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Surface treatment method for improving biological activity of medical degradable zinc alloy

A technology of biological activity and treatment method is applied in the treatment field of improving the biological activity of zinc alloy surface, which can solve problems such as poor biological activity of zinc alloy, and achieve the effects of simple and convenient overall operation, increased biological activity and simple method.

Inactive Publication Date: 2020-07-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a treatment method for improving the biological activity of the surface of medical degradable zinc alloys, so as to solve the problem of poor biological activity of zinc alloys as medical degradable biomaterials

Method used

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  • Surface treatment method for improving biological activity of medical degradable zinc alloy
  • Surface treatment method for improving biological activity of medical degradable zinc alloy
  • Surface treatment method for improving biological activity of medical degradable zinc alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0054] 1. Polish the surface of the pure zinc sample with SiC sandpaper (the roughness of the sandpaper is 80#, 200#, 400#, 600#, 800#, 1000#) until it is smooth without scratches, and then use deionized water and anhydrous Ultrasonic cleaning with ethanol and drying for later use.

[0055] 2. Place the zinc alloy that has undergone surface pretreatment in a mixed polishing solution with a volume ratio of sulfuric acid: hydrogen peroxide: water = 3:70:292. The whole device is placed in a water bath at 30°C. After 15 minutes of treatment, take it out Sample, clean the surface of the sample with deionized water, and dry it for later use.

[0056] 3. Put the sample after step 2 into a 5% hydrogen peroxide solution, place it in a 50°C water bath, and after 60 minutes of treatment, wash the surface of the sample with deionized water and dry it; then place it in a 1mol / L of sodium hydroxide solution, placed in a 50°C water bath, after 90 minutes of treatment, the surface of the sa...

Embodiment 2

[0062] 1. Polish the surface of the pure zinc sample with SiC sandpaper (the roughness of the sandpaper is 80#, 200#, 400#, 600#, 800#, 1000#), and then use deionized water and absolute ethanol to clean it ultrasonically , blow dry and set aside.

[0063] 2. Place the zinc alloy that has undergone surface pretreatment in a mixed polishing solution with a volume ratio of sulfuric acid: hydrogen peroxide: water = 3:70:292. The whole device is placed in a water bath at 30°C. After 15 minutes of treatment, take it out Sample, clean the surface of the sample with deionized water, and dry it for later use.

[0064] 3. Put the sample after step 2 into a 5% hydrogen peroxide solution, place it in a 30°C water bath, and after 30 minutes of treatment, wash the surface of the sample with deionized water and dry it; then place it in a 1mol / L of sodium hydroxide solution, placed in a 30°C water bath, after 30 minutes of treatment, the surface of the sample was cleaned with deionized wate...

Embodiment 3

[0070] 1. Polish the surface of the pure zinc sample with SiC sandpaper (the roughness of the sandpaper is 80#, 200#, 400#, 600#, 800#, 1000#), and then use deionized water and absolute ethanol to clean it ultrasonically , blow dry and set aside.

[0071] 2. Place the zinc alloy that has undergone surface pretreatment in a mixed polishing solution with a volume ratio of sulfuric acid: hydrogen peroxide: water = 3:70:292. The whole device is placed in a water bath at 30°C. After 15 minutes of treatment, take it out Sample, clean the surface of the sample with deionized water, and dry it for later use.

[0072] 3. Put the sample after step 2 into a 5% hydrogen peroxide solution, place it in a water bath at 80°C, and after 90 minutes of treatment, wash the surface of the sample with deionized water and dry it; then place it in a 1mol / L of sodium hydroxide solution, placed in a water bath at 60°C, and after 120 minutes of treatment, the surface of the sample was cleaned with dei...

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Abstract

The invention provides a surface treatment method for improving biological activity of medical degradable zinc alloy. The surface treatment method comprises the following steps of surface pretreatment, chemical polishing and compound activating treatment, after treatment, the biological activity of the zinc alloy can be remarkably improved, which mainly reflects that the surface hydrophily of thematerial is remarkably improved, and the surface can be subjected to uniform compact Ca-P layer biogenic deposit. Pure zinc which is not subjected to any treatment is put in simulated body fluid (SBF), and the surface of the pure zinc is hard to be subjected to Ca-P layer deposit; and the electric current density of zinc alloy subjected to treatment is reduced, and the coating impedance module value is decreased. The surface treatment effect is remarkable, the method is simple, operability is high, the equipment requirement is not high, the cost is low, and the method is suitable for mass production.

Description

technical field [0001] The technical problem to be solved by the present invention is to provide a technical field of surface modification of medical zinc alloys, in particular to a treatment method for improving the biological activity of zinc alloy surfaces. Background technique [0002] As a new type of medical degradable material, zinc and zinc alloy have good biocompatibility and biodegradability. The bone tissue implant device material will gradually degrade with time during the service in the human body, and The degradation products are non-toxic and harmless to the human body, and zinc and zinc alloys have good density and elastic modulus, which are similar to human bone tissue, so there will be no stress shielding effect. Importantly, the standard electrode potential of zinc is -0.763v, which is greater than -2.363v of magnesium and less than -0.440v of iron, so zinc alloys have a more moderate degradation rate and better degradation than iron-based alloys and magne...

Claims

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Application Information

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IPC IPC(8): C23F3/06C23C22/60C23C26/00A61L27/04A61L27/32A61L27/58
CPCA61L27/047A61L27/32A61L27/58A61L2400/18A61L2420/02A61L2430/02C23C22/60C23C26/00C23F3/06
Inventor 储成林王婷张昕白晶薛烽
Owner SOUTHEAST UNIV
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