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Preparation method of biodegradable magnesium alloy/calcium phosphate coating composite material

A technology of calcium phosphorus coating and composite materials, which is applied in the field of preparation of biomedical degradable materials, can solve the problems of material failure, too fast degradation, and no systematic evaluation standards and systems for clinical application performance, so as to improve corrosion resistance , reduce the degradation rate, promote the effect of research and application

Inactive Publication Date: 2014-01-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current problems faced by the clinical application of magnesium and magnesium alloys are mainly reflected in these two aspects. First, there is no systematic evaluation standard and system for the clinical application performance of magnesium and magnesium alloys in medicine. Second, in terms of materials science, magnesium and magnesium alloys face the problem of degrading too quickly after implantation in the body, leading to premature failure of the material

Method used

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  • Preparation method of biodegradable magnesium alloy/calcium phosphate coating composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Pretreatment of the substrate: the magnesium alloy is cut into moderately sized samples with a wire cutting machine, and polished with 2000# alumina water-resistant sandpaper to remove the oxide layer on the surface of the sample. Ultrasonic cleaning with water and ethanol for 10 min, and drying at room temperature for later use.

[0021] (2) Configuration of conversion solution: The conversion solution used was prepared from sodium dihydrogen phosphate dihydrate and calcium nitrate tetrahydrate, and a low-concentration conversion solution (as shown in Table 1) was prepared, wherein the solvent was deionized water.

[0022] (3) Preparation of biomimetic calcium-phosphorus coating: Put the processed sample and the transformation solution into the inner tank of the hydrothermal kettle. Cover, put the water heating kettle into the furnace to heat. Heat treatment at 100°C for 2.5 hours to prepare calcium phosphorus coating;

[0023] (4) Performance testing: corrosion ...

Embodiment 2

[0025] (1) Pretreatment of the substrate: the magnesium alloy is cut into moderately sized samples with a wire cutting machine, and polished with 2000# alumina water-resistant sandpaper to remove the oxide layer on the surface of the sample. Ultrasonic cleaning with water and ethanol for 20 min, and drying at room temperature for later use.

[0026] (2) Configuration of conversion solution: The conversion solution used was prepared from sodium dihydrogen phosphate dihydrate and calcium nitrate tetrahydrate, and a low-concentration conversion solution (as shown in Table 1) was prepared, wherein the solvent was deionized water.

[0027] (3) Preparation of biomimetic calcium-phosphorus coating: Put the processed sample and 80ml of conversion liquid into the inner tank of the hydrothermal kettle, the volume of the conversion solution accounts for 1 / 2 of the volume of the inner tank of the hydrothermal kettle, and tighten the water heating kettle Metal lid, put the hydrothermal ket...

Embodiment 3

[0030] (1) Pretreatment of the substrate: the magnesium alloy is cut into moderately sized samples with a wire cutting machine, and polished with 2000# alumina water-resistant sandpaper to remove the oxide layer on the surface of the sample. Water and ethanol ultrasonic cleaning for 30min, and dry at room temperature, set aside.

[0031] (2) Configuration of conversion solution: The conversion solution used was prepared from sodium dihydrogen phosphate dihydrate and calcium nitrate tetrahydrate, and a low-concentration conversion solution (as shown in Table 1) was prepared, wherein the solvent was deionized water.

[0032] (3) Preparation of biomimetic calcium-phosphorus coating: Put the processed sample and the transformation solution into the inner tank of the hydrothermal kettle. Cover, put the water heating kettle into the furnace to heat. Heat treatment at 140°C for 1.5h to prepare calcium phosphorus coating;

[0033] (4) Performance testing: corrosion performance chara...

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Abstract

The invention relates to a preparation method of a biodegradable magnesium alloy / calcium phosphate coating composite material. The preparation method comprises the steps of pre-treating a matrix, preparing a conversion liquid, and preparing a bionic calcium phosphate coating to obtain the biodegradable magnesium alloy / calcium phosphate coating composite material. Compared with the prior art, the preparation method has the advantages that the prepared ZK60 magnesium alloy / calcium phosphate coating composite material can be used for remarkably improving the corrosion resistance of a ZK60 magnesium alloy, greatly reducing the degradation rate of the ZK60 magnesium alloy in a bionic body liquid and promoting the research and application of the ZK60 magnesium alloy in the medical field.

Description

technical field [0001] The invention relates to a preparation method of a biomedical degradable material, in particular to a preparation method of a biodegradable magnesium alloy / calcium phosphorus coating composite material. Background technique [0002] Biomedical degradable materials are mainly used for diagnosing, treating, repairing or replacing damaged tissues and organs of organisms, and improving their functions. In recent years, research on medical magnesium and magnesium alloy materials has gradually become a research hotspot in the field of biomaterials. As a typical representative of degradable biomaterials, magnesium and magnesium alloy materials are called "revolutionary metal materials". and has attracted widespread attention domestically. Compared with other kinds of biological materials, the development of biomedical metal materials appears to be relatively slow in recent years. However, metal materials have the advantages of high strength, fatigue resista...

Claims

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Application Information

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IPC IPC(8): C23C22/05
Inventor 陆伟黄平
Owner TONGJI UNIV
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