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Method of preparing hydroxyl apatite bioceramic film by plasma micro-arc oxidization method

A bioceramic membrane, hydroxyapatite technology, applied in coatings, surface reaction electrolytic coatings, electrolytic coatings, etc., can solve the problems of phase structure change, low bonding strength between surface coating and substrate, and achieve uniform distribution, The effect of tight bonding, compositional and structural stability

Inactive Publication Date: 2007-10-17
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bonding strength between the surface coating and the substrate prepared by sol-gel and electrodeposition technology is low, and the subsequent high heat treatment of the sol-gel method changes the phase structure of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: prepare 0.06mol / L sodium dihydrogen phosphate (NaH 2 PO 4 .2H 2 O) solution, then add 0.13mol / L calcium acetate ((CH 3 COO) 2 Ca.H 2 O), fully stirred, and prepared as an electrolyte. Pure titanium is used as the anode of micro-arc oxidation, and the stainless steel electrolytic cell is used as the cathode. The pure titanium sheet is first polished with #200, #400, #600, #800, #1000 sandpaper, rinsed with deionized water and placed in the electrolyte, using a pulse power supply with a current density of 10-16A / dm 2 , the duty cycle is 75%, the oxidation time is 10min, the final voltage is 400V, and the HA-containing film layer with a film thickness of 10-15μm can be formed. Cooling water is passed into the oxidation process for cooling, and the temperature is kept below 50°C.

Embodiment 2

[0014] Embodiment 2: prepare the NaH of 0.12mol / L with deionized water 2 PO 4 .2H 2 O solution, then add 0.26mol / L (CH 3 COO) 2 Ca.H 2 O, fully stirred, prepared as electrolyte. Pure titanium is used as the anode of micro-arc oxidation, and the stainless steel electrolytic cell is used as the cathode. The pure titanium sheet is first polished with #200, #400, #600, #800, #1000 sandpaper, rinsed with deionized water and placed in the electrolyte, using a pulse power supply with a current density of 10-16A / dm 2 , the duty ratio is 50%, the oxidation time is 10min, the final voltage is 400V, and the HA-containing film layer with a film thickness of 10-15μm can be formed. Cooling water is passed into the oxidation process for cooling, and the temperature is kept below 50°C.

Embodiment 3

[0015] Embodiment 3: prepare the NaH of 0.18mol / L with deionized water 2 PO 4 .2H 2 O solution, then add 0.39mol / L (CH 3 COO) 2 Ca.H 2 O, fully stirred, prepared as electrolyte. Pure titanium is used as the anode of micro-arc oxidation, and the stainless steel electrolytic cell is used as the cathode. The pure titanium sheet is first polished with #200, #400, #600, #800, #1000 sandpaper, rinsed with deionized water and placed in the electrolyte, using a pulse power supply with a current density of 10-16A / dm 2 , the duty ratio is 25%, the oxidation time is 10min, the final voltage is 400V, and the HA-containing film layer with a film thickness of 10-15μm can be formed. Cooling water is passed into the oxidation process for cooling, and the temperature is kept below 50°C.

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Abstract

The present invention relates to a process for preparing hydroxylapatite bio-ceramic membranes at titanium or titanium alloy surfaces by utilizing differential arc oxidation process. Firstly, preparing electrolytic solution A by using calcium ion salts and phosphate radical ion-containing salts, or preparing electrolytic solution B by adding metal silver ions to the electrolytic solution A; or preparing electrolytic solution C by adding metal silicon ions to the electrolytic solution A; and then, selecting titanium or titanium alloy as anodes and putting them respectively into the electrolytic solution A, B and C, selecting the non-corrodible steel container for containing the electrolytic solutions as cathodes, controlling conditions such as impulse electrical source positive phase voltage, frequency for differential arc oxidation of titanium or titanium alloy, then hydroxylapatite bio-ceramic membrane layers possessing different performances are prepared. Said titanium based bio-ceramic compound material prepared according to said process possesses not only intensity and toughness of metals but also biological activity of hydroxylapatites, and is capable of being applied in the fields such as jackstraw chirurgery implantation body and tooth planting body.

Description

Technical field: [0001] The invention relates to a technology for modifying the metal surface, that is, a method for directly preparing a hydroxyapatite bioceramic film on the surface of titanium or titanium alloy by using a micro-arc oxidation method. The titanium-based bioceramic composite material prepared by the method can be applied to the fields of femur in orthopedic surgery, hip joint implants, dental implants in oral restoration, and the like. Background technique: [0002] Titanium or titanium alloy is a commonly used medical biomaterial. It has good biocompatibility, high strength and toughness, but it lacks biological activity. After implanted into the human body, it cannot be well combined with human bone, and it is easy to cause the implant to loosen. fall off. Hydroxyapatite (Hydroxyapatite, HA) is the main mineral component of bone, has good biocompatibility and bioactivity, is safe and non-toxic after implantation into the human body, and can induce bone gr...

Claims

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Application Information

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IPC IPC(8): C25D11/00C25D11/26
Inventor 石玉龙闫凤英谢广文倪嘉桦
Owner QINGDAO UNIV OF SCI & TECH
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