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Composite film, its preparation method and composite material

A composite film and film technology, which is applied in the field of composite film and its preparation and composite materials, can solve the problems of low gloss rate and low self-cleaning ability, and achieve the effect of high light transmittance and long-lasting self-cleaning ability

Active Publication Date: 2013-01-30
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of low self-cleaning ability and low gloss rate of the titanium dioxide film in the prior art, thereby providing a titanium dioxide film capable of self-cleaning ability and high light transmittance for a long time and its preparation method and containing the thin film composites

Method used

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  • Composite film, its preparation method and composite material

Examples

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preparation example Construction

[0028] The present invention provides a kind of preparation method of above-mentioned thin film, and this method comprises the following steps:

[0029] The method includes the following steps:

[0030] S1. Preparation of SiO 2 sol

[0031] SS1 Mix ethyl orthosilicate and hydrated absolute ethanol and stir to form a mixed solution; wherein, the molar ratio of each substance is: ethyl orthosilicate: water: absolute ethanol=1:3-5:35-45 , and then adjust the pH value to 2-4 with acid, and age with stirring;

[0032] SS2 adjusts the pH of the mixed solution in step SS1 to 8-10 with alkali, and ages to form a sol;

[0033] SS3 adjust the pH value of the sol in step S2 to 2-4 with acid to obtain acidic SiO 2 Sol;

[0034] S2, preparation of TiO 2 sol

[0035] Mix tetrabutyl titanate, water, acetylacetone and absolute ethanol and stir evenly, TiO 2 The molar ratio of each substance in the sol is tetrabutyl titanate: water: acetylacetone: absolute ethanol = 1: 2-3: 0.5-1.5: 16-2...

Embodiment 1

[0057] S1, preparation of SiO2 sol

[0058] SS1 Mix ethyl orthosilicate and hydrated absolute ethanol and stir to form a mixed solution; among them, the molar ratio of each substance is: ethyl orthosilicate: water: absolute ethanol = 1:4:40, and then use hydrochloric acid Adjust the pH value to 3, stir for 4 hours, and age for 24 hours;

[0059] SS2 adjusts the pH of the mixed solution in step SS1 to 9 with sodium hydroxide, and ages for 24 hours to form a sol;

[0060] SS3 adjusting the pH value of the sol in step S2 to 3 with hydrochloric acid to obtain an acidic SiO2 sol;

[0061] S2, prepare TiO2 sol

[0062] Mix tetrabutyl titanate, water, acetylacetone and absolute ethanol and stir evenly. The molar ratio of each substance in the TiO2 sol is tetrabutyl titanate: water: acetylacetone: absolute ethanol = 1: 2.5: 1: 18, then adjust the pH value to 4 with hydrochloric acid, stir for 2 hours, and age for 24 hours;

[0063] S3, prepare SiO2-TiO2 composite sol

[0064] Whi...

Embodiment 2

[0071] Prepare the composite film A2 loaded on the substrate according to the method of Example 1, the difference is: in the nitrogen-doped N-SiO2-TiO2 composite sol, the content of titanium dioxide is 16mol, the content of silicon dioxide is 64mol, and the content of urea is 10mol; based on the total mass of the nitrogen-doped N-SiO2-TiO2 composite sol, the content of the surfactant is 5%.

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Abstract

The invention provides a composite film containing titanium dioxide and silicon dioxide, wherein the titanium dioxide is nitrogen doped titanium dioxide. In terms of the total mole number of the film, the titanium dioxide accounts for 9.8-49.8 mole percent, the silicon dioxide accounts for 44.8-88.2 mole percent, and the nitrogen element accounts for 0.4-2 mole percent. Being spherical, the silicon dioxide has an average particle size of 80-100nm. The invention also provides a preparation method of the thin film and a composite material containing the film. The film provided in the invention has high light transmittance and a strong self-cleaning ability.

Description

technical field [0001] The invention relates to a composite film, its preparation method and composite material. Background technique [0002] TiO 2 Thin film is an important functional material. Under the irradiation of ultraviolet light, the surface has highly hydrophilic characteristics, which can deeply oxidize organic pollutants and finally generate CO 2 and H 2 O et al. It has the functions of sterilization, self-cleaning, and photocatalytic degradation of dirt. It is often used on the surface of glass and other substrates to prepare self-cleaning products. For example, it can be used in architectural glass, curtain wall glass, partition glass, decorative glass, car windshield glass, car side window glass, reflector, skylight glass, lampshade glass, cover glass, hospital surgical equipment, kitchen glass, lens The surface of glass, home appliance glass, instrument glass, wall tiles and sanitary ware. However, currently since TiO 2 The self-cleaning effect of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23C04B41/85
Inventor 章国明黎宪宽
Owner BYD CO LTD
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