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Super hydrophobic surface possessing dual microtexture and preparation method

A superhydrophobic surface, microstructure technology, applied in microstructure devices, manufacturing microstructure devices, microstructure technology, etc., can solve problems such as insufficient improvement of fluid flow performance, achieve environmental protection, and reduce the use of detergents , the effect of reducing air resistance

Inactive Publication Date: 2007-06-27
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using this method only nano-scale arrays are obtained, but not micro-scale arrays, which cannot fully improve the flow performance of fluids in microfluidic channels.

Method used

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  • Super hydrophobic surface possessing dual microtexture and preparation method
  • Super hydrophobic surface possessing dual microtexture and preparation method
  • Super hydrophobic surface possessing dual microtexture and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 A method for making a super-hydrophobic surface with a double microstructure, comprising the following steps

[0030] (1) Select a piece of aluminum sheet with a purity of 99.999%, with an area of ​​50mm × 50mm and a thickness of 0.5mm, and adopt a common laser processing method to obtain a micron-scale array 3 on the aluminum sheet, and the length a of the microcolumn in the micron-scale array 3 , width b, and height c are all 10 μm, and the spacing d between each microcolumn is 10 μm, as shown in Figure 3;

[0031] (2) The surface of the aluminum sheet with the micron-scale array 3 is used as the anode, and the nickel sheet is used as the cathode, and the porous aluminum oxide nanohole array 4 is produced by the usual anodic oxidation method. The depth e of the holes in the nanohole array 4 is 10 nm, and the aperture f is 10nm, the distance g between the holes is 10nm, the electrolyte for anodic oxidation is 0.3mol / L oxalic acid solution, the applied volt...

Embodiment 2

[0034] Embodiment 2 A method of making a super-hydrophobic surface with a double microstructure, comprising the following steps

[0035] (1) Select a piece of aluminum sheet with a purity of 99.99%, the area is 50mm * 50mm, and the thickness is 0.5mm. Adopt the usual ion etching method to obtain the micron-scale array 3 on the aluminum sheet, and the length of the microcolumn in the micron-scale array 3 a, width b, and height c are all 50 μm, and the distance d between each microcolumn is 60 μm;

[0036] (2) The surface of the aluminum sheet with the micron-scale array 3 is used as the anode, and the nickel sheet is used as the cathode, and the porous aluminum oxide nanohole array 4 is produced by the usual anodic oxidation method. The depth e of the holes in the nanohole array 4 is 25 nm, and the aperture f is 20nm, the distance g between the holes is 15nm, the electrolyte for anodic oxidation is 0.5mol / L oxalic acid solution, the applied voltage is 40V, the temperature is 2°...

Embodiment 3

[0039] Embodiment 3 A method of making a superhydrophobic surface with a double microstructure, comprising the following steps

[0040] (1) Select a piece of aluminum sheet with a purity of 99.999%, with an area of ​​50mm × 50mm and a thickness of 0.5mm, and adopt a common wet etching method to obtain a micron-scale array 3 on the aluminum sheet, and the length of the microcolumn in the micron-scale array 3 a, width b, and height c are all 100 μm, and the distance d between each microcolumn is 100 μm;

[0041] (2) The surface of the aluminum sheet with the micron-scale array 3 is used as the anode, and the nickel sheet is used as the cathode, and the porous aluminum oxide nanohole array 4 is produced by the usual anodic oxidation method. The depth e of the holes in the nanohole array 4 is 50nm, and the aperture f is 30nm, the distance g between the holes is 40nm, the electrolyte for anodic oxidation is 0.5mol / L sulfuric acid solution, the applied voltage is 30V, the temperatur...

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Abstract

A superhydrophobic surface with dual microscopic structures features that the micron-class arrays and nano-class arrays are prepared on the surface of polymer film through microprocessing and anodizing. The length, width, height and gap of microposts in array are 10-100 microns for micron array and 10-100 nm for nano-array. Its template can be cyclically used.

Description

technical field [0001] The invention relates to a method for making a super-hydrophobic surface. Background technique [0002] In recent years, countries all over the world have given great enthusiasm and attention to micro-electromechanical systems (MEMS). It is becoming a newly emerging large-scale industry, a new growth point of the national economy, and has a major impact on the development of national defense technology. However, with the miniaturization of devices and systems, the feature scale decreases, and the surface area (L 2 ) and volume (L 3 ) ratio is also relatively increased, the surface effect is enhanced, and the surface force that has been neglected in the macro scale will play a dominant role at this time, resulting in a series of problems such as surface friction, wear, adhesion and pressure loss, making MEMS devices The production and application have been greatly troubled. [0003] German biologist W.Barthlott and others observed with a scanning ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81B7/00B82B1/00B81C1/00B82B3/00
Inventor 张鸿海范细秋贾可马斌江小平刘胜甘志银汪学方
Owner HUAZHONG UNIV OF SCI & TECH
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