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Preparation method of zinc-doped porous SiO2/TiO2 self-cleaning composite film

A composite film and self-cleaning technology, applied in the field of self-cleaning coatings, can solve problems such as difficult to clean oil stains, reduce the function of solar panels, and easily form water marks

Active Publication Date: 2014-06-25
JIANGNAN UNIV
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AI Technical Summary

Problems solved by technology

[0004] The surface of solar panels used outdoors for a long time is prone to water marks or oil stains that are not easy to clean, which seriously reduces the function of solar panels

Method used

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Examples

Experimental program
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Embodiment 1

[0013] Take EtOH (70ml), NH 3 ·H 2 O (1.8ml), H 2 O (8ml) was mixed evenly, which was recorded as liquid A; EtOH (70ml), TEOS (4ml) were mixed evenly, and then an appropriate amount of stabilizer polyethylene glycol 400 was added, which was recorded as liquid B. Drop liquid B into liquid A and keep stirring. After the dropwise addition, heat to 60°C, reflux for 2 hours to remove ammonia, and then mix the solution with volume ratio EtOH:butyl titanate:diethanolamine=70:2:0.3 Stirring to prepare mixed gels with different silica gel volume contents, Zn 2+ by ZnCl 2 Introduction, add 0.2g ZnCl per 2ml butyl titanate 2 , and finally add an appropriate amount of polyethylene glycol 2000 (PEG2000), and place the above solution at room temperature for 2 days before it can be used for coating.

[0014] The composite film is prepared from the above-mentioned composite sol precursor by dipping and pulling method using a clean ordinary glass slide as the substrate, and the pulling sp...

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Abstract

The invention relates to a preparation method of a zinc-doped porous SiO2 / TiO2 self-cleaning composite film, the zinc-doped porous SiO2 / TiO2 (porous Zn-SiO2TiO2) self-cleaning composite film is prepared by a titanium alkoxide composite sol precursor containing polyethylene glycol and a composite sol precursor of silicon alkoxide through a dip-coating method. The addition of SiO2 has inhibition effect to the growth of TiO2 crystal grain, and the addition of SiO2 is in favor of increasing the hydrophilcity of a TiO2 film; the gap of the film surface can effectively increase the surface area of the film, furthermore the self-cleaning efficiency of a film coating is increased; and the doping of the zinc ions can obviously increase the TiO2 photocatalysis efficiency. The zinc-doped porous SiO2 / TiO2 self-cleaning composite film can be used for increasing permeability and self-cleaning performance of the buildings, automobiles and solar energy glass plates, and has good application prospect.

Description

technical field [0001] A zinc-doped porous SiO 2 / TiO 2 The invention discloses a preparation method of a self-cleaning composite film, which belongs to the field of self-cleaning coatings. Background technique [0002] As an important application research direction of modern optics, optical thin films have been widely used in industry, agriculture, medicine, transportation, military, construction, astronomy, infrared physics, laser technology and other fields, and have more and more influence on people's daily life and work. bigger and bigger. The further development of science and technology, especially the rapid development of optical communication and display technology, puts forward newer and higher requirements for the design and preparation process of various types of optical thin films, and the design and preparation technology of optical thin films is also facing severe challenges. Anti-reflection film is the most important kind of optical film, and its developme...

Claims

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Application Information

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IPC IPC(8): C03C17/22
Inventor 姚伯龙胡张顺
Owner JIANGNAN UNIV
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