Preparation method of transparent mesoporous titanium dioxide hydrophobic/ultra-hydrophilic functional thin film

A technology of mesoporous titanium dioxide and titanium dioxide, applied in the direction of coating, etc., can solve the problem of less preparation methods, and achieve the effect of simple process, strong repeatable operation and strong wear resistance

Active Publication Date: 2016-08-31
益阳金陇电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accordingly, researchers have adopted a variety of methods to construct superhydrophobic surfaces, such as: sol-gel method, plasma etching method, chemical bath method, electrostatic spraying method, layer-by-layer adsorption method, etc., but can be used in large-scale Fewer preparation methods for application production

Method used

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  • Preparation method of transparent mesoporous titanium dioxide hydrophobic/ultra-hydrophilic functional thin film
  • Preparation method of transparent mesoporous titanium dioxide hydrophobic/ultra-hydrophilic functional thin film
  • Preparation method of transparent mesoporous titanium dioxide hydrophobic/ultra-hydrophilic functional thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1 CTATos-TiO 2 superhydrophilic film

[0069] 1) 8.00 g of butyl titanate was diluted in 40 g of ethylene glycol, and 1.21 g of acetylacetone was added as a stabilizer to prepare solution A;

[0070] 2.00g CTATos surfactant was dissolved in 35g ethylene glycol and 0.18g water to prepare solution B;

[0071] Under magnetic stirring, add B dropwise to A, and use concentrated nitric acid to adjust the pH of the mixture to 3;

[0072] Stirring was continued for 2 h at room temperature to obtain a stable sol, which was stored at room temperature.

[0073] 2) The above-mentioned sol was evenly sprayed on a smooth ceramic substrate by ultrasonic spraying method, slightly air-dried, and placed in a muffle furnace for calcination at 600°C for 2 hours to obtain a CTATos-TiO2 superhydrophilic film.

[0074] In this embodiment, the molar ratio of water / titanium in the sol is 0.43, and the molar ratio of alcohol / titanium is 51.

Embodiment 2

[0075] Embodiment 2 P123-TiO2 superhydrophilic film

[0076] 1) 8.00 g of butyl titanate was diluted in 35 g of ethanol, and 1.21 g of acetylacetone was added as a stabilizer to prepare solution A;

[0077] 1.70g P123 surfactant was dissolved in 30g ethanol and 0.43g water to prepare solution B;

[0078] Under magnetic stirring, add B dropwise to A, and use concentrated nitric acid to adjust the pH of the mixture to 4;

[0079] Stirring was continued for 2 h at room temperature to obtain a stable sol, which was stored at room temperature.

[0080] 2) Spray the above sol evenly on a smooth glass substrate by compressed air spray method, air-dry it slightly, and place it in a muffle furnace for calcination at 500°C for 2 hours to obtain P123-TiO 2 superhydrophilic film.

[0081] In this embodiment, the molar ratio of water / titanium in the sol is 1.02, and the molar ratio of alcohol / titanium is 60.

Embodiment 3

[0082] Example 3 CTAB-TiO 2 Hydrophobic film

[0083] 1) 8.00 g of butyl titanate was diluted in 40 g of n-butanol, and 1.21 g of acetylacetone was added as a stabilizer to prepare solution A;

[0084] 2.00g of CTAB surfactant was dissolved in 35g of n-butanol and 0.72g of water to obtain solution B;

[0085] Under magnetic stirring, add B dropwise to A, and use concentrated hydrochloric acid to adjust the pH of the mixture to 3;

[0086] Stirring was continued for 2 h at room temperature to obtain a stable sol, which was stored at room temperature.

[0087] 2) The above-mentioned sol was uniformly sprayed on a smooth ceramic substrate by compressed air spraying method, air-dried slightly, and placed in a muffle furnace for calcination at 600°C for 2 hours to obtain a CTAB-TiO2 hydrophobic film.

[0088] In this embodiment, the molar ratio of water / titanium in the sol is 1.70, and the molar ratio of alcohol / titanium is 43.

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Abstract

The invention relates to a preparation method of a transparent mesoporous titanium dioxide hydrophobic/ultra-hydrophilic functional thin film. The method includes the steps of: 1) preparation of a precursor sol: diluting titanate in an alcohol solution, adding a stabilizer acetylacetone to prepare a solution A, dissolving a surfactant in the alcohol solution or a mixture liquid of alcohol and water to prepare a solution B, dropwisely adding the solution B into the solution A to prepare a mixed solution, regulating the pH value of the mixed solution to 2-5 and stirring the mixed solution until stable sol is formed; 2) coating of the sol: spray-coating a surface of a substrate with the sol, and performing thermal treatment to prepare the hydrophobic/ultra-hydrophilic titanium dioxide thin film. Through selection of different surfactants, different thin films having ultra-hydrophilic or strong-hydrophobic performances can be produced on the same production line through the same technology, so that the preparation method is suitable for different demands on products in large-scale industrial production. The thin film actually achieves the ultra-hydrophilic/strong-hydrophobic functions (a contact angle is less than 5 degrees or is more than 130 degrees).

Description

technical field [0001] The invention belongs to the field of functional films, and in particular relates to a titanium dioxide hydrophobic / superhydrophilic functional film and a preparation method thereof. Background technique [0002] In recent years, the potential applications of superphilic / hydrophobic materials inspired by the "lotus leaf effect" in self-cleaning, microfluidic systems, and biocompatibility have stimulated widespread interest in academia and industry. Superhydrophobic material is a material that repells water. The contact angle between the surface of the material and water is greater than 150°. Water droplets cannot slide and spread on the surface and keep rolling in a spherical shape, thereby achieving the effect of rolling self-cleaning. Super-hydrophilic materials refer to materials with a contact angle of less than 5° between the surface of the material and water, so that water droplets form a water film on the surface of the substrate, thereby inhibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C03C17/25
CPCC03C17/256C03C2217/212C04B41/5072C04B41/85
Inventor 张世英刘芳张向超
Owner 益阳金陇电子科技有限公司
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