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A kind of preparation method of antibacterial micro-arc oxidation film layer

A technology of micro-arc oxidation and film layer, which is applied in the direction of anodic oxidation, coating, surface reaction electrolytic coating, etc., can solve the problem of insufficient combination of antibacterial coating and micro-arc oxidation film layer, increased process complexity, and poor antibacterial performance Film layer and other problems, to achieve the effect of being suitable for large-scale promotion and application, excellent antibacterial performance, and wide application range

Active Publication Date: 2022-04-08
GUANGDONG MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for imparting antibacterial properties to magnesium alloy micro-arc oxidation coatings mainly include the following two methods: 1) adding compounds with antibacterial properties to the electrolyte, because the uniformity of antibacterial substances distributed inside and outside the film layer is affected by the size and size of the antibacterial substances. The dispersibility of antibacterial substances in the electrolyte has a great influence, the difficulty of actual operation is large, and it is not easy to obtain a film layer with stable antibacterial properties; The combination of the oxide film layer is often not strong enough, and the antibacterial coating is easy to fall off, and this method will increase the complexity of the process, resulting in increased processing costs

Method used

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  • A kind of preparation method of antibacterial micro-arc oxidation film layer
  • A kind of preparation method of antibacterial micro-arc oxidation film layer
  • A kind of preparation method of antibacterial micro-arc oxidation film layer

Examples

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Embodiment 1

[0040] A method for preparing an antibacterial micro-arc oxidation film layer, comprising the following steps:

[0041] 1) Calculate according to the silver content of 6wt%, and weigh the pure magnesium block and metallic silver particles with a purity higher than 99.5wt%, and then polish, pickle and dry the pure magnesium block;

[0042] 2) Put the pure magnesium block treated in step 1) into the smelting furnace, fill it with argon, heat it to 720°C until the pure magnesium block melts, keep it warm for 15 minutes, then raise the temperature to 750°C, add metallic silver particles, and keep it warm for 15 minutes. Lower the temperature to 680°C and let it stand for 15 minutes to remove impurities on the surface of the molten material;

[0043] 3) Inject the molten material in step 2) into a steel mold coated with a mold release agent and preheated to 280°C, and slowly immerse the steel mold in flowing water at 20°C to rapidly solidify the molten material in the mold, Demoul...

Embodiment 2

[0052]A method for preparing an antibacterial micro-arc oxidation film layer, comprising the following steps:

[0053] 1) Calculate according to the silver content of 6wt%, and weigh the pure magnesium block and metallic silver particles with a purity higher than 99.5wt%, and then polish, pickle and dry the pure magnesium block;

[0054] 2) Put the pure magnesium block treated in step 1) into the smelting furnace, fill it with argon, heat it to 720°C until the pure magnesium block melts, keep it warm for 15 minutes, then raise the temperature to 750°C, add metallic silver particles, and keep it warm for 15 minutes. Lower the temperature to 680°C and let it stand for 15 minutes to remove impurities on the surface of the molten material;

[0055] 3) Inject the molten material in step 2) into a steel mold coated with a release agent and preheated to 300°C, and slowly immerse the steel mold in flowing water at 20°C to rapidly solidify the molten material in the mold, Demoulding t...

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Abstract

The invention discloses a method for preparing an antibacterial micro-arc oxidation film layer, which comprises the following steps: first melting and preparing a silver-containing magnesium alloy, and then performing micro-arc oxidation to form an antibacterial micro-arc oxidation film layer on the surface of the silver-containing magnesium alloy. The method of the invention can endow the micro-arc oxidation film layer with excellent antibacterial properties, and is simple to operate, safe and reliable, and has broad application prospects in the field of orthopedic implants.

Description

technical field [0001] The invention relates to a method for preparing an antibacterial micro-arc oxidation film layer, which belongs to the technical field of surface engineering. Background technique [0002] Bio-magnesium alloys have many advantages as bone implant materials, such as biodegradability, good biocompatibility, high specific strength and specific stiffness, etc., and magnesium is a constant element in the human body and an important part of human bones , plays an important role in bone metabolism. Compared with other metal materials, the Young's modulus of magnesium alloy is closer to that of human cortical bone, and its degradability greatly reduces the potential stress shielding effect on bone tissue after implantation, which is beneficial to the healing of bone tissue. Therefore, magnesium alloys have attracted more and more attention in hard tissue implantation, and have also been a research hotspot for a long time. However, the degradation rate of magn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30C22C1/03C22C23/00C22F1/06A61L27/04A61L27/30A61L27/54
CPCC25D11/026C25D11/30C22C1/03C22C23/00C22F1/06A61L27/047A61L27/306A61L27/54A61L2300/102A61L2300/404A61L2430/02A61L2420/02
Inventor 刘志聃黎花单志胡晓岳戴护民
Owner GUANGDONG MECHANICAL & ELECTRICAL COLLEGE
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