Preparation method of transparent super-hydrophobic zinc oxide coating

A zinc oxide, super-hydrophobic technology, applied in the field of functional coating preparation, can solve the problems of high cost, complex equipment, harsh reaction conditions, etc., and achieve the effects of low pollution, low cost and mild reaction conditions

Inactive Publication Date: 2015-01-07
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to solve the deficiencies in the current technology, provide a simple method for preparing a transparent superhydrophobic zinc oxide coating, and solve the problem of harsh reaction conditions, complicated equipment, and high cost in the preparation process of the current transparent superhydrophobic zinc oxide coating. Higher problem, the resulting zinc oxide coating has better transparency

Method used

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  • Preparation method of transparent super-hydrophobic zinc oxide coating
  • Preparation method of transparent super-hydrophobic zinc oxide coating
  • Preparation method of transparent super-hydrophobic zinc oxide coating

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Experimental program
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Embodiment 1

[0039] The preparation method of embodiment 1 transparent superhydrophobic zinc oxide coating, comprises the following steps:

[0040] a. Substrate pretreatment

[0041] Soak ordinary glass in hot Piranha solution (concentrated sulfuric acid: 30% hydrogen peroxide solution = 3:1, V / V), let it stand for 15 minutes, take it out and rinse it with plenty of water until the washing solution is neutral, then dry it ,spare.

[0042] b. Preparation of zinc oxide sol

[0043] Weigh 2.634g of zinc acetate dihydrate and 0.4374g of cetyltrimethylammonium bromide (CTAB) and dissolve them in 10mL of isopropanol, ultrasonically disperse them evenly for 5min, then slowly add 720μL of ethanolamine dropwise to make ethanolamine, acetic acid The molar ratio of zinc and surfactant was 1:1:0.1, and the reaction was stirred at 70°C for 2 hours to obtain a clear transparent sol with a concentration of 1.2mol / L.

[0044] c. Preparation of zinc oxide coating

[0045] The transparent sol was aged f...

Embodiment 2

[0052] The preparation method of embodiment 2 transparent superhydrophobic zinc oxide coatings, comprises the following steps:

[0053] a. Substrate pretreatment

[0054] Soak ordinary glass in hot Piranha solution (concentrated sulfuric acid: 30% hydrogen peroxide solution = 3:1, V / V), let it stand for 20 minutes, take it out and rinse it with plenty of water until the washing solution is neutral, then dry it ,spare.

[0055] b. Preparation of zinc oxide sol

[0056] Weigh 1.317g of zinc acetate dihydrate and 0.2187g of cetyltrimethylammonium bromide (CTAB) and dissolve them in 10mL of isopropanol, ultrasonically disperse them evenly for 5min, then slowly add 360μL of ethanolamine dropwise to make ethanolamine, acetic acid The molar concentration ratio of zinc and surfactant was 1:1:0.1, and reacted at 80°C for 1 h under stirring condition to obtain a clear transparent sol with a concentration of 0.6 mol / L.

[0057] c. Preparation of zinc oxide coating

[0058] The transp...

Embodiment 3

[0063] The preparation method of embodiment 3 transparent superhydrophobic zinc oxide coatings, comprises the following steps:

[0064] a. Substrate pretreatment

[0065] Soak the ITO glass in hot Piranha solution (concentrated sulfuric acid: 30% hydrogen peroxide solution = 3:1, V / V), let it stand for 30 minutes, take it out and rinse it with plenty of water until the washing solution is neutral, then dry it ,spare.

[0066] b. Preparation of zinc oxide sol

[0067] Weigh 3.512g of zinc acetate dihydrate and 0.583g of cetyltrimethylammonium bromide (CTAB) and dissolve them in 10mL of absolute ethanol, ultrasonically disperse them evenly for 5min, then slowly add 960μL of ethanolamine dropwise to make ethanolamine, acetic acid The molar concentration ratio of zinc and surfactant was 1:1:0.1, and the reaction was carried out at 70°C for 1 h under stirring condition to obtain a clear transparent sol with a concentration of 1.6 mol / L.

[0068] c. Preparation of zinc oxide coat...

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Abstract

The invention relates to a preparation method of a transparent super-hydrophobic zinc oxide coating on a glass substrate. The preparation method comprises the following steps of a, substrate pretreatment; b, zinc oxide solution preparation; c, zinc oxide coating preparation; and d, zinc oxide coating surface modification. Compared with the prior art, the preparation method has the beneficial effects of simple equipment process, low cost and mild reaction condition and is beneficial to large-scale industrial production. The transparent super-hydrophobic zinc oxide coating prepared by using the method has excellent hydrophobicity and transparency; the contact angle is larger than 160 degrees, the rolling angle is smaller than 8 degrees, and water drops can freely roll on the coating, so that the transparent super-hydrophobic zinc oxide coating has relatively good self-cleaning performance; and the light transmittance is approach to 90% which is close to that of blank glass, so that the transparent super-hydrophobic zinc oxide coating has favorable visible light transmittance. A surface modifier used in the preparation method is an alkyl silane coupling agent instead of a fluorinated compound, so that the cost is low, the environment pollution is relatively low, and the modified coating is relatively stable.

Description

technical field [0001] The invention belongs to the technical field of functional coating preparation, in particular to a method for preparing a transparent superhydrophobic zinc oxide coating on a glass substrate. Background technique [0002] A superhydrophobic surface refers to a surface with a water contact angle greater than 150° and a rolling angle less than 10°. The water drop is spherical on the surface, and the water drop can roll off the surface under its own gravity or a little external force. In recent years, superhydrophobic coatings have received increasing attention due to their wide application prospects. For example, super-hydrophobic coatings are used on outdoor antennas or satellite receiving antennas, which can avoid communication signal interruption caused by snow; when used on the surface of daily necessities, they can achieve antibacterial and self-cleaning effects; when used on ocean cruise ship shell coatings, they can Achieve anti-fouling and anti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23
CPCC03C17/25
Inventor 陈嵘杨浩张恋吕中
Owner WUHAN INSTITUTE OF TECHNOLOGY
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