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Double-layer whisker-like fluorine-doped hydroxyapatite coating on magnesium alloy and its microwave preparation method

A technology of hydroxyapatite and magnesium alloy, applied in coating, medical science, prosthesis and other directions, to achieve the effect of weakening dissolution and cracking, high crystallinity and dissolution resistance, and improving corrosion resistance

Inactive Publication Date: 2018-12-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of double-layer whisker-like fluorine-doped hydroxyapatite coatings on the surface of magnesium alloys.

Method used

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  • Double-layer whisker-like fluorine-doped hydroxyapatite coating on magnesium alloy and its microwave preparation method
  • Double-layer whisker-like fluorine-doped hydroxyapatite coating on magnesium alloy and its microwave preparation method
  • Double-layer whisker-like fluorine-doped hydroxyapatite coating on magnesium alloy and its microwave preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) AZ31 magnesium alloy was processed into a block of 10mm×10mm×2mm, polished to 2000 mesh with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water and ethanol for 10min, and dried with hot air.

[0037] (2) Prepare 150 mL of 2 mol / L NaOH deionized aqueous solution. Soak 10 polished magnesium alloys in NaOH solution at 60°C for 0.5h, then rinse the magnesium alloy samples with deionized water and dry them.

[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, using NaF as F source to prepare F - aqueous solution. Then PO 4 3- The aqueous solution was added dropwise with Ca 2+ In aqueous solution, stir evenly to form A solution; mix F - The aqueous solution was added dropwise to solution A, and stirred evenly to form solution B; finally, the pH value of solution B was adjusted to 6.0 with 10M dilute nitric acid, and magnetically stirred for 1 hour to ...

Embodiment 2

[0042] (1) AZ91 magnesium alloy was processed into a block of 10mm×10mm×2mm, polished to 1200 mesh 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 0.5 mol / L NaOH deionized aqueous solution. Soak five polished magnesium alloys in NaOH solution at 70°C for 1 hour, then rinse the magnesium alloy samples with deionized water and dry them.

[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. Preparation of F with KF as F source - aqueous solution. Then PO 4 3- The aqueous solution was added dropwise with Ca 2+ In the aqueous solution, stir evenly to form A solution, and mix F - The aqueous solution was added dropwise to the A solution, and stirred evenly to obtain the B solution. Finally, the pH value of solution B was adjusted to 5.5 with 7M dilute hydrochloric acid, and magn...

Embodiment 3

[0048](1) AZ61 magnesium alloy was processed into a block of 10mm×10mm×2mm, polished to 1500 mesh 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 1.5 mol / L NaOH deionized aqueous solution. Soak 15 polished magnesium alloys in NaOH solution at 80°C for 1.5h, then rinse the magnesium alloy samples with deionized water and dry them.

[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, using NaF as F source to prepare F - aqueous solution. Then PO 4 3- The aqueous solution was added dropwise with Ca 2+ In the aqueous solution, stir evenly to form A solution, and mix F - The aqueous solution was added dropwise to solution A, stirred evenly to form solution B, and finally the pH value of solution B was adjusted to 7.0 with 4M acetic acid, and magnetically stirred for 0.8...

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Abstract

The invention discloses a two-layer crystal whisker-shaped fluorine-doped hydroxyapatite coating on magnesium alloy and a microwave preparation method thereof, and belongs to the technical field of degradable magnesium alloy implantation materials. The fluorine-doped hydroxyapatite coating is of a two-layer structure. The length and diameter of the bottom-layer fluorine-doped hydroxyapatite crystal whisker is 0.5-0.8 micrometer and 50-70 nm respectively. The length and diameter of the top-layer fluorine-doped hydroxyapatite crystal whisker is 1.0-2.0 micrometers and 30-50 nm respectively. The microwave preparation method mainly comprises the steps that a conversion coating solution containing Ca2+, PO43- and F- is prepared, and magnesium alloy subjected to alkali treatment is placed in the conversion coating solution and subjected to microwave heating for 10-30 min. The microwave preparation method is applicable to magnesium alloy of any shapes and sizes, the technology is simple, energy is remarkably saved, and the application and popularization value is huge.

Description

technical field [0001] The invention relates to a double-layer whisker-like fluorine-doped hydroxyapatite coating on a magnesium alloy and a microwave preparation method thereof, belonging to the technical field of surface modification of degradable magnesium alloy implants. Background technique [0002] Medical 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. The 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. In addition, medical magnesium alloy can be completely degraded and absorbed in the body. As an implant, it does not require secondary surgery to remove it. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/32A61L27/50
CPCA61L27/32A61L27/50A61L2420/02A61L2420/08
Inventor 蔡舒申偲伯关东奇来凌瑞王丰武
Owner TIANJIN UNIV
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