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Method for etching and preparing ultra-hydrophobic aluminum surface by using saline solution containing copper ions and chloride ions

A technology of chloride ion and salt solution, which is applied to the device for coating liquid on the surface, special surface, coating, etc. It can solve the problems of complex equipment and technology, dangerous chemical reagents, low processing efficiency, etc., and achieve stable hydrophobic performance, Easy operation and high processing efficiency

Inactive Publication Date: 2012-09-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the above methods can achieve superhydrophobicity on the surface of aluminum and its alloys, these methods either require complex equipment and processes, or require dangerous chemical reagents, and generally have low processing efficiency and high pollution.

Method used

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  • Method for etching and preparing ultra-hydrophobic aluminum surface by using saline solution containing copper ions and chloride ions
  • Method for etching and preparing ultra-hydrophobic aluminum surface by using saline solution containing copper ions and chloride ions
  • Method for etching and preparing ultra-hydrophobic aluminum surface by using saline solution containing copper ions and chloride ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The 30 × 40 × 2 mm aluminum plate was polished with 1200# and 1500# sandpaper to remove the oxide layer and impurities on the surface. The polished aluminum plate was ultrasonically cleaned with absolute ethanol and deionized water in sequence, and dried. Then immerse the cleaned aluminum plate in an aqueous solution containing 1 mol / L copper chloride for 10 s, the copper ions and aluminum on the surface of the aluminum plate undergo a substitution reaction, the aluminum is corroded into aluminum ions, and the copper ions are reduced to copper and deposited on the aluminum plate. On the surface, after the aluminum plate is taken out, the deposited copper is cleaned with an ultrasonic cleaner and dried. Finally, soak the dried aluminum plate in a 1% fluorosilane ethanol solution for 1 h, take it out and put it in an oven at 100 °C for 10 min. Scanning electron microscopy showed that the surface of superhydrophobic aluminum had a rough structure composed of micro-nano-sc...

Embodiment 2

[0024] The 30 × 40 × 2 mm aluminum plate was polished with 1200# and 1500# sandpaper to remove the oxide layer and impurities on the surface. The polished aluminum plate was ultrasonically cleaned with absolute ethanol and deionized water in sequence, and dried. Then soak the cleaned aluminum plate in an aqueous solution containing 1 mol / L copper sulfate and 2 mol / L sodium chloride for 30 s. On the surface of the aluminum plate, the copper ions and aluminum undergo substitution reactions, and the aluminum corrodes into aluminum ions, and the copper ions It is reduced to copper and deposited on the aluminum surface. After the aluminum plate is taken out, the deposited copper is cleaned with an ultrasonic cleaner and dried. Finally, soak the dried aluminum plate in a 1% fluorosilane ethanol solution for 1 h, take it out and put it in an oven at 100 °C for 10 min. Scanning electron microscopy showed that the surface of superhydrophobic aluminum had a rough structure composed of ...

Embodiment 3

[0026] The 30 × 40 × 2 mm aluminum plate was polished with 1200# and 1500# sandpaper to remove the oxide layer and impurities on the surface. The polished aluminum plate was ultrasonically cleaned with absolute ethanol and deionized water in sequence, and dried. Then soak the cleaned aluminum plate in an aqueous solution containing 1 mol / L copper nitrate and 2 mol / L sodium chloride for 35 s. On the surface of the aluminum plate, copper ions and aluminum undergo substitution reactions, aluminum corrodes into aluminum ions, and copper ions are reduced to Copper is formed and deposited on the aluminum surface. After the aluminum plate is taken out, the deposited copper is cleaned with an ultrasonic cleaner and dried. Finally, soak the dried aluminum plate in a 1% fluorosilane ethanol solution for 1 h, take it out and put it in an oven at 100 °C for 10 min. Scanning electron microscopy showed that the surface of superhydrophobic aluminum had a rough structure composed of micro-na...

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Abstract

The invention discloses a method for etching and preparing an ultra-hydrophobic aluminum surface by using a saline solution containing copper ions and chloride ions. The method comprises the steps that firstly an aluminum plate is polished and is additionally cleaned to remove oil; afterwards, the oil-removed aluminum plate is soaked in the saline solution containing the copper ions and the chloride ions for a certain time, and after the aluminum plate is taken out, deposited copper is cleaned by using an ultrasonic cleaner and the aluminum plate is dried; and finally, the etched aluminum plate is soaked in an ethanol solution containing a low surface energy material for 1h, and after the etched aluminum plate is taken out and is dried, the ultra-hydrophobic aluminum surface can be obtained. The method has the advantages that complex and expensive equipment is not needed, the process is simple, the repeatability is good, the obtained ultra-hydrophobic aluminum surface has excellent hydrophobic performance, contact angles of water drops on the ultra-hydrophobic aluminum surface exceed 160 DEG and rolling angles of the water drops are smaller than 2 DEG.

Description

technical field [0001] The invention belongs to the technical field of metal surface modification, and relates to a preparation method for quickly constructing superhydrophobicity on the surface of aluminum and its alloys. Background technique [0002] Wettability is one of the important properties of a solid surface. It is often measured by contact angle. When the contact angle is less than 90°, it is a hydrophilic surface, when it is less than 5°, it is a superhydrophilic surface, and when it is greater than 90°, it is a hydrophobic surface. is a superhydrophobic surface. In nature, superhydrophobic phenomena can be seen everywhere: leaves of plants such as lotus leaves and rice leaves have a self-cleaning effect, water striders can stand on the surface of water effortlessly, and butterfly wings can not get wet in the rain. Superhydrophobic surfaces have the characteristics of self-cleaning, drag reduction, corrosion resistance, and anti-icing and frosting. Metal material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/14B05D5/08
Inventor 徐文骥宋金龙刘新陆遥王续跃
Owner DALIAN UNIV OF TECH
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