Method for preparing biomimetic super hydrophobic surface

A super-hydrophobic, ionized water technology, applied in the direction of metal material coating process, can solve the problems of high cost, unsuitable for industrial production, complex process, etc., to prevent corrosion, good heat resistance and acid and alkali corrosion resistance, Prepare industrially simple effects

Inactive Publication Date: 2007-05-23
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current commonly used methods mentioned above are generally complicated in process and high in cost, and

Method used

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  • Method for preparing biomimetic super hydrophobic surface
  • Method for preparing biomimetic super hydrophobic surface
  • Method for preparing biomimetic super hydrophobic surface

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1. Use an ultrasonic cleaner to clean the aluminum and its alloy samples. The cleaning steps are: 1) put the aluminum and its alloy samples in acetone and clean them ultrasonically for 30 minutes to remove the grease on the samples; Put the good sample into 5wt% HCl solution for 10min to remove the oxide layer on the sample, 3) then wash it with deionized water for 5min, 4) finally dry it in a vacuum oven at 50°C for 30min before use;

[0027] 2. Put the treated aluminum and its alloy samples into 1M NaOH solution for oxidation for 2 hours; the oxidized aluminum and its alloy samples are washed with deionized water to remove excess NaOH solution on the surface of the oxidized sample, and then Dry the oxidized sample in the atmosphere at 120°C for 1h;

[0028] 3. Add perfluorononane dropwise to the surface of the dried sample for chemical modification, and then dry it with a hair dryer to obtain a bionic superhydrophobic surface.

[0029] The scanning electron microscop...

Embodiment 2

[0032] 1. Use an ultrasonic cleaner to clean the aluminum and its alloy samples. The cleaning steps are: 1) put the aluminum and its alloy samples in acetone and clean them ultrasonically for 30 minutes to remove the grease on the samples; Put the good sample into 5wt% HCl solution for 10min to remove the oxide layer on the sample, 3) then wash it with deionized water for 5min, 4) finally dry it in a vacuum oven at 50°C for 30min before use;

[0033] 2. Put the processed aluminum and its alloy samples into 0.5M NaOH solution for oxidation for 2 hours; the oxidized aluminum and its alloy samples were washed with deionized water to remove excess NaOH solution on the surface of the oxidized sample, Then dry the oxidized sample in the air atmosphere at 100℃ for 1h;

[0034] 3. Add perfluorononane dropwise to the surface of the dried sample for chemical modification, and dry the oxidized sample in the air at 100°C for 1 hour in a drying oven to obtain a bionic superhydrophobic surf...

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Abstract

The invention relates to a technology for preparing bionic super hydrophobicity surface, especially Al or Al alloy bionic super hydrophobicity surface. The method is pre-oxidizing Al or Al alloy and chemical modifying the surface to form bionic super hydrophobicity surface. Dropping pure water, acid or alkaline liquid to the surface of Al or Al alloy for contact angle detection, the contact angles are all over 150degree.

Description

technical field [0001] The invention relates to producing a bionic superhydrophobic surface on the surface of aluminum or aluminum alloy, in particular to a preparation method having superhydrophobic, superhydrophobic and superhydrophobic surfaces at the same time. Background technique [0002] Surface science research and thin film preparation technology have been widely concerned by people, and these research and technology are closely related to people's daily life. In the field of physical and chemical materials research, the research on the hydrophobic and hydrophilic properties of materials has gradually matured, and there have been many patents and products on hydrophilic and hydrophobic materials in the last century. At the same time, it has been found that some plants, such as lotus leaves, taro leaves and straw leaves, have super-hydrophobicity and self-purification capabilities. It has been found that the structural properties of superhydrophobic plants lead to t...

Claims

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Application Information

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IPC IPC(8): C23C22/66C23C22/78C23C22/83
Inventor 刘维民郭志光
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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