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Method for synthesizing hydroxyapatite-titanium oxide composite coating according to alternating current pulse electrochemical process

A hydroxyapatite, AC pulse technology, applied in coating, medical science, prosthesis and other directions, can solve the problems of low bonding strength and easy to fall off, large differences in the properties of coating and substrate materials, etc., to achieve mechanical properties and biological properties. The effect of improved compatibility, simple and easy synthesis process, and improved binding force

Inactive Publication Date: 2012-07-25
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 problems such as low bonding strength and 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 according to alternating current pulse electrochemical process
  • Method for synthesizing hydroxyapatite-titanium oxide composite coating according to alternating current pulse electrochemical process
  • Method for synthesizing hydroxyapatite-titanium oxide composite coating according to alternating current pulse electrochemical process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] ① The treated Ti6Al4V alloy was used as the working electrode, and the 316L stainless steel electrode was used as the auxiliary electrode; the Ca(NO 3 ) 2 , NaH 2 PO 4 and deionized water to configure the electrolyte, the Ca(NO 3 ) 2 The concentration is 0.042mol / L, NaH 2 PO 4 The concentration is 0.025mol / L, stir evenly;

[0019] ②Put the electrolyte prepared in ① into the electrolytic cell for electrodeposition. The relevant parameters are: AC pulse potential 110V, frequency 700Hz, duty cycle 30%, positive pulse width 70%, negative pulse width 50% , The reaction time is 20min.

[0020] ③The composite material prepared in ② was placed in an autoclave filled with 100mL 0.001mol / L NaOH solution, and reacted at 140°C for 6h to obtain a biomedical metal with a hydroxyapatite-titanium oxide composite coating.

[0021] The XRD spectrogram, SEM photo, EDX energy spectrum and side EPMA photo of the obtained biomedical metal of the present embodiment are respectively ob...

Embodiment 2

[0025] ① The treated TiNi alloy is used as the working electrode, and the 316L stainless steel electrode is used as the auxiliary electrode; the Ca(NO 3 ) 2 , NaH 2 PO 4 and deionized water to configure the electrolyte, the Ca(NO 3 ) 2 The concentration is 0.042mol / L, NaH 2 PO 4 The concentration is 0.025mol / L, stir evenly;

[0026] ② Put the electrolyte configured in ① into the electrolytic cell for electrodeposition. The relevant parameters are: AC pulse potential 110V, frequency 700Hz, duty cycle 30%, positive pulse width 70%, negative pulse width 50% , the reaction time is 20min;

[0027] ③The composite material prepared in ② was placed in an autoclave filled with 100mL 0.001mol / L NaOH solution, and reacted at 140°C for 6h to obtain a biomedical metal with a hydroxyapatite-titanium oxide composite coating.

Embodiment 3

[0029] The steps are the same as in Example 1, but the reaction time in step 2 is 30min, and the reaction condition of step 3 is in an autoclave with 100mL0.001mol / L NaOH solution, and the composite material is reacted at 120°C for 8h to obtain a compound with hydroxyapatite-titanium oxide Composite coating of biomedical metals.

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Abstract

The invention relates to a method for synthesizing a hydroxyapatite-titanium oxide composite coating by using an alternating current pulse electrochemical process. According to the method, with a solution containing calcium ions and phosphate radical ions as an electrolyte, a compact and uniform composite coating is synthesized by the alternating current pulse electrochemical process. The synthesizing process is simple and is easily performed, the obtained composite coating is a single coating with dispersedly distributed HA and TiO2, a ratio of Ca to P is 1.671, a bonding force of the composite coating and a matrix is greatly increased, and the mechanical property and the biocompatibility of the composite material are both excellently improved.

Description

technical field [0001] The invention relates to a preparation method for synthesizing a hydroxyapatite-titanium oxide composite coating on the surface of a medical biological material through an alternating current pulse electrochemical method, in particular to the preparation of a biometal material surface coating suitable for repairing human bone damage. Background technique [0002] Due to its excellent corrosion resistance and mechanical properties similar to those of bone, titanium alloys are widely used in surgical implants. However, titanium alloy has poor blood compatibility, cannot form chemical bonds with bone, and is difficult to promote bone growth, so its surface modification is of great significance. Among the surface modification materials, calcium phosphate series ceramic coatings have good biocompatibility and bioactivity, and have been successfully applied clinically, especially hydroxyapatite (HA) has attracted much attention. However, due to the large di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26A61L27/42A61L27/32
Inventor 梁成浩吴波黄乃宝
Owner DALIAN MARITIME UNIVERSITY