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Surface modified magnesium alloy material as well as preparation method thereof and application thereof

A surface modification, magnesium alloy technology, applied in surface reaction electrolytic coatings, pharmaceutical formulations, electrolytic coatings, etc., can solve the problems of fast degradation rate, implantation failure, etc., to improve corrosion resistance and improve biological properties. Effect

Active Publication Date: 2017-05-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the existing medical magnesium alloy is used as a bone tissue repair material, its degradation rate is too fast, which easily leads to implant failure, and a new composite coating and its preparation method are provided to meet the clinical requirements for magnesium alloy degradation. The need for speed and biocompatibility

Method used

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  • Surface modified magnesium alloy material as well as preparation method thereof and application thereof
  • Surface modified magnesium alloy material as well as preparation method thereof and application thereof
  • Surface modified magnesium alloy material as well as preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] AZ31 magnesium alloy sheets with a thickness of 2 mm and a length and width of 10 mm were used to remove the surface oxide layer with 1000-mesh SiC sandpaper, and then ultrasonically cleaned with alcohol. Then carry out micro-arc oxidation treatment, the electrolyte is 0.1M potassium hydroxide, 0.04M sodium silicate, 0.2M potassium fluoride, the current is 0.8A, the positive and negative frequency ratio is 2, the duty cycle is 10%, and the frequency for 800. The reaction cut-off voltage is 360V. The resulting sample was labeled PEO.

[0042] Fig. 1(a) is a scanning electron microscope image of the surface morphology of the magnesium alloy obtained through the modification treatment of this embodiment. It can be seen from the figure that there are many micron-sized holes on the surface after treatment, and the holes are evenly distributed. And it can be seen from the high-magnification scanning electron microscope pictures that the surface of magnesium oxide also cont...

Embodiment 2

[0044] AZ31 magnesium alloy sheets with a thickness of 2 mm and a length and width of 10 mm were used to remove the surface oxide layer with 1000-mesh SiC sandpaper, and then ultrasonically cleaned with alcohol. Then carry out hydrothermal treatment, the reaction temperature is 120°C, the hydrothermal solution is 50ml of 0.02M aluminum nitrate solution, and the pH value is adjusted to 12.8 with sodium hydroxide or potassium hydroxide, and the reaction time is 12h. The resulting sample was labeled LDH.

[0045] Fig. 1(b) is a scanning electron microscope image of the surface morphology of the magnesium alloy obtained through the modification treatment of this embodiment. It can be seen from the figure that the treated surface is a layer of dense nanosheet-like structure. figure 2 (LDH) provides the XRD pattern of the sample surface after the treatment of the present embodiment. As can be seen from the figure, the structure of the material surface after treatment is a mixed pha...

Embodiment 3

[0047] The sample processed in Example 1 was subjected to the hydrothermal treatment in Example 2. The resulting sample was labeled PEO / LDH.

[0048] Fig. 1(c) is a scanning electron microscope image of the surface morphology of the magnesium alloy obtained through the modification treatment of this embodiment. It can be seen from the figure that the treated surface is a layer of dense nanosheet-like structure, and the pores generated during the micro-arc oxidation process are basically filled by the nanosheet-like structure. figure 2 (PEO / LDH) provides the XRD pattern of the sample surface after the treatment of this embodiment, as can be seen from the figure, the structure of the material surface after treatment is pure magnesium aluminum layered double metal hydroxide, due to the flaky Magnesium oxide covered by the layered magnesium-aluminum bimetallic hydroxide layer was also detected at the nanoscale. The XPS test shows that the magnesium-aluminum atomic ratio in the m...

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Abstract

The invention relates to a surface modified magnesium alloy material as well as a preparation method thereof and an application thereof. The surface of the surface modified magnesium alloy material has a micro-nano composite structure, and comprises a magnesium oxide layer and magnesium-aluminum lamellar double-metal hydroxides, wherein the magnesium oxide layer is generated on the magnesium alloy surface in situ and has micron-sized holes; and the magnesium-aluminum lamellar double-metal hydroxides are generated in the holes of the magnesium oxide layer in situ, and the surfaces of the hydroxides have naono sheet structures. The surface modified magnesium alloy material has excellent corrosion resistance and biocompatibility, and can be widely applied to magnesium alloy medical apparatuses and instruments relevant to bone tissue repair.

Description

technical field [0001] The invention relates to a biomedical surface-modified magnesium alloy material and a surface modification method thereof, in particular to a method of first constructing a micron-scale magnesium oxide structure on the surface of the material by micro-arc oxidation, and then further utilizing hydrothermal treatment to construct a nano-sized magnesium alloy structure on the surface. The invention discloses a modification method of magnesium-aluminum layered double metal hydroxide, which belongs to the technical field of metal material surface modification. Background technique [0002] At present, most of the bone tissue repair materials used clinically are non-degradable metals, such as titanium alloys, nickel-titanium alloys, stainless steel, and the like. If the non-degradable implant remains in the body, it may have a rejection reaction to the human tissue, and if there is a problem with the lesion again, it will directly affect the treatment again....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C25D11/30C22F1/06A61L27/30A61L27/56A61L27/04
CPCA61L27/047A61L27/306A61L27/56A61L2400/18A61L2430/02C22C23/00C22F1/06C25D11/026C25D11/30
Inventor 刘宣勇彭锋
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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