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Method for preparing self-cleaning antifogging coating film

An anti-fog coating and self-cleaning technology, applied in the field of thin films, can solve problems such as pollution, achieve the effects of reducing apparent contact angle, improving water wetting performance, and good superhydrophilic performance

Active Publication Date: 2012-10-10
佛山市南牧新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the pollution problems on the surface of building exterior wall materials and in the use of glass, the present invention proposes a TiO2 with abundant nano-sized pores. 2 / SiO 2 Preparation method of composite film

Method used

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  • Method for preparing self-cleaning antifogging coating film
  • Method for preparing self-cleaning antifogging coating film
  • Method for preparing self-cleaning antifogging coating film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Nano-TiO 2 Preparation of granules:

[0038] (1) Mix 5 mL of n-butyl titanate (TBOT) with 2 mL of acetylacetone (ACAC), stir for 10 min, add 2 mL of cyclohexane, and continue stirring for 30 min to obtain solution A.

[0039] (2) Prepare 40 mL of double-distilled aqueous solution B of 800 mg / L dodecylbenzenesulfonic acid.

[0040](3) Add solution B to solution A under magnetic stirring, and keep stirring for 20 min to obtain the emulsion of TBOT.

[0041] (4) Add 40 mL of absolute ethanol to the formed emulsion and continue stirring for 30 min to obtain a clear and transparent microemulsion.

[0042] (5) Transfer the microemulsion to a reactor with a polytetrafluoroethylene inner cup, and react at a temperature of 150 °C for 24 h to obtain TiO 2 suspension.

[0043] 2. TiO 2 Film preparation:

[0044] (1) The glass substrate will be washed successively with ethanol, acetone and water, and then dried at 100°C for 30 min.

[0045] (2) Dip the dried glass subst...

Embodiment 2

[0056] 1. Nano-TiO 2 Preparation of granules:

[0057] (1) Mix 5 mL of n-butyl titanate (TBOT) with 2 mL of acetylacetone (ACAC), stir for 10 min, add 2 mL of cyclohexane, and continue stirring for 30 min to obtain solution A.

[0058] (2) Prepare 40 mL of double-distilled aqueous solution B of 72 mg / L dodecylbenzenesulfonic acid.

[0059] (3) Add solution B to solution A under magnetic stirring, and keep stirring for 20 min to obtain the emulsion of TBOT.

[0060] (4) Add 40 mL of absolute ethanol to the formed emulsion and continue stirring for 30 min to obtain a clear and transparent microemulsion.

[0061] (5) Transfer the microemulsion to a reactor with a polytetrafluoroethylene inner cup, and react at a temperature of 150 °C for 24 h to obtain TiO 2 suspension.

[0062] 2. SiO 2 Sol configuration:

[0063] (1) Add 5 mL ethyl orthosilicate to 75 mL ethanol, and stir magnetically at room temperature for 2 min to obtain ethyl orthosilicate solution C.

[0064] (2) ...

Embodiment 3

[0080] 1. Nano-TiO 2 Preparation of granules:

[0081] (1) Mix 5 mL of n-butyl titanate (TBOT) with 2 mL of acetylacetone (ACAC), stir for 10 min, add 2 mL of cyclohexane, and continue stirring for 30 min to obtain solution A.

[0082] (2) Prepare 40 mL of double-distilled aqueous solution B of 72 mg / L dodecylbenzenesulfonic acid.

[0083] (3) Add solution B to solution A under magnetic stirring, and keep stirring for 20 min to obtain the emulsion of TBOT.

[0084] (4) Add 40 mL of absolute ethanol to the formed emulsion and continue stirring for 30 min to obtain a clear and transparent microemulsion.

[0085] (5) Transfer the microemulsion to a reactor with a polytetrafluoroethylene inner cup, and react at a temperature of 150 °C for 24 h to obtain TiO 2 suspension.

[0086] 2. SiO 2 Sol configuration:

[0087] (1) Add 5 mL ethyl orthosilicate to 75 mL ethanol, and stir magnetically at room temperature for 2 min to obtain ethyl orthosilicate solution C.

[0088] (2) ...

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Abstract

The invention discloses a method for preparing self-cleaning antifogging coating film and belongs to the technical field of films. The method includes: subjecting a disperse system of tetrabutyl titanate to hydrothermal treatment to obtain TiO2 nano particle suspension; and dispersing SiO2 sol into the TiO2 suspension to obtain a TiO2 / SiO2 composite film by means of the dip-coating technique. The TiO2 particles are adhered and attached to the surface of a glass substrate by amorphous SiO2. Proper roughness factors are jointly provided by the TiO2 particles and continuous nano pore passages distributed in the film, and the apparent contact angle of water on the surface can be effectively decreased. The wettability of water on the surface of the film is further improved by a great quantity of OH groups carried by the amorphous SiO2, so that the super-hydrophilcity of the film can still be maintained after long-time outdoor placement.

Description

technical field [0001] The invention relates to a preparation method of a self-cleaning anti-fog coating film, which belongs to the technical field of films. Background technique [0002] Due to the influence of human production activities and natural forces, the ambient atmosphere contains floating particles of various sizes. These dust particles are easy to adhere to the surface of objects in the air and cause pollution. Especially after the building window glass and automobile glass accumulate dust, it not only affects the appearance, but also reduces the light transmission performance of the glass. Especially after the surface of the automobile glass is polluted, the rainwater will form scattered water droplets on the surface of the rearview mirror and the window glass to fog the glass, which will affect the driver's observation of the driving conditions. Theoretically, the contact angle between water droplet and solid material surface depends on the interfacial tensio...

Claims

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Application Information

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IPC IPC(8): C03C17/23
Inventor 董如林刘淑赟王彩霞陈智栋金长春王文昌
Owner 佛山市南牧新材料有限公司
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