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Preparation method of high-hydrophobicity and low-adhesion aluminum surface

A low adhesion, aluminum surface technology, applied in the direction of metal material coating process, etc., can solve the problems of complicated process, high cost, limited material matrix, etc., and achieve the effect of simple operation, improved hydrophobic performance, and simple and easy method

Inactive Publication Date: 2017-03-22
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of limited material matrix, complex process or high cost in the prior art, and provide a method for preparing a highly hydrophobic and low-adhesion aluminum surface. The preparation method of the present invention has the advantages of simple method and easy operation. processing, lower cost and other advantages

Method used

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  • Preparation method of high-hydrophobicity and low-adhesion aluminum surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Sand the aluminum substrate with a size of 20*20*2mm, ultrasonically clean it, and dry it in a drying oven to remove the oxide layer on the surface;

[0022] Prepare the surface micro-nano structure: put the pretreated aluminum base into 0.8mol / L hydrochloric acid solution, place the aluminum base in the solution for etching for 17 hours at room temperature, then ultrasonically clean and dry in a drying oven; then place Etched in 0.8mol / L cupric chloride solution for 3 minutes, then cleaned with ultrasonic and dried in oven.

[0023] Low surface energy: Put the etched aluminum base into the prepared 0.5mol / L stearic acid absolute ethanol solution, modify the aluminum base in a water bath at 53°C for 1 hour, and then place it in a drying oven Dry and solidify at 95°C for 30 minutes. The treated aluminum substrate is subjected to a drop test with a contact angle measuring instrument to measure the contact angle of static water droplets on the surface of the aluminum subst...

Embodiment 2

[0025] Sand the aluminum substrate with a size of 20*20*2mm, ultrasonically clean it, and dry it in a drying oven to remove the oxide layer on the surface;

[0026] Prepare the surface micro-nano structure: put the pretreated aluminum substrate into 0.8mol / L hydrochloric acid solution, place the aluminum substrate in the solution for etching for 18 hours at room temperature, then ultrasonically clean it and dry it with a drying oven; then place Etched in 0.8mol / L cupric chloride solution for 3 minutes, then cleaned with ultrasonic and dried in oven.

[0027] Low surface energy: Put the etched aluminum base into the prepared 0.5mol / L stearic acid absolute ethanol solution, modify the aluminum base in a water bath at 53°C for 1 hour, and then place it in a drying oven Dry and solidify at 95°C for 30 minutes, and use a contact angle measuring instrument to conduct a drop test on the treated aluminum substrate to measure the contact angle of static water droplets on the surface of...

Embodiment 3

[0029] Sand the aluminum substrate with a size of 20*20*2mm, ultrasonically clean it, and dry it in a drying oven to remove the oxide layer on the surface;

[0030] Prepare the surface micro-nano structure: put the pretreated aluminum base into 0.8mol / L hydrochloric acid solution, etch the aluminum base in the solution for 20 hours at room temperature, then ultrasonically clean it and dry it in a drying oven; Etched in 0.8mol / L cupric chloride solution for 3 minutes, then cleaned with ultrasonic and dried in oven.

[0031] Low surface energy: Put the etched aluminum base into the prepared 0.5mol / L stearic acid absolute ethanol solution, modify the aluminum base in a water bath at 53°C for 1 hour, and then place it in a drying oven After drying and curing at 95°C for 30 minutes, the treated aluminum substrate was subjected to a drop test using a contact angle measuring instrument to measure the contact angle of static water droplets on the surface of the aluminum substrate. The...

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Abstract

The invention relates to a preparation method of a high-hydrophobicity and low-adhesion aluminum surface. The method includes the steps that a hydrochloric acid solution and a copper chloride solution are adopted for two-step etching, a micro-nano composite structure is prepared on an aluminum surface, then a stearic acid ethanol solution is used for treatment, surface energy is reduced, and the aluminum surface with a hydrophobic effect is obtained. The treatment method is simple, easy to carry out and convenient to operate, and the contact angle can reach 150 degrees to the maximum degree.

Description

technical field [0001] The invention relates to metal surface modification technology, in particular to a method for preparing a highly hydrophobic and low-adhesion aluminum surface. Background technique [0002] With the continuous development of bionics, various phenomena in nature are gradually known to people. During this process, people have discovered that the surfaces of some animals and plants have self-cleaning phenomena, the most typical of which is the "lotus leaf effect": when rainwater falls on the surface of the lotus leaf, it will gather and roll freely, and at the same time, the water attached to the surface will Dust and other pollutants are taken away, so as to achieve the effect of surface self-cleaning. This kind of phenomenon also occurs on the surface of rice leaves. Therefore, many researchers have begun to devote themselves to the research of these phenomena and their surface structures. [0003] Aluminum is extremely common among metals, and it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/20C23F1/14C23C22/02
CPCC23F1/20C23C22/02C23F1/14
Inventor 叶霞姚爱斐黄超杨晓红范振敏刘群超
Owner JIANGSU UNIV OF TECH
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