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Zinc-doped porous nano-titanium oxide coating and its preparation method

A nano-titanium oxide, zinc-doped technology, applied in coatings, surface reaction electrolytic coatings, electrolytic coatings, etc., can solve problems such as unreported, and achieve the effects of easy popularization and application, strong vitality and high bonding strength

Active Publication Date: 2012-03-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There have been many studies on the doping of zinc in calcium phosphate and hydroxyapatite ceramics, but the research on improving the biological properties of zinc doped titanium oxide has not been reported.

Method used

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  • Zinc-doped porous nano-titanium oxide coating and its preparation method
  • Zinc-doped porous nano-titanium oxide coating and its preparation method
  • Zinc-doped porous nano-titanium oxide coating and its preparation method

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Embodiment 1

[0029] (a) Using deionized water, mix 0.02 mol / L zinc 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 , Voltage 400-460V, frequency 800Hz, duty cycle 10% under the conditions of treatment for 4min, keep the electrolyte temperature below 60 ℃. (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 5-10 μm, and the element composition is mainly Ti, O, Zn, Ca and P. X-ray diffraction analysis shows that the coating phase composition is mainly pure anatase TiO 2 , EDS results show that the zinc content in the coating is about 3.4wt%, and SEM analysis shows that the pore size of the coating is less than 10 μm, and the grain size is 10-100nm.

Embodiment 2

[0031] (a) Using deionized water, mix 0.04 mol / L zinc 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 , Voltage 400-480V, frequency 800Hz, duty cycle 10% under the conditions of treatment for 4min, keep the electrolyte temperature below 60 ℃. (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 6-12 μm, and the element composition is mainly Ti, O, Zn, 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 7.3wt%, and SEM analysis shows that the pore size of the coating is less than 10 μm, and the grain size is 20-100nm.

Embodiment 3

[0033] (a) Using deionized water, mix 0.08 mol / L zinc nitrate, 0.2 mol / L calcium acetate, 0.02 mol / L sodium glycerophosphate and 0.1 mol / L sodium hydroxide 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 1A / cm 2 , The voltage is 500-600V, the frequency is 1000Hz, and the duty cycle is 30% for 3 minutes, and the temperature of the electrolyte is kept below 60°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 25-35 μm, and the element composition is mainly Ti, O, Zn, 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 zinc content in the coating is about 15.7wt%, and SEM analysis shows that the pore size of the coating is less than 20 μm, and the grain size is 40-100nm. ...

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Abstract

Belonging to the technical field of biomedical ceramic coatings and nano-materials, the invention relates to a zinc-doped porous nano-titanium oxide coating and its preparation method. The preparation method consists of the steps of: providing a zinc-containing electrolytic solution, and supplementing at least one electrolyte for assisting arc striking, and in the electrolytic solution, taking titanium or titanium alloy as the positive electrode and stainless steel as the negative electrode, conducting microarc oxidation treatment to the titanium or titanium alloy with a direct current pulse power supply, thus obtaining a coating with a porous nano-crystal structure, a pore size of less than 20micrometers and a surface crystal grain scale of less than 100nm. Specifically, the coating phase is anatase titanium oxide or a composite of anatase titanium oxide and rutile titanium oxide, and has zinc content of 0.01-50 wt%. The nano-titanium oxide coating of the invention has better biocompatibility than existing titanium oxide coatings. And osteoblasts on the surface of the coating have faster propagation rate and stronger vigor. Thus, the zinc-doped porous nano-titanium oxide coating in the invention can be used as a replacing material for positions such as thighbones, hip joints, dental implants and others that bear heavy loads.

Description

technical field [0001] The invention relates to a zinc-doped porous nano-titanium oxide coating and a preparation method thereof, more specifically to a titanium-based zinc-doped porous nano-titanium oxide coating used for artificial bones, hip joints or dental implants A layer and a preparation method thereof belong to the technical field of medical bioceramic coating and nanomaterials. 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 has be...

Claims

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Application Information

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IPC IPC(8): A61L27/30C25D11/26
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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