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In-situ construction method and application of super-hydrophobic surface adopting micro/nano hierarchical structure

A technology of superhydrophobic surface and hierarchical structure, which can be used in devices for coating liquids on surfaces, special surfaces, pretreated surfaces, etc. It can solve the problems of low bonding strength, high production cost, and limit superhydrophobic materials, and achieve low cost. , the effect of short process cycle and broad application prospects

Active Publication Date: 2017-11-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the low bonding strength between the superhydrophobic surface microstructure and the matrix, as well as the high production cost, it is limited that superhydrophobic materials can be put into practical application in large quantities. Therefore, on the basis of existing research, a low-cost The in situ construction method of the hierarchical structure superhydrophobic surface is of great significance for the construction of superhydrophobic material surface microscopic morphology and the industrial application of superhydrophobic materials, especially in the field of anti-icing applications.

Method used

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  • In-situ construction method and application of super-hydrophobic surface adopting micro/nano hierarchical structure

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Embodiment 1

[0029] The preparation method of the superhydrophobic surface with micro-nano hierarchical structure of the present invention is as follows:

[0030] The first step is to use pure aluminum (99.6%) as the base material, and use wire cutting to process the base material into a size of 1mm×15mm×15mm, and use No. 1 to No. 6 metallographic sandpaper to polish the surface of the base material until there is no scratch under the naked eye and then ultrasonically cleaned in acetone, absolute ethanol and distilled water for 10 minutes, and dried for later use;

[0031] In the second step, using the electrochemical etching method, using the aluminum sheet as the anode and the platinum sheet as the cathode, the concentration of the NaCl electrolyte is 0.1mol / L, the voltage is 8V, and the etching time is 2.5h, to obtain micron-sized particles on the surface of the substrate. structure.

[0032] The 3rd step, utilize hydrothermal method, take reactor as reaction container, by placing the ...

Embodiment 2

[0036] The preparation method of the superhydrophobic surface with micro-nano hierarchical structure of the present invention is as follows:

[0037] The first step is to use pure aluminum (99.6%) as the base material, and use wire cutting to process the base material into a size of 1mm×15mm×15mm, and use No. 1 to No. 6 metallographic sandpaper to polish the surface of the base material until there is no scratch under the naked eye and then ultrasonically cleaned in acetone, absolute ethanol and distilled water for 10 minutes, and dried for later use;

[0038] In the second step, using the electrochemical etching method, using the aluminum sheet as the anode and the platinum sheet as the cathode, the concentration of the NaCl electrolyte is 0.08mol / L, the voltage is 6V, and the etching time is 2.5h, to obtain micron-sized particles on the surface of the substrate. structure.

[0039] The third step utilizes the hydrothermal method, with the reactor as the reaction vessel, by ...

Embodiment 3

[0043]The preparation method of the superhydrophobic surface with micro-nano hierarchical structure of the present invention is as follows:

[0044] The first step is to use pure aluminum (99.6%) as the base material, and use wire cutting to process the base material into a size of 1mm×15mm×15mm, and use No. 1 to No. 6 metallographic sandpaper to polish the surface of the base material until there is no scratch under the naked eye and then ultrasonically cleaned in acetone, absolute ethanol and distilled water for 10 minutes, and dried for later use;

[0045] In the second step, using the electrochemical etching method, using the aluminum sheet as the anode and the platinum sheet as the cathode, the NaCl electrolyte concentration is 0.12mol / L, the voltage is 4V, and the etching time is 1.5h, to obtain micron-sized particles on the surface of the substrate. structure.

[0046] The third step utilizes the hydrothermal method, with the reactor as the reaction vessel, by placing ...

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Abstract

The invention discloses an in-situ construction method and an application of a super-hydrophobic surface adopting a micro / nano hierarchical structure. Pure aluminum or an aluminum alloy is used as a matrix material, a micron-sized rough structure is firstly constructed on the metal matrix with a NaCl solution used as an electrolyte with an electrochemical etching method, then a nano-sized structure adopting a needle-ball-shaped structure is continuously etched on the surface of the existing micron-sized structure with an aluminum chloride hexahydrate and triethanolamine solution having certain concentration used as an etching solution with a hydrothermal method, then low-energy treatment is performed with heptadeca-fluoro silane, and the super-hydrophobic surface adopting the micro / nano hierarchical structure is obtained finally and has the surface contact angles larger than 155 degrees and the rolling angle smaller than 5 degrees. According to the method, the prepared super-hydrophobic surface adopting the micro / nano hierarchical structure has the great practical significance in promotion of morphology construction and industrial application of the super-hydrophobic surface, particularly in the anti-icing application field.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of metal substrates, and in particular relates to an in-situ construction method of a superhydrophobic surface with a micro-nano hierarchical structure and an anti-icing application. The prepared micro-nano hierarchical structure has important practical significance for promoting the construction of superhydrophobic surface morphology and the industrial application of superhydrophobic surfaces, especially in the field of anti-icing applications. Background technique [0002] Wettability is one of the important properties used to measure hydrophobic materials, and it plays a huge role in both nature and human life. Wettability is mainly determined by the chemical properties and microstructure of the solid surface, and is usually characterized by the contact angle of a liquid drop on a solid surface (including static contact angle, rolling angle, advancing angle, receding angle, etc.). It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D3/10C23F1/14C25F3/04
CPCB05D3/102B05D5/083B05D2350/35C23F1/14C25F3/04
Inventor 陶杰金明明沈一洲王冠宇谢月涵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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