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A kind of biological magnesium alloy containing mesoporous silica and preparation method thereof

A technology of mesoporous silica and silica, applied in metal material coating process, coating and other directions, can solve the problems of mesoporous structure damage, long heat preservation time, pore wall collapse, etc., to improve corrosion resistance, maintain Activity, the effect of resolving structural damage

Inactive Publication Date: 2019-04-05
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 (particle size 50-100nm) and Mg-3Al-1Zn alloy powder (particle size 70-80μm). Weigh 0.5g SBA-15 powder and 9.5g Mg-3Al-1Zn alloy powder. 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 3 hours. The Mg-3Al-1Zn alloy with SBA-15 was prepared under the conditions of 99.999% high-purity argon protection, spot diameter 100μm, laser power 100W, scanning speed 150mm / min, scanning distance 80μm and spreading thickness 200μm.

[0027] The test found that the highly ordered mesoporous structure of SBA-15 was well preserved during the SLM forming process; in the human simulated body fluid culture experiment, it was found that compared to the Mg-3Al-1Zn alloy (the preparation method is completely consistent with Example 1 , The difference is that when the raw material is selected, it does not contain SBA-15 powder), and more...

Embodiment 2

[0029] The raw materials are SBA-15 powder (particle size 50-100nm) and Mg-3Al-1Zn alloy powder (particle size 70-80μm). Weigh 0.8g SBA-15 powder and 9.2g Mg-3Al-1Zn alloy powder. 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 3 hours. The Mg-3Al-1Zn alloy with SBA-15 was prepared under the conditions of 99.999% high-purity argon protection, spot diameter 100μm, laser power 100W, scanning speed 150mm / min, scanning distance 80μm and spreading thickness 200μm.

[0030] The test found that the highly ordered mesoporous structure of SBA-15 was well preserved during the SLM forming process; the weight loss experiment was used to study the corrosion resistance of the alloy. The results showed that after adding SBA-15, the Mg-3Al-1Zn alloy has The corrosion rate is reduced from 1.6mm / year to 0.5mm / year. At the same time, the compressive performance test result...

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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 silica and a preparation method thereof; it belongs to the technical field of implant design and preparation. Background technique [0002] Biomagnesium alloy has a density and elastic modulus similar to that of human bone, which can effectively relieve the stress shielding effect caused by the mismatch of the mechanical properties of the implant and the human bone. 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 and can be absorbed by the human body in time without side effects. Biomagnesium alloy also has good biocompatibility, osteoinductive properties and mechanical properties, and is a very potential degradable implant material. However, the magnesium alloy degrades too quickly in the human body, causing the implant to lose its mechanical integrity before the bone tiss...

Claims

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Application Information

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Patent Type & Authority Patents(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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