Preparation method for super-hydrophobic metal surface

A metal surface, super-hydrophobic technology, applied in the field of super-hydrophobic metal surface preparation, can solve the problems of single applicable substrate, poor surface binding force, complicated and time-consuming process, etc., to achieve enhanced film-base binding force, good binding, and controllable The effect of many conditions

Inactive Publication Date: 2014-08-13
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above processes have disadvantages such as high cost, complex and time-consuming process, difficult control, poor stability, and single applicable substrate. Therefore, in order to meet the needs of industrial production and industrial applications, it is particularly important to develop a super-hydrophobic surface preparation method that is convenient, fast, versatile and stable.

Method used

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  • Preparation method for super-hydrophobic metal surface
  • Preparation method for super-hydrophobic metal surface
  • Preparation method for super-hydrophobic metal surface

Examples

Experimental program
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Effect test

Embodiment 1

[0037](1) Grind and polish the H62# brass plate with 800-mesh metallographic sandpaper to remove surface stains and defects, and then ultrasonically clean it with deionized water, acetone, 0.5mol / L dilute hydrochloric acid and deionized water for 5 minutes each.

[0038] (2) The pretreated brass plate is placed in a self-made electroplating tank (10cm×5cm×8cm) for constant current electroplating, the brass plate is used as the cathode plate, the red copper plate is used as the anode plate, and the plating solution is CuSO 4 ·5H 2 O and H 2 SO 4 The mixed solution, the concentration is: CuSO 4 ·5H 2 O125g / L, concentrated H 2 SO 4 55ml / L, current density 0.1A / cm 2 , the temperature is 26°C, the distance between the plates is 5cm, and the time is 20min.

[0039] (3) After the electroplating is completed, place the electroplated metal plate in deionized water and ultrasonically clean it for 5 minutes, and then place the plated area vertically along the wall surface under th...

Embodiment 2

[0042] (1) Grind and polish the H62# brass plate with 800-mesh metallographic sandpaper to remove surface stains and defects, and then ultrasonically clean it with deionized water, acetone, 1mol / L dilute hydrochloric acid and deionized water for 5 minutes each.

[0043] (2) Place the pretreated brass plate in a self-made electroplating tank (10cm×5cm×8cm) for pulse electroplating, the brass plate is used as the cathode plate, the red copper plate is used as the anode plate, and the plating solution is CuSO 4 ·5H 2 O180g / L, concentrated H 2 SO 4 50ml / L, the power supply is programmable DC power supply DP1116A (RIGOL), the loop current is controlled by electronic load IT8511 (ITECH), the current conversion cycle is 14s, and the current density in the first 8s of each cycle is 0.16A / cm 2 , the last 6s is 0.08A / cm 2 , the temperature is 25°C, the distance between the plates is 5cm, and the electroplating time is 20min.

[0044] (3) After the electroplating is completed, place ...

Embodiment 3

[0047] (1) The nickel plate was polished with 600-mesh metallographic sandpaper to remove surface stains and defects, and then ultrasonically cleaned with deionized water, ethanol, 1mol / L dilute hydrochloric acid and deionized water for 5 minutes each.

[0048] (2) Place the pretreated nickel plate in a self-made electroplating tank (10cm×5cm×8cm) pulse electroplating, the nickel plate is used as the cathode plate, the copper plate is used as the anode plate, and the plating solution is CuSO 4 ·5H 2 O160g / L, H 2 SO 4 60ml / L, the power supply is programmable DC power supply DP1116A (RIGOL), the loop current is controlled by electronic load IT8511 (ITECH), the current conversion cycle is 12s, and the current density in each cycle is 0.14A / cm for the first 7s 2 , the last 5s is 0.08A / cm 2 , the temperature is 28°C, the distance between the plates is 6cm, and the electroplating time is 18min.

[0049] (3) After the electroplating is completed, place the nickel plate in deioniz...

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Abstract

The invention discloses a preparation method for a super-hydrophobic metal surface. The method comprises the following steps: constructing a micrometer structure on the surface of a frequently used engineering material (such as copper, iron, stainless steel, nickel, aluminum, an aluminum alloy and a high-molecular section covering the above-mentioned metal through chemical plating) by using an electrocoppering process; then constructing a nanometer structure by using a chemical silvering process; and carrying out modification with low-surface energy substances like octadecanethiol so as to obtain excellent and stable super-hydrophobicity. The method has a wide application scope and can be used on pure metal, alloys and metalized high-molecular sections; an obtained surface has stable and reliable surface performance, strong film-substrate bonding force and good corrosion resistance, especially good acid resistance, can be extensively applied in fields like self-cleaning, water prevention and dehumidification, corrosion prevention, fluid drag reduction, frost prevention and condensation and heat exchange, and has an industrialization value.

Description

technical field [0001] The invention belongs to the field of surface modification of a material matrix, and in particular relates to a preparation method of a superhydrophobic metal surface. Background technique [0002] Surface wettability is an important physical property of engineering materials, and its quality determines the application field of the material to some extent. The degree of wettability of a liquid on a solid surface can be judged by the contact angle, which is the angle between the liquid / gas interface and the solid surface (including the liquid phase). A superhydrophobic surface refers to a surface with a static contact angle (CA) greater than 150° and a rolling angle (SA) less than 10°, because it is self-cleaning, waterproof and dehumidifying, anti-corrosion and oxidation-resistant, anti-icing and frosting, fluid transport and drag reduction. , heat transfer enhancement and other aspects have been widely used and have attracted much attention. The sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/38C23C18/44C23F17/00
Inventor 张谦曹凯陈福明吴思国王丹丹
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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