Low-damage preparation method of super-hydrophobic surface of industrial aluminum foil

A super-hydrophobic surface, low-damage technology, applied in the direction of metal material coating process, etc., can solve the problems of complex processing process, large damage to the substrate, difficult to control, etc., to achieve simple process steps and equipment operation, low cost, and prevent local penetration. see-through effect

Inactive Publication Date: 2012-04-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
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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

Method used

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  • Low-damage preparation method of super-hydrophobic surface of industrial aluminum foil
  • Low-damage preparation method of super-hydrophobic surface of industrial aluminum foil
  • Low-damage preparation method of super-hydrophobic surface of industrial aluminum foil

Examples

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Example Embodiment

[0026] Example 1

[0027] (1) The 0.04mm thick industrial aluminum foil (with aluminum element content of 99.5%) was ultrasonically cleaned with acetone and deionized water and dried, and then immersed in a 1mol / L NaOH aqueous solution for treatment for 30 to 60 seconds. In this example The treatment time is 45s to remove the oxide film on the surface of industrial aluminum foil;

[0028] (2) Prepare a mixed aqueous solution of phosphoric acid and sodium fluoride, place it in a constant temperature water bath at 70°C and heat it at a constant temperature, then soak the pre-treated industrial aluminum foil in it, take it out after 5 minutes, wash it with ethanol and deionized water and blow Dry; In the mixed aqueous solution of phosphoric acid and sodium fluoride, the concentration of phosphoric acid is 43g / L, and the concentration of sodium fluoride is 45g / L;

[0029] (3) The industrial aluminum foil immersed in the aqueous solution is soaked in liquid stearic acid at 70°C for 1 hou...

Example Embodiment

[0031] Example 2

[0032] (1) The 0.04mm thick industrial aluminum foil (with aluminum element content of 99.5%) was ultrasonically cleaned with acetone and deionized water and dried, and then immersed in a 1mol / L NaOH aqueous solution for treatment for 30 to 60 seconds. In this example The treatment time is 30s to remove the oxide film on the surface of industrial aluminum foil;

[0033] (2) Prepare a mixed aqueous solution of phosphoric acid and sodium fluoride, place it in a constant temperature water bath at 70°C and heat it at a constant temperature, then soak the pre-treated industrial aluminum foil in it, take it out after 5 minutes, wash it with ethanol and deionized water and blow Dry; In the mixed aqueous solution of phosphoric acid and sodium fluoride, the concentration of phosphoric acid is 85g / L, and the concentration of sodium fluoride is 23g / L;

[0034] (3) The industrial aluminum foil soaked in the aqueous solution was soaked in liquid stearic acid at 70°C for 1 hour...

Example Embodiment

[0036] Example 3

[0037] (1) The 0.04mm thick industrial aluminum foil (with aluminum element content of 99.5%) was ultrasonically cleaned with acetone and deionized water and dried, and then immersed in a 1mol / L NaOH aqueous solution for treatment for 30 to 60 seconds. In this example The treatment time is 60s to remove the oxide film on the surface of industrial aluminum foil;

[0038] (2) Prepare a mixed aqueous solution of phosphoric acid and sodium fluoride, place it in a constant temperature water bath at 70°C and heat it at a constant temperature, then soak the pre-treated industrial aluminum foil in it, take it out after 5 minutes, wash it with ethanol and deionized water and blow Dry; In the mixed aqueous solution of phosphoric acid and sodium fluoride, the concentration of phosphoric acid is 21 g / L, and the concentration of sodium fluoride is 35 g / L;

[0039] (3) The industrial aluminum foil soaked in the aqueous solution was soaked in liquid stearic acid at 70°C for 1 ho...

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Abstract

The invention provides a low-damage preparation method of a super-hydrophobic surface of an industrial aluminum foil. The method comprises the following steps of: firstly, ultrasonically cleaning the industrial aluminum foil with acetone and deionized water, blow-drying the industrial aluminum foil, then immerging the industrial aluminum foil into a NaOH water solution of which the concentration is 1mol/L to be processed for 30-60 seconds, then cleaning the industrial aluminum foil with ethanol and deionized water sequentially, and blow-drying the industrial aluminum foil for later use; soaking the preprocessed industrial aluminum foil in a prepared phosphoric acid and sodium fluoride mixed water solution, etching the industrial aluminum foil for 5 minutes in a water bath at the constant temperature of 70 DEG C, taking out the industrial aluminum foil, then cleaning the industrial aluminum foil with ethanol and deionized water, and blow-drying the industrial aluminum foil; and soaking the industrial aluminum foil processed by the mixed water solution in liquid stearic acid at 70 DEG C for 1 hour, then rinsing the industrial aluminum foil in hot ethanol at 70 DEG C, and finally curing the industrial aluminum foil in an oven at 80 DEG C for 30 minutes to obtain an industrial aluminum foil surface with super-hydrophobicity. The method provided by the invention is simple and convenient in operation, has low cost and small substrate damage, and is especially suitable for constructing thinner industrial aluminum foil surfaces with super-hydrophobicity.

Description

technical field [0001] The invention relates to a low-damage preparation method on the super-hydrophobic surface of industrial aluminum foil. Background technique [0002] Aluminum foil has the advantages of light weight, extensibility, and good electrical and thermal conductivity. Industrial aluminum foil 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...

Claims

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Application Information

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IPC IPC(8): C23F1/20C23C22/36
Inventor 张友法余新泉吴昊陈锋
Owner SOUTHEAST UNIV
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