Method of conducting in-situ growth of hydrotalcite-like membrane on surface of magnesium alloy on basis of electric field regulation and control and hydrotalcite-like membrane

A technology of electric field regulation and in-situ growth, which is applied in electrolytic inorganic material coating, medical science, prosthesis, etc., can solve the problems of expensive and complicated preparation process, and achieve the effect of simple processing process and easy preparation process

Active Publication Date: 2018-10-09
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are few studies on the preparation and biocompatibility of the superhydrophobic surface of biomedical magnesium alloys, and the commonly used low surface energy substances are biotoxic fluorin

Method used

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  • Method of conducting in-situ growth of hydrotalcite-like membrane on surface of magnesium alloy on basis of electric field regulation and control and hydrotalcite-like membrane
  • Method of conducting in-situ growth of hydrotalcite-like membrane on surface of magnesium alloy on basis of electric field regulation and control and hydrotalcite-like membrane
  • Method of conducting in-situ growth of hydrotalcite-like membrane on surface of magnesium alloy on basis of electric field regulation and control and hydrotalcite-like membrane

Examples

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Example Embodiment

[0035] Example 1

[0036] A method for controlling the superhydrophobic hydrotalcite-like membrane structure on the surface of a magnesium alloy by an electric field and the hydrotalcite-like membrane.

[0037] (1) Surface pretreatment of biological magnesium alloy to remove the oxide layer and other impurities on the surface of biological magnesium alloy: After rough grinding the magnesium alloy sample on a metallographic pre-grinding machine, it is then polished step by step with W20 and W10 sandpaper. Put the ground magnesium alloy sample into the alcohol solution and ultrasonic for 5 minutes, then ultrasonically clean it in deionized water for 5 minutes;

[0038] (2) In-situ growth of hydrotalcite-like film on the surface of biological magnesium alloy: First, the pretreated magnesium alloy substrate is used as the working electrode, and the platinum electrode is used as the counter electrode. They are connected to the anode and cathode terminals of the pulse power supply, and soa...

Example Embodiment

[0040] Example 2

[0041] Same as Example 1, the difference is: in step (2), the working electrode and the counter electrode are immersed in solution B, the temperature of solution B is 80 ℃, the pulse power is turned on, and the power is turned off after 6 hours of operation, the working electrode is taken out and cleaned. Dry; In step (3), the biological magnesium alloy with hydrotalcite-like membrane is placed in 50 ℃, the solute molar concentration is 0.04M lauric acid ethanol solution, the pulse power is turned on, the forward and reverse current values ​​are 0.05A, soak 20min.

Example Embodiment

[0042] Example 3

[0043] Same as Example 1, the difference is: in step (2), the working electrode and the counter motor are immersed in solution A, and solution A is Mn(NO 3 ) 2 Saturated carbonic acid solution, the temperature of solution A is 60℃; the working electrode and counter electrode are immersed in solution B, solution B is Mn(NO) with a molar concentration of 0.05M and a pH of 10 3 ) 2 Sodium carbonate solution, turn on the pulse power supply, turn off the power after running for 4h, take out the sample and wash and blow dry; in step (3), the biomagnesium alloy with hydrotalcite-like membrane is placed at 50℃ and the solute molar concentration is 0.04M laurel In the acid ethanol solution, switch on the pulse power supply, the forward and reverse current values ​​are 0.05A, soak for 30 minutes.

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Abstract

The invention provides a method of conducting in-situ growth of a hydrotalcite-like membrane on the surface of magnesium alloy on the basis of electric field regulation and control and the hydrotalcite-like membrane. The method comprises the following steps that (1) the surface of magnesium alloy is preprocessed; (2) an Mg(OH)2/Mg-Mn composite hydrotalcite-like membrane grows in an in-situ mode ina saturated carbonic acid solution of manganese ion salt by using a preprocessed magnesium alloy substrate as a working electrode and using a platinum electrode as a counter electrode under the action of a pulsed electric field; and (3) magnesium alloy prepared in the step (2) and equipped with the hydrotalcite-like membrane is put in a 0.04mol/L laurate ethanol solution and soaked in the switch-on state of a pulsed power source, acid group ion exchange is conducted, and therefore a super-hydrophobic hydrotalcite-like membrane layer with a petal-shaped cluster structure is obtained on the surface of magnesium alloy. By means of the directional nucleation effect of the pulsed electric field, an alternating electric field regulates and controls the solution micro-region ion concentration, and therefore controllable preparation of the hydrotalcite-like membrane structure is achieved. The method is simple in technology, the hydrophobicity of the hydrotalcite-like membrane is remarkably improved, and the method can be widely applied to the bio-medical fields such as the body implantation field.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a method for in-situ growth of a hydrotalcite-like film on the surface of a magnesium alloy based on electric field control and the hydrotalcite-like film. Background technique [0002] As a degradable metal material, biomagnesium alloy has the advantages of high specific strength and specific stiffness, density and elastic modulus close to natural bone, and has broad application prospects in the field of biological implants such as bone plates, bone nails and vascular stents. . However, the corrosion resistance of bio-magnesium alloys is poor. Serious corrosion has occurred before the body has healed as an implant material, which affects the mechanical properties and stability of the material, and can lead to inflammatory reactions in the body. Therefore, for biomedical magnesium alloys, it is a current research hotspot to develop new corrosion-resistant and non-...

Claims

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Application Information

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IPC IPC(8): C25D9/04C25D5/18A61L27/30A61L27/50
CPCA61L27/306A61L27/50C25D5/18C25D9/04
Inventor 巴志新匡娟李壮壮郏永强董强胜王章忠
Owner NANJING INST OF TECH
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