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Nano-hydroxyapatite coating on magnesium alloy surface based on ultrasound and its preparation method

A nano-hydroxyapatite and hydroxyapatite technology, applied in metal material coating process, coating, pharmaceutical formulation and other directions, can solve problems such as unreported, achieve large surface roughness, simple equipment and uniform structure and dense effect

Active Publication Date: 2021-10-15
北京科技大学天津学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most of the ultrasonic method is used to prepare hydroxyapatite powder, not to directly prepare hydroxyapatite coating, and compared with other methods for preparing hydroxyapatite coating, one-step ultrasonic method is used to prepare hydroxyapatite The research on the coating has not been reported so far, especially the research on the long-term corrosion resistance of the modified magnesium alloy material prepared by ultrasonic method has not been reported.

Method used

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  • Nano-hydroxyapatite coating on magnesium alloy surface based on ultrasound and its preparation method
  • Nano-hydroxyapatite coating on magnesium alloy surface based on ultrasound and its preparation method
  • Nano-hydroxyapatite coating on magnesium alloy surface based on ultrasound and its preparation method

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preparation example Construction

[0030] A kind of preparation method of nano-hydroxyapatite coating on the surface of magnesium alloy based on ultrasound of the present invention, the specific preparation steps are as follows:

[0031] 1) Magnesium alloy surface pretreatment: use multiple sandpapers between 800-2000 meshes on the surface of magnesium alloys of a certain size and shape, and polish them in order from small to large meshes, and then successively polish them in acetone, deionized water, and ethanol. Medium ultrasonic cleaning for 5-10min, drying;

[0032] 2) Alkali treatment on the surface of magnesium alloy: Soak the pretreated magnesium alloy in a NaOH solution with a concentration of 1-2mol / L, keep it warm in a digital display constant temperature water bath at 60°C-90°C, and then wash it with deionized water ,drying;

[0033] 3) Preparation of calcium phosphorus coating solution: with Ca(NO 3 ) 2 or CaCl 2 Provides a source of Ca, with Na 2 HPO 4 , (NH 4 ) 2 HPO 4 or NaH 2 PO 4 Pro...

Embodiment 1

[0036] A method for preparing a nano-hydroxyapatite coating on the surface of a magnesium alloy based on ultrasound, comprising the steps of:

[0037] (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.

[0038] (2) Prepare 50 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.

[0039] (3) with Ca(NO 3 ) 2 Provides Ca source to NaH 2 PO 4 12H 2 O provides P source. Na 2 SiO 3 Formation of Si(OH) by hydrolysis 4 , providing OH - , Na 2 SiO 3 The concentration is 0.0038mol / L; then the P source aqueous solution is added dropwise to the Ca source aqueous solution and mixed, and then Na is added dropwise 2 SiO 3 solution, fi...

Embodiment 2

[0043] A method for preparing a nano-hydroxyapatite coating on the surface of a magnesium alloy based on ultrasound, comprising the steps of:

[0044] (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.

[0045] (2) Prepare 50 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.

[0046] (3) with Ca(NO 3 ) 2 Provides a source of Ca, with Na 2 HPO 4 , (NH 4 ) 2 HPO 4 or NaH 2 PO 4 12H 2 O provides P source. Na 2 SiO 3 Formation of Si(OH) by hydrolysis 4 , providing OH - , Na 2 SiO 3 The concentration is 0.0042mol / L; then the P source aqueous solution is added dropwise to the Ca source aqueous solution and mixed, and the...

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Abstract

The invention belongs to the technical field of surface modification of degradable magnesium alloy implants, and discloses a nano-hydroxyapatite coating on the surface of a magnesium alloy based on ultrasound and a preparation method thereof. The preparation method includes the steps of: After treatment with lye and containing Si(OH) 4 The nano-hydroxyapatite coating solution on the magnesium alloy surface is obtained after the coating coating reaction is carried out in an ultrasonic environment; to make. The coating of the invention has relatively large surface roughness, good long-term corrosion resistance and biological activity.

Description

technical field [0001] The invention belongs to the technical field of surface modification of degradable magnesium alloy implants, and in particular relates to a nano-hydroxyapatite coating on the surface of a magnesium alloy based on ultrasound and a preparation method thereof. Background technique [0002] Compared with traditional medical metal materials such as stainless steel, titanium alloys, NiTi shape memory alloys and cobalt-based alloys, magnesium and magnesium alloys have become more and more popular due to their unique biodegradable properties, mechanical properties similar to bone, and good biocompatibility. Important developments in the field of biomedical materials. The density of magnesium and magnesium alloys is very close to that of human bone, and the modulus of elasticity is much lower than that of titanium alloys, stainless steel, etc., which are more compatible with bone tissue and can effectively alleviate the "stress shielding" effect produced when t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/32A61L27/04A61L27/50A61L27/58C23C18/12
CPCA61L27/047A61L27/32A61L27/50A61L27/58A61L2400/18A61L2420/02A61L2430/02C23C18/1216C23C18/1241
Inventor 孙金娥蔡舒刘杰
Owner 北京科技大学天津学院