Preparation method of super-hydrophobic coating layer on aluminum surface

A super-hydrophobic coating, aluminum surface technology, applied in the device, coating, special surface and other directions of coating liquid on the surface, can solve the problem that the micro-nano composite structure cannot be etched on the surface of aluminum sheet, and the reaction conditions of chemical etching method are difficult. control, the surface superhydrophobicity effect is not obvious and other problems, to achieve the effect of excellent hydrophobicity, good practical value, excellent superhydrophobicity and hydrophobicity

Active Publication Date: 2016-04-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, due to the difficulty in controlling the reaction conditions of the chemical etching method, it is generally impossible to etch a fine micro-nano composite structure on the surface of the aluminum sheet. If the etching time is too short, the ideal roughness will not be achieved due to insufficient etching. If it is too long, due to excessive reaction, generally only micron-scale roughness can be formed, and the super-hydrophobic effect of the obtained surface is not obvious

Method used

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  • Preparation method of super-hydrophobic coating layer on aluminum surface
  • Preparation method of super-hydrophobic coating layer on aluminum surface

Examples

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Effect test

example 1

[0024] 1. Polish the aluminum sheet with sandpaper, ultrasonically clean it with acetone and ethanol for 10 minutes, and then wash it with distilled water to remove the oil on the surface of the aluminum sheet, and dry it in an oven at 100°C.

[0025] 2. Put the clean aluminum sheet into 3mol / L hydrochloric acid solution and etch it for 20min at room temperature, then take out the aluminum sheet and wash it with a large amount of distilled water to stop the reaction. Dry in an oven after ultrasonic cleaning.

[0026] 3. Immerse the aluminum sheet obtained in step 2 into nano-TiO with a particle size of 100nm and 1wt%. 2 in the ethanol solution for 2 min, and reacted in the muffle furnace at 300°C for 3 h after taking it out, and the nano-TiO 2 grafted onto the aluminum surface.

[0027] 4. The aluminum sheet in step 3 was dip-coated in 0.5wt% tridecafluorooctyltriethoxysilane ethanol solution for 1 hour, and cured at 150° C. for 3 hours after taking it out to obtain a super-...

example 2

[0030] 1. Polish the aluminum sheet with sandpaper, ultrasonically clean it with acetone and ethanol for 10 minutes, and then wash it with distilled water to remove the oil on the surface of the aluminum sheet, and dry it in an oven at 100°C.

[0031] 2. Put the clean aluminum sheet into 3mol / L hydrochloric acid solution and etch it for 20min at room temperature, then take out the aluminum sheet and wash it with a large amount of distilled water to stop the reaction. Dry in an oven after ultrasonic cleaning.

[0032] 3. Dip-coat the aluminum sheet in step 2 in 1wt% tridecafluorooctyltriethoxysilane ethanol solution for 1 hour, take it out and cure at 150°C for 3 hours to obtain a super-hydrophobic coating.

[0033] The static contact angle of water, the rolling angle test, the anti-frost and anti-icing test and the mechanical stability test were carried out on it, and the results are shown in Table 1.

example 3

[0035] 1. Polish the aluminum sheet with sandpaper, ultrasonically clean it with acetone and ethanol for 10 minutes, and then wash it with distilled water to remove the oil on the surface of the aluminum sheet, and dry it in an oven at 100°C.

[0036] 2. Put the clean aluminum sheet into 2mol / L sulfuric acid solution and etch it for 40min at room temperature, then take out the aluminum sheet and wash it with a large amount of distilled water to stop the reaction. Dry in an oven after ultrasonic cleaning.

[0037] 3. Immerse the aluminum sheet obtained in step 2 into nano-TiO with a particle size of 50nm and 1wt%. 2 in the ethanol solution for 2 min, and reacted in the muffle furnace at 300°C for 3 h after taking it out, and the nano-TiO 2 grafted onto the aluminum surface.

[0038] 4. Dip-coat the aluminum sheet in step 3 in a 3wt% ethanol solution of tridecafluorooctyltriethoxysilane for 2 hours, take it out and cure at 150° C. for 3 hours to obtain a super-hydrophobic coat...

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Abstract

The invention discloses a preparation method of a super-hydrophobic coating layer on an aluminum surface. The preparation method mainly comprises the following steps: (1) an aluminum piece is polished by an abrasive paper, is ultrasonically cleaned for 10 minutes by acetone and ethanol, is washed by distilled water to remove oil stains on the surface, and is dried in an oven; (2) the aluminum piece is dip in an acid etching agent for etching to obtain the aluminum surface with a micron rough structure; (3) the micron rough aluminum piece is dip in nanometer TiO2 particle solution, and is treated at high temperature to obtain the aluminum surface with a micron-nanometer composite rough structure; and (4) the aluminum surface with the micron-nanometer composite rough structure is treated by fluorine silane with low surface energy to obtain the aluminum surface with super-hydrophobic performance. The prepared super-hydrophobic aluminum piece is excellent in self-cleaning performance, fog resistance and ice covering resistance, and can be applied to field of ice covering prevention.

Description

technical field [0001] The invention relates to the field of preparation of superhydrophobic surfaces, in particular to a method for preparing superhydrophobic coatings on aluminum surfaces. Background technique [0002] Fog, frost, snow, etc. are common natural phenomena. When the water vapor in the air meets the surface of a supercooled object, it will condense into water droplets or condense into ice crystals and adhere to the surface of the object, forming fog and frost. The adhesion and accumulation of ice and snow on outdoor building materials, highways, high-voltage wires, and aircraft will bring a lot of inconvenience to people's production and life, and even threaten the safety of life and property, causing huge economic losses. [0003] The current deicing methods on the surface of objects mainly include physical and chemical methods, which will lead to the loss of energy and resources. In recent years, inspired by the superhydrophobic properties of biomaterial su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D3/10C23F1/20C23C18/12
CPCB05D3/102B05D5/083B05D2401/10C23C18/1216C23C18/1262C23F1/20
Inventor 张庆华王兵詹晓力陈丰秋
Owner ZHEJIANG UNIV
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