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Preparation method of metal-based super-hydrophobic surface

A hydrophobic surface and metal-based technology, which is applied to the device for coating liquid on the surface, special surface, coating, etc., can solve the problems of special processing equipment, harsh preparation conditions, and complicated process, and achieve simple and easy preparation process , low production cost, safe and reliable preparation process

Inactive Publication Date: 2015-08-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are various methods for preparing metal-based superhydrophobic surfaces, such as: chemical vapor deposition, electrochemical deposition, polyelectrolyte alternating deposition, anodic oxidation, plasma, chemical etching, etc., but most methods exist Due to the harsh conditions, special processing equipment or complicated process, it is still necessary to explore the preparation method of metal-based superhydrophobic surface with low cost, simple process and excellent performance.

Method used

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  • Preparation method of metal-based super-hydrophobic surface
  • Preparation method of metal-based super-hydrophobic surface
  • Preparation method of metal-based super-hydrophobic surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1, preparation aluminum-based superhydrophobic surface

[0046] Prepare the aluminum-based superhydrophobic surface according to the following steps:

[0047] (1) Use metallographic sandpaper with a particle size of 500 mesh to grind the aluminum sheet evenly and meticulously. After the grinding is completed, immerse the aluminum sheet in anhydrous ethanol and deionized water for 5 minutes for ultrasonic cleaning to remove impurities and oil on the surface;

[0048] (2) Immerse the aluminum sheet treated in step (1) into the prepared mixed solution A of 0.05mol / L hydrochloric acid and 0.1mol / L copper nitrate for etching and replacement reaction. After immersion for 10 minutes, the surface Take it out and rinse the surface with deionized water to wash away soluble salts and shallower solid reactants;

[0049] (3) Immerse the aluminum sheet treated in step (2) into the prepared 1wt% fluorosilane solution (F-1060) for modification for 30 minutes;

[0050] (4) ...

Embodiment 2

[0053] Embodiment 2, prepare copper-based superhydrophobic surface

[0054] (1) Use metallographic sandpaper with a particle size of 500 mesh to uniformly and meticulously polish the copper sheet. After the polishing is completed, immerse the copper sheet in anhydrous ethanol and deionized water for 5 minutes for ultrasonic cleaning to remove surface impurities and oil stains;

[0055] (2) Immerse the copper sheet treated in step (1) into the prepared mixed solution B of 4.0mol / L nitric acid and 0.02mol / L silver nitrate for etching and replacement reaction. After immersion for 10min, take out the surface , and rinse the surface with deionized water to wash off soluble salts and shallower solid reactants;

[0056] (3) Immerse the copper sheet treated in step (2) into the prepared 1wt% fluorosilane solution (F-1060) for modification for 30 minutes;

[0057] (4) Put the copper sheet modified in step (3) into an oven, dry at 100°C for 30 minutes, and cool to room temperature afte...

Embodiment 3

[0060] Embodiment 3, preparation aluminum-based superhydrophobic surface

[0061] Prepare the aluminum-based superhydrophobic surface according to the following steps:

[0062] (1) Use metallographic sandpaper with a particle size of 1000 mesh to uniformly and meticulously polish the aluminum sheet. After the grinding is completed, immerse the aluminum sheet in anhydrous ethanol and deionized water for 5 minutes for ultrasonic cleaning to remove impurities and oil stains on the surface;

[0063] (2) Immerse the aluminum sheet treated in step (1) into the prepared mixed solution A of 0.1mol / L hydrochloric acid and 0.1mol / L copper nitrate for etching and replacement reaction. After immersion for 5 minutes, take out the surface , and rinse the surface with deionized water to wash off soluble salts and shallower solid reactants;

[0064] (3) Immerse the aluminum sheet treated in step (2) into the prepared 1wt% fluorosilane solution (F-1060) for modification for 30 minutes;

[00...

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Abstract

The invention discloses a preparation method of a metal-based super-hydrophobic surface. The preparation method comprises the following steps: (1) immersing a metal-based surface into an acid-salt mixed solution which comprises an acid, a metal salt and water, wherein metal in a metal base is subjected to a displacement reaction with the metal salt and is subjected to etching with the acid; (2) immersing the metal-based surface treated through the step (1) into a surface modification solution which is a perfluorosilane aqueous solution; and (3) drying and cooling the metal-based surface treated through the step (2), thus obtaining the metal-based super-hydrophobic surface. The metal-based super-hydrophobic surface prepared by using the method disclosed by the invention has excellent super-hydrophobic performance; the preparation process is simple and easy to carry out; the preparation course is safe and reliable; the preparation cycle is short; no expensive equipment or material is needed; the preparation cost is low; and a relatively good industrial application prospect is achieved.

Description

technical field [0001] The invention relates to a surface treatment method, in particular to a method for preparing a metal-based super-hydrophobic surface. Background technique [0002] In recent years, superhydrophobic surfaces (with a static contact angle greater than 150° and a rolling angle less than 10°) have attracted extensive research interest. Since the droplets on the superhydrophobic surface have the characteristics of large contact angle, small contact area, and easy rolling of the droplets, it has great advantages in self-cleaning, anti-fog and anti-frost, anti-corrosion resistance, microfluidic chips and non-destructive liquid output. It shows a very attractive application prospect. [0003] Metal is an indispensable basic material for national economic development, and it is widely used in aerospace, machinery manufacturing, construction industry, national defense industry and chemical industry and other fields. However, commonly used metal surfaces have ma...

Claims

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Application Information

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IPC IPC(8): C23F1/16C23C18/31B05D5/08
Inventor 吴晓敏褚福强
Owner TSINGHUA UNIV
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