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Method for quickly preparing super hydrophobic membrane

A super-hydrophobic and fast technology, used in devices, coatings, special surfaces, etc. for coating liquid on the surface, which can solve the problem of different components of etching liquid, and achieve the effect of simple and easy operation.

Active Publication Date: 2015-05-27
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, for the chemical etching method, the composition of the etching solution is different for different substrates, while the electrochemical deposition method can only be applied to the surface of the conductor.

Method used

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  • Method for quickly preparing super hydrophobic membrane
  • Method for quickly preparing super hydrophobic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Polish the magnesium alloy sample with sandpaper, then wash it with ethanol and deionized water in turn, and dry it with nitrogen gas for later use.

[0019] 2) Soak the above sample in 0.5M hexamethylene diisocyanate trimer / ethyl acetate solution at room temperature for 5s, then take out the sample and dry it with nitrogen. After blowing dry, soak the sample in 0.1M dodecylamine / ethyl acetate solution at room temperature for 5s. After soaking, take out the sample and wash it with ethanol to dry it, so that a superhydrophobic film is formed on the surface of the sample. The film layer is in a super-hydrophobic state, and the contact angle of water on its surface is 156.3±3° (see figure 1 ).

Embodiment 2

[0021] 1) Clean the glass piece with ethanol and deionized water in sequence, and dry it with nitrogen gas for later use.

[0022] 2) Soak the above sample in 0.2M hexamethylene diisocyanate trimer / ethyl acetate solution at room temperature for 5s, then take out the sample and dry it with nitrogen. After drying, soak the sample in 0.2M dodecylamine / ethyl acetate solution at room temperature for 5s, take out the sample after soaking, wash and dry with ethanol, and then form a superhydrophobic film on the surface of the sample. The film layer is in a super-hydrophobic state, and the contact angle of water on its surface is 156.3±3° (see figure 2 ).

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Abstract

The invention relates to preparation of a super hydrophobic membrane, and specifically relates to a general method for quickly preparing a super hydrophobic membrane layer on a solid surface. The method comprises the steps of sequentially immersing a processed surface sample into a hexamethylene diisocyanate tripolymer / ethyl acetate solution and a lauryl amine / ethyl acetate solution in sequence; washing the immersed sample with an organic solvent; drying by the air to form the super hydrophobic membrane on the sample surface. The method is simple and easy to be carried out; expensive devices are not used; the membrane layer can be prepared within a short time; the prepared super hydrophobic surface can be applied to the metal corrosion resisting, waterproofing and self-cleaning and other fields.

Description

technical field [0001] The invention relates to the preparation of a super-hydrophobic film, in particular to a general method for rapidly preparing a super-hydrophobic film layer on a solid surface. 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. The surface of the lotus leaf in nature is a typical example of superhydrophobicity. On the surface of the lotus leaf, water droplets can roll freely, and when rolling, they can take away pollutants such as dust attached to the surface, so that the surface can be kept clean. The study found that the superhydrophobicity of the lotus leaf surface is caused by the hierarchical structure of the combination of microstructure and nanostructure on the surface and the existence of waxy substances on the surface. Practice has proved that the superhydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D7/24
Inventor 王鹏张盾
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI