Large-hole-pitch anodized aluminum oxide film based on parabolic equation boosting and preparation method and application of large-hole-pitch anodized aluminum oxide film

An anodized aluminum oxide and anodic oxidation technology, applied in the direction of anodic oxidation, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems of undetermined boosting time, unfavorable anodized aluminum oxide film, uneven reaction rate, etc., to achieve Avoid ablation phenomenon, strong flexibility and adaptability, clear effect of boost time

Active Publication Date: 2022-04-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But using the constant current method to boost the voltage, the law of the voltage rise is not obvious, so the specific boosting time cannot be determined. In order to avoid too strong reaction, a smaller current density is often used, which makes the boosting time too long, and in In the later stage of boosting, due to the uneven reaction rate on the surface of the aluminum sheet, the voltage fluctuation range is large, which makes it difficult to determine whether the target voltage is reached and when to switch to the constant voltage method, and the voltage is unstable. It is also not conducive to the formation of regular anodized aluminum oxide film

Method used

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  • Large-hole-pitch anodized aluminum oxide film based on parabolic equation boosting and preparation method and application of large-hole-pitch anodized aluminum oxide film
  • Large-hole-pitch anodized aluminum oxide film based on parabolic equation boosting and preparation method and application of large-hole-pitch anodized aluminum oxide film
  • Large-hole-pitch anodized aluminum oxide film based on parabolic equation boosting and preparation method and application of large-hole-pitch anodized aluminum oxide film

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Experimental program
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Effect test

Embodiment 1

[0035] Step 1. Place 5cm×2cm aluminum foil successively in deionized water, acetone and absolute ethanol for ultrasonic cleaning for 15 minutes each to remove the oil stains adhering to the surface; then soak the cleaned aluminum foil in 1mol / L sodium hydroxide solution Etched for 5min.

[0036] Step II, the clean aluminum foil treated in step I is used as the anode, and the graphite sheet is used as the cathode, and placed in a polishing solution (a mixed solution of perchloric acid and ethanol with a volume ratio of 1:5), at 0°C and a constant voltage of 20V , polished for 5 minutes, and finally rinsed with deionized water to obtain an aluminum foil with a smooth mirror surface.

[0037]Step III, the specular aluminum foil obtained through step II is used as an anode, and the graphite sheet is a cathode, and a mixed solution of 0.3mol / L oxalic acid and ethanol (the volume ratio of oxalic acid and ethanol is 1:1) is used as an electrolyte, and the temperature of the solution ...

Embodiment 2

[0042] Step 1. Place 5cm×5cm aluminum foil successively in deionized water, acetone and absolute ethanol for ultrasonic cleaning for 15 minutes each to remove the oil stains adhering to the surface; then soak the cleaned aluminum foil in 1mol / L sodium hydroxide solution Etched for 5min.

[0043] Step II, the clean aluminum foil treated in step I is used as the anode, and the graphite sheet is used as the cathode, and placed in a polishing solution (a mixed solution of perchloric acid and ethanol with a volume ratio of 1:5), at 0°C and a constant voltage of 20V , polished for 5 minutes, and finally rinsed with deionized water to obtain an aluminum foil with a smooth mirror surface.

[0044] Step III, the mirror surface aluminum foil obtained through step II is used as the anode, the graphite sheet is the cathode, and the mixed solution of 0.3mol / L oxalic acid solution and ethanol (the volume ratio of oxalic acid and ethanol is 1:1) is used as the electrolyte, and the temperatur...

Embodiment 3

[0047] Step 1. Place 5cm×5cm aluminum foil successively in deionized water, acetone and absolute ethanol for ultrasonic cleaning for 15 minutes each to remove the oil stains adhering to the surface; then soak the cleaned aluminum foil in 1mol / L sodium hydroxide solution Etched for 5min.

[0048] Step II, the clean aluminum foil treated in step I is used as the anode, and the graphite sheet is used as the cathode, and placed in a polishing solution (a mixed solution of perchloric acid and ethanol with a volume ratio of 1:5), at 0°C and a constant voltage of 20V , polished for 5 minutes, and finally rinsed with deionized water to obtain an aluminum foil with a smooth mirror surface.

[0049] Step III, the mirror-faced aluminum foil obtained through step II is used as the anode, the graphite sheet is the cathode, and the mixed solution of 0.3mol / L oxalic acid solution and ethanol (the volume ratio of oxalic acid and ethanol is 1:2) is used as the electrolyte, and the temperature ...

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Abstract

The invention belongs to the technical field of material surface preparation, and discloses a large-hole-pitch anodized aluminum oxide film based on parabolic equation boosting and a preparation method and application of the large-hole-pitch anodized aluminum oxide film. The preparation method comprises the following steps: ultrasonically cleaning the surface of a high-purity aluminum foil, and chemically etching to remove a compact oxide layer on the aluminum surface; performing electrochemical polishing treatment on the clean aluminum foil to enable the surface to be smooth and flat; carrying out anodic oxidation in electrolyte by taking the obtained polished aluminum foil as an anode and a graphite flake as a cathode, and boosting based on a parabolic equation in the process, so as to obtain a large-hole-pitch anodic aluminum oxide film with an aluminum substrate; the obtained large-hole-pitch anodic aluminum oxide film with the aluminum substrate is placed in a supersaturated copper chloride solution to be etched, the aluminum substrate is removed, and the large-hole-pitch anodic aluminum oxide film is obtained; or etching in a chromic acid and phosphoric acid mixed solution, removing the anodic aluminum oxide film to obtain an aluminum substrate with large-hole-pitch pits, and then performing secondary anodic oxidation to obtain the regular and ordered large-hole-pitch anodic aluminum oxide film.

Description

technical field [0001] The invention belongs to the technical field of material surface preparation, and in particular relates to a large-pore spacing anodic aluminum oxide film based on a parabolic equation boosting pressure and a preparation method and application thereof. Background technique [0002] With the rapid development of industry and technology in recent years, the demand for functional materials in various industries has greatly increased. In particular, nanomaterials play a decisive role in the fields of micro sensors, energy storage, environmental protection and energy saving, and biomedicine. Porous anodic aluminum oxide film has a highly ordered hexagonal nanopore structure with periodic arrangement, and has the characteristics of high temperature resistance and good insulation. It is often used as an ideal nano-template material and is widely used to prepare large-area highly effective Ordered quasi-zero-dimensional nano-array materials (such as nano-dots...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/10C25D11/16C25D11/24C25F3/20C23F1/36
Inventor 陈安伏邢清松
Owner GUANGDONG UNIV OF TECH
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