Method for preparing metal carboxylate super-hydrophobic coating on surface of metal

A metal carboxylate, super-hydrophobic coating technology, applied in the direction of metal material coating process, can solve the problems of lengthy process, unfavorable materials for large-scale production, etc., and achieve the effect of broadening the scope of application, low price, and rapid response

Inactive Publication Date: 2012-02-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is because most of the existing technologies require lengthy processes, expensive materials and other factors that are not conducive to mass production

Method used

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  • Method for preparing metal carboxylate super-hydrophobic coating on surface of metal
  • Method for preparing metal carboxylate super-hydrophobic coating on surface of metal
  • Method for preparing metal carboxylate super-hydrophobic coating on surface of metal

Examples

Experimental program
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Effect test

example 1

[0037] (1) Surface treatment of pure copper plate. Sand with 600 grit metallographic sandpaper to remove the surface oxide layer, then rinse with distilled water and dry.

[0038] (2) Dip the pure copper plate in 99% ethyl acetate solution and ultrasonically clean it for 10 minutes to remove surface oil, then wash it with distilled water and dry it.

[0039] (3) with 1.7gCuCl 2 2H 2 Prepare a 0.1 mol / L solution of O with 100 mL of 99.7% ethanol solution. Apply the prepared solution to the treated pure copper plate.

[0040] (4) Immerse the pure copper plate coated with the solution in water for several minutes, take it out and dry it at room temperature for 2 hours to obtain a superhydrophobic coating. The contact angle is about 170° and the rolling angle is less than 2°.

example 2

[0042] (1) Surface treatment of the iron plate. Sand with 240-grit metallographic sandpaper to remove the surface oxide layer, then rinse with distilled water and dry.

[0043] (2) Dip the metal plate in 99% ethyl acetate solution and ultrasonically clean it for 20 minutes to remove surface oil, then wash it with distilled water and dry it.

[0044] (3) with 5.5g FeCl 3 ·6H 2 Prepare a 0.2 mol / L solution of O and 100 mL of ethanol with a mass fraction of 99.7%. Apply the prepared solution to the treated iron plate.

[0045] (4) Immerse the iron plate coated with the solution in water for several minutes, take it out and dry it at room temperature for 2 hours to obtain a super-hydrophobic coating. The contact angle is about 165° and the rolling angle is less than 2°.

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Abstract

The invention relates to a method for preparing a metal carboxylate super-hydrophobic coating on the surface of a metal. The method is characterized by comprising the following steps of: preparing an ethanol reaction solution by using metal salt, fatty acid and ethanol, polishing a metal plate to remove a surface oxide layer, cleaning the metal plate by using distilled water, and drying the metal plate; soaking the metal plate into an ethyl acetate solution, performing ultrasonic cleaning, cleaning the metal plate by using distilled water and drying the metal plate; uniformly coating the prepared solution on the surface of the treated metal plate by using a coating tool such as a spray gun or absorbent cotton and the like; and soaking the metal plate coated with the solution into deionized water, cleaning the metal plate, taking out the metal plate, airing the metal plate at room temperature, and thus obtaining the metal carboxylate super-hydrophobic coating. According to the preparation method, only the reaction solution is coated on the surface of the metal plate. The raw materials adopted in the method are common and cheap, so the cost of preparing the super-hydrophobic coating is greatly reduced. Moreover, the method can be used for preparing the super-hydrophobic coating on the surfaces of multiple metals, so that the application range of the super-hydrophobic coating is broadened, and the scale production has market value.

Description

technical field [0001] The invention relates to a method for preparing a metal carboxylate superhydrophobic coating on a metal surface, belonging to the fields of functional materials, metal surface modification and protection. Background technique [0002] The solid surface has a certain surface energy, and the surface energy directly affects the wettability of the solid to the liquid. This wettability is characterized by Young's equation. On an ideal solid surface (uniform structure and composition), the contact angle has a specific value and is determined by the surface tension, satisfying Young’s equation [0003] cosθ=(γ sg -γ sl ) / γ lg [0004] γsg, γsl, and γlg are the interfacial tension between solid-gas, solid-liquid, and gas-liquid, respectively. [0005] Practical solid surfaces are to some extent rough or uneven in composition. Therefore, the measured contact angle is quite different from the result calculated by Young's equation. In the 1940s, Wenzel and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/02
Inventor 耿兴国李峰赵磊陈志
Owner NORTHWESTERN POLYTECHNICAL UNIV
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