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Biological magnesium alloy containing mesoporous silica and preparation method of biological magnesium alloy

A technology of mesoporous silica and silica, which is applied in the coating process and coating of metal materials, can solve the problems of mesoporous structure damage, long holding time, and pore wall collapse, so as to improve corrosion resistance and maintain Activity, the effect of solving structural damage

Inactive Publication Date: 2018-03-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few studies on the improvement of the corrosion resistance of bio-magnesium alloys by mesoporous silica. For a long time, the pore wall of mesoporous silica may collapse under the action of high temperature for a long time, resulting in the destruction of the mesoporous structure
Therefore, the effective incorporation of mesoporous silica as a second phase into biomagnesium alloys is a major challenge.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The raw materials are SBA-15 powder (50-100nm particle size) and Mg-3Al-1Zn alloy powder (70-80μm particle size), weighing 0.5g SBA-15 powder and 9.5g Mg-3Al-1Zn alloy powder, in SF 6 and CO 2 Under the protection of gas, a uniformly dispersed magnesium alloy / SBA-15 mixed powder was obtained after ball milling in a ball mill at a speed of 400r / min for 3h. The Mg-3Al-1Zn alloy added with SBA-15 was prepared under the SLM process conditions of 99.999% high-purity argon protection, spot diameter of 100 μm, laser power of 100 W, scanning speed of 150 mm / min, scanning distance of 80 μm and powder thickness of 200 μm.

[0027] The test found that the highly ordered mesoporous structure of SBA-15 was well preserved during the SLM forming process; it was found in the human simulated body fluid culture experiment that compared to the Mg-3Al-1Zn alloy (its preparation method is completely consistent with Example 1 , the difference is that when the raw material is selected, it d...

Embodiment 2

[0029] The raw materials are SBA-15 powder (50-100nm particle size) and Mg-3Al-1Zn alloy powder (70-80μm particle size), weighing 0.8g SBA-15 powder and 9.2g Mg-3Al-1Zn alloy powder, in SF 6 and CO 2 Under the protection of gas, a uniformly dispersed magnesium alloy / SBA-15 mixed powder was obtained after ball milling in a ball mill at a speed of 400r / min for 3h. The Mg-3Al-1Zn alloy added with SBA-15 was prepared under the SLM process conditions of 99.999% high-purity argon protection, spot diameter of 100 μm, laser power of 100 W, scanning speed of 150 mm / min, scanning distance of 80 μm and powder thickness of 200 μm.

[0030] The test found that the highly ordered mesopore structure of SBA-15 was well preserved during the SLM forming process; the corrosion resistance of the alloy was studied by weight loss experiments, and the results showed that after adding SBA-15, the Mg-3Al-1Zn alloy The corrosion rate is reduced from 1.6mm / year to 0.5mm / year. At the same time, the co...

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Abstract

The invention relates to biological magnesium alloy containing mesoporous silica and a preparation method of the biological magnesium alloy and belongs to the technical field of design and preparationof implants. The biological magnesium alloy comprises a magnesium alloy base body and mesoporous silica, and the mesoporous silica is nanometer-level mesoporous silica. The preparation method of thebiological magnesium alloy comprises the following steps: performing ball-milling activation, mixing and preparing by adopting an SLM technology to obtain the biological magnesium alloy containing themesoporous silica. The preparation method provided by the invention is reasonable in ingredient design and structural design, and the designed and prepared biological magnesium alloy meets the requirements of a human body in degradation speed and bio-mineralization capability and is convenient for large-scale application.

Description

technical field [0001] The invention relates to a biological magnesium alloy containing mesoporous silicon dioxide and a preparation method thereof, belonging to the technical field of implant design and preparation. Background technique [0002] Bio-magnesium alloys have a density and elastic modulus similar to those of human bones, which can effectively alleviate the stress shielding effect caused by the mismatch between the mechanical properties of implants and human bones. At the same time, it can be gradually degraded in the human environment, and the magnesium ions produced are essential biological elements for the human body, which can be absorbed by the human body in time without causing side effects. Biomagnesium alloys also have good biocompatibility, osteoinductive properties, and mechanical properties, and are a very promising biodegradable implant material. However, magnesium alloys degrade too quickly in the human body, causing the implant to lose its mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C32/00C22C1/10C22C1/02C23C24/10
CPCC22C1/1036C22C23/02C22C32/0015C23C24/103
Inventor 帅词俊高成德
Owner CENT SOUTH UNIV
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