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Method for preparing magnesium alloy surface micro-nano structure hydroxyapatite coating through hydrothermal manner

A technology of hydroxyapatite and micro-nano structure, which is applied in the direction of coating, etc., to achieve the effects of good short-term corrosion resistance, good biological activity, and great commercial promotion value

Inactive Publication Date: 2019-02-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the existing preparation methods, the present invention provides a method for hydrothermally preparing a micro-nano-structured hydroxyapatite coating on the surface of magnesium alloys

Method used

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  • Method for preparing magnesium alloy surface micro-nano structure hydroxyapatite coating through hydrothermal manner
  • Method for preparing magnesium alloy surface micro-nano structure hydroxyapatite coating through hydrothermal manner
  • Method for preparing magnesium alloy surface micro-nano structure hydroxyapatite coating through hydrothermal manner

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Process the AZ31 magnesium alloy into a block of 10mm×10mm×2mm, and use 800 # , 1200 # , 2000 # Polished with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 10 minutes, and dried with hot air.

[0037] (2) Prepare 25 mL of NaOH solution with a concentration of 1.5 mol / L. Soak the polished magnesium alloy in the solution and keep it warm at 80°C for 1 hour, then wash the magnesium alloy sample with deionized water and dry it.

[0038] (3) With EDTA2NaCa as Ca source, KH 2 PO 4 Add distilled water to prepare the solution for the P source in turn; then use 2mol / L NaOH solution to adjust the pH value of the mixed solution to 9, and magnetically stir for 1h; wherein, the Ca in the mixed solution 2+ Concentration and PO 4 3- The concentration of each is 0.20mol / L, and 75ml of the solution is measured and poured into the autoclave.

[0039] (4) Put the NaOH-treated magnesium alloy sample into a high-pressure reaction kettle ...

Embodiment 2

[0042] (1) Process the AZ31 magnesium alloy into a block of 10mm×10mm×2mm, and use 800 # , 1200 # , 2000 # Polished with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 10 minutes, and dried with hot air.

[0043] (2) Prepare 25 mL of NaOH solution with a concentration of 1.5 mol / L. Soak the polished magnesium alloy in the solution and keep it warm at 80°C for 1 hour, then wash the magnesium alloy sample with deionized water and dry it.

[0044] (3) With EDTA2NaCa as Ca source, NaH 2 PO 4 Add distilled water to prepare the solution for the P source in turn; then use 2mol / L NaOH solution to adjust the pH value of the mixed solution to 9, and magnetically stir for 1h; wherein, the Ca in the mixed solution 2+ Concentration and PO 4 3- The concentration is 0.2mol / L.

[0045] (4) Put the NaOH-treated magnesium alloy sample into a high-pressure reaction kettle filled with reagents, put the reaction kettle into an oven at 100°C for 48 h...

Embodiment 3

[0048] (1) Process the AZ31 magnesium alloy into a block of 10mm×10mm×2mm, and use 800 # , 1200 # , 2000 # Polished with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 10 minutes, and dried with hot air.

[0049] (2) Prepare 25 mL of NaOH solution with a concentration of 1.5 mol / L. Soak the polished magnesium alloy in the solution and keep it warm at 80°C for 1 hour, then wash the magnesium alloy sample with deionized water and dry it.

[0050] (3) With EDTA2NaCa as Ca source, (NH 4 ) 2 HPO 4 Add distilled water to prepare the solution for the P source in turn; then use 2mol / L NaOH solution to adjust the pH value of the mixed solution to 9, and magnetically stir for 1h; wherein, the Ca in the mixed solution 2+ The concentration is 0.25mol / L, PO 4 3- The concentration of the solution is 0.1mol / L, and 75ml of the solution is measured and poured into the autoclave.

[0051] (4) Put the NaOH-treated magnesium alloy sample into a hi...

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Abstract

The invention relates to a method for preparing a magnesium alloy surface micro-nano structure hydroxyapatite coating through a hydrothermal manner. Firstly, a magnesium alloy is subject to surface polishing treatment; the magnesium alloy surface is ground, and is subjected to ultrasonic cleaning in sequence in acetone, deionized water and ethyl alcohol, and drying is carried out; the polished magnesium alloy is soaked in an NaOH solution with the concentration being 1-2mol / L, heat preservation is carried out in an oven with the temperature of 60 to 90 DEG C, deionized water is used for cleaning, and drying is carried out; the magnesium alloy sample pre-treated through the NaOH is placed in a high-pressure reaction kettle containing a hydrothermal reaction solution, the reaction kettle isplaced in the oven with the temperature of 100 to 140 DEG C to be subject to heat preservation, after cooling, the sample is taken out, and the sample is cleaned and dried; an HA coating of a micro-nano structure is divided into two layers, the upper layer is of a micro flower-shaped cluster structure composed of nanorods, and through gaps between clusters, it can be seen that the lower layer is of a uniform and compact nanorod structure. The coating has the long-time corrosion resistance, and has the large commercial popularizing value.

Description

technical field [0001] The invention relates to a hydrothermal method for preparing a hydroxyapatite coating with a micro-nano structure on a magnesium alloy, and belongs to the technical field of surface modification of degradable magnesium alloy implants. Background technique [0002] The density and yield strength of magnesium alloy are very close to natural bone density, and the modulus of elasticity is much lower than that of titanium alloy and stainless steel. Therefore, when used as an implant material, it can effectively alleviate the "stress shielding" effect. Moreover, magnesium alloys can be degraded in the human body and promote bone healing and growth, making them potential biomedical materials. However, magnesium alloys have poor corrosion resistance and are prone to degradation, resulting in the loss of inherent mechanical properties before the damaged tissue has fully healed. Moreover, the chemical composition of magnesium alloy is quite different from that ...

Claims

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Application Information

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IPC IPC(8): C23C18/12A61L27/32C23C18/04
CPCC23C18/1216A61L27/32C23C18/04
Inventor 蔡舒孙佳月林易树江松凌瑞韦洁玲
Owner TIANJIN UNIV
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