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Preparation method of titanium alloy/biological ceramic layer composite material

A composite material and bioceramic technology, which is applied in the field of preparation of titanium alloy/bioceramic layer composite materials, can solve the problems of thin coating, limitation of the geometric structure of the substrate, and small bonding force between the coating and the substrate. The effect of good biological properties and high interfacial bonding strength

Inactive Publication Date: 2011-03-30
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have achieved certain results in improving the osteoconductivity and biocompatibility of titanium alloys, but there are still many shortcomings, such as low bonding force between the coating and the substrate, too thin coating, and restrictions on the geometric structure of the substrate.

Method used

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  • Preparation method of titanium alloy/biological ceramic layer composite material
  • Preparation method of titanium alloy/biological ceramic layer composite material
  • Preparation method of titanium alloy/biological ceramic layer composite material

Examples

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preparation example Construction

[0024] The preparation method of the titanium alloy / bioceramic layer composite material, the specific steps are as follows:

[0025] In the first step, the pure titanium or titanium alloy substrate is pretreated according to conventional methods. First, the outer oxide layer is polished off and drilled, and then the metal substrate is cleaned with distilled water or absolute ethanol or acetone, preferably acetone. Then fix the connecting wire of metal aluminum or copper with a length of 20cm in the hole, preferably duralumin connecting wire. Titanium alloys can be commonly used biomaterials Ti-Al-V, Ti-Zr-Nb. The substrate can be block or mesh, and when it is a mesh substrate, the mesh aperture is ≤300 μm.

[0026] The second step: preparing an aqueous electrolyte solution containing Ca, P, and Si. The reagents and concentrations used are as follows: Ca(CH 3 COO) 2 ﹒ h 2 O concentration ≤ 0.2 mol. l -1 , preferably 0.03-0.07 mol. l -1 ;NaH 2 PO 4 ﹒ 2H 2 O concen...

Embodiment 1

[0031] The pure titanium substrate is pre-polished and drilled, polished to 800# with water-grinding sandpaper, drilled to fix the connecting wire, and then the titanium substrate is cleaned with absolute ethanol to obtain a clean pure titanium substrate. Fix a 20cm long copper wire in the hole. The reagents and concentrations used to prepare the electrolyte solution are Ca(CH 3 COO) 2 ﹒ h 2 O 0.03 mol. l -1 ;NaH 2 PO 4 ﹒ 2H 2 O 0.05 mol. l -1 ; Na 2 SiO 3 ﹒ 9H 2 O 0.02 mol. l -1 ; EDTA--2Na 0.03 mol. l -1 , NaOH 0.3 mol. l -1 . The solvent is distilled water, and the solution is stirred evenly with a stirrer. Dip the clean, pure titanium substrate into the electrolyte.

[0032] Using heteropolar pulse current power supply to prepare bio-oxidized ceramic layer, the selected parameters are: the positive current is constant at 0.5A, and the negative current is 0.5A; the positive and negative voltage will automatically increase from 0, and finally tend to a...

Embodiment 2

[0034] The pure titanium substrate is pre-polished and drilled, polished to 50# with water-grinding sandpaper, and the diameter of the drilled hole can be 4mm, and then the titanium substrate is cleaned with absolute ethanol. A 20cm long 2024 aluminum wire is fixed in the aperture. The reagents and concentrations used to prepare the electrolyte solution are Ca(CH 3 COO) 2 ﹒ h 2 O 0.07 mol. l -1 ;NaH 2 PO4﹒2H 2 O 0.06 mol. l -1 ; Na 2 SiO 3 ﹒ 9H 2 O 0.03mol. l -1 ; EDTA--2Na 0.03 mol. l -1 , NaOH 0.3 mol. l -1 . The solvent is distilled water, and the solution is stirred evenly with a stirrer.

[0035] Using heteropolar pulse current power supply to prepare bio-oxidized ceramic layer, the selected parameters are: the forward current is constant at 5A, and the negative current is 0A; the forward voltage will automatically increase from 0, and finally tend to a stable value; the pulse frequency is 500Hz; The positive and negative duty cycle is 40%. The prepa...

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Abstract

The invention discloses a preparation method of a titanium alloy / biological ceramic layer composite material. The method comprises the following steps of: fixing a metal connecting lead on a clean titanium substrate, and then dipping the titanium substrate into an electrolyte solution; and carrying out plasma electrolytic oxidation by adopting a heteropolar pulse current power supply to prepare a titanium oxide porous ceramic membrane composite material rich in Ca, P, Si and compounds thereof, wherein the solute in the electrolyte solution is rich in Ca, P and Si; the heteropolar pulse current power supply is characterized in that the forward / inverse current is 0-30A, the forward voltage is 0-750V, and the inverse voltage is 0-250; the pulse frequency is 50-1,500 Hz; the positive / negative duty cycle is 5-95 percent; the dead time is 0-60muS; the pulse number is 1-30; and the forward / inverse current and the forward / inverse voltage are not zero at the same time. The oxidation ceramic membrane and the titanium alloy substrate of the material have high interface bonding strength and excellent mechanical compatibility with bone tissues, and the porous structure and components of the oxidation membrane have excellent capacity of inducing and depositing apatite.

Description

Technical field [0001] The present invention involves titanium alloy biomaterials technology, which provides a preparation method for titanium alloy / biological ceramic layer composite materials. Background technique [0002] The expansion of human activity space and high standards for health and quality of life have promoted the development of biomedical materials.Modern biomedical materials must meet the requirements of biological safety, that is, non -toxicity, sensitivity, non -irritating, non -genetic toxicity and carcinogenicity of the human body, but also have good biocompatibility, that is, to human tissueThere are adverse reactions such as blood and immunity, and can produce the expected host reactions. [0003] Bone has the ability to regenerate and self -repair, but if the bone defects caused by tumor, trauma, bone disease, and bone abnormal growth, it is necessary to rely on the self -repair of the bone to heal, which needs to be treated with surgery and bone defect tr...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 郭平义邵勇
Owner JIANGSU UNIV OF SCI & TECH
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