Preparation method for porous aluminium oxide bionic multilayer dewatering surface

A porous alumina and hydrophobic surface technology, which is applied in the direction of superimposed layer plating, surface reaction electrolytic coating, coating, etc., can solve the problems of complex manufacturing process, irregular pore size, poor hydrophobic performance, etc., and achieve simple process, Low cost and uniform pore size

Inactive Publication Date: 2015-11-11
CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to provide a porous alumina biomimetic multi-layer hydrophobic surface in view of the disadvantages of poor hydrophobic performance of the current porous alumina surface material, irregular pore size, and relatively complicated surface modification process and high cost. The preparation method of the method is to electropolish the treated aluminum sheet after degreasing, and then oxidize twice, soak the prepared alumi

Method used

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Embodiment Construction

[0017] Cut 400~500g aluminum flakes into small pieces of 1cm×2cm with a gas cutter, anneal for 1~2h in a high-purity nitrogen environment at 500~600°C, take them out, and roll them flat with a metal roller, and dissolve them in the mass fraction Add 700-800mL of deionized water twice to 30-40% acetone solution, put it into a digitally controlled ultrasonic cleaner for 10-15 minutes of ultrasonic treatment to remove the grease on the surface of the aluminum sheet, the ultrasonic frequency is 30-40kHz, and the power is 10-15W; Immerse the degreased aluminum sheet in a sodium hydroxide solution with a mass fraction of 10-20% for 5-10 minutes to remove the surface alumina, then rinse with deionized water and ethanol solution for 3-5 minutes in turn, and then dry it with nitrogen; At 4-6°C, the treated aluminum sheet is connected to the anode, and the ordinary aluminum sheet is connected to the cathode, and placed in a mixture of perchloric acid and ethanol with a volume ratio of 1:...

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Abstract

The invention relates to preparation of a porous aluminium oxide bionic multilayer dewatering surface, belonging to the field of thin films. The invention aims to solve the technical problems that the current process for preparing a porous aluminium oxide dewatering thin film is relatively complex; the cost is high; and the range of a thin film substrate is limited by the preparation method of chemical etching, so that a preparation method for the porous aluminium oxide bionic multilayer dewatering surface is provided. According to the method, a degreased and processed aluminium sheet is subjected to electropolishing, and then is subjected to oxidation for twice; a prepared aluminium oxide film is soaked; a reducing agent is added; an aired aluminium/argentum oxide multilayer film is soaked in an ethanol solution of perfluorodecanethiol; and then the film is taken out and blow-dried by nitrogen so as to obtain the porous aluminium oxide bionic multilayer dewatering surface. The method is simple in process and low in cost; the prepared porous aluminium oxide dewatering thin film has good heat resistance, chemical stability and high mechanical strength and dimensional stability, and can be widely promoted for use.

Description

technical field [0001] The invention relates to a method for preparing a porous alumina biomimetic multilayer hydrophobic surface, belonging to the field of hydrophobic materials. Background technique [0002] With the continuous improvement of people's requirements for material properties, the research on materials with hydrophobic properties has become a new hot spot in recent years. Hydrophobic transparent coating materials have low surface free energy, so they have many unique surface properties, such as self-cleaning, anti-fouling, hydrophobic and oleophobic, etc., and are widely used in many fields such as national defense, industrial and agricultural production, and daily life. And important research and application value. Using such materials on the glass surface to make self-cleaning glass can be used as windshields for automobiles, airplanes, spacecraft, etc., which can not only reduce the pollution of pollutants such as dust in the air, but also make it suitable ...

Claims

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Application Information

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IPC IPC(8): C23C28/00C25D11/12C23C18/44
Inventor 雷思宇王志慧林大伟
Owner CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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