A biomedical pure magnesium surface functional structured ion implantation modified layer and its preparation method and application

A technology of ion implantation and functional structure, applied in the direction of ion implantation plating, pharmaceutical formulations, coatings, etc., can solve the problems of ineffective effect, Y implantation layer cannot achieve long-term protection, accelerate the corrosion rate of the substrate, etc., to achieve corrosion resistance Performance improvement, rapid degradation rate, and the effect of increasing the magnesium potential

Active Publication Date: 2021-11-16
NANJING INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, Liu et al. injected Ag, Fe, and Y into the surface of Mg-1Ca respectively, and the results showed that Ag and Fe injections accelerated the corrosion rate of the matrix, while Y injection improved the corrosion resistance of magnesium alloys in simulated body fluids in a short period of time. Sex, but the effect is not obvious, and the Y injection layer can not achieve long-term protection effect

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  • A biomedical pure magnesium surface functional structured ion implantation modified layer and its preparation method and application
  • A biomedical pure magnesium surface functional structured ion implantation modified layer and its preparation method and application
  • A biomedical pure magnesium surface functional structured ion implantation modified layer and its preparation method and application

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Embodiment 1

[0045] A functional structured ion implantation modified layer on the surface of biomedical pure magnesium, including a manganese modified layer ion implanted and evenly distributed on the surface of the pure magnesium, the manganese modified layer includes manganese element located in the inner layer and a manganese modified layer located in the surface layer Mn-MnO mixed layer with increasing manganese oxide content from inside to outside. Both manganese element and manganese oxide are doped in pure magnesium.

[0046] A method for preparing a functional structured ion implantation modified layer on the surface of biomedical pure magnesium, comprising the following steps:

[0047] (1) Pretreatment: use different types of metallographic sandpaper and polishing machine to polish the pure magnesium, put it in absolute ethanol solution for ultrasonic treatment for 10 minutes, and dry it with hot air;

[0048] (2) Perform Mn ion implantation on the pretreated sample (Mn target p...

Embodiment 2

[0054] The only difference between this embodiment and embodiment 1 is that the injection dose is 2×10 17 ions / cm 2 , the temperature of the sample during the injection process was 25°C. The weight loss of the modified sample was 6.25 mg after soaking in SBF solution for 168 hours.

Embodiment 3

[0056] The difference between this embodiment and embodiment 1 is that the temperature of the sample during the injection process is 300°C. The weight loss of the modified sample was 3.84 mg after soaking in SBF solution for 168 hours.

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Abstract

The invention discloses a functional structured ion implantation modified layer on the surface of biomedical pure magnesium, which comprises a manganese modified layer ion-implanted and evenly distributed on the surface of the pure magnesium, and the manganese modified layer includes manganese in the inner layer Elemental substance and manganese oxide located on the surface with increasing content from inside to outside. The invention also discloses a preparation method of the biomedical pure magnesium surface functional structured ion implantation modification layer. The invention also discloses the application of a biomedical pure magnesium surface functional structured ion implantation modified layer in a degradable bone implant material. The invention enables pure magnesium to form uniform galvanic corrosion at the initial stage of immersion in simulated body fluid, and promotes the deposition of calcium-phosphorus compounds similar to human bone components. As time goes on, the corrosion type changes to uniform corrosion, achieving controllable degradation. On the basis of effectively improving the corrosion resistance of biomedical magnesium, the biocompatibility is further improved and the application range is expanded.

Description

technical field [0001] The invention relates to a biomedical pure magnesium surface functional structured ion implantation modification layer and a preparation method and application thereof, belonging to the technical field of surface modification of biomedical magnesium-based metal materials. Background technique [0002] Traditional bone implant materials mainly include stainless steel, titanium alloy and cobalt-chromium alloy, but these materials cause stress shielding effect, which is not conducive to the growth and healing of bone tissue, and is non-degradable, requiring a second operation to remove it. metal ions are biologically toxic. The density and elastic modulus of magnesium and magnesium alloys are close to those of natural bone, and they have good biocompatibility and degradability. The degraded magnesium ions can be absorbed by the human body to promote new bone growth and participate in human metabolism. Therefore, its In the field of biomedical devices, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/48C23C14/08C23C14/16C23C14/06A61L27/30A61L27/50A61L27/58A61L27/04
CPCA61L27/047A61L27/306A61L27/50A61L27/58A61L2400/18A61L2420/02A61L2420/06A61L2430/02C23C14/0688C23C14/082C23C14/16C23C14/48
Inventor 郏永强周星星巴志新陈贤王飞虎朱斌董强胜
Owner NANJING INST OF TECH
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