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Preparation method of hydrophobic friction-resistant semitransparent aluminum oxide film

A friction-resistant and translucent 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. The effect of shortening the production time and controlling the degree of corrosion

Inactive Publication Date: 2017-10-13
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 that aluminum sec-butoxide makes aluminum hydroxide sol may further comprise the steps:

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

[0026] 2) Preparation of the glass carrier: Take the fragments and wash them with 100ml of ethyl acetate, 100ml of 95% ethanol, and 100ml of deionized water in an ultrasonic instrument for 30min, and dry them for later use;

[0027] 3) Repeated coating: coating on glass carrier by spray method, drying at room temperature for 1 day, sintering in muffle furnace, initial temperature is set to 50°C, heating rate is 1°C / min, heat preservation at 200°C for 30min, heat preservation at 350°C 30min, heat preservation at 550°C for 3h, repeat coating 2-30 times, sintering 2-3...

Embodiment 2

[0031] The method that aluminum sec-butoxide makes aluminum hydroxide sol may further comprise the steps:

[0032] 1) Preparation of alumina sol: Add 49.2 g of aluminum sec-butoxide to 360 g of distilled water at 85°C, stir with magnetic force for 30 minutes, then adjust the pH to 2 with 12 ml of nitric acid, and stir magnetically at 85°C for 30 minutes to obtain alumina sol. The sol was aged for 5 days for use;

[0033] 2) Preparation of the glass carrier: Take the fragments and wash them with 100ml of ethyl acetate, 100ml of 95% ethanol, and 100ml of deionized water in an ultrasonic instrument for 30min, and dry them for later use;

[0034] 3) Repeated coating: coating on glass carrier by spray method, drying at room temperature for 1 day, sintering in muffle furnace, initial temperature is set to 50°C, heating rate is 1°C / min, heat preservation at 200°C for 30min, heat preservation at 350°C 30min, heat preservation at 550°C for 1h, repeat coating 2-30 times, sintering 2-30...

Embodiment 3

[0038] The method that aluminum sec-butoxide makes aluminum hydroxide sol may further comprise the steps:

[0039] 1) Preparation of alumina sol: Add 147.8 g of aluminum sec-butoxide to 1080 g of distilled water at 85°C, stir for 30 minutes with magnetic force, then adjust the pH to 2 with 18 ml of nitric acid, and stir magnetically for 30 minutes at 85°C to obtain alumina sol. The sol was aged for 5 days for use;

[0040] 2) Preparation of the glass carrier: Take the fragments and wash them with 100ml of ethyl acetate, 100ml of 95% ethanol, and 100ml of deionized water in an ultrasonic instrument for 30min, and dry them for later use;

[0041] 3) Repeated coating: coating on glass carrier by spray method, drying at room temperature for 1 day, sintering in muffle furnace, initial temperature is set to 50°C, heating rate is 1°C / min, heat preservation at 200°C for 30min, heat preservation at 350°C 30min, heat preservation at 550°C for 3h, repeat coating 2-30 times, sintering 2-...

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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 method for preparing a hydrophobic and friction-resistant translucent aluminum oxide film. Background technique [0002] In the prior art, an organic film with low surface energy is mainly coated on the surface of the film to achieve a hydrophobic effect. Aluminum isopropoxide is usually used to make sol, and the reaction time takes 6 to 12 hours. The reaction time is long, and the price of aluminum isopropoxide is high; the spin coating method 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...

Claims

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Application Information

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