Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface

A technology of biological activity and surface treatment, applied in surface reaction electrolytic coating, medical science, electrolytic coating, etc., can solve problems such as no systematic research, achieve the effect of simple method, improve biological activity, and improve anti-wear ability

Inactive Publication Date: 2012-09-26
WEIGAO HLDG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most researches are dedicated to the preparation of nanotubes on the surface of pure titanium and titanium alloys containing a small amount of other elements such as Al and V. For β

Method used

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  • Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface
  • Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface
  • Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1

[0044] The Ti-24Nb-4Zr-8Sn sample with a diameter of 10mm and a thickness of 1mm is polished step by step with 800#, 1200#SiC sandpaper on a pre-mill, and then ultrasonically cleaned with acetone, absolute ethanol and deionized water for ten minutes each , Blow dry in the air.

[0045] The process of the oxidation treatment method is as follows: the anodic oxidation method, the electrolyte aqueous solution is 1 mole / liter NH 4 NO 3 , 0.15 mol / L NH 4 HF 2 , The pH of the solution is about 6-7.

[0046] At room temperature, the titanium-niobium-zirconium-tin alloy (Ti-24Nb-4Zr-8Sn) is used as the anode, and the stainless steel container is used as the cathode. The step-up method is adopted. The pressure rise rate under different test parameters is 0.5V / s, and the oxidation time is from Start timing after boosting to the set voltage. After oxidation, clean with deionized water.

[0047] Set the same oxidation time (1.5h), after different oxidation voltages (10-80V), ...

Example Embodiment

[0053] Example 2

[0054] The difference from Example 1 is:

[0055] After the Ti-25Nb sample with a diameter of 10mm and a thickness of 1mm is polished step by step with 800#, 1200#SiC sandpaper on a pre-mill, it is ultrasonically cleaned with acetone, absolute ethanol and deionized water for ten minutes each, and blown in air dry.

[0056] The process of the oxidation treatment method is as follows: the anodic oxidation method, the electrolyte aqueous solution is 1.5 mol / liter NH 4 NO 3 , 0.15 mol / L NH 4 HF 2 , The pH of the solution is about 6-7.

[0057] At room temperature, titanium-niobium alloy (Ti-25Nb) is used as anode, stainless steel container is used as cathode, and the step-up method is adopted. The step-up speed under different test parameters is 0.5V / s, and the oxidation time is from the step-up to the set voltage Then start timing. Clean with deionized water after oxidation. Set the same oxidation time (1.5h), the nanotube oxide film formed after different oxidation...

Example Embodiment

[0058] Example 3

[0059] The difference from Example 1 is:

[0060] After the Ti-25Zr sample with a diameter of 10mm and a thickness of 1mm is polished step by step with 800#, 1200#SiC sandpaper on a pre-mill, it is ultrasonically cleaned with acetone, absolute ethanol and deionized water for ten minutes, and blown in the air. dry.

[0061] The process of the oxidation treatment method is as follows: the anodic oxidation method, the electrolyte aqueous solution is 1.5 mol / liter NH 4 NO 3 , 0.15 mol / L NH 4 HF 2 , The pH of the solution is about 6-7.

[0062] At room temperature, titanium-zirconium alloy (Ti-25Zr) is used as anode, stainless steel container is used as cathode, and the step-up method is adopted. The step-up rate is 0.5V / s under different test parameters, and the oxidation time is from the step-up to the set voltage. Then start timing. Clean with deionized water after oxidation. Set the oxidation time (1.5h), the surface and cross-section of the nanotube oxide film ge...

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Abstract

The invention relates to the technical field of surface treatment and especially relates to a surface treatment method for improving bioactivity of a medical beta-type titanium alloy surface. The surface treatment method is characterized in that through anodic oxidation, hydro-thermal treatment and heating treatment on a titanium alloy, a composite oxide coating is formed on the surface of the titanium alloy; an inner layer is an oxide nanotube layer; the contents and element valences of Ti, Nb and Zr oxides of the inner layer change gradually; the diameter of the inner layer is in a range of 30 to 310nm; the thickness of the inner layer is in a range of 0 to 20 microns; and an outer layer is a calcium titanate layer having the thickness of 0 to 1 microns. The surface treatment method is suitable for a beta-type medical titanium alloy rich in Nb, Zr and the like. A gradient coating prepared by the surface treatment method has an integrated crystal form, has a high bone hydroxyapatite layer formation induction capacity and a high cell absorption and proliferation capacity of the surface, and has good biocompatibility. The surface treatment method can prevent the phase change and the brittle rupture caused by high temperature spaying. An oxide layer membrane is directly formed on a matrix by chemical and electrochemical principles so that the adherence between the matrix and the oxide layer membrane is improved. Through the surface treatment method, a uniform coating layer can be formed on a matrix having a complex shape without the limit of a matrix shape.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a surface treatment method for improving the biological activity of the surface of medical β-type titanium alloy. Background technique [0002] Titanium alloys are widely used in human orthopedic surgery due to their excellent mechanical properties, low elastic modulus, corrosion resistance to body fluids, and good biocompatibility. However, titanium and titanium alloys are still biologically inert materials, and the combination with bone is a mechanical lock, and cannot form a strong chemical bond with human tissue. The biological environment is a very complex physical and chemical environment, including body fluids, organic macromolecules, enzymes, free radicals, cells and other factors in contact with it. After long-term implantation, even metal elements with good compatibility will not A certain level of ionic leaching or abrasive particle aggregation cannot be tol...

Claims

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Application Information

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IPC IPC(8): C25D11/26A61L27/06A61L27/54A61L27/28
Inventor 李述军高山王楠戴美林郝玉琳杨锐
Owner WEIGAO HLDG
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