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Aluminum product surface super-hydrophobic film and making method thereof

A super-hydrophobic, aluminum surface technology, applied in anodizing and other directions, can solve problems such as corrosion resistance and friction resistance of super-hydrophobic surfaces that are not involved, and achieve the effect of simple and controllable oxidation process, simple treatment process and simple composition

Inactive Publication Date: 2014-11-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these published patents do not involve the corrosion resistance and friction resistance of the obtained superhydrophobic surface.

Method used

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  • Aluminum product surface super-hydrophobic film and making method thereof
  • Aluminum product surface super-hydrophobic film and making method thereof
  • Aluminum product surface super-hydrophobic film and making method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The aluminum sheet substrate was polished with 800-grit sandpaper, rinsed with pure water, dried, and used as an anode, and an aluminum sheet of the same size was used as a cathode. At 0.2mol·L -1 Sodium chloride aqueous solution is used as the electrolyte, and the current density is 0.4A cm -2 The anodic oxidation reaction was carried out under the conditions, the reaction temperature was room temperature, and the reaction time was 7 minutes. After the reaction, the alumina material was taken out, washed with water, and dried. Then, soak the alumina material in the ethanol solution of heptadecafluorodecyltriethoxysilane with a volume concentration of 10% for 5 minutes, take out the sample after soaking and place it in an oven for 30 minutes at 100°C to obtain superhydrophobic film. The hydrophobicity, corrosion resistance and friction resistance of the surface were tested, the results are shown in Table 1, and the contact angle diagram is as follows figure 1 shown....

Embodiment 2

[0032] The aluminum sheet substrate was polished with 1000-grit sandpaper, rinsed with pure water, dried, and used as an anode, and an aluminum sheet of the same size was used as a cathode. at 0.1mol·L -1 Potassium chloride aqueous solution is used as the electrolyte, and the current density is 0.3A cm -2 The anodic oxidation reaction is carried out under the conditions, the reaction temperature is room temperature, and the reaction time is 5 minutes. After the reaction, the alumina material was taken out, washed with water, and dried. Then, soak the alumina material in ethanol solution with a volume concentration of 1% tridecafluorooctyltrimethoxysilane for 7 minutes, take out the sample after soaking and place it in an oven for 10 minutes at 130°C to obtain super Hydrophobic film. The hydrophobicity, corrosion resistance and friction resistance of the surface were tested, the results are shown in Table 1, and the contact angle diagram is as follows figure 2 shown.

Embodiment 3

[0034] The aluminum sheet substrate was polished with 600-grit sandpaper, rinsed with pure water, dried, and used as an anode, and an aluminum sheet of the same size was used as a cathode. at 0.3mol·L -1 Sodium sulfate aqueous solution is used as the electrolyte, and the current density is 0.3A cm -2 The anodic oxidation reaction was carried out under the conditions, the reaction temperature was room temperature, and the reaction time was 9 minutes. After the reaction, the alumina material was taken out, washed with water, and dried. Then, soak the alumina material in ethanol solution with a volume concentration of 5% heptadecafluorodecyltrimethoxysilane for 10 minutes, take out the sample after soaking and place it in an oven for 15 minutes at 110°C to obtain super Hydrophobic film. The hydrophobicity, corrosion resistance and friction resistance of the surface were tested, the results are shown in Table 1, and the contact angle diagram is as follows image 3 shown.

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Abstract

The invention relates to an aluminum product surface super-hydrophobic film and a making method thereof. The method comprises the following steps: 1, placing an aluminum product in an electrolyte as an anode, and anodizing under a current density of 0.1-0.5A.cm<-2> for 1-20min to obtain an anodized aluminum surface; and 2, immersing the anodized aluminum surface in an ethanol solution containing silicon fluoride for at least 1min, carrying out heat treatment on the obtained workpiece at 100-200DEG C for 5-40min, and naturally cooling to obtain the aluminum product surface super-hydrophobic film. The making method of the super-hydrophobic surface has the advantages of simplicity, low cost and easy industrialization. The super-hydrophobic surface made in the invention has a contact angle exceeding 150DEG, a roll angle of below 10DEG and stable hydrophobicity. The surface has the advantages of very good super-hydrophobic function, very good automatic cleaning function, excellent wear resistance and excellent corrosion resistance.

Description

technical field [0001] The invention relates to a method for obtaining a long-term stable superhydrophobic film on the surface of aluminum materials of various sizes and shapes. The obtained superhydrophobic surface not only has very good superhydrophobic and self-cleaning functions, but also has excellent friction resistance and Anti-corrosion function. Background technique [0002] Aluminum is the most widely distributed metal element in nature. Its advantages such as high specific strength and small specific gravity make aluminum materials widely used in various fields. Although aluminum has good corrosion resistance in the air, the chemical activity of aluminum makes it susceptible to corrosion in a humid environment or in seawater, which limits the industrial application of aluminum. The super-hydrophobic surface (the contact angle between the material surface and water is greater than 150°) has special wetting characteristics, making it suitable for waterproof, anti-f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/18
Inventor 苏峰华刘灿森
Owner SOUTH CHINA UNIV OF TECH
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