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Biomedical pure magnesium surface functional structured ion implantation modified layer and preparation method and application thereof

A technology of ion implantation and functional structure, applied in ion implantation plating, pharmaceutical formulations, coatings, etc., can solve the problems of accelerating the corrosion rate of the substrate, the effect is not obvious, and the Y implantation layer cannot provide long-term protection.

Active Publication Date: 2021-07-06
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

Method used

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  • Biomedical pure magnesium surface functional structured ion implantation modified layer and preparation method and application thereof
  • Biomedical pure magnesium surface functional structured ion implantation modified layer and preparation method and application thereof
  • Biomedical pure magnesium surface functional structured ion implantation modified layer and preparation method and application thereof

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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 biomedical pure magnesium surface functional structured ion implantation modified layer. The modified layer comprises a manganese modified layer which is subjected to ion implantation and is uniformly distributed on the pure magnesium surface. The manganese modified layer comprises a manganese simple substance positioned on the inner layer and manganese oxide positioned on the surface layer, wherein the content of the manganese oxide is gradually increased from inside to outside. The invention further discloses a preparation method of the biomedical pure magnesium surface functional structured ion implantation modified layer. The invention also discloses application of the biomedical pure magnesium surface functional structured ion implantation modified layer in degradable bone implant materials. According to the method, uniform galvanic corrosion can be formed at the initial soaking stage of pure magnesium in simulated body fluid, deposition of calcium-phosphorus compounds similar to human bone components is promoted, corrosion is converted into uniform corrosion along with time extension, controllable degradation is achieved, on the basis that the corrosion resistance of biomedical magnesium is effectively improved, 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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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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