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

A flower-like hydroxyapatite, magnesium alloy technology, applied in metal material coating technology, coating, medical science and other directions, can solve the problem of not having nanostructure, and achieve to improve biological activity, improve corrosion resistance, and promote adhesion. The effect of adhering to growth

Inactive Publication Date: 2015-07-22
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 a hydroxyapatite-Mg(OH) 2 Conversion coating for magnesium.Corrosion Science and Gray-Munro et al., 2008.The mechanism of deposition of calcium phosphate coatings from solution onto magnesium alloy AZ31.Journal of Biomedical Materials Research Part A reported that using traditional biomimetic coating process on magnesium The hydroxyapatite coating prepared on the surface of the alloy is mostly a particle agglomeration structure, and usually does not have a nanostructure

Method used

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

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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 # SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 10 min, and dried with hot air.

[0037] (2) Prepare 150 mL of 2 mol / L NaOH deionized aqueous solution. The polished magnesium alloy was soaked in NaOH solution for 1 h at 60 °C, and then the magnesium alloy sample was rinsed with deionized water and dried.

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

Embodiment 2

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

[0043] (2) Prepare 150 mL of 3 mol / L NaOH deionized aqueous solution. The polished magnesium alloy was soaked in NaOH solution for 1 h at 70 °C, and then the magnesium alloy sample was rinsed with deionized water and dried.

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

Embodiment 3

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

[0049] (2) Prepare 150 mL of 1 mol / L NaOH deionized aqueous solution. The polished magnesium alloy was soaked in NaOH solution for 1 h at 80 °C, and then the magnesium alloy sample was rinsed with deionized water and dried.

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

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Abstract

The invention relates to a microwave preparation method of a flower-shaped hydroxyapatite coating layer on the surface of magnesium alloy. The method comprises the following steps: immersing a pretreated magnesium alloy sample in a conversion coating solution, placing the conversion coating solution in a microwave chemical reactor, heating the conversion coating solution to boiling, and maintaining boiling for 2-10min; and immediately taking out the coating coated magnesium alloy sample, rinsing by using deionized water, and drying. The hydroxyapatite coating layer is a flower-shaped structure formed through clustering of hydroxyapatite nano-rods, and the length and the diameter of the nano-rods are 300-900nm and 30-90nm respectively. The thickness of the coating layer is 2-10[mu]m. The hydroxyapatite coating layer with a nanometer structure improves the bioactivity of the magnesium alloy, and also improves the corrosion resistance of the magnesium in a simulated body fluid. The preparation method of the coating layer has the advantages of simplicity, economy, environmental protection and great commercial popularization values.

Description

technical field [0001] The invention relates to a microwave preparation method of a flower-like hydroxyapatite coating on the surface of magnesium alloys, 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 titanium alloys, stainless steel, and cobalt-chromium alloys that are widely used in clinical practice, the elastic modulus (41-45GPa) of magnesium alloys is closely related to 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. Magnesium alloys can be completely degraded and absorbed in the body. As an implant, it does not require secondary surgery. It is considered to be the most promising new biodegradable and absorbable metal implant mat...

Claims

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Application Information

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Patent Type & Authority Applications(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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