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Super-hydrophobic aluminium and preparation method thereof

A super-hydrophobic and water-aluminum technology, which is applied in the coating process of metal materials, devices for coating liquid on the surface, special surfaces, etc., can solve the problems of restricting the practical application of metal surfaces, time-consuming, and toxic pollution to the environment during the preparation process.

Inactive Publication Date: 2012-09-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the existing research, there are many ways to improve the anti-oxidation and anti-corrosion performance of aluminum surface, such as surface physical treatment, surface chemical treatment, surface coating technology, plasma surface treatment technology, etc., can greatly improve the anti-oxidation of the surface and anti-corrosion properties; these measures are cumbersome, time-consuming, often require special preparation processes and environmental toxic pollution, which greatly restricts the practical application of metal surfaces; therefore, invent a convenient, efficient and low-cost preparation technology, It is necessary to prepare a superhydrophobic aluminum surface with high interfacial bonding strength

Method used

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  • Super-hydrophobic aluminium and preparation method thereof
  • Super-hydrophobic aluminium and preparation method thereof
  • Super-hydrophobic aluminium and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] First, the aluminum sheet was immersed in absolute ethanol and acetone for 10 minutes, then ultrasonically cleaned, then taken out, rinsed with deionized water, and dried with nitrogen to obtain a pretreated aluminum sheet; then the above pretreated aluminum sheet was immersed in a concentration of React in 3.5mol / L hydrochloric acid solution at 45°C for 8 minutes, take it out, wash it with deionized water, then put it in boiling water for 20 minutes, take it out, dry it with nitrogen gas, and get an aluminum surface with a rough structure; Finally, soak the above-mentioned aluminum sheet with a rough structure in 0.01 mol / L perfluorooctanoic acid aqueous solution, take it out after 60 minutes, and dry it with nitrogen to obtain superhydrophobic aluminum.

[0022] see figure 1 , using OCAH200 contact angle tester to test the wettability of the aluminum surface, the results show that the contact angle of the surface with water is 168o, and the rolling angle is less than ...

Embodiment 2

[0029] First, the aluminum sheet was immersed in absolute ethanol and acetone for 10 minutes, then ultrasonically cleaned, then taken out, rinsed with deionized water, and dried with nitrogen to obtain a pretreated aluminum sheet; then the above pretreated aluminum sheet was immersed in a concentration of 4mol / L and a temperature of 30 ℃ hydrochloric acid solution for 8 minutes, take it out, wash it with deionized water, then put it in boiling water for 20 minutes, take it out, dry it with nitrogen, and get an aluminum surface with a rough structure; finally Soak the above-mentioned aluminum sheet with a rough structure in 0.008mol / L perfluorooctanoic acid aqueous solution, take it out after 60 minutes, and dry it with nitrogen to obtain a superhydrophobic aluminum surface.

[0030] The wettability of the aluminum surface was tested by OCAH200 contact angle tester, and the results showed that the contact angle between the surface and water was 165°, and the rolling angle was le...

Embodiment 3

[0037] First, the aluminum sheet was immersed in absolute ethanol and acetone for 10 minutes, then ultrasonically cleaned, then taken out, rinsed with deionized water, and dried with nitrogen to obtain a pretreated aluminum sheet; then the above pretreated aluminum sheet was immersed in a concentration of React in 2.5mol / L hydrochloric acid solution with a temperature of 75°C for 8 minutes, take it out, wash it with deionized water, then put it in boiling water for 20 minutes, take it out, dry it with nitrogen, and get an aluminum surface with a rough structure; Finally, soak the above-mentioned aluminum sheet with a rough structure in 0.02 mol / L perfluorooctanoic acid aqueous solution, take it out after 40 minutes, and dry it with nitrogen to obtain a superhydrophobic aluminum surface.

[0038] The wettability of the aluminum surface was tested by OCAH200 contact angle tester, and the results showed that the contact angle between the surface and water was 155o, and the rolling...

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Abstract

The invention relates to the technical field of super-hydrophobic materials, in particular to super-hydrophobic aluminium and a preparation method thereof. The preparation method comprises the following steps of: taking aluminium as a base material; soaking an aluminum sheet into hydrochloric acid solution so as to carry out chemical reaction; boiling through boiled water; forming a micro-nano composite structure with micron-sized bulges, holes and a nano-scale scaly shape on the surface of the aluminium; and modifying through perfluoro caprylic acid to obtain the surface of the aluminium sheet with a super-hydrophobic performance.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic materials, in particular to superhydrophobic aluminum and a preparation method thereof. Background technique [0002] The wettability of the material surface depends on the surface chemical properties and microstructure of the material; the so-called super-hydrophobic surface refers to the surface with a contact angle with water greater than 150°, and a rolling angle less than 10°; due to its waterproof, anti-fog, snow-proof, Anti-pollution, anti-adhesion, anti-oxidation, anti-corrosion, self-cleaning, and prevention of current conduction have broad application prospects, and have attracted extensive attention from material science researchers. [0003] Aluminum is a silver-white metal with a melting point of 657°C and a density of 2.70g / cm 3 ; Due to its high specific strength, good ductility, and excellent physical and chemical properties such as easy forming and processing, metal alum...

Claims

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Application Information

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IPC IPC(8): C23F1/20C23C22/56C23C22/34B05D5/08
Inventor 吉海燕陈刚赵玉涛胡杰杨进李冬升宋浩杰
Owner JIANGSU UNIV
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