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Surface modification method of medical magnesium alloy

A surface modification and magnesium alloy technology, which is applied in the field of surface modification of medical magnesium alloys, can solve the problems of easy falling off, small binding force, and high degradation rate of magnesium alloys, and achieve increased surface roughness and good biocompatibility properties, improving binding strength and biocompatibility

Inactive Publication Date: 2015-10-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the bonding force between the magnesium alloy substrate and the coating is small, it is easy to fall off, and the degradation rate is too large in the later stage of magnesium alloy implantation, and to provide a surface modification method for medical magnesium alloys

Method used

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  • Surface modification method of medical magnesium alloy
  • Surface modification method of medical magnesium alloy

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specific Embodiment approach 1

[0017] Embodiment 1: The surface modification method of the medical magnesium alloy of the present embodiment is realized according to the following steps:

[0018] 1. Use metallographic sandpaper to polish the medical magnesium alloy material, then place it in absolute ethanol for ultrasonic cleaning at room temperature for 4-6 minutes, then use deionized water for ultrasonic cleaning at room temperature for 5-8 minutes, take it out and air dry it naturally to obtain The cleaned medical magnesium alloy material;

[0019] 2. Put the cleaned medical magnesium alloy material obtained in step 1 into the vacuum chamber of the high-current pulsed electron beam device, pass argon into the vacuum chamber after evacuation, open the electron gun, and control the acceleration voltage of the electron gun to be 10~20kV, The pulse width is 2-5 μs, the irradiation interval time is 10-15 s, and the irradiation times are 5-15 times to obtain a medical magnesium alloy material with a remelting...

specific Embodiment approach 2

[0022] Specific embodiment 2: The difference between this embodiment and the specific embodiment 1 is that in step 1, 320#, 600# and 1200# metallographic sandpapers are sequentially used to polish the medical magnesium alloy material. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that step 2 is evacuated to 1×10 -3 ~5×10 -3 After Pa, argon gas was introduced into the vacuum chamber, and the air pressure was maintained at 0.04-0.06Pa. Other steps and parameters are the same as in the first or second embodiment.

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Abstract

The invention relates to the technical field of biological materials, in particular to a surface modification method of medical magnesium alloy. The surface modification method of the medical magnesium alloy aims at resolving the problems that the bonding force between a magnesium alloy base body and a coating is small, the magnesium alloy base body is prone to falling off, and the decomposition speed is too high in the later implantation period of the magnesium alloy. The surface modification method includes the steps that firstly, medical magnesium alloy materials are ground through abrasive paper, cleaned and then aired; secondly, cleaned medical magnesium alloy materials are put into a high-current pulse electron beam device to be radiated; thirdly, calcium and phosphorus electrolyte is prepared, and a hydroxyapatite coating is prepared on the surface of the medical magnesium alloy materials in a pulse electrodeposition mode. The surface modification method of the medical magnesium alloy improves the biological activity of the surface of the magnesium alloy, improves the corrosion resistance in the later implantation period of the magnesium alloy, obviously improves the bonding force between the hydroxyapatite and the base body, and overcomes the problems that the service life of a medical magnesium alloy implant is short, and the hydroxyapatite coating is prone to falling off.

Description

technical field [0001] The invention relates to the technical field of biological materials, and is particularly suitable for the field of surface modification of biological medical materials, in particular to a surface modification method of medical magnesium alloys. Background technique [0002] Among all the metal biomaterials for medical bone implantation, magnesium alloys have high specific strength and specific stiffness, and their density is close to that of human bone, and the elastic modulus and yield strength are not much different from those of human bone, so it can effectively alleviate the stress shielding effect. . Due to the above advantages, magnesium alloys have received extensive attention as potential ideal biotransplant materials. [0003] However, in the complex human physiological environment, magnesium alloys are prone to corrosion, especially in body fluids containing chloride ions, the material corrosion is more serious. Excessive degradation rate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/12C25D5/18C25D5/42
Inventor 徐芳君张忠忠贾甜甜邓坤坤聂凯波
Owner TAIYUAN UNIV OF TECH
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