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Transparent self-cleaning film, preparation and uses thereof

A self-cleaning and transparent technology, applied to special surfaces, devices for coating liquids on surfaces, coatings, etc., can solve the problems of high energy consumption, complexity of the preparation method of superhydrophobic coatings, low mechanical strength, etc. The effect of complex process, good industrial application prospect and simple process

Inactive Publication Date: 2011-07-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a transparent self-cleaning film and its simple preparation method, which overcomes the complexity of the preparation method of superhydrophobic coatings in the past, low mechanical strength and high energy consumption, and difficulty in applying to industrial production. The preparation method solves the above technical difficulties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, prepare transparent self-cleaning film

[0036] Take methyl orthosilicate (Si(OCH 3 ) 4 ) 1 part, 7.5 parts of absolute ethanol, 1 part of ammonia water, 0.5 part of water, and vigorously stir the above mixture at room temperature for 3 hours until uniform;

[0037] Coat a layer of film on the polyethylene substrate by dipping. After the film is dried at room temperature for 5 hours, it is placed in an ethanol solution with a concentration of 0.5mol / L monomethyltrichlorosilane, and self-assembled at 60°C for 2 hours. A transparent self-cleaning film is obtained.

[0038] The water contact angle of the film can reach 120°, the rolling angle is 20°, and the light transmittance is 0.93.

Embodiment 2

[0039] Embodiment 2, prepare transparent self-cleaning film

[0040] Take methyl orthosilicate (Si(OCH 3 ) 4 ) 2 parts, 6.5 parts of absolute ethanol, 0.5 parts of ammonia water, 1 part of water, and vigorously stir the above mixture at 40°C for 2 hours until uniform;

[0041]Then, directly add dodecyltrimethoxysilane, control its concentration at 1mol / L, continue to stir for 1h, let it rest for 5h, and dry the coating film at 50°C for 5h to obtain a transparent self-cleaning film.

[0042] The water contact angle of the film can reach 130°, the rolling angle is 20°, and the light transmittance is 0.95.

Embodiment 3

[0043] Embodiment 3, prepare transparent self-cleaning film

[0044] Take ethyl orthosilicate (Si(OC 2 h 5 ) 4 ) 1 part, 8 parts of absolute ethanol, 0.5 part of ammonia water, and 0.5 part of water, and the above mixture was vigorously stirred at 80° C. for 1.5 h until uniform.

[0045] Apply a thin film on the ceramic substrate by dipping, dry the film at 80°C for 0.5h, irradiate it with a UV lamp for 3h, and finally place it in an ethanol solution of octyltrichlorosilane (1mol / L) After self-assembly at 80°C for 4 hours, ultrasonic cleaning was performed for 5-15 minutes to obtain a transparent self-cleaning film.

[0046] The water contact angle of the film can reach 148°, the rolling angle is 10°, and the light transmittance is 0.94.

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Abstract

The invention discloses a transparent self-cleaning film, a preparation method and the application thereof. The method is as follows: 0.03-3 (parts by weight) of ortho-silicate ester, 4-9.5 of ethanol, 0.01-2 of ammonia and 0-1 of water are blended, stirred, formed to film and dried, and is put into a chemical solution with formula I general formula for self-assembly to obtain the film; and also the components can be even blended, and then a substrate is put into coating liquid and stands for film. In formula I, R1 is C1-C24 alkyl, aryl or fluorating group; R2 is C1-C6 alkyl; X is halogen or C1-C6 oxyl; N is 0, 1 or 2. The water contact angle of the film reach more 150 degrees, the lag angle is less than 20 degrees, the transmittance of the film is more than 0.90, the mechanical strength is higher and the self-cleaning is good. The preparation method has simple technique, low energy consumption and has good industry application prospect. R1Si(R2)nX<3-n> is formula I.

Description

[0001] technical field [0002] The invention relates to a transparent self-cleaning film and its preparation method and application. Background technique [0003] Coatings with superhydrophobic properties (the contact angle with water is greater than 150° and the hysteresis angle is small) have great application prospects in production and life. Due to the less contact area between the surface of these films and water, the chemical reactions that require water to occur and the formation of chemical bonds with water will not occur on the superhydrophobic surface. Correspondingly, various phenomena such as surface adsorption of snow and rain, surface oxidation, and frictional resistance will be correspondingly reduced or eliminated on the superhydrophobic surface. That is, they have what we usually call the self-cleaning function. Superhydrophobic doors and windows, building materials and exterior wall coatings with self-cleaning function are effective ways to solve rain and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C09D183/00B05D5/08
Inventor 卢晓英龙宇华徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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