Simple and convenient method for preparing super-hydrophobic film on surface of metal matrix

A metal matrix, super-hydrophobic technology, used in surface reaction electrolytic coatings, electrolytic coatings, coatings, etc., can solve the problem of long processing time, achieve the effect of simple operation and shorten the film forming time

Inactive Publication Date: 2011-01-05
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing time in this method is still very long, and it is necessary to develop a faster method for its application in industrial production

Method used

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  • Simple and convenient method for preparing super-hydrophobic film on surface of metal matrix
  • Simple and convenient method for preparing super-hydrophobic film on surface of metal matrix
  • Simple and convenient method for preparing super-hydrophobic film on surface of metal matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Substrate cleaning: Clean the surface of the copper substrate with ethanol and deionized water successively, and dry it with nitrogen gas for later use;

[0016] 2) Preparation of superhydrophobic membrane: using electrochemical method, 0.5mol / LCH at 25°C 3 (CH 2 ) 12 In the ethanol solution of COOH, a 10V DC voltage was applied between the cleaned copper substrate and the platinum electrode as the cathode. After 1 hour of treatment, a blue fatty acid-copper complex film appeared on the copper surface, and after drying with nitrogen, the film took the form of Superhydrophobic state, the surface contact angle is 151.3 ± 3 ° (see figure 1 ).

Embodiment 2

[0018] 1) Substrate cleaning: Clean the surface of brass (28wt.% Zn, 72wt.% Cu) with ethanol and deionized water in sequence, and dry it with nitrogen gas for later use;

[0019] 2) Preparation of superhydrophobic membrane: using electrochemical method, 0.3mol / LCH at 25°C 3 (CH 2 ) 12 In the ethanol solution of COOH, a 40V DC voltage was applied between the cleaned brass substrate and the platinum electrode as the cathode. After 2 hours of treatment, a light blue fatty acid-metal complex film appeared on the surface of the brass. After drying with nitrogen, the film The layer is in a superhydrophobic state, and the surface contact angle is 154.7±3° (see figure 2 ).

Embodiment 3

[0021] 1) Substrate cleaning: Clean the surface of the zinc substrate with ethanol and deionized water in sequence, and dry it with nitrogen gas for later use;

[0022] 2) Preparation of superhydrophobic membrane: using electrochemical method, 0.1mol / LCH at 25°C 3 (CH 2 ) 12 In the ethanol solution of COOH, a 30V DC voltage was applied between the cleaned zinc substrate and the platinum electrode as the cathode. After 2 hours of treatment, a white fatty acid-zinc complex film layer appeared on the zinc surface. Hydrophobic state, the surface contact angle is 152.5±3° (see image 3 ).

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Abstract

The invention relates to technology for preparing a super-hydrophobic surface, in particular to a simple and convenient method for preparing a super-hydrophobic film on the surface of a metal matrix. The super-hydrophobic film is prepared by the following steps of: cleaning the surface of the metal matrix with ethanol and de-ionized water and drying the surface of the metal matrix for later use; applying current or voltage to the cleaned matrix and a platinum electrode serving as a cathode in 10<-1> to 1mol/L ethanol solution of fatty acid CH3(CH2)nCOOH (n is equal to 10 to 16) by an electrochemical method; and forming a fatty acid-metal complex film on the surface of the anodic metal matrix after processing and drying the film to obtain the super-hydrophobic film. The method has the advantages of simple and easy operation and no need of expensive equipment. The prepared super-hydrophobic surface is expected to be applied to the fields of metal corrosion resistance, water resistance, self-cleaning and the like.

Description

technical field [0001] The invention relates to a super-hydrophobic surface preparation technology, in particular to a convenient method for preparing a super-hydrophobic film on the surface of a metal substrate. Background technique [0002] Wetting performance is an important feature of solid surfaces. It is generally believed that the contact angle of water on a solid surface is greater than 150°, and the surface is in a superhydrophobic state. Practice has proved that the superhydrophobic surface not only has the function of self-cleaning, but also has the functions of anti-current conduction, anti-corrosion, waterproof, anti-fog, anti-pollution and so on. Therefore, it has broad application prospects in the fields of liquid transportation and microanalysis. [0003] The study found that micro / nanoscale rough structure and low surface free energy are two necessary conditions for constructing superhydrophobic surfaces. Based on this theory, researchers have proposed a v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/00
Inventor 王鹏张盾
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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