Antibacterial aluminum and manufacturing method thereof

Abstract

The invention discloses antibacterial aluminum and a manufacturing method thereof. The manufacturing method comprises the following steps: (1) a pretreated aluminum alloy serves as an anode to form two electrodes with a cathode module, and the anodic oxidation is performed in electrolyte to prepare a porous aluminum oxide film on the surface of the aluminum alloy, wherein the hole way unit cell number on the unit area of the porous aluminum oxide film is 70-100*109 / cm2; and the hole way parameters in unit cells are 1-100 microns of the hole depth and 10-50 microns of the aperture; and (2) the aluminum alloy with the porous aluminum oxide film obtained in the step (1) and an electrode module form two electrodes; antibacterial metal is electrolyzed and deposited in hole ways of the porous aluminum oxide film by using deposition liquid; and the particle size of the deposited antibacterial metal is 1-100 nanometers. The manufacturing method of the antibacterial aluminum is simple in process, convenient in operation and low in manufacturing cost; the antibacterial metal is uniformly and stably deposited; the bacterial resisting and killing effect of the aluminum alloy is long in lasting time; and the bacterial resisting and killing rate is high up to reach 99.99%. Dissoluble precipitations cannot be separated out even if long-time use of electrolysis and deposition liquid.

Description

Technical field [0001] The invention belongs to the technical field of aluminum products, and particularly relates to an antibacterial aluminum and a manufacturing method thereof. Background technique [0002] Common antibacterial materials mainly include inorganic antibacterial materials and organic antibacterial materials. Among them, inorganic antibacterial materials mainly include metals such as silver, copper, and zinc. The antibacterial effect of metal ions is in order of strength: silver, mercury, copper, chromium, lead, etc. Among them, mercury, chromium, lead and other materials are toxic to the human body and can cause cancer, so they are rarely used as antibacterial materials. Therefore, silver and copper ion antibacterial agents occupy a dominant position in inorganic antibacterial agents. [0003] At present, the antibacterial effect of some inorganic metal ions depends on photocatalytic reaction. Under the action of light, metal ions can act as a catalytic active cen...

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Problems solved by technology

Practice has shown that although this process is very simple, the process is not easy to control (such as film thickness and coloring consistency, etc.), the coloring effect is not ideal, and the stability of the coloring electrolyte is not enough

[0007] In the existing method of electrolytic coloring and deposition of silver, since no complex compound capable of complexing with silver ions is added to the electrolytic deposition solution, precipitation occurs in the electrolytic deposition solution, and the instability of the electrolytic deposition solution affects the deposition effect.

The combination of antibacterial metal and porous alumina film on the surface of antibacterial aluminum is not firm, the antibacterial effect of antibacterial metal is not good and the antibacterial persistence is poor, and the antibacterial performance is lost after a period of use

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