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Method for preparing bioactive composite film layer containing hydroxyapatite on titanium metal surface

A technology of hydroxyapatite and composite film, which is applied in the medical field, can solve the problems of low HA content in the film layer, complicated preparation process, and reduced bonding force of the film base, and achieves simple method, simplified process, and good film bonding force Effect

Inactive Publication Date: 2012-07-25
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can be used to prepare a rough surface with a certain biological activity, the preparation process is complicated, the HA content in the film layer is small, and the subsequent process will also cause a decrease in the binding force of the film base.

Method used

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  • Method for preparing bioactive composite film layer containing hydroxyapatite on titanium metal surface
  • Method for preparing bioactive composite film layer containing hydroxyapatite on titanium metal surface
  • Method for preparing bioactive composite film layer containing hydroxyapatite on titanium metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The method for preparing a biologically active composite film layer containing hydroxyapatite on the surface of titanium metal, the specific operations are as follows:

[0036] Step 1, prepare the electrolytic solution in the oxidation tank:

[0037] Mix the calcium glycerophosphate with a concentration of 4g / L and the calcium acetate with a concentration of 25g / L to obtain a mixture A, and the solvent in the mixed solution A is distilled water; then add sodium hydroxide to the mixture A to adjust its pH to 11 , to obtain a mixed solution B; finally add hydroxyapatite to the mixture B in an amount of 12g / L to obtain an electrolyte solution;

[0038] Step 2,

[0039] First surface treatment of pure titanium (purity 99.9%): first polished, then cleaned and degreased;

[0040] Then put the titanium metal sample into the electrolytic solution prepared in step 1, connect the titanium metal sample to the positive pole of the power supply, connect the stainless steel plate t...

Embodiment 2

[0046]The difference from Embodiment 1 is that only the control voltage of the low-voltage deposition stage is different, the voltage is 90V, and the rest are the same as Embodiment 1.

[0047] After testing, HA-TiO 2 The HA content in the composite ceramic layer is 10.3%.

Embodiment 3

[0049] The difference from Embodiment 1 is that only the control voltage of the low-voltage deposition stage is different, the voltage is 60V, and the rest are the same as Embodiment 1.

[0050] After testing, HA-TiO 2 The HA content in the composite ceramic layer was 9.8%.

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Abstract

The invention provides a method for preparing a bioactive composite film layer containing hydroxyapatite on a titanium metal surface. The method comprises the following steps: preparing an electrolytic solution containing hydroxyapatite firstly; then applying voltage to the titanium metal through a power supply for low-voltage deposition and differential arc oxidation treatment, wherein at the low-voltage deposition stage: the voltage is controlled at 30V-120V and the deposition time is 5-20 minutes, and at the differential arc oxidation stage: the voltage is controlled at 450V-600V, the deposition time is 10 minutes and the frequency of the power supply is 200kHz, and the duty ratio is 10%; and growing a layer of HA (hydroxyapatite)-TiO2 composite ceramic layer on the surface of a titanium metal test sample after low-voltage deposition and differential arc oxidation. The method has the beneficial effects that the ceramic layer containing HA particles is prepared on the titanium test sample in the electrolyte solution, the process that the HA particles are deposited on the titanium metal test sample surface is simplified, and the content of HA in the film layer is changed through regulating the content of HA in the electrolyte solution or the deposition voltage and time.

Description

technical field [0001] The invention belongs to the technical field of surface treatment methods for titanium and titanium alloy implants, and relates to a method for preparing titanium metal HA-TiO 2 The method for the composite film layer is specifically, depositing a hydroxyapatite-titanium dioxide composite film layer on the surface of the titanium or titanium alloy. This film layer is a bioactive material and is mainly used in medical fields such as artificial bones and teeth. technical background [0002] As biomedical materials, titanium and titanium alloys have excellent biocompatibility and mechanical properties, and are one of the commonly used human implant materials. However, implants have problems such as poor biological activity, low bonding strength, and severe corrosion in physiological environments, which limit their further clinical applications. [0003] At present, the bioactivation of titanium metal surface is mainly realized by preparing bioactive coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D9/06
Inventor 时惠英马俊王爱娟蒋百灵
Owner XIAN UNIV OF TECH
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