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Preparation method of ZnO/AAO composite film with hydrophobic/super-hydrophobic performance

A composite film and super-hydrophobic technology, which is applied in the field of ZnO/AAO composite film preparation, can solve the problem of aluminum surface height, achieve high repeatability, uniform and pollution-free production process

Active Publication Date: 2020-11-27
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]Aluminum is abundant in nature, and because of its unique ductility, high specific strength and good electrical conductivity, it is widely used in various fields, especially It is used in aviation manufacturing, transportation and construction industries, but the surface of aluminum is relatively active, and it will fail due to long-term exposure to humid atmosphere or corrosion in corrosive media during use, so it must be used in practical applications. surface treatment

Method used

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  • Preparation method of ZnO/AAO composite film with hydrophobic/super-hydrophobic performance
  • Preparation method of ZnO/AAO composite film with hydrophobic/super-hydrophobic performance
  • Preparation method of ZnO/AAO composite film with hydrophobic/super-hydrophobic performance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1: Aluminum substrate degreasing treatment

[0043] Ultrasonic cleaning was performed on the aluminum sheet to remove surface oil, and the sample was dried in distilled water and ethanol for 5 minutes after ultrasonic cleaning;

[0044] Step 2: Aluminum substrate polishing treatment

[0045] First prepare the electrolytic polishing solution, pour 400mL of absolute ethanol (analytical pure) and 100mL of perchloric acid (analytical pure) into a beaker, mix them together and stir evenly; secondly, fix the aluminum substrate obtained in step 1 on the reaction device For the anode, fix the 316L steel sheet on the cathode, immerse in the newly prepared electrolytic polishing solution, then place the beaker on the magnetic stirrer, and confirm that the reaction area between the aluminum sample (10mm*15mm*0.2mm) and the steel sheet is 1: 100; the temperature is controlled at 0°C; the constant voltage mode is used, the electropolishing power supply voltage is set at 18V, a...

Embodiment 2

[0057] Step 1: Aluminum substrate degreasing treatment

[0058] Ultrasonic cleaning was performed on the aluminum sheet to remove surface oil, and the sample was dried in distilled water and ethanol for 8 minutes after ultrasonic cleaning;

[0059] Step 2: Aluminum substrate polishing treatment

[0060] First prepare the electrolytic polishing solution, pour 400mL of absolute ethanol (analytical pure) and 100mL of perchloric acid (analytical pure) into a beaker, mix them together and stir evenly; secondly, fix the aluminum substrate obtained in step 1 on the reaction device For the anode, fix the 316L steel sheet on the cathode, immerse in the newly prepared electrolytic polishing solution, then place the beaker on the magnetic stirrer, and confirm that the reaction area between the aluminum sample (10mm*15mm*0.2mm) and the steel sheet is 1: 100; the temperature is controlled at 0°C; the constant voltage mode is used, the electropolishing power supply voltage is set at 18V, a...

Embodiment 3

[0072] Step 1: Aluminum substrate degreasing treatment

[0073] Ultrasonic cleaning was carried out on the aluminum sheet to remove surface oil, and the sample was dried in distilled water and ethanol for 10 minutes after ultrasonic cleaning;

[0074] Step 2: Aluminum substrate polishing treatment

[0075] First prepare the electrolytic polishing solution, pour 400mL of absolute ethanol (analytical pure) and 100mL of perchloric acid (analytical pure) into a beaker, mix them together and stir evenly; secondly, fix the aluminum substrate obtained in step 1 on the reaction device For the anode, fix the 316L steel sheet on the cathode, immerse in the newly prepared electrolytic polishing solution, then place the beaker on the magnetic stirrer, and confirm that the reaction area between the aluminum sample (10mm*15mm*0.2mm) and the steel sheet is 1: 100; the temperature is controlled at 0°C; the constant voltage mode is used, the electropolishing power supply voltage is set at 18V...

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Abstract

The invention relates to a preparation method of a ZnO / AAO composite film with hydrophobic / super-hydrophobic performance. The preparation method comprises the following steps that firstly, an aluminumoxide film is directly prepared on an aluminum substrate by an anodic oxidation method, specifically, oil removal treatment is carried out on the aluminum substrate, the aluminum substrate is polished, and the aluminum oxide film with or without a fiber-covered porous structure is prepared; and then the zinc oxide composite film is generated on the anodic aluminum oxide through a hydrothermal method. According to the preparation method of the ZnO / AAO composite film with the hydrophobic / super-hydrophobic performance, surface treatment is carried out on the aluminum substrate by adopting the anodic oxidation and hydrothermal methods to obtain a ZnO / AAO composite film, by adjusting the hydrothermal time, the morphology of the surface of the ZnO / AAO composite film can be regulated and controlled, and the ZnO / AAO composite film with the super-hydrophobic performance can be finally obtained; and the water contact angle can reach 160 degrees under the condition of no ground surface energy modification, and the manufacturing process is uniform, free of pollution and high in repeatability.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment methods, and in particular relates to a method for preparing a ZnO / AAO composite film with hydrophobic / superhydrophobic properties. Background technique [0002] Aluminum is abundant in nature, and because of its unique ductility, high specific strength and good electrical conductivity, it is widely used in various fields, especially in aviation manufacturing, transportation and construction industries, but the surface of aluminum is relatively The activity is high, and it will fail due to long-term exposure to humid atmosphere or corrosion in corrosive media during use, so its surface must be treated in practical applications. In recent years, inspired by the "lotus leaf effect", many researchers have conducted a lot of research on hydrophobic / superhydrophobic surfaces. A hydrophobic surface refers to a surface with a contact angle greater than 90° but less than 150°, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12C25D11/04C23C28/04
CPCC23C18/1216C23C18/1295C25D11/045C23C28/04
Inventor 杨淑王洁任鹏荣
Owner XIAN UNIV OF TECH