Micro-arc oxidation preparation method of magnetic TiO2 bioactive coating

A bioactive, micro-arc oxidation technology, applied in coatings, surface reaction electrolytic coatings, electrolytic coatings, etc., can solve problems such as cellular immune rejection, weak binding between particles and substrates, and limitations in the clinical application of magnetic hard tissue materials , to achieve the effect of enhancing osteoinduction and improving biological activity

Active Publication Date: 2017-09-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These hard tissue engineering scaffolds prepared by physical adsorption have weak binding force between the particles and the substrate, which will cause the release of particles in the body after implantation and cause immune rejection of cells, which limits the actual clinical application of magnetic hard tissue materials.

Method used

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  • Micro-arc oxidation preparation method of magnetic TiO2 bioactive coating
  • Micro-arc oxidation preparation method of magnetic TiO2 bioactive coating
  • Micro-arc oxidation preparation method of magnetic TiO2 bioactive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] With deionized water as solvent, calcium acetate, β-glycerophosphate disodium salt and EDTA iron sodium salt as solute electrolyte, the pH of the electrolyte is adjusted to 5.3 by acetic acid solution, and calcium acetate, β-glycerophosphate disodium salt The molar ratio of sodium salt and EDTA iron sodium salt is 10:1:0.625, the concentration of calcium acetate in the electrolyte is 0.2mol / L, and then pure titanium is used as the anode and stainless steel as the cathode, and the pulse power supply is used at a voltage of 550V and a frequency of Under the conditions of 500Hz, 7.5% duty cycle, and 8cm spacing between cathode and anode plates, titanium is subjected to micro-arc oxidation treatment, the treatment time is 8 minutes, and the temperature of the electrolyte is kept at 5-25°C to form porous Ca-containing , P magnetic TiO 2 Bioactive coating, its saturation magnetization can reach 1.101emu / g.

Embodiment 2

[0027] Use deionized water as solvent, calcium chloride, sodium phosphate and ferric chloride as solute in the electrolyte, adjust the pH of the electrolyte to 5 by carbonic acid solution, and the moles of calcium chloride, sodium phosphate and ferric chloride The ratio is 10:1:0.125, the concentration of calcium chloride in the electrolyte is 0.2mol / L, and then the titanium alloy is used as the anode and the stainless steel is used as the cathode. %, under the condition that the distance between the cathode and anode plates is 6cm, micro-arc oxidation treatment is performed on titanium, the treatment time is 3 minutes, and the temperature of the electrolyte is kept at 5-25°C, and porous magnetic TiO containing Ca and P can be formed on the surface of titanium. 2 Bioactive coating, its saturation magnetization can reach 0.2696emu / g.

Embodiment 3

[0029] Taking deionized water as a solvent, taking calcium nitrate, sodium hydrogen phosphate and ferric chloride as the electrolytic solution of solute, adjusting pH by acetic acid solution is 5.2, and the mol ratio of calcium nitrate, sodium hydrogen phosphate and ferric chloride is 10: 1:0.375, the concentration of calcium nitrate in the electrolyte is 0.2mol / L, then pure titanium is used as the anode, stainless steel is used as the cathode, and the pulse power supply is used at a voltage of 400V, a frequency of 100Hz, a duty ratio of 60%, and the distance between the cathode and anode plates Under the condition of 3cm, titanium is subjected to micro-arc oxidation treatment, the treatment time is 1 minute, and the temperature of the electrolyte is kept at 5-25°C, and porous magnetic TiO containing Ca and P can be formed on the surface of titanium. 2 Bioactive coating, its saturation magnetization can reach 0.689emu / g.

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Abstract

The invention discloses a micro-arc oxidation preparation method of a magnetic TiO2 bioactive coating. In an air environment, an electrolytic solution containing calcium salt, phosphor salt and molysite is taken, a pH value of the electrolytic solution is adjusted to be 5.0-5.3, titanium or a titanium alloy is taken as an anode, stainless steel is taken as a cathode, and titanium or the titanium alloy is subjected to micro-arc oxidation treatment for 1-8min by adopting a pulsed power supply, with the temperature of the electrolytic solution being kept at 5-25 DEG C, thus the magnetic TiO2 bioactive coating is generated on a surface layer of titanium or the titanium alloy. The magnetic TiO2 coating having magnetism (Ms being 0.2696-1.101emu/g) and good bioactivity can be prepared with the adoption of the micro-arc oxidation preparation method.

Description

technical field [0001] The invention relates to the field of surface modification of titanium and titanium alloy components, in particular to a magnetic TiO 2 Preparation method of bioactive coating by micro-arc oxidation. Background technique [0002] Due to their excellent mechanical properties, corrosion resistance and biocompatibility, titanium and titanium alloys are currently widely used in hard tissue implant materials. But it is also biologically inert. After implantation, it cannot chemically and biologically combine with the implant tissue, which limits its wider application in biological implants. Bioceramics containing calcium and phosphorus elements have become a potential bioactive material for bone tissue regeneration due to their osteocompatibility, so depositing a layer of bioceramic coatings containing calcium and phosphorus on the surface of titanium and its alloys is a A method for effectively improving the bioactivity of titanium and its alloys. The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26A61L27/32A61L27/06A61L27/54
CPCA61L27/06A61L27/32A61L27/54C25D11/024C25D11/026C25D11/26A61L2400/18A61L2430/02
Inventor 张兰代芳憨勇
Owner XI AN JIAOTONG UNIV
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