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Preparation method and application of magnesium-doped porous nano titanium oxide coating

A nano-titanium oxide, coating technology, applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., to achieve the effect of fast proliferation rate, good biocompatibility, and easy operation

Inactive Publication Date: 2010-12-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

However, how to make a magnesium-doped porous nano-titanium oxide coating with good biological activity on the surface of titanium and its alloys by using an electrolyte with a suitable concentration and suitable micro-arc oxidation technical parameters is currently unknown in the field. The problem that needs to be solved, there are few relevant reports on this part of the prior art

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  • Preparation method and application of magnesium-doped porous nano titanium oxide coating
  • Preparation method and application of magnesium-doped porous nano titanium oxide coating
  • Preparation method and application of magnesium-doped porous nano titanium oxide coating

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Embodiment 1

[0028] (a) Using deionized water, mix 0.04 mol / L magnesium acetate, 0.1 mol / L calcium acetate and 0.05 mol / L sodium glycerophosphate to prepare an electrolyte solution. (b) With titanium as the anode and stainless steel as the cathode, a DC pulse power supply is used at a constant current density of 0.5A / cm 2 , under the conditions of voltage 390-460V, frequency 800Hz, and duty ratio 10% for 4 minutes, and keep the electrolyte temperature below 60°C (50°C). (c) After the sample was taken out, it was rinsed in deionized water and dried naturally. After testing, the thickness of the coating is about 8-15 μm, and the element composition is mainly Ti, O, Mg, Ca and P. X-ray diffraction analysis shows that the coating phase composition is mainly pure anatase TiO 2 and rutile TiO 2 , EDS results show that the content of magnesium in the coating is about 1.3wt%, and SEM analysis shows that the pore size of the coating is less than 10 μm, and the grain size is 10-80nm.

[0029] fi...

Embodiment 2

[0031] (a) Using deionized water, mix 0.08 mol / L magnesium acetate, 0.1 mol / L sodium hydroxide, 0.1 mol / L calcium acetate and 0.05 mol / L sodium glycerophosphate to prepare an electrolyte. (b) With titanium as the anode and stainless steel as the cathode, a DC pulse power supply is used at a constant current density of 1A / cm 2 , under the conditions of voltage 400-480V, frequency 800Hz, and duty cycle 10% for 3 minutes, and keep the electrolyte temperature below 60°C (50°C). (c) After the sample was taken out, it was rinsed in deionized water and dried naturally. After testing, the thickness of the coating is about 15-25 μm, and the element composition is mainly Ti, O, Mg, Ca and P. X-ray diffraction analysis shows that the coating phase composition is mainly anatase TiO 2 and rutile TiO 2 , EDS results show that the content of zinc in the coating is about 3.2wt%, and SEM analysis shows that the pore size of the coating is less than 15 μm, and the grain size is 20-100nm.

Embodiment 3

[0033] (a) Use deionized water to mix 0.02mol / L magnesium nitrate and 0.1mol / L calcium acetate to prepare electrolyte. (b) With titanium as the anode and stainless steel as the cathode, a DC pulse power supply is used at a constant current density of 0.9A / cm 2 1. Treat for 5 minutes under the conditions of voltage 300-350V, frequency 1000Hz, and duty cycle 30%, and keep the electrolyte temperature below 60°C (40°C). (c) After the sample was taken out, it was rinsed in deionized water and dried naturally. After testing, the thickness of the coating is about 3-8 μm, and the element composition is mainly Ti, O, Mg and Ca. X-ray diffraction analysis shows that the coating phase composition is pure anatase TiO 2 , EDS results show that the magnesium content in the coating is about 0.7wt%, and SEM analysis shows that the pore size of the coating is less than 1 μm, and the grain size is 10-80nm.

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Abstract

The invention belongs to the technical field of biological ceramics, and in particular relates to a preparation method and application of a magnesium-doped porous nano titanium oxide coating. In the method, in magnesium ion-containing electrolyte, the magnesium-doped porous nano titanium oxide coating is directly generated on the surface of titanium or titanium alloy by one step by microarc oxidation technology, wherein based on the volume of the electrolyte, the magnesium ion concentration range is 0.01-0.5mol / L. The magnesium-doped porous nano titanium oxide coating prepared by the method mainly comprises anatase titanium oxide and rutile titanium oxide or pure anatase; and when the coating is soaked in buffer solution, magnesium ions can be released from the coating in a long time. Osteoblasts can quickly attach to and propagate on the surface of the coating, and have good biocompatibility without cytotoxicity. Compared with undoped titanium oxide coating, the magnesium-doped porous nano titanium oxide coating can obviously improve the propagation rate and activity of the osteoblasts on the surface of the coating.

Description

technical field [0001] The invention belongs to the technical field of bioceramics, and in particular relates to a preparation method and application of a magnesium-doped porous nano-titanium oxide coating. Background technique [0002] Titanium and its alloys are widely used as bone tissue repair and replacement materials due to their low elastic modulus, excellent biocompatibility, corrosion resistance and mechanical properties. According to reports, the excellent biocompatibility and corrosion resistance of titanium and its alloys are mainly attributed to a layer of titanium oxide film naturally existing on its surface. Therefore, titanium oxide ceramics and coating materials have become a research hotspot in the field of biomaterials. Especially in recent years, nano-titanium oxide is inducing the formation of bone-like apatite (see Chinese patent ZL 200510029743.2, ZL 200510023170.2, Uchida M, Kim HM, Kokubo T, Fujibayashi S, Nakamura T.Structural dependence of apatite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26A61L27/30
Inventor 胡红杰刘宣勇丁传贤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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