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Method for preparing large-area micro-pit structure and superhydrophobic metal surface with mesh mask

A metal surface and micro-pit technology, which is applied to the preparation of large-area micro-pit structures on metal surfaces and the preparation of super-hydrophobic surfaces, can solve the problems of gas films that are difficult to maintain for a long time, and achieve a wide range of process applications. The effect of low cost and mature preparation technology

Active Publication Date: 2021-02-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under natural conditions, the bubbles will gradually dissolve in the liquid, and it is difficult to maintain a stable and uniform gas film for a long time

Method used

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  • Method for preparing large-area micro-pit structure and superhydrophobic metal surface with mesh mask
  • Method for preparing large-area micro-pit structure and superhydrophobic metal surface with mesh mask
  • Method for preparing large-area micro-pit structure and superhydrophobic metal surface with mesh mask

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] refer to figure 2 , according to the following steps to prepare a large-area micro-pit structure with superhydrophobic properties on a copper plane:

[0060] (1) Cover the metal surface with an organic material net (60 mesh, formed of nylon material), and apply tensile stress and compressive stress to the organic material net to make the organic material net closely adhere to the metal surface;

[0061] (2) heat-treating the sample obtained in step (1) to obtain an organic mask. The specific conditions of the heat treatment include: the temperature is 236.5°C, and the temperature is kept constant for 10 to 12 minutes; during the heating process, when the temperature rises above 225°C, the heating rate is adjusted to 1°C / min; the surface morphology of the obtained organic mask is as follows: Figure 5 , and its average pore diameter is about 213.8 μm;

[0062] (3) Electrochemical etching is carried out on the metal surface not covered by the organic mask, so as to obt...

Embodiment 2

[0065] refer to figure 2 , according to the following steps to prepare a large-area micro-pit structure with superhydrophobic properties on a copper plane:

[0066] (1) Cover the metal surface with an organic material net (60 mesh, formed of nylon material), and apply tensile stress and compressive stress to the organic material net to make the organic material net closely adhere to the metal surface;

[0067] (2) heat-treating the sample obtained in step (1) to obtain an organic mask. The specific conditions of the heat treatment include: the temperature is 236.5°C, and the temperature is kept constant for 10 to 12 minutes; during the heating process, when the temperature rises above 225°C, the heating rate is adjusted to 1°C / min; the surface morphology of the obtained organic mask is as follows: Figure 6 , with an average pore diameter of about 215.4 μm;

[0068] (3) Electrochemical etching is carried out on the metal surface not covered by the organic mask, so as to obt...

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Abstract

The invention discloses a method for preparing a large-area micro-pit structure and a super-hydrophobic metal surface with a mesh mask. The method includes: (1) applying an organic material net with a first predetermined aperture on the metal surface; (2) heat-treating the sample obtained in step (1), so as to melt the organic material net, thereby forming a net with the first predetermined aperture on the metal surface. Two organic masks with predetermined apertures; (3) etching the metal surface that is not covered by the organic mask, so as to obtain a micro-pit structure on the metal surface; Cleaning to remove the organic mask and obtain a metal surface with a micro-pit structure. The method can efficiently prepare a large-area micro-pit structure metal surface, and a large-area super-hydrophobic metal surface can be obtained by etching the micro-pit structure with a specific structure.

Description

technical field [0001] The invention relates to the technical field of micro special processing, in particular, the invention relates to a preparation process for preparing a large-area micro-pit structure and a surface with super-hydrophobic properties on a metal surface. Background technique [0002] The large-area micro-pit structure on the metal surface has application value in many aspects such as cell filtration and screening, oil storage on the friction surface of sliding bearings, etc. The methods such as template deposition method, chemical etching method, and array electrode electromachining are commonly used in the batch preparation of metal surface array microstructures. The template deposition method is to first make an organic material template that matches the required microstructure and spread it on the flat plate, and then grow metal on the flat plate through the deposition process. During the growth process, the metal will fill the area that is not blocked ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/02C25F3/14
Inventor 佟浩李俊杰李勇普玉彬
Owner TSINGHUA UNIV
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