Self-cleaning super-hydrophilic thin film and preparation method thereof

A super-hydrophilic, self-cleaning technology, applied in chemical instruments and methods, other chemical processes, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of large loss of active components, difficulties in practical processes, and difficulty in sedimentation and other problems, to achieve the effect of low equipment requirements, low production costs, and difficult recycling

Inactive Publication Date: 2009-12-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A large number of studies have shown that due to the powder TiO 2 The particles are fine, easy to coagulate, not easy to settle, difficult to recycle in aqueous solution, and the loss of active ingredients is large, which has great difficulties in the practical process

Method used

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  • Self-cleaning super-hydrophilic thin film and preparation method thereof
  • Self-cleaning super-hydrophilic thin film and preparation method thereof
  • Self-cleaning super-hydrophilic thin film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Measure 10ml of tetrabutyl titanate, add 300ml of absolute ethanol to make a solution, drop 3-4 drops of glacial acetic acid at a stirring speed of 150r / min, and magnetically stir for 30min at room temperature to fully mix the solution to obtain A solution. At the same time, another 1ml of distilled water and 200ml of absolute ethanol were added, and the mass ratio of tetrabutyl titanate was 0.5% La(NO 3 ) 3 ·6H 2 O, magnetically stirred for 30min to obtain B solution. Slowly add the obtained B solution to A solution, add hydrochloric acid to adjust the pH to 3, and stir for 30 minutes to obtain stable, uniform, clear and transparent TiO 2 Sol. Preparation of Rare Earth Doped Nano TiO by Impregnation-Pull Method Using Self-made Film Pulling Machine 2 film. Dip the pretreated substrate into the prepared sol, and pull the coating after the glass sheet and the liquid level are stable. After coating a layer of film, dry at 50-100°C for 5-10min and cool at room temper...

Embodiment 2

[0024] Measure 20ml of tetrabutyl titanate, add 300ml of absolute ethanol to make a solution, drop 3-4 drops of glacial acetic acid at a stirring speed of 150r / min, and magnetically stir for 30min at room temperature to fully mix the solution to obtain A solution. At the same time, another 1ml of distilled water and 200ml of absolute ethanol were added, and the mass ratio of tetrabutyl titanate was 0.5% La(NO 3 ) 3 ·6H 2 O and 0.05% Fe(NO 3 ) 3 9H 2 O, magnetically stirred for 30min to obtain B solution. Slowly add the obtained B solution into A solution, add hydrochloric acid to adjust the pH to 4, and stir for 30 minutes to obtain stable, uniform, clear and transparent TiO 2 Sol. Preparation of Rare Earth Doped Nano TiO by Impregnation-Pull Method Using Self-made Film Pulling Machine 2 film. Dip the pretreated substrate into the prepared sol, and pull the coating film at a certain speed after the glass sheet and the liquid level are stable. After coating a layer of...

Embodiment 3

[0026] Measure 10ml of tetrabutyl titanate, add 300ml of absolute ethanol to make a solution, drop 3-4 drops of glacial acetic acid at a stirring speed of 150r / min, and magnetically stir for 30min at room temperature to fully mix the solution to obtain A solution. At the same time, another 1ml of distilled water and 200ml of absolute ethanol were taken, and the mass ratio of tetrabutyl titanate was 0.1-1.0% Ce(NO 3 ) 3 ·6H 2 O, magnetically stirred for 30min to obtain B solution. Slowly add the obtained B solution into A solution, add hydrochloric acid to adjust the pH to 5, and stir for 30 minutes to obtain stable, uniform, clear and transparent TiO 2 Sol. Preparation of Rare Earth Doped Nano TiO by Impregnation-Pull Method Using Self-made Film Pulling Machine 2 film. Dip the pretreated substrate into the prepared sol, and pull the coating after the glass sheet and the liquid level are stable. After coating a layer of film, dry at 50-100°C for 5-10min and cool at room ...

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Abstract

The invention provides a self-cleaning super-hydrophilic thin film and a preparation method thereof. The preparation method comprises the steps of using tetra-n-butyl titanate as a precursor of TiO2, using anhydrous ethyl alcohol as solvent, adding glacial acetic acid, and magnetically agitating at room temperature to obtain solution A; synchronously, taking distilled water and anhydrous ethyl alcohol, adding doping salts, and magnetically agitating the mixture to obtain solution B; slowly adding the solution B to the solution A, adding hydrochloric acid to adjust pH value to 3-5, agitating to obtain TiO2 sol, and preparing a rare-earth-doped nanometer-sized TiO2 thin film by using a film drawing machine; immersing a substrate into the sol, drawing and plating a film after glass sheet and liquid surface are stable; drying after plating a layer of film and cooling at room temperature; repeating the steps to prepare the rare earth-doped nanometer-sized TiO2 thin film with different layers; thermally treating the base plated with the TiO2 thin film, and directly using the film-plated base. The thin film of the invention overcomes the weak points that nanometer-sized powder easily aggregates and is not easily recovered, the obtained crystal form is table, and the thin film has excellent self-cleaning and hydrophilic capacities.

Description

technical field [0001] The invention relates to a preparation method of a nano-scale self-cleaning super-hydrophilic film, which is used to realize functions such as decontamination and anti-fog in related fields. Background technique [0002] In real life, the frost, fog, etc. on the windshield of the car will directly affect the driver's field of vision, especially in rainy days, this situation is more serious, and it is very easy to cause traffic accidents. And our daily utensils such as glasses, vanity mirrors, etc. will have a layer of dirt after a period of time, which is difficult to rinse off with clean water. Therefore, the research on self-cleaning superhydrophilicity has attracted more and more attention. And a certain structure of nano-titanium dioxide film has a special function, that is, the ultraviolet rays in the sun will change the microstructure of this film to form a layer, so that water and oil can completely diffuse on it without forming drops or adhesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/18C03C17/23B01J23/10B01J21/06B01J35/00
Inventor 尹荔松郑劲松安科云翟明飞
Owner CENT SOUTH UNIV
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