Method for manufacturing submicron/micron aluminum mold plate

A sub-micron, composite aluminum technology, applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of high cost, complicated equipment and process, difficult to obtain, etc., to achieve convenient operation, suitable for large-scale production, Accessible Effects

Inactive Publication Date: 2014-07-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a method for preparing submicron/micron composite aluminum templates for the disadvantages of difficult acquisition of raw ma...

Method used

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  • Method for manufacturing submicron/micron aluminum mold plate
  • Method for manufacturing submicron/micron aluminum mold plate
  • Method for manufacturing submicron/micron aluminum mold plate

Examples

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Embodiment 1

[0026] A method for preparing a submicron / micron composite aluminum template, comprising the steps of:

[0027] (1) Cleaning high-purity aluminum flakes with a mass fraction ≥ 99.99% in absolute ethanol and deionized water to obtain clean aluminum flakes;

[0028] (2) With the clean aluminum flake obtained in step (1) as the anode and the graphite as the cathode, carry out constant voltage electrochemical polishing in a mixed solution with a volume ratio of perchloric acid and absolute ethanol of 0.2 at 0° C., and the voltage is 23V , the polishing time is 5 minutes to obtain a polished aluminum sheet;

[0029] (3) the aluminum flake of polishing that obtains with step (2) is anode, and graphite is cathode, and the volume ratio of solution A (0.4mol / L oxalic acid aqueous solution) and solution B (dehydrated alcohol) is the mixing of A:B=2.1 solution to carry out the anodizing process at -5°C, figure 1 Be the voltage curve and current density curve figure of aluminum anod...

Embodiment 2

[0032]A method for preparing a submicron / micron composite aluminum template, comprising the steps of:

[0033] (1) Cleaning high-purity aluminum flakes with a mass fraction ≥ 99.99% in absolute ethanol and deionized water to obtain clean aluminum flakes;

[0034] (2) With the clean aluminum flake obtained in step (1) as the anode and the graphite as the cathode, carry out constant voltage electrochemical polishing in a mixed solution whose volume ratio of perchloric acid and absolute ethanol is 0.25 at 0° C., and the voltage is 21V , the polishing time is 6 minutes to obtain a polished aluminum sheet;

[0035] (3) the polished aluminum sheet that obtains with step (2) is anode, and graphite is cathode, and the volume ratio of solution C (0.15mol / L oxalic acid aqueous solution) and solution B (dehydrated alcohol) is the mixing of C:B=10 solution to carry out anodic oxidation process, the temperature is 0 ℃: first use constant current density boost, set the current density ...

Embodiment 3

[0038] A method for preparing a submicron / micron composite aluminum template, comprising the steps of:

[0039] (1) Cleaning high-purity aluminum flakes with a mass fraction ≥ 99.99% in absolute ethanol and deionized water to obtain clean aluminum flakes;

[0040] (2) With the clean aluminum sheet that step (1) obtains as anode, graphite is cathode, carry out constant voltage electrochemical polishing in the mixed solution that the volume ratio of perchloric acid and dehydrated alcohol is 0.3 under 0 ℃, voltage is 15V , the polishing time is 7 minutes to obtain a polished aluminum sheet;

[0041] (3) the aluminum flake of polishing that obtains with step (2) is anode, and graphite is cathode, and the volume ratio of solution D (0.32mol / L oxalic acid aqueous solution) and solution B (dehydrated alcohol) is the mixing of D:B=0.95 solution to carry out anodic oxidation process, the temperature is 5 ℃: first use constant current density boost, set the current density to 65mA ...

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Abstract

The invention discloses a method for preparing a submicron/micron aluminum mold plate. The method comprises the following steps: sequentially putting a high-purity aluminum piece into absolute ethyl alcohol and deionized water for washing, subsequently polishing in an electrochemical mode, performing anode oxidation by taking the polished aluminum piece as an anode, graphite as a cathode and an oxalic acid-ethanol-water mixture solution as electrolyte, so as to obtain a porous aluminum oxide film with an aluminum substrate, regulating anode oxidation conditions such as the voltage and the current density to enter a submicron-order structure unit into a competitive growth mode, so as to form a micron-order structural unit cluster, and putting the porous aluminum oxide film with the aluminum substrate into a mixture solution of chromium trioxide and phosphoric acid for removing the film, thereby obtaining the aluminum mold plate with submicron/micron composite pits in the surface. The method has the advantages that the raw materials are easily available, the cost is low, the equipment is simple, the operation is convenient, the controllability is good and the like, and the feasibility that the method is applied to production is greatly improved.

Description

technical field [0001] The invention relates to a method for preparing a submicron / micron composite aluminum template, in particular to a method for preparing an aluminum template with a submicron / micron composite microstructure by using an anodic oxidation process of aluminum and a subsequent film removal process. Background technique [0002] There are many natural submicron / micron composite structures in nature, such as the surface of lotus leaves, the surface of butterfly wings, the skin of sharks, and the legs of water striders. Artificially synthesized submicron / micron composite structure materials have been widely used in many disciplines and fields such as superhydrophobicity and bionics because of their excellent properties, and have become one of the research hotspots in the field of functional materials research. At present, the methods for preparing submicron / micron composite structure materials are mainly direct synthesis method and template method. Compared wit...

Claims

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Application Information

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IPC IPC(8): C25D11/04C25D11/24
Inventor 李屹覃玉燕凌志远
Owner SOUTH CHINA UNIV OF TECH
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