Preparation method of submicron antibacterial silver particles on magnesium alloy surface

An antibacterial silver and sub-micron technology, applied in the field of metal surface treatment, can solve the problems of no antibacterial function of the modified layer, weak corrosion resistance of magnesium alloys, poor corrosion resistance of magnesium alloys, etc., and achieve the effect of reducing the probability of local inflammatory reactions

Active Publication Date: 2015-12-09
江苏凯晞投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the poor corrosion resistance of magnesium alloys, bioimplantation devices made of magnesium alloys often cause local inflammatory reactions due to rapid corrosion at the initial stage of implantation. Therefore, the preparation on the surface of magnesium alloy biodevices does not change its biodegradation characteristics At the same time, particles with certain antibacterial functions are of great significance
At present, the method of modifying the surface of magnesium alloys is often used to improve the corrosion resistance of magnesium alloys. However, the corrosion resistance of magnesium alloys after modification by common methods is still weak, and the modified layer has no antibacterial function, so it cannot be adapted to medical devices. product needs

Method used

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  • Preparation method of submicron antibacterial silver particles on magnesium alloy surface
  • Preparation method of submicron antibacterial silver particles on magnesium alloy surface
  • Preparation method of submicron antibacterial silver particles on magnesium alloy surface

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A method for preparing submicron antibacterial silver particles on the surface of a magnesium alloy, comprising a degreasing step, a water washing step, a step of preparing submicron antibacterial silver particles, a water washing step, an alcohol washing step and a drying step, wherein the degreasing step, the water washing step, the water washing step Step, alcohol washing step and drying step all adopt the conventional method, and the main inventive point of the present invention is to improve the step of preparing submicron antibacterial silver particles. Therefore, the present embodiment aims at preparing the step of submicron antibacterial silver particles. Further details.

[0015] First, put the degreasing and water-washed Mg-Nd-Zn-Zr magnesium alloy sample together with a silver nitrate solution with a silver nitrate concentration of 20 g / L into a high-temperature-resistant glass reaction vessel, and the treated magnesium The alloy sample is suspended above the...

Embodiment 2

[0019] The operating steps of this embodiment are basically the same as in Embodiment 1, specifically:

[0020] First, put the degreasing and water-washed Mg-Nd-Zn-Zr magnesium alloy sample together with a silver nitrate solution with a silver nitrate concentration of 20 g / L into a high-temperature-resistant glass reaction vessel, and the treated magnesium The alloy sample is suspended above the solution containing silver ions, and the two are not in contact.

[0021] Then, put the reaction container into an oven and turn on the power to heat it. When the temperature reaches 150°C, start timing. After keeping the temperature at 150°C for 90 minutes, the sample is taken out, washed with water and alcohol, and dried to obtain a submicron surface. Magnesium alloy with antimicrobial silver particles.

[0022] Observation of the surface morphology of the magnesium alloy prepared by the above method with a scanning electron microscope shows that the surface of the magnesium alloy s...

Embodiment 3

[0024] The operating steps of this embodiment are basically the same as in Embodiment 1, specifically:

[0025] First, put the degreasing and water-washed Mg-Nd-Zn-Zr magnesium alloy sample together with a silver nitrate solution with a silver nitrate concentration of 30 g / L into a high-temperature-resistant glass reaction vessel, and the treated magnesium The alloy sample is suspended above the solution containing silver ions, and the two are not in contact.

[0026] Then, put the reaction container into an oven and turn on the power to heat it. When the temperature reaches 200°C, start timing. After keeping the temperature at 200°C for 30 minutes, the sample is taken out, washed with water and alcohol, and dried to obtain a surface with a submicron surface. Magnesium alloy with antimicrobial silver particles.

[0027] Observing the surface morphology of the magnesium alloy prepared by the above method with a scanning electron microscope shows that many submicron white parti...

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Abstract

The invention discloses a method for preparing submicron antibacterial silver particles on the surface of a magnesium alloy, which comprises a degreasing step, a water washing step, a step of preparing submicron antibacterial silver particles, a water washing step, an alcohol washing step and a drying step. The preparation of the submicron antibacterial The specific method of the silver particle step is: put the silver ion-containing solution into the reaction container, and at the same time, place the treated magnesium alloy sample in the air above the silver ion-containing solution, and heat it to 150°C-300°C to make the silver ion-containing solution The solution was vaporized and kept warm for 15min to 90min, then the sample was taken out. The invention uses the gas-solid reaction technology in the gas phase environment to effectively control the concentration of silver ions in the interface region between the gas and the solid surface, thereby controlling the growth rate of silver particles on the surface of the magnesium alloy, obtaining fine submicron silver particles, and maintaining the magnesium alloy Improve the corrosion resistance of magnesium alloys while improving the biodegradability.

Description

technical field [0001] The invention relates to a method for preparing submicron antibacterial silver particles, in particular to a method for preparing submicron antibacterial silver particles on the surface of magnesium alloys, and belongs to the technical field of metal surface treatment. Background technique [0002] Magnesium alloy is a biodegradable metal material, which has broad application prospects in biological implant devices such as bone plates, bone nails, and vascular stents. However, due to the poor corrosion resistance of magnesium alloys, bioimplantation devices made of magnesium alloys often cause local inflammatory reactions due to rapid corrosion at the initial stage of implantation. Therefore, the preparation on the surface of magnesium alloy biodevices does not change its biodegradation characteristics At the same time, particles with certain antibacterial functions are of great significance. At present, the method of modifying the surface of magnesiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/68C23C22/73
Inventor 方信贤章晓波王强王章忠
Owner 江苏凯晞投资有限公司
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