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A superamphiphobic metal surface with three-dimensional distribution of nanostructures and its preparation method

A nanostructure and metal surface technology, applied in metal processing equipment, metal material coating technology, manufacturing tools, etc., to achieve the effect of increasing growth area, good durability, and excellent super-amphiphobic performance

Active Publication Date: 2020-09-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported superamphiphobic surfaces have not yet solved the problem of durability well.

Method used

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  • A superamphiphobic metal surface with three-dimensional distribution of nanostructures and its preparation method
  • A superamphiphobic metal surface with three-dimensional distribution of nanostructures and its preparation method
  • A superamphiphobic metal surface with three-dimensional distribution of nanostructures and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Concrete preparation method of the present invention comprises the steps:

[0032] 1) Pretreatment of the metal substrate: After the metal substrate is machined and polished, it is cleaned in ethanol and acetone in sequence, and then dried with nitrogen gas flow;

[0033] 2) Construction of a regular microcone array structure on the surface of the metal substrate: use a high-power ultrafast laser to perform selective pattern ablation on the surface of the metal substrate, such as using a femtosecond laser to scan according to the pattern of vertical intersections; The distance between adjacent scanning paths is 30-100 μm, and the total area of ​​the pattern is 0.01-10,000 mm2 to form a highly ordered micro-cone array structure. Then the sample is ultrasonically cleaned in ethanol and acetone, and then dried with nitrogen gas flow deal with;

[0034] 3) Constructing the nano-grass structure on the surface of the micro-array structure: the metal substrate with the micro-...

Embodiment 1

[0037] Example 1: A durable copper-based superamphiphobic hierarchical structure surface with three-dimensional distribution of nanostructures prepared by femtosecond laser ablation and chemical bath oxidation composite method:

[0038] 1) Cut the copper substrate into a copper block with a size of 10mm×10mm×3mm, and use No. 200, No. 400, No. 800, No. 1000, and No. 1500 metallographic sandpaper to polish the surface of the copper substrate in turn, and then polish it deal with. The copper blocks were then ultrasonically cleaned in ethanol, acetone, and then dried using a gentle stream of nitrogen gas.

[0039] 2) A high-power femtosecond laser is used to perform selective pattern ablation on the surface of the copper substrate. The laser wavelength is 1030nm, the pulse width is 800fs, the pulse repetition frequency is 200kHz, and the laser power is 6W. The scanning pattern is a vertical intersection, the distance between adjacent scanning paths is 40 μm, the scanning speed is...

Embodiment 2

[0044] Example 2 Preparation of durable aluminum-based superamphiphobic hierarchical structure surface with three-dimensional nanostructure distribution by femtosecond laser ablation and chemical bath oxidation composite method

[0045] 1) Cut the aluminum substrate into an aluminum block with a size of 10mm×10mm×3mm, and use No. 200, No. 400, No. 800, No. 1000, and No. 1500 metallographic sandpaper to polish the surface of the aluminum substrate in turn, and then polish it deal with. Then the aluminum block was ultrasonically cleaned in ethanol and acetone in turn, and then dried with a gentle nitrogen stream after taking it out.

[0046] 2) A high-power femtosecond laser is used to selectively pattern and ablate the surface of the aluminum substrate. The laser wavelength is 1030nm, the pulse width is 800fs, the pulse repetition frequency is 200kHz, and the laser power is 4W. The scanning pattern is a vertical intersection, the distance between adjacent scanning paths is 40 ...

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Abstract

The invention discloses a nano-structure three-dimensional distributed super-amphiphobic metal surface and a preparation method thereof and belongs to the technical field of function materials. The super-amphiphobic surface is of a nano grass-shaped structure formed by mutually winding flexible thin nano ribbon-shaped units distributed on the surface of a three-dimensional micrometer array structure which is distributed on a metal substrate. The preparation method comprises the steps that the surface of the metal substrate is subjected to patterning erosion through ultrafast laser to form thethree-dimensional micrometer structure at first, then, the nano grass-shaped structure is formed on the surface of the three-dimensional micrometer structure through chemical bath oxidization, surfacemodification treatment is conducted through (Heptadecafluoro-1,1,2,2-tetradecyl)trimethoxysilane, and the super-hydrophobic super-oleophobic function is achieved. The super-amphiphobic surface has excellent durability, the preparation method of the super-amphiphobic surface is simple, easy to implement, fast, efficient and capable of achieving large-area preparation, the self cleaning performancecan be maintained for a long time under the outdoor environment and other multiple outside environments, and the super-amphiphobic metal surface has wide application prospects in the fields of national defense, industrial production, daily life and the like.

Description

technical field [0001] The invention relates to a superamphiphobic (simultaneously superhydrophobic and superoleophobic) surface with good durability and its preparation method, in particular to a durable superamphiphobic metal surface with three-dimensional distribution of nanostructures and its laser and chemical composite The preparation method belongs to the technical field of functional materials. Background technique [0002] Surfaces with special wettability have attracted much attention because of their interesting phenomena and wide application prospects. Among these special wetting surfaces, superhydrophobic surfaces are the most classic field and have been studied for decades. At present, the mechanism behind the superhydrophobic surface has been relatively maturely studied and elucidated, that is, the low free energy surface components and the micro-nano composite surface structure are two key factors to achieve superhydrophobicity and self-cleaning function. R...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23K26/00B23K26/352B23K26/362B23K26/60C23C22/60
CPCB23K26/352B23K26/361B23K26/60B23P15/00C23C22/60
Inventor 钟敏霖张红军韩金鹏
Owner TSINGHUA UNIV
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