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Process method for preparing ultra-hydrophobic surface by electrochemical method

A technology of superhydrophobic surface and process method, applied in the field of preparation of superhydrophobic surface, can solve the problems of improving the cost of environmental protection of pollutants, unfavorable large-scale production safety, endangering life safety, etc., achieving extremely easy large-area preparation, excellent The effect of hydrophobicity and good stability

Active Publication Date: 2010-03-10
甘肃中安瑞科科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This chemical corrosion method must use some highly corrosive substances, such as hydrofluoric acid, nitric acid, hydrogen peroxide and destructive strong acid or strong alkaline substances or their mixed solutions, etc., the use of these substances will inevitably It will cause environmental pollution and even endanger life safety. In addition, it will virtually increase the cost of pollutant post-treatment and future environmental protection, and will also bring unfavorable factors to the safety of large-scale production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A rectangular aluminum sheet (purity of 99.9%) of 6 cm × 2 cm was ultrasonically cleaned with ethanol and acetone for 10 minutes, and rinsed with deionized water, and the processed aluminum sheet was electrochemically etched in 0.06M sodium chloride solution. For corrosion, the lead plate is used as the cathode, the aluminum sheet is used as the anode, the DC voltage is 4V, the temperature is 22°C, and the reaction is performed for 3 hours. After the aluminum sheet was taken out, it was ultrasonically cleaned in deionized water for 10 minutes to remove the aluminum oxide particles attached to the surface. Then, the aluminum sheet was anodized in 0.3M oxalic acid aqueous solution, the applied DC voltage was 60 volts, the temperature of the reaction solution was controlled at 10°C with a constant temperature bath, and the reaction was carried out for 2 hours. Surface micro-nano double structure. Afterwards, the surface is modified with low surface energy substances: soak...

Embodiment 2

[0028] A 6cm×2cm rectangular aluminum alloy sheet (containing a small amount of silicon and magnesium) was ultrasonically cleaned with ethanol and acetone for 10 minutes, and rinsed with deionized water, and the treated aluminum alloy sheet was placed in 0.08M sodium chloride solution Electrochemical etching, lead plate as cathode, aluminum sheet as anode, DC voltage 8V, temperature 22°C, reaction for 2.5 hours. After the aluminum alloy sheet was taken out, it was ultrasonically cleaned in deionized water for 10 minutes. Then, the aluminum alloy sheet was anodized in 0.3M oxalic acid solution, the applied DC voltage was 75V, the temperature of the reaction solution was controlled at 10°C with a constant temperature tank, and the reaction was carried out for 2 hours. The micro-nano dual structure on the leaf surface. Afterwards, the surface is modified with low surface energy substances: the aluminum alloy sheet is soaked in a pre-configured ethanol solution (1 wt%) of dodecaf...

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Abstract

The invention discloses a process method for preparing an ultra-hydrophobic surface by the electrochemical method. The process adopts two processing steps: forming the micro nanometer double-structurerough surface by first electrochemical etching and then oxalic acid anodic oxidation; and preparing the ultra-hydrophobic surface by modifying the surface with fluorosilane. The method is simple andpractical, uses mature electrochemical etching and anodic oxidation technology, allows for easy mass production and avoids environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment and modification, in particular to a method for preparing a superhydrophobic surface. Background technique [0002] Wettability is an important property of solid surface, which has a wide range of research and application significance in many fields. Among them, the study of the wettability of solid surfaces to water, including the study of hydrophobicity and hydrophilicity, especially the study of superhydrophobicity, has aroused widespread attention and interest of researchers at home and abroad in recent years. Currently, there have been many reports showing how to achieve superhydrophobic properties on various surfaces. Among these methods, the idea of ​​realization is mainly in two aspects: (1) to make the original hydrophobic surface have an appropriate rough structure; (2) to modify the surface with rough structure with low surface energy substances, such as fluorosilane. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/12C25D11/24B05D5/08C09D183/00
Inventor 周峰吴伟词
Owner 甘肃中安瑞科科技有限公司
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