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Active coating with self-healing function on magnesium-based surface and preparation method thereof

An active coating, self-healing technology

Active Publication Date: 2020-05-22
陕西佳诺博奥生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a degradable active coating with "self-healing" function prepared on the surface of magnesium alloy to solve the problem that the existing magnesium alloy surface coating cannot effectively inhibit the excessive degradation of magnesium alloy in the physiological environment preparation method

Method used

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  • Active coating with self-healing function on magnesium-based surface and preparation method thereof
  • Active coating with self-healing function on magnesium-based surface and preparation method thereof
  • Active coating with self-healing function on magnesium-based surface and preparation method thereof

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Embodiment 1

[0045] The preparation method of the active coating with self-healing function on the magnesium-based surface comprises the following steps:

[0046] Step 1. Perform micro-arc oxidation. The parameters of the micro-arc oxidation are set as follows: the frequency of the micro-arc oxidation arc is 100 Hz, the positive pressure is 450 V, and the duty cycle is 26%. In the micro-arc oxidation process, the pure magnesium or magnesium alloy disc is used as the anode, and the stainless steel electrolytic cell is used as the cathode. The composition and concentration of the electrolyte are: NaOH 0.125mol / L, Ca(OH) 2 0.0135mol / L, β-Na2GP 0.02mol / L. During the preparation process, a cooling system was used to control the temperature of the micro-arc oxidation electrolyte at 273K. After the prepared samples were washed with alcohol and deionized water, they were placed in a dry box for later use. Obtain the magnesia coating containing phosphorus and calcium, and its surface SEM photos ...

Embodiment 2

[0056] The preparation method of the active coating with self-healing function on the magnesium-based surface comprises the following steps:

[0057] Step 1. Perform micro-arc oxidation. The parameters of the micro-arc oxidation are set as follows: the frequency of the micro-arc oxidation arc is 100 Hz, the positive pressure is 450 V, and the duty cycle is 26%. In the micro-arc oxidation process, the pure magnesium or magnesium alloy disc is used as the anode, and the stainless steel electrolytic cell is used as the cathode. The composition and concentration of the electrolyte are: NaOH 0.125mol / L, Ca(OH) 2 0.0135mol / L, β-Na2GP 0.02mol / L. During the preparation process, a cooling system was used to control the temperature of the micro-arc oxidation electrolyte at 273K. After the prepared samples were washed with alcohol and deionized water, they were placed in a dry box for later use. Obtain the magnesia coating containing phosphorus and calcium, and its surface SEM photos ...

Embodiment 3

[0067] The preparation method of the active coating with self-healing function on the magnesium-based surface comprises the following steps:

[0068] Step 1. Perform micro-arc oxidation. The parameters of the micro-arc oxidation are set as follows: the frequency of the micro-arc oxidation arc is 100 Hz, the positive pressure is 450 V, and the duty cycle is 26%. In the micro-arc oxidation process, the pure magnesium or magnesium alloy disc is used as the anode, and the stainless steel electrolytic cell is used as the cathode. The composition and concentration of the electrolyte are: NaOH 0.125mol / L, Ca(OH) 2 0.0135mol / L, β-Na2GP 0.02mol / L. During the preparation process, a cooling system was used to control the temperature of the micro-arc oxidation electrolyte at 273K. After the prepared samples were washed with alcohol and deionized water, they were placed in a dry box for later use. Obtain the magnesia coating containing phosphorus and calcium, and its surface SEM photos ...

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Abstract

The invention discloses a magnesium-based active coating with the surface having a self-healing function and a preparation method of the magnesium-based active coating. Firstly, a porous magnesium oxide coating containing phosphorus and calcium is prepared on the surface of magnesium or a magnesium alloy through a micro-arc oxidation technology; then, the porous magnesium oxide coating containingthe phosphorus and the calcium is coated with an F-MSNs@PLLA coating in a spin coating manner through a spin coating deposition method; and finally, a DCPD coating with high osseointegration potency is obtained on the surface through a dipping deposition method. The obtained three coatings have the following structure and performance characteristics that the inner layer is the porous magnesium oxide coating containing the phosphorus and the calcium, the middle layer is the PLLA coating containing F-MSNs and having the self-healing function, the surface layer is the nanometer DCPD coating withthe high osseointegration potency, no discontinuous interfaces exist between the coating of the three-layer structure and a substrate, high bonding strength and good biological activity are achieved,the corrosion resistance of the magnesium or the magnesium alloy in body fluid like fluid can be remarkably improved, and good self-healing capacity is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of biomedical materials, and relates to a method for preparing a bioactive coating on the surface of a magnesium-based medical implant. A kind of sealed magnesium oxide (MgO) / loaded fluoride ion (F - ) doped mesoporous SiO 2 Polylactic acid (F-MSNs@PLLA) / dicalcium hydrogen phosphate (DCPD) nanosphere-based degradable bioactive coating with self-healing function. Background technique [0002] In the selection of construction materials for temporary intraosseous implants, magnesium alloys are superior to current clinical practice because of their elastic modulus matching natural bone, good biocompatibility, in vivo degradability, and non-toxic degradation products. Non-degradable materials used, such as: titanium and its alloys, stainless steel, cobalt-chromium-molybdenum alloy, etc. However, magnesium alloys have not yet achieved large-scale clinical application, mainly because they degrade ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30A61L27/04A61L27/30A61L27/32A61L27/34A61L27/50A61L27/54A61L27/58
Inventor 李博秦亮憨勇
Owner 陕西佳诺博奥生物科技有限公司
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