Surface treatment method of superhydrophobic aluminum foil

A surface treatment, super-hydrophobic technology, applied in the field of super-hydrophobic aluminum foil surface treatment, can solve the problems of complex treatment process, large damage to the substrate, difficult to control, etc., and achieves simple process steps and equipment operation, improved corrosion resistance, and low cost. Effect

Inactive Publication Date: 2012-02-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Some technologies obtain the rough structure required by the superhydrophobic surface through top-down etching, but the damage to the substrate is relatively large
For example, the wet chemical etching method mostly uses a solution containing hydrochloric acid and sodium hydroxide for etching. The reaction is more violent and difficult to control. When corroding aluminum foil, it is easy to penetrate in parts with residual stress and defects.
[0006] (2) The processing process is complex
[0007] Anodic oxidation is a common process for the surface treatment of aluminum and its alloys, but it needs to be combined with sandblasting, plasma treatment and other technologies to treat the surface of the sample to prepare a super-hydrophobic surface, and the process is relatively complicated.

Method used

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  • Surface treatment method of superhydrophobic aluminum foil
  • Surface treatment method of superhydrophobic aluminum foil
  • Surface treatment method of superhydrophobic aluminum foil

Examples

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Effect test

example 1

[0024] (1) Clean the 0.04mm thick aluminum foil (the content of aluminum element is 99.5%) with acetone and deionized water ultrasonically and dry it, and then immerse it in 1mol / L NaOH aqueous solution for 30~60s. In this example , the treatment time is 30s to remove the oxide film on the surface of the aluminum foil;

[0025] (2) Prepare a mixed aqueous solution of phosphoric acid and sodium chloride, place it in a constant temperature water bath at 70°C and heat it at a constant temperature, then soak the pretreated aluminum foil in it, take it out after 12 minutes, wash it with ethanol and deionized water and dry it ; In the mixed aqueous solution of phosphoric acid and sodium chloride, the concentration of phosphoric acid is 85g / L, and the concentration of sodium chloride is 15g / L;

[0026] (3) Soak the aluminum foil soaked in aqueous solution in liquid stearic acid at 70°C for 1 hour, then rinse it in hot ethanol at 70°C, and finally cure it in an oven at 80°C for 30 min...

example 2

[0029] (1) Clean the 0.04mm thick aluminum foil (the content of aluminum element is 99.5%) with acetone and deionized water ultrasonically and dry it, and then immerse it in 1mol / L NaOH aqueous solution for 30~60s. In this example , the treatment time is 50 or 60s to remove the oxide film on the surface of the aluminum foil;

[0030] (2) Prepare a mixed aqueous solution of phosphoric acid and sodium chloride, place it in a constant temperature water bath at 70°C and heat it at a constant temperature, then soak the pretreated aluminum foil in it, take it out after 12 minutes, wash it with ethanol and deionized water and dry it ; In the mixed aqueous solution of phosphoric acid and sodium chloride, the concentration of phosphoric acid is 128g / L, and the concentration of sodium chloride is 10g / L;

[0031] (3) Soak the aluminum foil soaked in aqueous solution in liquid stearic acid at 70°C for 1 hour, then rinse it in hot ethanol at 70°C, and finally cure it in an oven at 80°C for...

example 3

[0033] (1) Clean the 0.04mm thick aluminum foil (the content of aluminum element is 99.5%) with acetone and deionized water ultrasonically and dry it, and then immerse it in 1mol / L NaOH aqueous solution for 30~60s. In this example , the treatment time is 50s to remove the oxide film on the surface of the aluminum foil;

[0034] (2) Prepare a mixed aqueous solution of phosphoric acid and sodium chloride, place it in a constant temperature water bath at 70°C and heat it at a constant temperature, then soak the pretreated aluminum foil in it, take it out after 12 minutes, wash it with ethanol and deionized water and dry it ; In the mixed aqueous solution of phosphoric acid and sodium chloride, the concentration of phosphoric acid is 102g / L, and the concentration of sodium chloride is 25g / L;

[0035] (3) Soak the aluminum foil soaked in aqueous solution in liquid stearic acid at 70°C for 1 hour, then rinse it in hot ethanol at 70°C, and finally cure it in an oven at 80°C for 30 mi...

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Abstract

The invention relates to a surface treatment method of superhydrophobic aluminum foil, which comprises the steps of: firstly, carrying out ultrasonic cleaning on the aluminum foil with acetone and deionized water, drying and then immersing in 1mol/L NaOH water solution for treating for 30-60 seconds; then cleaning with alcohol and deionized water in sequence, and drying for later use; soaking thetreated aluminum foil in a phosphoric acid and sodium chloride mixed water solution, etching for 12 minutes in a water bath at the constant temperature of 70 DEG C, taking out and then cleaning with alcohol and deionized water, and drying; soaking the aluminum foil treated by the mixed water solution in liquid stearic acid at 70 DEG C for 1 hour, and then washing in hot alcohol at 70 DEG C; and finally, curing in an oven at 80 DEG C for 30 minutes to prepare the surface of the superhydrophobic aluminum foil. The surface treatment method provided by the invention is convenient in operation, has low cost, and is especially suitable for constructing super hydrophobicity on the surface of the aluminum foil.

Description

technical field [0001] The invention relates to a method for treating the surface of superhydrophobic aluminum foil. Background technique [0002] Aluminum foil has the advantages of light weight, extensibility, and good electrical and thermal conductivity. It is widely used in air-conditioning radiators, automobile radiators, cables and other fields. The surface of ordinary aluminum foil is hydrophilic, which is prone to problems such as condensation, corrosion, microbial contamination, and frosting. The superhydrophobic surface has the characteristics of anti-condensation, corrosion resistance, self-cleaning, anti-frosting, etc., which can significantly improve the performance of aluminum foil, and has important economic and social benefits. [0003] After years of development, a variety of methods for preparing superhydrophobic surfaces of aluminum and aluminum alloys have been reported, such as wet chemical etching, organic and / or inorganic coating, anodic oxidation, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/20
Inventor 张友法余新泉吴昊陈锋
Owner SOUTHEAST UNIV
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