Transparent super-hydrophobic spraying agent, and preparation method and application thereof

A super-hydrophobic and transparent technology, applied in the direction of coating, etc., can solve the problems of difficult decomposition, great harm, unfavorable civilian production, etc., and achieve the effect of good hydrophobic performance, convenient use, and high visible light transmittance

Active Publication Date: 2015-11-11
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the modifier perfluorosilane used in this method is not easy to decompose in the natural environment, so it is very harmful to the environment, and the price of perfluorosilane is expensive, which is not conducive to civilian production

Method used

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  • Transparent super-hydrophobic spraying agent, and preparation method and application thereof
  • Transparent super-hydrophobic spraying agent, and preparation method and application thereof
  • Transparent super-hydrophobic spraying agent, and preparation method and application thereof

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preparation example Construction

[0019] The second aspect of the present invention provides a kind of preparation method of transparent superhydrophobic spray, it comprises the following steps:

[0020] (1) Preparation of sol: provide tetraethyl orthosilicate solution A and alkaline solution B, mix to obtain mixed solution C, add acidic solution, adjust PH to 1~3, and react to obtain silica sol with a solid content of 5- 30% silica sol;

[0021] (2) Preparation of gel: adding alkaline solution B to the silica sol obtained in step (1) to make its pH value 8-10 to obtain transparent silica gel;

[0022] (3) Modification of the gel: Mix the modifier with the dispersion medium to obtain the mixed solution D, and add the mixed solution D to the silica gel obtained in step (2), and react at 30-80°C for 1-24h , to obtain an alkylated silica gel;

[0023] (4) Dispersion of the gel and preparation of the spray: add a dispersion medium to the alkylated silica gel obtained in step (3), wash and disperse to obtain a di...

Embodiment 1

[0033] (1) Mix 4.7g ethyl orthosilicate and 7.9g methanol uniformly to obtain mixed solution A; mix 7.5g 0.02mol / L ammonia water and 7.9g ethanol uniformly to obtain mixed solution B. Mix mixed solution A and mixed solution B evenly to obtain mixed solution C. Add 3.5 g of 0.1 mol / L hydrochloric acid to the mixed solution C, and then ultrasonicate at 50 Hz for 2 hours to obtain a sol precursor, and the silicon dioxide content of ethyl orthosilicate is 28%;

[0034] (2) adding ammonia water with a mass fraction of 25%-28% to the sol precursor under the condition of high-speed stirring, so that the pH value is 8-10, and a transparent gel precursor is obtained;

[0035] (3) Mix 8 g of triethylchlorosilane and 48.5 g of n-hexane evenly to obtain a mixed liquid D. Add the mixed solution D to the gel precursor and react at 60°C for 16 hours to obtain an alkylated silica gel;

[0036](4) washing the alkylated silica gel with n-hexane and n-propanol, adding 20 g of n-propanol to the...

Embodiment 2

[0042] (1) Mix 4.7g ethyl orthosilicate and 7.9g ethanol uniformly to obtain mixed solution A; mix 7.5g 0.02mol / L ammonia water and 7.9g ethanol uniformly to obtain mixed solution B. Mix mixed solution A and mixed solution B evenly to obtain mixed solution C. Add 3.5 g of 0.1 mol / L hydrochloric acid to the mixed solution C, and then ultrasonicate at 50 Hz for 2 hours to obtain a sol precursor, and the silicon dioxide content of ethyl orthosilicate is 28%;

[0043] (2) adding ammonia water with a mass fraction of 25%-28% to the sol precursor under the condition of high-speed stirring, so that the pH value is 8-10, and a transparent gel precursor is obtained;

[0044] (3) Mix 6.5 g of trimethylchlorosilane and 48.5 g of n-hexane evenly to obtain a mixed liquid D. Add the mixed solution D to the gel precursor and react at 60°C for 16 hours to obtain an alkylated silica gel;

[0045] (4) washing the alkylated silica gel with n-hexane and n-propanol, adding 20 g of n-propanol to ...

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Abstract

The invention provides a transparent super-hydrophobic spraying agent, and a preparation method and an application thereof. The transparent super-hydrophobic spraying agent is colorless and is in a liquid state at room temperature. A layer of super-hydrophobic film can be formed on a substrate surface via spraying the agent, wherein the transparent super-hydrophobic film formed from the transparent super-hydrophobic spraying agent has a contact angle less than 150 degrees, a rolling angle less than 10 degrees, and a 550nm light transmission rate of 90-99% at a visible light area. The transparent super-hydrophobic spraying agent provided in the invention is convenient to use and can be widely applicable to hydrophobic treatment of ceramic, glass, paper, wood, stone, metal, or polymer surfaces.

Description

technical field [0001] The invention relates to a transparent superhydrophobic film material, in particular to a transparent superhydrophobic spray and its preparation method and application. Background technique [0002] Transparent superhydrophobic film is a new type of film material developed after superhydrophobic coating. It has the characteristics of transparency and super-hydrophobicity, and has great application potential in microfluidics, anti-fouling, anti-corrosion, oil-water separation, etc. Its transparent and super-hydrophobic properties are used in fields such as solar panel self-cleaning, fabric antifouling, bridge anticorrosion, and oil pollution treatment. It can be seen that the transparent superhydrophobic film material will show its important application value in various fields with its excellent performance in the future. [0003] Typical superhydrophobic films are generally divided into three categories according to transparency: one is called opaque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12
Inventor 董兵海范迪飞王世敏郭志光李静赵丽刘维民
Owner HUBEI UNIV
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