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Metal super-hydrophobic surface and preparation method thereof

A super-hydrophobic surface and metal technology, which is applied in the field of metal super-hydrophobic surface and its preparation, can solve the problem of weak friction resistance of super-hydrophobic surface, and achieve the effect of simple and controllable electroplating process, low cost, and resistance to freezing water resistance

Inactive Publication Date: 2014-07-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past superhydrophobic surface preparation methods, the prepared superhydrophobic surface has weak friction resistance, and the superhydrophobic surface with weak friction resistance is difficult to have practical industrial application value

Method used

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  • Metal super-hydrophobic surface and preparation method thereof
  • Metal super-hydrophobic surface and preparation method thereof
  • Metal super-hydrophobic surface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Polish the brass sheet with 400 mesh and 800 mesh sandpaper, rinse it with pure water, dry it, and use it as the cathode, and use the same size brass sheet as the anode. -1 Nickel sulfate, 50g?l -1 Nickel chloride hexahydrate and 45g?l -1 Electroplating is carried out in the Watts electroplating solution of boric acid, and the electroplating current density is 0.5A?cm -2 , the electroplating temperature is 50°C, and the electroplating time is 60 min. After the electroplating is completed, the workpiece is taken out, washed with water, and dried.

[0036] Place the electroplated workpiece together with 5% heptadecafluorodecyltriethoxysilane ethanol solution in an oven, heat treatment at 100°C for 60 min, take out the sample after heat treatment, and test its hydrophobicity, corrosion resistance and friction resistance Performance, the results are shown in Table 1, and its contact angle diagram is shown in figure 1 shown.

[0037]

Embodiment 2

[0039] Polish the brass sheet with 400 mesh and 800 mesh sandpaper, rinse it with pure water, dry it, and use it as the cathode, and use the same size brass sheet as the anode. -1 Nickel sulfate, 50g?l -1 Nickel chloride hexahydrate and 45g?l -1 Electroplating is carried out in the Watts electroplating solution of boric acid, and the electroplating current density is 0.3A?cm -2 , the electroplating temperature is 30°C, and the electroplating time is 30 min. After the electroplating is completed, the workpiece is taken out, washed with water, and dried.

[0040] Place the electroplated workpiece together with 1% heptadecafluorodecyltriethoxysilane ethanol solution in an oven, and heat-treat at 120°C for 30 minutes. After heat-treatment, take out the sample and test its hydrophobicity, corrosion resistance and friction resistance Performance, the results are shown in Table 1, and its contact angle diagram is shown in figure 2 shown.

Embodiment 3

[0042] Polish the aluminum sheet with 400 mesh and 800 mesh sandpaper, rinse it with pure water, dry it, and use it as the cathode, and use the same size brass sheet as the anode. -1 Nickel sulfate, 50g?l -1 Nickel chloride hexahydrate and 45g?l -1 Electroplating was carried out in the Watts electroplating solution of boric acid, and the electroplating current density was 0.4 A?cm -2 , the electroplating temperature is 50°C, and the electroplating time is 40 min. After the electroplating is completed, the workpiece is taken out, washed with water, and dried.

[0043] Place the electroplated workpiece together with the ethanol solution of heptadecafluorodecyltriethoxysilane with a concentration of 10% by volume in an oven, heat treatment at 150°C for 10 minutes, take out the sample after heat treatment, and test its hydrophobicity, corrosion resistance and friction resistance Performance, the results are shown in Table 1, and its contact angle diagram is shown in image 3 s...

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Abstract

The invention relates to a metal super-hydrophobic surface and a preparation method thereof. The preparation method comprises following two steps: firstly, electroplating method is adopted, traditional Watts electroplate liquid is taken as a base electroplate liquid, conductive metal base materials such as stainless steel, copper, aluminium alloy, and magnesium aluminum alloy, are taken as a negative electrode, and copper sheets are taken as a positive electrode so as to prepare a nickel coating layer; and secondly, an obtained electroplated surface and an ethanol solution containing fluorosilane are delivered into a heating furnace for heat treatment, and an obtained sample is subjected to washing and blow drying so as to obtain the surface with super-hydrophobicity on metal workpieces. The preparation method of the metal super-hydrophobic surface is simple; cost is low; and the preparation method is convenient for industrialized application. Contact angle of the obtained metal super-hydrophobic surface is more than 155 DEG, and rolling angel is less than 10 DEG; the metal super-hydrophobic surface possesses excellent super hydrophobicity, self-cleaning performance, wear resistance, and corrosion resistance; the preparation method is suitable for obtaining the metal super-hydrophobic surfaces with super hydrophobicity, self-cleaning performance, wear resistance, and corrosion resistance on the surfaces of a plurality of metal base materials with complex shapes and large area.

Description

technical field [0001] The invention relates to a method for obtaining a super-hydrophobic surface on the surface of metal substrates with different shapes. The obtained super-hydrophobic surface not only has very good super-hydrophobic and self-cleaning functions, but also has excellent wear-resistant and anti-corrosion functions. Background technique [0002] A superhydrophobic surface refers to a surface with a contact angle with water greater than 150°. Due to the special wetting properties of the superhydrophobic surface, it can be used in waterproof, anti-fog, anti-fouling, anti-icing, self-cleaning of industrial equipment and buildings, self-cleaning and anti-flashover of high-voltage electrical equipment, biomedicine and bionics There are many potential application prospects in material application, pipeline waterproof and anti-corrosion, fluid drag reduction and energy saving, power transmission towers and cables in winter anti-ice and snow. When the rolling angle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12C25D5/50
Inventor 苏峰华姚凯
Owner SOUTH CHINA UNIV OF TECH
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