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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

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

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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 fluorine-containing compounds; and the superhydrophobic film layer on the existing magnesium alloy surface In the preparation process, relatively expensive equipment is mostly used, and the preparation process is complicated

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

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0037] (1) Pretreatment of the surface of the biological magnesium alloy to remove the oxide layer and other impurities on the surface of the biological magnesium alloy: After the magnesium alloy sample is roughly ground on the metallographic pre-grinder, it is then polished step by step with W20 and W10 sandpaper, Put the ground magnesium alloy sample into the alcohol solution and ultrasonically clean it for 5 minutes, and 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: firstly, the pretreated magnesium alloy substrate is used as the working electrode, and the platinum electrode is used as the counter electrode, which are respectively connected to the anode and cathode connections of th...

Embodiment 2

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

Embodiment 3

[0043] With embodiment 1, difference is: in the step (2), working electrode and opposite motor are soaked in solution A, and solution A is the Mn(NO of molar concentration 0.05M 3 ) 2 Saturated carbonic acid solution, the temperature of solution A is 60°C; the working electrode and counter electrode are then soaked in solution B, solution B is Mn(NO 3 ) 2 Sodium carbonate solution, turn on the pulse power supply, turn off the power after running for 4 hours, take out the sample and wash and dry; in step (3), the biomagnesium alloy with hydrotalcite-like film is placed in laurel In the acid ethanol solution, turn on the pulse power supply, the forward and reverse current value is 0.05A, soak for 30min.

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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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