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Medically degradable Zn-based composite and preparing method and application thereof

A composite material, zinc-based technology, used in medical science, prosthesis, surgery, etc., can solve the problem that the content of other elements cannot be too high, and cannot meet the requirements of rapid degradation of zinc alloys, and achieves adjustable degradation speed and easy to fall off. , the effect of fast degradation rate

Inactive Publication Date: 2019-11-08
湖南华耀百奥医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Pure zinc can adjust the mechanical properties and degradation properties of zinc alloys by means of microalloying, but due to the limitation of solid solubility and high melting point of the added trace elements in zinc alloys, the content of other elements added by microalloying cannot be too high
Moreover, during microalloying, trace elements will dissolve in the zinc matrix or form a zinc-containing second phase with zinc. The performance is not greatly affected, and it cannot meet the requirements of rapid degradation of zinc alloy as a bone implant material after 18 weeks of implantation

Method used

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  • Medically degradable Zn-based composite and preparing method and application thereof
  • Medically degradable Zn-based composite and preparing method and application thereof

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Embodiment 1

[0037] The element composition and mass percentage of the zinc-based composite material provided in this embodiment are: Zn: 99.5%, Fe: 0.5%.

[0038] The preparation method of the above-mentioned zinc-based composite material comprises the following steps:

[0039] (1) The particle size of the zinc powder is 25 μm, the particle size of the Fe powder is 50 μm, and the purity of all powders is 99.9%;

[0040] (2) Weigh various powders according to different usage requirements according to the mass ratio, and mix them evenly at room temperature;

[0041] (3) The mixed powder is placed in a mould, and it is pressed and formed at room temperature, and the pressing pressure is 50Mpa;

[0042] (4) Place the pressed composite material blank in a mold of the same size and specification, pressurize and sinter under nitrogen protection atmosphere, first raise the temperature to 200°C, keep it for 30 minutes, then continue to raise the temperature to 400°C, keep it for 5 minutes, the wh...

Embodiment 2

[0047] The element composition and mass percentage of the zinc-based composite material provided in this embodiment are: Zn 99.5%, Ag 0.5%.

[0048] The preparation method of the above-mentioned zinc-based composite material comprises the following steps:

[0049] (1) The particle size of zinc powder is 50 μm, the particle size of Ag powder is 50 μm, and the purity of all powders is above 99.9%;

[0050] (2) Weigh various powders according to different usage requirements according to the mass ratio, and mix them evenly at room temperature;

[0051] (3) The mixed powder is placed in a mould, and it is pressed and formed at room temperature, and the pressing pressure is 20Mpa;

[0052] (4) Place the pressed composite blank in a mold of the same size and specification, pressurize and sinter under nitrogen protection atmosphere, first raise the temperature to 250°C, keep it for 20 minutes, then continue to raise the temperature to 400°C, and keep it for 30 minutes. Keep the pressu...

Embodiment 3

[0056] The element composition and mass percentage of the zinc-based composite material provided in this embodiment are: Zn 99.5%, Ti 0.5%.

[0057] The preparation method of the above-mentioned zinc-based composite material comprises the following steps:

[0058] (1) The particle size of the zinc powder is 100 μm, the particle size of the Ti powder is 150 μm, and the purity of all powders is above 99.9%;

[0059] (2) Weigh various powders according to different usage requirements according to the mass ratio, and mix them evenly at room temperature;

[0060] (3) The mixed powder is placed in a mould, and it is pressed and formed at room temperature, and the pressing pressure is 50Mpa;

[0061] (4) Place the pressed composite material blank in a mold of the same size and specification, pressurize and sinter under nitrogen protection atmosphere, first raise the temperature to 250°C, keep it for 30 minutes, then continue to raise the temperature to 450°C, keep it for 30 minutes,...

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Abstract

The invention provides a medically degradable Zn-based composite and a preparing method and application thereof. The Zn-based composite is composed of, by mass percent, 50.1 to 99.9% of zinc and 0.1 to 49.9% of microelement. The microelement comprises one or multiple of Fe, Ag, Ti and Cu. The method comprises the steps of according to the proportion, zinc powder and powder containing the microelement are mixed evenly; the mixed powder is pressed and formed at the pressure of 5 to 50 MPa, and a blank is obtained; the blank is placed in a mold to be pressurized and sintered; and the pressurizedand sintered material is subjected to heat treatment, finally, extrusion forming is carried out, and the medically degradable Zn-based composite is obtained. When the Zn-based composite is applied tothe degradable medical equipment implant, the requirement of the mechanical property can be met, and the degrading speed can be regulated.

Description

technical field [0001] The invention relates to the field of preparation of biomedical materials, in particular to a medical degradable zinc-based composite material and its preparation method and application. Background technique [0002] Medically degradable metallic materials are regarded as revolutionary biomedical materials and have been extensively studied for vascular and orthopedic applications in the past two decades. [0003] Currently, magnesium-based, iron-based, and zinc-based alloys are used for biodegradable materials. Among them, although the degradation rate of the magnesium-based alloy is fast, its mechanical properties are poor and the corrosion is uneven. Although the mechanical properties of iron-based alloys are good, the degradation rate is too slow to reach the standard value. Zinc-based alloys are between the two in terms of mechanical properties and degradation properties, and are the development direction of degradable medical materials in the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/14B22F3/24C22C18/00C22C18/02A61L27/04A61L27/58A61L31/02A61L31/14
CPCA61L27/047A61L27/58A61L31/022A61L31/148B22F3/1017B22F3/14B22F3/24B22F2003/248C22C18/00C22C18/02
Inventor 余琨戴翌龙刘江宋坤杜兴江周功耀
Owner 湖南华耀百奥医疗科技有限公司
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