Method for constructing superhydrophobic aluminum surface with high stability

A super-hydrophobic, high-stability technology, applied in the field of materials science, can solve the problems of poor super-hydrophobic stability and easy shedding of substances, and achieve the effects of improving anti-corrosion performance, easy operation, and easy industrialization

Inactive Publication Date: 2015-03-25
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for constructing a highly stable superhydrophobic aluminum surface, and the method for constructing a highly stable superhydrophobic aluminum surface should solve the problems of the aluminum sheet surface in the prior art The disadvantages of low surface energy substances are easy to fall off, and the superhydrophobic stability is poor

Method used

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  • Method for constructing superhydrophobic aluminum surface with high stability
  • Method for constructing superhydrophobic aluminum surface with high stability

Examples

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Embodiment 1

[0020] First, the aluminum sheet (the aluminum element content is 99,99%) is ultrasonically cleaned with acetone and ethanol in sequence, and rinsed with deionized water and dried. Then immerse in 1mol / L sodium hydroxide aqueous solution for 60s, take it out, rinse it with deionized water, and blow dry, then immerse it in 10% nitric acid solution for 60s, take it out and rinse it with deionized water , blow dry. Prepare a 3mol / L phosphoric acid solution as the electrolyte, then use the aluminum plate as the anode and the lead plate as the cathode to carry out the reaction. The reaction temperature was controlled at 0°C, the constant voltage was 40V, and the reaction time was 15 minutes. Wash the reacted aluminum sheet with deionized water and dry it; soak it in ammonia water with a mass fraction of 35% for 3 hours, take it out and rinse it with deionized water and dry it; finally, immerse the aluminum sheet in 3mM / L stearin Aluminum flakes with superhydrophobicity can b...

Embodiment 2

[0022] First, the aluminum sheet (the aluminum element content is 99,99%) is ultrasonically cleaned with acetone and ethanol in sequence, and rinsed with deionized water and dried. Then immerse in 1mol / L sodium hydroxide aqueous solution for 60s, take it out, rinse it with deionized water, and blow dry, then immerse it in 10% nitric acid solution for 60s, take it out and rinse it with deionized water , blow dry. Prepare a 2.6mol / L phosphoric acid solution as the electrolyte, then use the aluminum plate as the anode and the lead plate as the cathode to carry out the reaction. The reaction temperature was controlled at 0°C, the constant voltage was 38V, and the reaction time was 15 minutes. Wash the reacted aluminum sheet with deionized water and dry it; soak it in ammonia water with a mass fraction of 35% for 3.5 hours, take it out and rinse it with deionized water and dry it; finally, immerse the aluminum sheet in 3mM / L hard The superhydrophobic aluminum flakes can be p...

Embodiment 3

[0024] First, the aluminum sheet (the aluminum element content is 99,99%) is ultrasonically cleaned with acetone and ethanol in sequence, and rinsed with deionized water and dried. Then immerse in 1mol / L sodium hydroxide aqueous solution for 60s, take it out, rinse it with deionized water, and blow dry, then immerse it in 10% nitric acid solution for 60s, take it out and rinse it with deionized water , blow dry. Prepare a 2.6mol / L phosphoric acid solution as the electrolyte, then use the aluminum plate as the anode and the lead plate as the cathode to carry out the reaction. The reaction temperature was controlled at 0°C, the constant voltage was 40V, and the reaction time was 30min. Wash the reacted aluminum sheet with deionized water and dry it; soak it in ammonia water with a mass fraction of 35% for 3 hours, take it out and rinse it with deionized water and dry it; finally, immerse the aluminum sheet in 3mM / L stearin Aluminum flakes with superhydrophobicity can be p...

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Abstract

The invention discloses a method for constructing a superhydrophobic aluminum surface with high stability. The method comprises the steps of ultrasonically cleaning an aluminum sheet by sequentially using acetone and ethanol under the condition of room temperature, then, flushing with deionized water, next, carrying out alkali corrosion on the aluminum sheet in a sodium hydroxide solution, flushing with deionized water, and finally, carrying out acid corrosion on the aluminum sheet in a nitric acid solution; electrolyzing in a phosphoric acid solution by taking the pretreated aluminum sheet as an anode and a lead plate as a cathode, and keeping the electrolyte at constant temperature to generate an aluminum oxide film on the surface of the electrolyte; immersing the treated aluminum sheet into an ammonia water solution to corrode the aluminum sheet by using ammonia water; and immersing the treated aluminum sheet into an n-hexane mixed solution composed of stearic acid and dicyclohexylcarbodiimide, soaking for 10-30 hours, taking out the product, and flushing the product with n-hexane to obtain a superhydrophobic aluminum sheet. After superhydrophobic metal aluminum obtained by using the method disclosed by the invention is placed for 4 months, the contact angle of the superhydrophobic metal aluminum is not changed, and the rolling angle of the superhydrophobic metal aluminum is smaller than 5 degrees; in addition, the superhydrophobic metal aluminum not only has favorable superhydrophobicity and self-cleaning function, but also has very strong corrosion resistance.

Description

technical field [0001] The invention belongs to the field of materials science, and in particular relates to a superhydrophobic material, in particular to a method for constructing a highly stable superhydrophobic aluminum surface. Background technique [0002] Aluminum is an extremely abundant metal element on the earth, and its reserves rank second among metals. It was not until the end of the 19th century that aluminum emerged as a competitive metal in engineering applications and was all the rage. The development of the three important industries of aviation, construction, and automobile requires that the material properties have the unique properties of aluminum and its alloys, which greatly facilitates the production and application of this new metal-aluminum. However, the metal surface obtained by commonly used aluminum alloy surface treatment methods is not self-cleaning and is easily polluted, and its long-term protection performance in corrosive solution envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/16C25D11/24
CPCC25D11/08C25D11/16C25D11/24
Inventor 张全生张建辉雷天辉程素贞尹佳佳马可黄海军贾李李张伟
Owner SHANGHAI INST OF TECH
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