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Superhydrophobic coating preparation method, coating prepared therethrough, and application of coating in production of highly-transparent superhydrophobic coating layer

A super-hydrophobic coating and coating technology, applied in the coating and other directions, can solve the problems of harsh experimental conditions, difficult mass production, complicated operation process, etc., and achieve the effects of low cost, strong adhesion and simple process

Active Publication Date: 2018-01-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the methods used by scientific researchers to prepare superhydrophobic coatings are generally plasma corrosion method, layer-by-layer superposition method, organic-inorganic hybrid method, etc., but these methods are relatively complicated in operation, and the experimental conditions are harsh, making it difficult to produce on a large scale.
There are also related researches on superhydrophobic nano-coatings in the prior art, such as Chinese patent CN201510970396.7, but the silicate ester is added in two steps in its preparation, the process is cumbersome, and the particle size of the obtained nano-coating is about 400nm, and it is made of The coating is an opaque coating

Method used

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  • Superhydrophobic coating preparation method, coating prepared therethrough, and application of coating in production of highly-transparent superhydrophobic coating layer
  • Superhydrophobic coating preparation method, coating prepared therethrough, and application of coating in production of highly-transparent superhydrophobic coating layer
  • Superhydrophobic coating preparation method, coating prepared therethrough, and application of coating in production of highly-transparent superhydrophobic coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add 60 mL of isopropanol, 6 mL of deionized water, and 6 mL of ammonia water into a clean three-neck flask, control the magnetic stirring speed at 120 rad / min to 180 rad / min, and stir at room temperature for 5 min.

[0033] (2) Add 0.2mL tetraethyl orthosilicate and 0.02mL of 3,3,4,4,5,5,6,6,7,7,8,8,9,9, 10,10,10-heptadecafluorodecyltrimethoxysilane, stirred for 24 hours, and the stirring speed was controlled at 180rad / min~240rad / min.

[0034] (3) After the reaction (2) is finished, take the suspension of (2) and spray or dip it on a clean glass sheet, and dry it in vacuum at 60°C for 5 minutes to obtain a transparent superhydrophobic coating. figure 1 It is the TEM image of the nanoparticle suspension obtained in (2), it can be seen that the particle diameters are all less than 100nm, and most of them are below 60nm.

Embodiment 2

[0036] (1) Add 80 mL of ethanol, 4 mL of deionized water, and 4 mL of hydrochloric acid into a clean three-neck flask, control the magnetic stirring speed at 120 rad / min to 180 rad / min, and stir at room temperature for 5 min.

[0037] (2) Add 1 mL of tetraethyl orthosilicate and 0.05 mL of 1H,1H,2H,2H-perfluoroheptadecanetrimethyloxysilane to (1) in turn, stir for 24 hours, and control the stirring speed at 180 rad / min~240rad / min.

[0038] (3) After the reaction (2), take the suspension of (2) and spray or dip it on a clean glass sheet, and dry it in vacuum at 60°C for 5 minutes to obtain a transparent superhydrophobic coating. figure 2 is the contact angle of a water droplet on the transparent superhydrophobic coating, which is 163°.

Embodiment 3

[0040] (1) Add 100 mL of methanol, 2 mL of deionized water, and 2 mL of sodium hydroxide into a clean three-neck flask, control the magnetic stirring speed at 120 rad / min to 180 rad / min, and stir at room temperature for 5 min.

[0041] (2) Add 0.5mL ethyl silicate and 0.03mL 1H,1H,2H,2H-perfluoroheptadecanetrimethyloxysilane to (1) sequentially, stir for 24 hours, and control the stirring speed at 180rad / min ~240rad / min.

[0042] (3) After the reaction (2), take the suspension of (2) and spray or dip it on a clean glass sheet, and dry it in vacuum at 60°C for 5 minutes to obtain a transparent superhydrophobic coating. image 3 UV-visible light analysis diagrams of glass coated with different water content (a pure glass; b water content 2mL; c 0mL; d 4mL), compared with pure glass, the visible light transmittance of b and c are above 90%, The visible light transmittance of d is also over 87%.

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Abstract

The invention discloses a superhydrophobic coating preparation method, a coating prepared therethrough, and an application of the coating in the production of a highly-transparent superhydrophobic coating layer. The superhydrophobic coating preparation method comprises the following steps: adding a certain volume of a solvent, a cosolvent and a catalyst into a container one time, stirring the added substances at a certain rotating speed for a period of time, adding a certain volume of silicate ester and fluorine-containing siloxane, and continuously reacting all above substances at room temperature for a certain period of time to obtain the coating. The superhydrophobic coating prepared in the invention can be sprayed, dip-spread or dip-coated on glass, sheet paper, steel or other different substrates, and the transmittance of the produced coating layer in a visible light range reaches 92% or more. Compared with coating layers in the prior art, the produced coating layer has the advantages of simple production method, low cost, and facilitation of large-scale industrial production, has multiple uses in window glass, skyscraper light curtains, mobile phone screens and computer screens, and has great commercial values.

Description

technical field [0001] The invention relates to a preparation method of a super-hydrophobic coating, the obtained coating and the application of preparing a highly transparent super-hydrophobic coating, belonging to the technical field of hydrophobic coatings. Background technique [0002] Inspired by the self-cleaning effect of the lotus leaf surface, more and more scientists use the principle of bionics to prepare superhydrophobic coatings. Superhydrophobic coatings have attracted extensive attention due to their excellent properties such as self-cleaning, anti-icing, and anti-fogging. However, whether the coating is transparent or not plays an important role in expanding the application range of superhydrophobic coatings. Transparent superhydrophobic coatings can have a wider range of applications, such as car windshields, mobile phone and computer screens, etc. The preparation of superhydrophobic coatings is generally prepared by combining the factors of roughness and ...

Claims

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Application Information

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IPC IPC(8): C09D1/00
Inventor 姜勇江鹏飞张川周旋
Owner SOUTHEAST UNIV
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