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A kind of preparation method of superhydrophilic nanometer tio2 film

A super-hydrophilic, thin-film technology, applied in the field of self-cleaning membranes, can solve problems such as poor transparency, limited application, and weak adhesion, and achieve the effects of high hydrophilicity, simple preparation methods, and low cost

Active Publication Date: 2015-12-30
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, nano-TiO prepared by the traditional sol-gel method 2 Generally, there are tiny cracks on the surface of the film, and the transparency is poor, and the adhesion is not strong. It can only show strong hydrophilicity under the irradiation of ultraviolet light or strong sunlight, which limits its application in daily life. application, and the contact angle between the existing film surface and water is about 5°

Method used

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  • A kind of preparation method of superhydrophilic nanometer tio2 film
  • A kind of preparation method of superhydrophilic nanometer tio2 film
  • A kind of preparation method of superhydrophilic nanometer tio2 film

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Embodiment 1

[0018] Dissolve 10 mL of butyl titanate in 20 mL of absolute ethanol, add 1.5 mL of acetylacetone, and stir magnetically at room temperature for 30 minutes to obtain solution A; dissolve 0.01 g of PVP in 10 mL of absolute ethanol and 1 mL of deionized water, and mix Uniformly obtain B solution. Under vigorous stirring, the B solution was slowly dropped into the A solution, and concentrated HNO 3 Adjust the pH value of the solution to 3, and continue to stir for 3 hours to obtain a stable yellow TiO 2 Sol. The obtained sol is aged for 2-7 days for later use. The glass slide (25.6 mm × 76.2 mm) was ultrasonically cleaned several times by HCl, absolute ethanol and deionized water in sequence, and the ultrasonic time was 30 min each time. Nano-TiO was prepared by coating on cleaned glass slides using a spin coater 2 For the thin film, the rotation speed of the spin coater is 2500r / min. After the film is coated, it is placed in a drying oven at 80°C to dry. Then, the TiO-coate...

Embodiment 2

[0020] Dissolve 10mL of butyl titanate in 20mL of absolute ethanol, add 1.5mL of acetylacetone, and stir magnetically at room temperature for 30min to obtain solution A; then dissolve 0.02g of PVP in 10mL of absolute ethanol and 1mL of deionized water, Mix well to obtain B solution. Under vigorous stirring, the B solution was slowly dropped into the A solution, and concentrated HNO 3 Adjust the pH value of the solution to 3, and continue to stir for 3 hours to obtain a stable yellow TiO 2 Sol. The obtained sol is aged for 2-7 days for later use. The glass slide (25.6 mm × 76.2 mm) was ultrasonically cleaned several times by HCl, absolute ethanol and deionized water in sequence, and the ultrasonic time was 30 min each time. Nano-TiO was prepared by coating on cleaned glass slides using a spin coater 2 For the thin film, the rotation speed of the spin coater is 2500r / min. After the film is coated, it is placed in a drying oven at 80°C to dry. Then, the TiO-coated 2 The gla...

Embodiment 3

[0022] Dissolve 10mL of butyl titanate in 20mL of absolute ethanol, add 1.5mL of acetylacetone, and stir magnetically at room temperature for 30min to obtain solution A; then dissolve 0.03g of PVP in 10mL of absolute ethanol and 1mL of deionized water, Mix well to obtain B solution. Under vigorous stirring, the B solution was slowly dropped into the A solution, and concentrated HNO 3 Adjust the pH value of the solution to 3, and continue to stir for 3 hours to obtain a stable yellow TiO 2 Sol. The obtained sol is aged for 2-7 days for later use. The glass slide (25.6 mm × 76.2 mm) was ultrasonically cleaned several times by HCl, absolute ethanol and deionized water in sequence, and the ultrasonic time was 30 min each time. Nano-TiO was prepared by coating on cleaned glass slides using a spin coater 2 For the thin film, the rotation speed of the spin coater is 2500r / min. After the film is coated, it is placed in a drying oven at 80°C to dry. Then, the TiO-coated 2 The gla...

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Abstract

The invention discloses a preparation method of a superhydrophilic nano-TiO2 thin film, using butyl titanate as a precursor of TiO2, using absolute ethanol as a solvent, adding acetylacetone as an inhibitor, and stirring magnetically at room temperature to obtain a solution ; Separately take absolute ethanol and deionized water, and add appropriate amount of PVP to obtain B solution; under strong stirring, slowly drop B solution into A solution, and use acid to adjust the pH value of the solution to 3, and continue to stir for 3 hours to obtain a stable solution. TiO2 sol, the sol is aged for 2 to 7 days for later use; use a spin coater to prepare nano-TiO2 thin films on cleaned glass slides, and put them in a drying oven to dry after coating, and finally perform heat treatment and annealing. That is, a nano-TiO2 film with super-hydrophilic properties is obtained. The surface of the super-hydrophilic nano-TiO2 film is smooth and uniform, the crystal form is stable, and there are no cracks. The contact angle between the surface of the film and water can reach 0° indoors, and it has a strong self-cleaning ability. .

Description

technical field [0001] The invention relates to the technical field of self-cleaning membranes, in particular to a superhydrophilic nano-TiO 2 The method of film preparation. Background technique [0002] TiO 2 As a photocatalytic material, it has the advantages of high chemical activity, strong oxidation ability, non-toxicity and no photocorrosion, and has been widely valued. where TiO 2 Films have great application value because they are not easy to agglomerate, can be reused, and are convenient for recycling. In addition, due to the nano-TiO 2 The film is hydrophilic, so it can be coated with TiO on the surface of glass, ceramics, mirrors, building materials, etc. 2 Coating can effectively improve its anti-pollution ability, which brings great convenience to people's daily environmental maintenance. [0003] However, nano-TiO prepared by the traditional sol-gel method 2 Generally, there are tiny cracks on the surface of the film, and the transparency is poor, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23
Inventor 彭寿王芸操芳芳彭程杨扬
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD