Method for synthesizing hydroxyapatite-titanium oxide composite coating by adopting microarc oxidation method and potentiostatic method

A technology of hydroxyapatite and micro-arc oxidation, which is applied in coatings, electrolytic inorganic material coatings, etc., can solve problems such as low bonding strength and easy peeling off, large differences in properties between coatings and substrate materials, and difficulty in fully satisfying clinical applications. , to achieve the effect of improving the binding force

Inactive Publication Date: 2012-06-13
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large difference in the properties of the coating and the base material, the HA coating has low bonding strength and is easy to fall off, so it is difficult to fully meet the needs of clinical applications.

Method used

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  • Method for synthesizing hydroxyapatite-titanium oxide composite coating by adopting microarc oxidation method and potentiostatic method
  • Method for synthesizing hydroxyapatite-titanium oxide composite coating by adopting microarc oxidation method and potentiostatic method
  • Method for synthesizing hydroxyapatite-titanium oxide composite coating by adopting microarc oxidation method and potentiostatic method

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Experimental program
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Effect test

Embodiment 1

[0022] ① Micro-arc oxidation: The pretreated Ti6Al4V alloy is used as the working electrode, and the brass electrode is used as the auxiliary electrode; 20g / L sodium silicate solution is prepared with deionized water, and a two-electrode system is used for micro-arc oxidation synthesis to obtain a titanium oxide coating. layer of Ti6Al4V alloy;

[0023] The parameters of micro-arc oxidation: the voltage of micro-arc oxidation is 200V, the pulse frequency is 14000Hz, the duty cycle is 40%, and the reaction time is 10min;

[0024] ②Constant potential electrolysis: with Ca(NO 3 ) 2 , NaH 2 PO 4 and deionized water to configure the electrolyte, the Ca(NO 3 ) 2 The concentration is 0.168mol / L, NaH 2 PO 4 The concentration is 0.100mol / L, stir well; the Ti6Al4V alloy electrode with titanium oxide coating prepared in step ① is used as the working electrode, and the platinum electrode is used as the auxiliary electrode to carry out the constant potential electrolysis reaction. T...

Embodiment 2

[0032] ① Micro-arc oxidation: The treated TiNi alloy is used as the working electrode, and the brass electrode is used as the auxiliary electrode; 20g / L sodium silicate solution is prepared with deionized water, and a two-electrode system is used for micro-arc oxidation synthesis; micro-arc oxidation parameters: The micro-arc oxidation voltage is 200V, the pulse frequency is 14000Hz, the duty cycle is 40%, and the reaction time is 10min;

[0033] ②Ca(NO 3 ) 2 , NaH 2 PO 4 and deionized water to configure the electrolyte, the Ca(NO 3 ) 2 The concentration is 0.168mol / L, NaH 2 PO 4 The concentration is 0.100mol / L, stir well; use the TiNi alloy electrode prepared in step ① as the working electrode, and the platinum electrode as the auxiliary electrode to carry out the constant potential electrolysis reaction. The electrolysis parameters are: the constant potential voltage is -3.25V, and the reaction time is 75min;

[0034] ③Place the TiNi alloy composite material prepared ...

Embodiment 3

[0036] ① Micro-arc oxidation: The pretreated Ti6Al4V alloy is used as the working electrode, and the brass electrode is used as the auxiliary electrode; 20g / L sodium silicate solution is prepared with deionized water, and the two-electrode system is used for micro-arc oxidation synthesis; the parameters of micro-arc oxidation : The micro-arc oxidation voltage is 300V, the pulse frequency is 14000Hz, the duty cycle is 40%, and the reaction time is 10min;

[0037] ②Constant potential electrolysis: with Ca(NO 3 ) 2 , NaH 2 PO 4 and deionized water to configure the electrolyte, the Ca(NO 3 ) 2 The concentration is 0.168mol / L, NaH 2 PO 4 The concentration is 0.100mol / L, stir well; use the Ti6Al4V alloy electrode prepared in step ① as the working electrode, and the platinum electrode as the auxiliary electrode to carry out the constant potential electrolysis reaction. The electrolysis parameters are: the constant potential voltage is -3.0V, and the reaction time is 75min;

[...

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Abstract

A method for synthesizing hydroxyapatite-titanium oxide composite coating by adopting the microarc oxidation method and the potentiostatic method comprises the following steps: preparing a titanium oxide coating with a solution containing silicate by adopting the microarc oxidation method, configuring an electrolyte with raw materials such as calcium ions and phosphate radicals, and preparing a hydroxyapatite coating on the surface of the titanium oxide coating by adopting the potentiostatic method. Through the adoption of the invention, a TiO2 coating with circular micropores is formed on the surface of Ti6Al4V alloy after microarc oxidation; the surface is a composite coating after constant potential and hydrothermal synthesis; HA and titanium oxide in the composite coating are distributed on two layers respectively; the surface is flaky HA crystal and contains a small quantity of Na4P2O7.10H2O and Ca(OH)2; and the Ca / P ratio is 1.669. The method has the advantages that the binding force between the composite coating and a base body is greatly improved; and the influence on the mechanical property and the biocompatibility of a composite material is better.

Description

technical field [0001] The invention relates to a method for preparing a hydroxyapatite-titanium oxide composite coating on the surface of a titanium alloy through micro-arc oxidation-constant potential electrosynthesis, and is especially suitable for the preparation of a biometal material surface coating for repairing human bone damage. The prepared metal matrix composite can be effectively used as a substitute material for load-bearing bone. Background technique [0002] As a replacement material for bone tissue, titanium alloy has good mechanical properties, but poor biocompatibility. Therefore, surface modification is required in practical applications. In the surface modification technology, micro-arc oxidation can prepare porous titanium oxide coating on the surface of titanium alloy and is closely combined with the substrate, so it is widely used. At the same time, as the main inorganic component of bone tissue, hydroxyapatite (HA) has good biocompatibility and is a...

Claims

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Application Information

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IPC IPC(8): C25D9/04C25D11/26A61L27/32
Inventor 梁成浩吴波黄乃宝
Owner DALIAN MARITIME UNIVERSITY
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