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Preparation method of anti-reflection self-cleaning coated glass

A coated glass and self-cleaning technology, which is applied in the field of preparation of anti-reflection and self-cleaning coated glass, can solve the problems of poor UV aging resistance, unsatisfactory self-cleaning effect, and inability to achieve super-hydrophilicity, etc., and achieve UV aging resistance Excellent, improve the visible light transmittance, reduce the temperature effect

Inactive Publication Date: 2013-05-08
上海圣元新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, hydrothermal pretreatment of the glass substrate is required, and the required equipment and processes are complex, making it difficult to realize industrialization
At present, the self-cleaning coated glass prepared by the sol-gel method often needs to be baked at a relatively high temperature (generally above 400°C), and it cannot achieve superhydrophilicity under the condition of no light, and the self-cleaning effect is not ideal.
In addition, there are currently organic ingredients (such as: MgF 2 ) as an anti-reflection coating material for glass, but the obtained glass often has poor UV aging resistance

Method used

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  • Preparation method of anti-reflection self-cleaning coated glass

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preparation example Construction

[0023] The present invention relates to a kind of preparation method of anti-reflection self-cleaning coated glass, which comprises the following steps:

[0024] Step 1. Preparation of SiO 2 -TiO 2 Composite sol: nano-SiO 2 Sol and Nano TiO 2 The sol is mixed according to the silicon-titanium molar ratio of 1:5-30, stirred evenly, then an acid catalyst is added dropwise to adjust the pH value of the mixed sol to 2-4, and the stirring is continued to obtain the SiO 2 -TiO 2 Composite sol;

[0025] Step 2. Coating by pulling method: first put the clean glass substrate on the pulling machine, and then put the glass substrate on the SiO 2 -TiO 2 After fully immersing in the composite sol for 5-20 minutes, pull it up at a pulling rate of 1-20cm / min, and then let the glass substrate with the wet film attached to it dry at room temperature for 10-20 minutes, and the surface of the glass substrate forms a The layer has a roughness nano film layer;

[0026] Step 3. Post-treatme...

Embodiment 1

[0028] Step 1. Preparation of TiO 2 Sol:

[0029] Anatase TiO 2 The powder is completely dissolved in deionized water, anatase TiO 2 The molar ratio of powder to deionized water is 1:5 to obtain the TiO 2 Sol;

[0030] Step 2. Preparation of SiO 2 Sol:

[0031] Weigh tetraethyl orthosilicate, absolute ethanol, deionized water and acid catalyst (30% nitric acid aqueous solution) with a molar ratio of 1:15:1:0.001, dilute ethyl orthosilicate with absolute ethanol, The mixed solution of acid catalyst and deionized water was added dropwise, the above mixed solution was stirred and reacted for 4 hours at 20°C, and then aged for 1 day, and the reacted mixed solution was diluted 1.2 times with additional absolute ethanol to obtain The SiO 2 Sol, spare;

[0032] Step 3. Preparation of SiO 2 -TiO 2 Composite sol:

[0033] nano-SiO 2 Sol and Nano TiO 2 The sol is mixed according to the silicon-titanium molar ratio of 1:5, stirred evenly, and then an acid catalyst (30% nitri...

Embodiment 2

[0039] Step 1. Preparation of TiO 2 Sol:

[0040] Anatase TiO 2 The powder is completely dissolved in deionized water, anatase TiO 2 The molar ratio of powder to deionized water is 1:30 to obtain the TiO 2 Sol;

[0041] Step 2. Preparation of SiO 2 Sol:

[0042] Weigh tetraethyl orthosilicate, absolute ethanol, deionized water and acid catalyst (20% sulfuric acid aqueous solution) with a molar ratio of 1:30:5:0.01, dilute ethyl orthosilicate with absolute ethanol, drop Add the mixed solution of acid catalyst and deionized water, ultrasonically react the above mixed solution at 30°C for 20 minutes, let it stand for aging for 2 days, and then dilute the reacted mixed solution by 0.8 times with additional absolute ethanol to obtain the obtained SiO 2 Sol, spare;

[0043] Step 3. Preparation of SiO 2 -TiO 2 Composite sol:

[0044] nano-SiO 2 Sol and Nano TiO 2 The sol is mixed according to the silicon-titanium molar ratio of 1:30, stirred evenly, and then an acid cata...

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Abstract

The invention discloses a preparation method of anti-reflection self-cleaning coated glass, which comprises the steps of preparing a SiO2-TiO2 composite sol firstly, then carrying out film coating by using a pulling method, and forming a coarse nano thin film layer on the surface of a glass substrate through the SiO2-TiO2 composite sol; and finally, carrying out low-temperature post-treatment on the obtained product so as to obtain coated glass. By using the preparation method disclosed by the invention, the visible light transmittance of the prepared coated glass can be improved, the light transmittance is increased by 2-3%, and the prepared coated glass can achieve a photocatalytic self-cleaning effect. The preparation method disclosed by the invention is simple, a glass substrate is not required to be subjected to complex pretreatment, and coated glass is not required to be subjected to high-temperature baking. The coated glass prepared by using the method disclosed by the invention has excellent ultraviolet aging resistance; and because a coated layer is a nano film, and the surface of the nano film has a proper roughness, the nano film can achieve a physical hydrophilic effect, so that the coated layer on the surface of the glass substrate also can have a super-hydrophilic self-cleaning performance under the condition of no light.

Description

technical field [0001] The invention relates to a preparation method of coated glass, in particular to a preparation method of anti-reflection self-cleaning coated glass. Background technique [0002] At present, there are few reports on the preparation of coated glass with both anti-reflection and photocatalytic self-cleaning effects by coating the glass surface. Among them, the patent number is CN102649623A, and the invention patent titled "Anti-reflective super-hydrophilic self-cleaning anti-fog glass and its preparation method" adopts two methods of heating water bath under normal pressure or sealing heating water heat, through alkaline aqueous solution Efficient etching is carried out on glass sheets of various components to obtain anti-reflection super hydrophilic self-cleaning anti-fog glass. In this patent, hydrothermal pretreatment is required for the glass substrate, and the required equipment and processes are complex, making it difficult to realize industrializa...

Claims

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Application Information

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IPC IPC(8): C03C17/23
Inventor 杜云贵方建辉刘小文李建光
Owner 上海圣元新能源科技有限公司
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