobic surface
In order to realize the application of superhydrophobic surface, it is necessary to ensure that the anti-friction and anti-scratch properties meet the practical standards and cannot be easily damaged. At present, most of the methods used are to use adhesives to enhance the adhesion of the surface, but the adhesive The presence of additives will affect the hydrophobic properties of micro-nano structures. At the same time, it is difficult to synthesize uniform and continuous films by directly spraying nanoparticles, and the mechanical properties are very poor. Therefore, finding a more convenient and effective way to enhance the application of super-hydrophobic surfaces is of far-reaching significance.

Method used

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  • A method for preparing superhydrophobic films using pore-forming and reinforcing effects of polymerizable organic molecules
  • A method for preparing superhydrophobic films using pore-forming and reinforcing effects of polymerizable organic molecules
  • A method for preparing superhydrophobic films using pore-forming and reinforcing effects of polymerizable organic molecules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of superhydrophobic film is prepared by the following method:

[0053] (1) Prepare the glass substrate: first cut the soda-lime glass into the size required for the experiment (2.5cm x 2.5cm), then soak it in ethanol, and ultrasonically clean it for 20 minutes, then dry it with a nitrogen gun to obtain the glass used in the experiment base;

[0054] (2) Preparation of silica sol: Using TEOS hydrolysis method, add water, ethanol, tetraethyl orthosilicate and ammonia water with a volume ratio of 50:60:5:1 into a glass bottle, stir at room temperature 400r / min for 24 Hour, obtain silica sol;

[0055] (3) Preparation of polyfurfuryl alcohol balls: Take furfuryl alcohol, polyvinylpyrrolidone and water with a molar ratio of 0.5:0.0025:200, add them to a flask, stir and react in an oil bath at 160°C at 600r / min for 12 hours, and put the reacted solution at a speed of 9500r / min Centrifuge for 20 minutes, wash the reddish-brown solid with water three times, take 0.5675 ...

Embodiment 2

[0061] A kind of superhydrophobic film is prepared by the following method:

[0062] (1) prepare glass substrate: with embodiment 1;

[0063] (2) preparation of silica sol: with embodiment 1;

[0064] (3) prepare polyfurfuryl alcohol ball: with embodiment 1;

[0065] (4) Spray the pre-film-forming mixture on the heated glass substrate: heat the glass substrate to 220°C, mix and shake the silica sol and polyfurfuryl alcohol ball dispersion with a volume ratio of 1:0.5, and use a spray gun to spray on the On the glass substrate, the spraying time is 30 seconds, and the air pressure of the spray gun is 2MPa;

[0066] (5) Carry out heat treatment to sprayed substrate: same as embodiment 1;

[0067] (6) Carry out low surface energy treatment to the substrate after heat treatment: same as embodiment 1.

[0068] The hydrophobic performance test of the hydrophobic film prepared in this example was carried out. 5 μL of water droplets were dropped on the surface of the prepared hydr...

Embodiment 3

[0070] A kind of superhydrophobic film is prepared by the following method:

[0071] (1) prepare glass substrate: with embodiment 1;

[0072] (2) preparation of silica sol: with embodiment 1;

[0073] (3) prepare polyfurfuryl alcohol ball: with embodiment 1;

[0074] (4) Spray the pre-film-forming mixture on the heated glass substrate: heat the glass substrate to 220°C, mix and shake the silica sol and polyfurfuryl alcohol ball dispersion with a volume ratio of 1:1, and spray it on the glass with a spray gun On the substrate, the spraying time is 30 seconds, and the air pressure of the spray gun is 2MPa;

[0075] (5) Carry out heat treatment to sprayed substrate: same as embodiment 1;

[0076] (6) Carry out low surface energy treatment to the substrate after heat treatment: same as embodiment 1.

[0077] The hydrophobic performance test of the hydrophobic film prepared in this example was carried out. 5 μL of water droplets were dropped on the surface of the prepared hydro...

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Abstract

The present invention belongs to the field of super-hydrophobicity and coatings, and particularly relates to a method for preparing a super-hydrophobic film by utilizing the effects of pore forming and enhancing of a polymerizable organic molecule. The method specifically comprises: preparing a silica sol and a poly(furfuryl alcohol) ball dispersion liquid, and mixing the silica sol and the poly(furfuryl alcohol) ball dispersion liquid to obtain a pre-film forming mixing liquid; spraying a heated substrate with the pre-film forming mixing liquid; carrying out heat treatment on the sprayed substrate to obtain a silica micro-nano structure; and carrying out low surface energy treatment to obtain the super-hydrophobic film. According to the present invention, the super-hydrophobic film is prepared by using the poly(furfuryl alcohol) to replace the commonly used adhesive and using the poly(furfuryl alcohol) ball as the pore-forming agent, such that the porous micro-nano structure is constructed, and the mechanical property of the super-hydrophobic surface is obviously enhanced; the used silica sol has good light transmittance, such that the prepared super-hydrophobic film has moderateroughness and good transparency; and the method has the simple operation, and is suitable for large-scale generation application.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic and coating preparation, and in particular relates to a method for preparing a superhydrophobic film by utilizing the pore-forming and reinforcing effects of polymerizable organic molecules. Background technique [0002] The liquid repellency of the material surface is a very important surface property, especially the surface with special wettability (such as superhydrophobicity, superamphiphobic, etc.), which plays a very important role in many practical applications. The surface chemical composition and surface morphology of a solid material determine its ability to be wetted by a liquid. The research on super anti-wetting surface materials has gained widespread attention of scientists. The definition of superhydrophobicity is that the static contact angle of the material surface to water is above 150°, and the rolling angle is below 10°. To achieve superhydrophobicity on the surface ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/65C09D183/04C08J9/24C08J7/12C08G65/36C03C17/23B05D1/02B05D3/00
Inventor 钟杰赵爽杰文敏黄福志程一兵
Owner WUHAN UNIV OF TECH