Preparation method for bionic super-hydrophobic graphene thin film on aluminum alloy surface

A graphene film and aluminum alloy surface technology, applied in metal material coating process, gaseous chemical plating, coating, etc., can solve the problems of chloride ion corrosion and limit the application of aluminum alloy, and achieve high reproducibility and high Stability and durability, effect of uniform hydrophobic structure

Active Publication Date: 2015-11-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface of aluminum alloy is easily corroded by chloride ions in neutral solution, which limits the application of aluminum alloy.

Method used

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  • Preparation method for bionic super-hydrophobic graphene thin film on aluminum alloy surface
  • Preparation method for bionic super-hydrophobic graphene thin film on aluminum alloy surface
  • Preparation method for bionic super-hydrophobic graphene thin film on aluminum alloy surface

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Experimental program
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Embodiment 1

[0047] A method for preparing a biomimetic superhydrophobic graphene film on an aluminum alloy surface, specifically comprising the following steps:

[0048]Aluminum alloy machining: choose 2024 aluminum alloy as the substrate, and perform bionic microstructure processing on the surface of the aluminum alloy. First, the aluminum alloy substrate was cut into splines with a size of 15×15×1 mm. Next, the surface of the cut aluminum alloy is polished with 400-2000 mesh sandpaper, in order to remove the oxide layer on the surface. Then, it was polished and cleaned ultrasonically in absolute ethanol for 10 min, and finally dried in a vacuum oven at 80°C for 2 h. Finally, using mechanical processing technology, an array of cylindrical convex hull structures is processed on the surface of the aluminum alloy. The diameters of the cylindrical convex hulls are 100 μm and 250 μm, the height of the convex hulls is 10 μm, and the distance between adjacent convex hulls is 200 μm and 350 μm....

Embodiment 2

[0053] A method for preparing a biomimetic superhydrophobic graphene film on an aluminum alloy surface, specifically comprising the following steps:

[0054] Aluminum alloy machining: choose 2024 aluminum alloy as the substrate, and perform bionic microstructure processing on the surface of the aluminum alloy. First, the aluminum alloy substrate was cut into splines with a size of 15×15×1 mm. Next, the surface of the cut aluminum alloy is polished with 400-2000 mesh sandpaper, in order to remove the oxide layer on the surface. Then, it was polished and cleaned ultrasonically in absolute ethanol for 10 min, and finally dried in a vacuum oven at 80°C for 2 h. Finally, using mechanical processing technology, an array of cylindrical convex hull structures is processed on the surface of the aluminum alloy. The diameters of the cylindrical convex hulls are 100 μm and 250 μm, the height of the convex hulls is 10 μm, and the distance between adjacent convex hulls is 200 μm and 350 μm...

Embodiment 3

[0059] A method for preparing a biomimetic superhydrophobic graphene film on an aluminum alloy surface, specifically comprising the following steps:

[0060] Aluminum alloy machining: This patent selects the aluminum alloy of grade 2024 as the substrate, and performs bionic microstructure processing on the surface of the aluminum alloy. First, the aluminum alloy substrate was cut into splines with a size of 15×15×1 mm. Next, the surface of the cut aluminum alloy is polished with 400-2000 mesh sandpaper, in order to remove the oxide layer on the surface. Then, it was polished and cleaned ultrasonically in absolute ethanol for 10 min, and finally dried in a vacuum oven at 80°C for 2 h. Finally, using mechanical processing technology, an array of cylindrical convex hull structures is processed on the surface of the aluminum alloy. The diameters of the cylindrical convex hulls are 100 μm and 250 μm, the convex hull height is 10 μm, and the distance between adjacent convex hulls i...

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Abstract

The invention belongs to the field of metal material surface modification, and relates to a method for constructing bionic super-hydrophobic graphene on an aluminum alloy substrate. The method comprises the following steps of performing micro-structure machining on an aluminum alloy surface to prepare an array surface structure with a bionic convex-concave structure by adopting a surface machining technology; cleaning and removing an oxide film on the surface of a copper foil substrate; growing in situ graphene on the copper foil substrate by adopting a chemical vapor deposition method, removing the copper foil substrate by adopting a chemical etching method, and transferring the graphene onto the aluminum alloy surface. The method is simple, easy, high in reproducibility and durable; the prepared product has higher stability and durability under a room temperature condition; the method is significant for the use and the development of aluminum alloys in the future, and is of reference significance for the preparation of super-hydrophobic self-cleaning surfaces on other metal substrates; in addition, graphene can also be promoted to be widely applied.

Description

technical field [0001] The invention belongs to the field of surface modification of metal materials, and in particular relates to a method for constructing a bionic superhydrophobic graphene film on an aluminum alloy substrate. Background technique [0002] Aluminum alloy is widely used in modern industry because of its remarkable characteristics such as low density, easy processing, good anti-corrosion performance and high mechanical strength. However, the surface of aluminum alloy is easily corroded by chloride ions in neutral solution, which limits the application of aluminum alloy. Therefore, it is necessary to prepare aluminum alloy materials with surface superhydrophobic properties. On the one hand, the formation of superhydrophobic surface structure can improve the anti-corrosion properties of aluminum alloy and prolong the service life of aluminum alloy; on the other hand, it can extend the application range of aluminum alloy and endow aluminum alloy with character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/26C23C16/02
Inventor 刘燕郑再航白苑李淑一韩志武任露泉
Owner JILIN UNIV
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