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Preparation method of super-hydrophilic mesoporous silicon oxide films

A mesoporous silica and super-hydrophilic technology, applied in the field of functional material technology and ordered mesoporous materials, can solve the problems of not reaching the super-hydrophilic state, long preparation period, difficult practical application, etc., and achieve easy industrial production. , low cost, good uniformity

Inactive Publication Date: 2010-02-10
KAYMAO TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN101168475A discloses a SiO with different sizes 2 A method for preparing superhydrophilic self-cleaning anti-fog coatings by assembling spherical composite particles and polymer electrolyte layers, but this method is very cumbersome to operate and has a long preparation cycle, making it difficult for practical application
Although there are also reports on the preparation of hydrophilic mesoporous silicon oxide films, the contact angle between the film and water is about 20°, which does not reach the superhydrophilic state (Yamashita H. et al., Catalysis Today, 2006, 111: 254-258 )

Method used

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Embodiment 1

[0031] Preparation of super-hydrophilic mesoporous silicon oxide film: the method of the present invention uses a sol-gel process to prepare a mesoporous silicon oxide film by spin coating.

[0032] First place the ordinary glass in water and use ultrasonic waves with a frequency of 50Hz to clean it for 10 minutes, then wash it three times with deionized water and absolute ethanol respectively, then soak the ordinary glass in 10% NaOH solution for 20 minutes, and wash it with deionized water After cleaning 5 times, place it in an oven at 100°C for 1 hour to dry, and use it as a coating substrate;

[0033] With tetraethyl orthosilicate (TEOS) as the silicon source, polyoxyethylene (4) ether lauryl alcohol (Brij30) as the template, according to the material ratio, TEOS: Brij30: HCl: EtOH (dehydrated alcohol) = 8: 0.9:0.8:50, prepare reactants. First, the mixed solution of absolute ethanol and TEOS is added to the mixed solution of Brij30 and hydrochloric acid, the pH of the mix...

Embodiment 2

[0037] First place the ordinary glass in water and use ultrasonic waves with a frequency of 50Hz to clean it for 10 minutes, then wash it three times with deionized water and absolute ethanol respectively, then soak the ordinary glass in 15% NaOH solution for 10 minutes, and wash it with deionized water After cleaning 5 times, place it in an oven at 100°C for 1 hour to dry, and use it as a coating substrate;

[0038]With tetraethyl orthosilicate (TEOS) as the silicon source, polyoxyethylene (4) ether lauryl alcohol (Brij30) as the template, according to the material ratio, TEOS: Brij30: HCl: EtOH (dehydrated alcohol) = 8: 0.9:0.8:50, prepare reactants. First, add the mixture of absolute ethanol and TEOS to the mixture of Brij30 and hydrochloric acid, the pH of the mixture of Brij30 and hydrochloric acid is 4, and then heat it in a collector type constant temperature magnetic stirrer at 20°C at 20r / min The precursor was obtained after stirring at a stirring rate of 10 min.

...

Embodiment 3

[0042] First place the ordinary glass in water and use ultrasonic waves with a frequency of 50Hz to clean it for 10 minutes, then wash it three times with deionized water and absolute ethanol respectively, then soak the ordinary glass in 5% NaOH solution for 30 minutes, and wash it with deionized water After cleaning 5 times, place it in an oven at 100°C for 1 hour to dry, and use it as a coating substrate;

[0043] With tetraethyl orthosilicate (TEOS) as the silicon source, polyoxyethylene (4) ether lauryl alcohol (Brij30) as the template, according to the material ratio, TEOS: Brij30: HCl: EtOH (dehydrated alcohol) = 8: 0.9:0.8:50, prepare reactants. First, add the mixture of absolute ethanol and TEOS to the mixture of Brij30 and hydrochloric acid, the pH of the mixture of Brij30 and hydrochloric acid is 4, and then heat it in a collector type constant temperature magnetic stirrer at 30°C at 15r / min The precursor was obtained after stirring at the stirring rate for 20 min. ...

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Abstract

The invention discloses a preparation method of super-hydrophilic mesoporous silicon oxide films. The method employs a sol-gel technique, utilizes ethyl orthosilicate as a silicon source and utilizespolyoxyethylene (4) laurinol as a template agent so as to prepare the mesoporous silicon oxide films on the surface of a glass substrate by a rotary coating method. The wrapping angle between the filmand water is 0 DEG, and the film is super-hydrophilic. The film formed on the glass has the advantages of high luminousness, no color, transparency, stability, evenness and wear resistance; and the surface of the film is easy to wash after being polluted by dust. The method has the advantages of simple operation, short period and low cost and can be widely used on the substrates of glass curtainwalls, bathroom mirrors, automobile windshields, rearview mirrors and the like which need self-cleaning antifog treatment.

Description

technical field [0001] The invention belongs to the field of functional material technology and ordered mesoporous materials, and in particular relates to a preparation method of a superhydrophilic mesoporous silicon oxide film. Background technique [0002] Due to the action of pollutants such as water, temperature difference and organic matter, a layer of fog or dirt is easily formed on the surface of transparent substrates such as vehicle glass, rearview mirrors, eyeglass lenses, and building glass, which not only greatly reduces transparency, but also increases cleaning costs and time. And it may affect the operation and operator's safety. However, superhydrophilic or superhydrophobic films have application value in anti-fog, self-cleaning, anti-oxidation or anti-oxidation, so the preparation of superhydrophilic or superhydrophobic film materials has attracted great interest. There are many patents at home and abroad for the preparation of antibacterial and self-cleanin...

Claims

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Application Information

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IPC IPC(8): C01B33/12C03C17/27
Inventor 胡芸陈佩仪吴艳林韦朝海
Owner KAYMAO TECH SHENZHEN
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