Microwave preparation method of flower-like hydroxyapatite coating on magnesium alloy surface

A technology of flower-shaped hydroxyapatite and hydroxyapatite, which is applied in metal material coating technology, coating, medical science, etc., can solve the problems of not having nanostructure, so as to improve biological activity, promote adhesion and growth , Improve the effect of corrosion resistance

Inactive Publication Date: 2017-10-17
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as the literature Chen et al.,2011.A simple route towards ahydroxyapatite-Mg(OH) 2 conversion coating for magnesium.Corrosion Science and Gray-Munro et al., 2008.The mechanism of deposition of calcium phosphatecoatings from solution onto magnesium alloy AZ31.Journal of BiomedicalMaterials Research Part A reported that using traditional bionic coating process on the surface of magnesium alloy The prepared hydroxyapatite coatings are mostly particle agglomerated structures, usually without nanostructures

Method used

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  • Microwave preparation method of flower-like hydroxyapatite coating on magnesium alloy surface
  • Microwave preparation method of flower-like hydroxyapatite coating on magnesium alloy surface
  • Microwave preparation method of flower-like hydroxyapatite coating on magnesium alloy surface

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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 240 # , 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 150 mL of 2 mol / L NaOH deionized aqueous solution. Soak the polished magnesium alloy in NaOH solution at 60°C for 1 hour, then rinse the magnesium alloy sample with deionized water and dry it.

[0038] (3) with Ca(NO 3 ) 2 Prepare Ca for Ca source 2+ Aqueous solution, as Na 2 HPO 4 Preparation of PO for P source 4 3- aqueous solution. Then PO 4 3- The aqueous solution was added dropwise with Ca 2+ In the aqueous solution, the pH value of the mixed solution was finally adjusted to 6 with 20M dilute nitric acid, and magnetically stirred for 1 h. Among them, Ca in the mixed solution 2+ The concentration is 6mmol / L, PO 4 3- The concentration is 2mmol / L. Weigh 100mL of the mixed solution as the conversi...

Embodiment 2

[0042] (1) Process the AZ91 magnesium alloy into a block of 10mm×10mm×2mm, and use 240 # , 1200 # Polished with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 6 minutes, and dried with hot air.

[0043] (2) Prepare 150 mL of 3 mol / L NaOH deionized aqueous solution. Soak the polished magnesium alloy in NaOH solution at 70°C for 1 hour, then rinse the magnesium alloy sample with deionized water and dry it.

[0044] (3) with CaCl 2 Prepare Ca for Ca source 2+ Aqueous solution, as NaH 2 PO 4 Preparation of PO for P source 4 3- aqueous solution. Then PO 4 3- The aqueous solution was added dropwise with Ca 2+ In the aqueous solution, the pH value of the mixed solution was finally adjusted to 5 with 15M dilute hydrochloric acid, and magnetically stirred for 1.5 h. Among them, Ca in the mixed solution 2+ The concentration is 4mmol / L, PO 4 3- The concentration is 2mmol / L. Weigh 100mL of the mixed solution as the conversion coatin...

Embodiment 3

[0048] (1) AZ61 is used as the magnesium alloy matrix, followed by 240 # , 1200 # , 1500 # Polished with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 8 minutes, and dried with hot air.

[0049] (2) Prepare 150 mL of 1 mol / L NaOH deionized aqueous solution. Soak the polished magnesium alloy in NaOH solution at 80°C for 1 hour, then rinse the magnesium alloy sample with deionized water and dry it.

[0050] (3) with Ca(CH 3 COO) 2 Prepare Ca for Ca source 2+ Aqueous solution, as NaH 2 PO 4 Preparation of PO for P source 4 3- aqueous solution. Then PO 4 3- The aqueous solution was added dropwise with Ca 2+ In the aqueous solution, the pH value of the mixed solution was finally adjusted to 5.5 with 8M acetic acid, and magnetically stirred for 2 hours. Among them, Ca in the mixed solution 2+ The concentration is 5mmol / L, PO 4 3- The concentration is 1.5mmol / L. Weigh 100mL of the mixed solution as the conversion coating sol...

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Abstract

The invention relates to a microwave preparation method of a flower-shaped hydroxyapatite coating on the surface of a magnesium alloy. The pretreated magnesium alloy sample is soaked in a conversion coating solution, and the conversion coating solution is placed in a microwave chemical reactor , heating the conversion coating solution to boiling and keeping it for 2-10 minutes; then immediately take out the coated magnesium alloy sample, rinse it with deionized water, and dry it. The hydroxyapatite coating is a flower-like structure formed by clusters of hydroxyapatite nanorods, the length of the nanorods is 300-900nm, and the diameter of the nanorods is 30-90nm. The thickness of the coating is 2-10 μm. The nanostructured hydroxyapatite coating not only improves the biological activity of magnesium alloys, but also improves the corrosion resistance of magnesium alloys in simulated body fluids. The preparation process of the coating is simple, economical and environmentally friendly, and has great commercial promotion value.

Description

technical field [0001] The invention relates to a microwave preparation method of a flower-like hydroxyapatite coating on the surface of a magnesium alloy, and belongs to the technical field of surface modification of degradable magnesium alloy implants. Background technique [0002] Magnesium alloy has good biocompatibility, and its density is close to that of human bone tissue. Compared with materials such as titanium alloy, stainless steel, and cobalt-chromium alloy, which are widely used in clinical practice, the elastic modulus (41-45GPa) of magnesium alloy is similar to that of bone tissue. (10-30GPa) is more matched, which is beneficial to reduce the "stress shielding" effect of the interface between the implant and human bone tissue, and promote the growth of bone tissue. Moreover, magnesium alloy can be completely degraded and absorbed in the body. As an implant, it does not need a second operation to remove it. It is considered to be the most promising new type of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/73A61L27/32A61L27/50A61L31/08A61L31/14
Inventor 蔡舒申偲伯凌瑞李妍张敏张飞洋
Owner TIANJIN UNIV
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