A kind of preparation method of hydrophobic anti-friction translucent aluminum oxide film

A friction-resistant, alumina technology, applied in the preparation and coating of aluminum hydroxide, can solve the problems of poor friction resistance of organic films, large amount of sol in the pulling method, and high price of aluminum isopropoxide, so as to avoid large areas. The effect of corrosion, shortening the production time, and controlling the degree of corrosion

Inactive Publication Date: 2020-07-03
YUNNAN OPEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum isopropoxide is usually used to make sol, and the reaction time needs to be 6-12 hours, which is long and the price of aluminum isopropoxide is relatively high; spin coating or pulling method is mainly used, which is not suitable for materials with particularly large surface area and irregular shapes , and the amount of sol used in the pulling method is particularly large, and it is generally difficult to achieve single-sided coating; it is mainly a single-layer film; the hydrothermal method or acid-base corrosion method is used, that is, the entire film is immersed in water or corrosive solution and heated to make the surface rough degree, the film is corroded in a large area; a layer of organic film is coated on the surface of aluminum oxide film, and the friction resistance of the organic film is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The method for making aluminum hydroxide sol from aluminum sec-butoxide comprises the following steps:

[0025] 1) Preparation of alumina sol: 24.6 g of aluminum sec-butoxide was added to 180 g of distilled water at 85°C, stirred with magnetic force for 30 minutes, adjusted to pH 2 with 6 ml of nitric acid, and magnetically stirred at 85°C for 30 minutes to obtain alumina sol, The sol is aged for 5 days for use;

[0026] 2) Preparation of the glass carrier: take the slides and wash them in a sonicator with 100 ml of ethyl acetate, 100 ml of 95% ethanol, and 100 ml of deionized water in sequence for 30 minutes, and dry them for use;

[0027] 3) Repeated coating: Coat the glass carrier by spray method, dry it at room temperature for 1 day, and sinter it with a muffle furnace. The initial temperature is set to 50 °C, the heating rate is 1 °C / min, the temperature is kept at 200 °C for 30 minutes, and the temperature is kept at 350 °C. 30min, hold at 550℃ for 3h, repeat the...

Embodiment 2

[0031] The method for making aluminum hydroxide sol from aluminum sec-butoxide comprises the following steps:

[0032] 1) Preparation of alumina sol: 49.2 g of aluminum sec-butoxide was added to 360 g of distilled water at 85°C, stirred with magnetic force for 30min, adjusted to pH 2 with 12ml of nitric acid, and magnetically stirred at 85°C for 30min to obtain alumina sol, The sol is aged for 5 days for use;

[0033] 2) Preparation of the glass carrier: take the slides and wash them in a sonicator with 100 ml of ethyl acetate, 100 ml of 95% ethanol, and 100 ml of deionized water in sequence for 30 minutes, and dry them for use;

[0034] 3) Repeated coating: Coat the glass carrier by spray method, dry it at room temperature for 1 day, and sinter it with a muffle furnace. The initial temperature is set to 50 °C, the heating rate is 1 °C / min, the temperature is kept at 200 °C for 30 minutes, and the temperature is kept at 350 °C. 30min, hold at 550℃ for 1h, repeat the coating f...

Embodiment 3

[0038] The method for making aluminum hydroxide sol from aluminum sec-butoxide comprises the following steps:

[0039] 1) Preparation of alumina sol: 147.8 g of aluminum sec-butoxide was added to 1080 g of distilled water at 85°C, stirred with magnetic force for 30min, adjusted to pH 2 with 18ml of nitric acid, and magnetically stirred at 85°C for 30min to obtain alumina sol, The sol is aged for 5 days for use;

[0040] 2) Preparation of the glass carrier: take the slides and wash them in a sonicator with 100 ml of ethyl acetate, 100 ml of 95% ethanol, and 100 ml of deionized water in sequence for 30 minutes, and dry them for use;

[0041] 3) Repeated coating: Coat the glass carrier by spray method, dry it at room temperature for 1 day, and sinter it with a muffle furnace. The initial temperature is set to 50 °C, the heating rate is 1 °C / min, the temperature is kept at 200 °C for 30 minutes, and the temperature is kept at 350 °C. 30min, hold at 550℃ for 3h, repeat the coating...

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PUM

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Abstract

The invention discloses a preparation method of a hydrophobic friction-resistant semitransparent aluminum oxide film, which relates to an aluminum oxide film. The hydrophobic friction-resistant semitransparent aluminum oxide film is prepared from the following raw materials in parts by weight: 8 to 12 parts of aluminum tri-sec-butoxide, 800 to 1200 parts of distilled water, 2 to 4 parts of nitric acid, 80 to 120 parts of ethyl acetate, 80 to 120 parts of ethanol with mass percent concentration of 95 percent, 80 to 120 parts of deionized water, 80 to 120 parts of acid corrosive solution, 0.5 to 1.5 parts of alkaline corrosive solution, and 1 to 3 parts of hexadecyltrimethoxysilane. The preparation method of the hydrophobic friction-resistant semitransparent aluminum oxide film provided by the invention is short in reaction time, convenient in operation and low in cost; by a multi-time sintering method, the surface micropore structure of the film is increased; the dotted corrosion is realized, the large-area corrosion of the film is avoided, and by changing a mist spraying distance or regulating a liquid outlet amount, the corrosion degree can be effectively controlled; and the service life of the film can be effectively prolonged.

Description

technical field [0001] The invention relates to an aluminum oxide film, in particular to a preparation method of a hydrophobic and friction-resistant translucent aluminum oxide film. Background technique [0002] In the prior art, a layer of organic film with low surface energy is mainly coated on the surface of the film to achieve the hydrophobic effect. Usually, aluminum isopropoxide is used to make the sol, and the reaction time is 6-12 hours. The reaction time is long, and the price of aluminum isopropoxide is high; the spin coating method or the pulling method is mainly used, which is not suitable for materials with particularly large surface areas and irregular shapes. , and the amount of sol in the pulling method is particularly large, it is generally difficult to achieve single-sided coating; it is mainly a single-layer film; the hydrothermal method or acid-base corrosion method is used, that is, the entire film is invaded into water or corrosive solution to heat to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34C01F7/36
CPCC01F7/36C03C17/3411C03C2217/214C03C2217/78C03C2218/112C03C2218/32
Inventor 陈玲付飞娥
Owner YUNNAN OPEN UNIV
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