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Low-cost superhydrophobic surface treatment method of aluminum alloy

A technology of superhydrophobic surface and treatment method, applied in the field of superhydrophobic surface treatment of aluminum alloy, can solve the problems of difficult to grasp hydrolysis and modification process, high toxicity of thiol, high cost, etc., achieve good superhydrophobic performance, and the preparation process is simple and easy the effect of reducing production costs

Inactive Publication Date: 2011-03-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, mercaptans are highly toxic, harmful to the human body and not low in cost; there are many types of silane coupling agents, which are selective for modifying the surface, and their hydrolysis and modification processes are difficult to grasp; both polytetrafluoroethylene and fluorosilane have good Modification effect, and stable performance, but the cost is high, it is difficult to promote in industrial production

Method used

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  • Low-cost superhydrophobic surface treatment method of aluminum alloy
  • Low-cost superhydrophobic surface treatment method of aluminum alloy
  • Low-cost superhydrophobic surface treatment method of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The surface of the A356 aluminum alloy was chemically etched with an aqueous hydrochloric acid solution with a concentration of 80g / L, the etching temperature was 40°C (water bath), and the etching time was 5min, so as to build a rough structure on the surface. Wash the aluminum alloy after hydrochloric acid etching with deionized water to remove residual hydrochloric acid, then take it out and dry it;

[0032] Prepare stearic acid solution: dissolve stearic acid in ethanol solvent, and the mass percentage of stearic acid to ethanol is 8wt.%.

[0033] Add the stearic acid solution into the test tube, then put the test tube and the processed sample in a sealed container, put the sealed container in a box-type electric furnace, heat it to 150°C, and keep it warm for 2 hours, then take out the aluminum alloy and put it in the box Heat it to 80°C in a type electric furnace, keep it warm for 0.5 hours, and then take it out and air-cool it.

[0034] After the sample is etche...

Embodiment 2

[0036] The surface of the A356 aluminum alloy was chemically etched with a hydrochloric acid aqueous solution with a concentration of 92g / L, the etching temperature was 40°C (water bath), and the etching time was 3min, so as to build a rough structure on the surface. Wash the aluminum alloy after hydrochloric acid etching with deionized water to remove residual hydrochloric acid, then take it out and dry it;

[0037] Preparation of lauric acid solution: Dissolve lauric acid in ethanol solvent, the mass percentage of lauric acid to ethanol is 4wt.%.

[0038] Add the lauric acid solution into the test tube, then put the test tube and the processed sample into a sealed container, put the sealed container into a box-type electric furnace, heat it to 150°C, and keep it warm for 2 hours, then take out the aluminum alloy and place it in a box-type electric furnace. Heat it to 80°C in an electric furnace, keep it warm for 0.5 hours, and then take it out and air-cool it.

[0039] Afte...

Embodiment 3

[0042] The surface of the A356 aluminum alloy was chemically etched with a hydrochloric acid solution with a concentration of 87g / L, the etching temperature was 40°C (water bath), and the etching time was 4min, so as to build a rough structure on the surface. Wash the aluminum alloy after hydrochloric acid etching with deionized water to remove residual hydrochloric acid, then take it out and dry it;

[0043] Prepare a mixed solution of lauric acid and stearic acid: dissolve lauric acid and stearic acid in an ethanol solvent, and the mass percentages of lauric acid, stearic acid and ethanol are 1wt.% and 5wt.% respectively.

[0044] Add the mixed solution of lauric acid and stearic acid into the test tube, then put the test tube and the processed sample in a sealed container, put the sealed container in a box-type electric furnace, heat it to 150°C, keep it warm for 2 hours, and then put the aluminum alloy Take it out, heat it to 80°C in a box-type electric furnace, keep it wa...

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Abstract

The invention provides a low-cost superhydrophobic surface treatment method of aluminum alloy, which comprises the following steps: (1) carrying out chemical etching on the surface of the aluminum alloy by utilizing hydrochloric acid aqueous solution with the mass-volume concentration of 70g / L-95g / L in water bath at the temperature of 30-50 DEG C for 3-6min; and (2) carrying out evaporation modification on the surface of the aluminum alloy by utilizing long chain fatty acid solution by an evaporation method, wherein, the long chain fatty acid comprises at least one of lauric acid and stearic acid, and the long chain fatty acid solution is prepared by dissolving fatty acid into an ethanol solvent based on the mass percent of 3wt.%-15wt.%. The evaporation method comprises the following steps: placing the long chain fatty acid solution and the aluminum alloy subject to chemical etching treatment in a sealed container; putting the sealed container in a chamber electric furnace, heating until the temperature of the mixture is up to 100-200 DEG C, and performing heat preservation for 1-3h; and taking out the aluminum alloy and placing the aluminum alloy in the chamber electric furnace again, curing at the temperature of 50-90 DEG C for 0.5-1.5h, and finally taking out the aluminum alloy, and carrying out air cooling on the aluminum alloy to obtain the aluminum alloy surface which has the advantages of good superhydrophobic characteristic and less possibility of being adhered to water drops.

Description

technical field [0001] The invention relates to a low-cost aluminum alloy super-hydrophobic surface treatment method. Background technique [0002] Aluminum alloys are widely used in many fields due to their light weight, high specific strength, high thermal efficiency, moderate price, and easy processing. Superhydrophobic surfaces have attracted great attention worldwide, and have gradually become one of the hotspots in biomimetic nanomaterials technology. This surface has extremely important application prospects in many fields such as national defense, industrial and agricultural production, and daily life. For example, it can be applied to outdoor antennas in high snowfall areas to prevent snow accumulation to ensure smooth signal; it can be used in pipelines to prevent liquid from adhering to the pipeline wall; it can be used in water transportation vehicles to reduce water resistance and improve Travel speed; used in microfluidic devices to achieve low resistance to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/06C23C8/02
Inventor 余新泉张友法周荃卉吴洁陈锋
Owner SOUTHEAST UNIV
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