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A kind of superhydrophilic self-cleaning film and preparation method thereof

A super-hydrophilic, self-cleaning technology, applied in the field of functional materials, can solve the problems of limiting titanium dioxide super-hydrophilic film, affecting the service life of the film, and difficult to restore the super-hydrophilic property, so as to broaden the visible light absorption edge, prolong the service life, The effect of prolonging the retention time of hydrophilicity

Inactive Publication Date: 2017-09-01
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, it has been confirmed by previous studies that after a certain period of time after induction, or in the absence of ultraviolet light, the super-hydrophilic titanium dioxide film often loses its hydrophilic properties and recovers within a few days. to the hydrophobic state, and it is difficult to restore the superhydrophilic property after a period of time, which greatly affects the service life of the film and is difficult to apply in actual production
These problems limit the application of titanium dioxide superhydrophilic films, which are problems that need to be solved urgently at this stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043](1) Add 10 g of tetrabutyl titanate to a mixed solution of 10 g of acetylacetone and 150 g of absolute ethanol and stir magnetically for 60 min to obtain a light yellow solution A;

[0044] (2) Mix 30g absolute ethanol, 30g deionized water, 4.5g Dupont TM Zonyl (R) FS-300 and 4.5g triethylamine are fully mixed to obtain solution B;

[0045] (3) Slowly add solution B dropwise to solution A after stirring for 60 minutes, and continue stirring for 80 minutes to obtain a light yellow uniform and transparent sol;

[0046] (4) Aging the prepared sol for 24 hours;

[0047] (5) Ultrasonic clean the glass substrate in acetone, absolute ethanol, and distilled water for 15 minutes, and then dry it for later use;

[0048] (6) Coat the aged sol in step (4) using the spin coating method, specifically: spin coat at a low speed of 800rpm for 10s, then spin coat at a high speed of 1800rpm for 10s and dry in step (5) for later use On the substrate, dry at room temperature in a ventila...

Embodiment 2

[0052] (1) Add 10 g of tetrabutyl titanate to a mixed solution of 8 g of acetylacetone and 100 g of absolute ethanol and mechanically stir for 60 min to obtain a light yellow solution A;

[0053] (2) Mix 20g isopropanol, 20g deionized water, 1.5g Dupont TM Mix Zonyl(R)FS-3100 and 1.5g triethylamine thoroughly to obtain solution B;

[0054] (3) Slowly add solution B dropwise to solution A after stirring for 60 minutes, and continue stirring for 60 minutes to obtain a light yellow uniform and transparent sol;

[0055] (4) Aging the prepared sol for 20 hours;

[0056] (5) Ultrasonic clean the ceramic substrate in acetone, absolute ethanol, and distilled water for 15 minutes, and then dry it for later use;

[0057] (6) Coat the aged sol in step (4) on the ceramic substrate in step (5) by dipping and pulling method: use a mechanical elevator to dip the ceramic sheet in the sol, soak for 5 minutes, and then use 2mm / s speed to increase the ceramic sheet, immediately put it in a ...

Embodiment 3

[0061] (1) Add 10g of tetrabutyl titanate to a mixed solution of 12g of triethanolamine and 200g of absolute ethanol and stir magnetically for 120min to obtain a light yellow solution A;

[0062] (2) Mix 40g isopropanol, 40g deionized water, 10g Dupont TM Fully mix Zonyl(R)FSN-100 with 10g ammonia water to obtain solution B;

[0063] (3) Slowly add solution B dropwise to solution A after stirring for 120 minutes, and continue stirring for 120 minutes to obtain a light yellow uniform and transparent sol;

[0064] (4) Aging the prepared sol for 30 hours;

[0065] (5) Ultrasonic clean the glass substrate in acetone, absolute ethanol, and distilled water for 15 minutes, and then dry it for later use;

[0066] (6) Coating the aged sol in step (4) on the spare glass substrate dried in step (5) by casting method, then drying in a ventilated drying oven at room temperature, and repeating 7 times;

[0067] (7) Put the film dried in step (6) into a muffle furnace for heat treatment,...

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Abstract

The invention belongs to the technical field of a function material, and in particular relates to a super hydrophilic self-cleaning titanium dioxide film with microcosmic coarse structure, visible-light response and doped with fluorine, nitrogen and having adjustable content and a preparation method thereof; the super hydrophilic self-cleaning film overcomes the problems of the prior art that the visible-light response range of the titanium dioxide film is narrow, the hydrophilic effect maintaining time is short and the hydrophilic is easy to lose. The hydrophilic of the film is not limited for the ultraviolet light, and the visible light can be used for inducing the hydrophilic, and the hydrophilic nature is maintained for a long time without the irradiation of the visible light, the hydrophilic nature can be recovered through the irradiation of the visible light and the super hydrophilic self-cleaning film has broad development and application space.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a super-hydrophilic self-cleaning titanium dioxide film with a microcosmic rough structure visible light response, doped with fluorine and nitrogen and whose content can be adjusted, and a preparation method thereof. Background technique [0002] The super-hydrophilic film will make the contact angle of small water droplets on the surface of the film close to 0° (generally up to 10°). When water touches the surface of the film, it will spread rapidly on the surface to form a uniform water film. superhydrophilic properties. The function of this property can prevent the formation of small water droplets, and at the same time, the influence of the water film on the light transmittance is also greatly reduced, and it will not affect the mirror imaging, so as to achieve the anti-fog effect. Titanium dioxide film is not only super-hydrophilic, but also photoca...

Claims

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Application Information

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IPC IPC(8): C23C18/12
CPCC23C18/1208C23C18/1254
Inventor 马素德李超
Owner XIHUA UNIV
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