Hydrophobic composite biological activity coating on surface of pure-magnesium or magnesium alloy and preparation method of hydrophobic composite biological activity coating

A bioactive, magnesium alloy technology, applied in the field of pure magnesium or magnesium alloy surface hydrophobic composite bioactive coating and its preparation, can solve the problems of unfavorable protection, micro-arc oxidation coating cracks, poor induction ability of calcium and phosphorus salts, etc. Achieve high density, improve corrosion resistance, and improve osteoinductive ability

Inactive Publication Date: 2016-03-23
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, the porous morphology of the micro-arc oxidation coating cannot be changed, and some micropores even directly lead to the magnesium alloy substrate, which is not conducive to the protection of the magnesium alloy substrate by the micro-arc oxidation coating.
At the same time, the in vitro simulated body immersion experiment shows that the immersion process in simulated body fluid will lead to cracks in the micro-arc oxidation coating, and the induction ability to calcium and phosphorus salts is poor.

Method used

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  • Hydrophobic composite biological activity coating on surface of pure-magnesium or magnesium alloy and preparation method of hydrophobic composite biological activity coating
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  • Hydrophobic composite biological activity coating on surface of pure-magnesium or magnesium alloy and preparation method of hydrophobic composite biological activity coating

Examples

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Embodiment 1

[0031] A method for preparing a hydrophobic composite bioactive coating on the surface of pure magnesium or magnesium alloy, the specific steps are:

[0032] 1) Preparation of micro-arc oxidation coating on the surface of magnesium alloy:

[0033] Taking the treated magnesium alloy as the anode and the stainless steel plate as the cathode; placing the anode and the cathode in the electrolyte, and performing micro-arc oxidation for 10 minutes; wherein the electrolyte is sodium phosphate with a concentration of 50g / L and 5g / L Aqueous solution of L sodium hydroxide;

[0034] 2) Preparation of hydroxyapatite coating:

[0035] Prepare the electrolytic solution for electrodepositing hydroxyapatite, the composition of each solute is: ammonium dihydrogen phosphate of 0.042mol / L, calcium nitrate of 0.025mol / L and hydrogen peroxide of 10ml / L; The arc oxidation coating is used as the cathode, and the graphite rod is used as the anode, which is inserted into the electrolyte for electrod...

Embodiment 2

[0039] A method for preparing a hydrophobic composite bioactive coating on the surface of pure magnesium or magnesium alloy, the specific steps are:

[0040] 1) Preparation of micro-arc oxidation coating on the surface of magnesium alloy:

[0041] Taking the treated magnesium alloy as the anode and the stainless steel plate as the cathode; placing the anode and the cathode in the electrolyte, and performing micro-arc oxidation for 10 minutes; wherein the electrolyte is sodium phosphate with a concentration of 50g / L and 5g / L Aqueous solution of L sodium hydroxide;

[0042] 2) Preparation of hydroxyapatite coating:

[0043]Prepare the electrolytic solution for electrodepositing hydroxyapatite, the composition of each solute is: ammonium dihydrogen phosphate of 0.042mol / L, calcium nitrate of 0.025mol / L and hydrogen peroxide of 10ml / L; The arc oxidation coating is used as the cathode, and the graphite rod is used as the anode, which is inserted into the electrolyte for electrode...

Embodiment 3

[0047] A method for preparing a hydrophobic composite bioactive coating on the surface of pure magnesium or magnesium alloy, the specific steps are:

[0048] 1) Preparation of micro-arc oxidation coating on the surface of magnesium alloy:

[0049] Taking the treated magnesium alloy as the anode and the stainless steel plate as the cathode; placing the anode and the cathode in the electrolyte, and performing micro-arc oxidation for 10 minutes; wherein the electrolyte is sodium phosphate with a concentration of 50g / L and 5g / L Aqueous solution of L sodium hydroxide;

[0050] 2) Preparation of hydroxyapatite coating:

[0051] Prepare the electrolytic solution for electrodepositing hydroxyapatite, the composition of each solute is: ammonium dihydrogen phosphate of 0.042mol / L, calcium nitrate of 0.025mol / L, hydrogen peroxide of 10ml / L; The arc oxidation coating is used as the cathode, and the graphite rod is used as the anode, which is inserted into the electrolyte for electrodepo...

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Abstract

The invention relates to the technical field of surface treatment of bio-medical metal materials, in particular to a hydrophobic composite biological activity coating on the surface of pure-magnesium or magnesium alloy and a preparation method of the hydrophobic composite biological activity coating. The method includes the technical processes of preparing a micro-arc oxidation coating on the surface of a magnesium matrix material firstly, preparing a hydroxyapatite coating on the basis of the micro-arc oxidation coating to form a composite active coating, and carrying out hydrophobic treatment on the composite active coating finally to form the hydrophobic composite biological activity coating. The hydrophobic composite biological activity coating on the surface of the magnesium alloy is composed of magnesium oxide, magnesium phosphate and hydroxyapatite and has a compact layer ranging from 5 micrometers to 10 micrometers and a band-shaped hydroxyapatite array, the contact angle of the coating and simulated body fluid is larger than 90 degrees, and the coating shows hydrophobicity. The hydrophobic composite biological activity coating has the beneficial effects of high corrosion resistance, good biocompatibility, good bone induction capacity and the like, and has the wide application prospect.

Description

technical field [0001] The invention relates to the technical field of surface treatment of biomedical metal materials, in particular to a hydrophobic composite bioactive coating on the surface of pure magnesium or a magnesium alloy and a preparation method thereof. technical background [0002] China has a huge population base and an increasingly serious population aging problem. Traffic accidents and sports trauma accidents occur frequently, resulting in frequent bone injuries. Bone implant materials are often used in the bone repair process, and the most ideal bone implant material is degradable bone implant material, which is safe, non-toxic and degradable in the human body, and is more efficient than traditional bone implant materials. Advantage. Degradable metal medical biomaterials not only have high technological content and economic value, but also are closely related to the life and health of patients, and have very high social value. [0003] Magnesium and magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30C25D9/12A61L27/04A61L27/30A61L27/32A61L27/54
CPCA61L27/047A61L27/306A61L27/32A61L27/54C25D9/12C25D11/30
Inventor 温翠莲夏承森詹晓章黄小桂熊锐洪云林逵
Owner FUZHOU UNIV
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