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Surface modification method of magnesium alloy

A surface modification and magnesium alloy technology, which is applied in metal material coating process, bulk chemical production, coating, etc., can solve the problems of magnesium alloy corrosion, achieve low preparation cost, improve corrosion resistance and cell response The effect of sex and simple process

Inactive Publication Date: 2015-06-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for surface modification of magnesium alloys, which solves the difficult problem of easy corrosion of magnesium alloys in the layer-by-layer self-assembly technology commonly used in surface modification technology

Method used

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  • Surface modification method of magnesium alloy
  • Surface modification method of magnesium alloy
  • Surface modification method of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for modifying the surface of a magnesium alloy, the specific steps are as follows:

[0026] (1) Substrate pretreatment

[0027] Polish the magnesium alloy until the surface is bright, and ultrasonically clean it with acetone to obtain a clean metal surface;

[0028] (2) Layer-by-layer self-assembly

[0029] Spin-coat the 1-ethyl-3-methylimidazole ethyl sulfate salt solution with a concentration of 5 mg / mL polyethyleneimine and sodium polystyrene sulfonate on the magnesium alloy surface after step (1) pretreatment in turn, spin The coating speed is 1500rpm, the spin coating time is 15s, wash with ultrapure water for 1 minute after each spin coating, spin coating two solutions as a layer-by-layer self-assembly cycle, a total of 25 cycles, and then blow dry with nitrogen; The concentration of 1-ethyl-3-methylimidazole ethyl sulfate salt solution was 5 mg / mL.

Embodiment 2

[0031] A method for modifying the surface of a magnesium alloy, the specific steps are as follows:

[0032] (1) Substrate pretreatment

[0033] Polish the magnesium alloy until the surface is bright, and ultrasonically clean it with acetone to obtain a clean metal surface;

[0034] (2) Layer-by-layer self-assembly

[0035] Spin-coat the 1-ethyl-3-methylimidazole ethyl sulfate salt solution with a concentration of 1 mg / mL polyethyleneimine and sodium polystyrene sulfonate on the surface of the magnesium alloy pretreated in step (1) in turn, spin The coating speed is 300rpm, and the spin coating time is 8s. After each spin coating, it is washed with ultrapure water for 1 minute. After spin coating the two solutions as a layer-by-layer self-assembly cycle, a total of 10 cycles, and then blow dry with nitrogen; The concentration of 1-ethyl-3-methylimidazole ethyl sulfate salt solution was 5 mg / mL.

Embodiment 3

[0037] A method for modifying the surface of a magnesium alloy, the specific steps are as follows:

[0038] (1) Substrate pretreatment

[0039] Polish the magnesium alloy until the surface is bright, and ultrasonically clean it with acetone to obtain a clean metal surface;

[0040] (2) Layer-by-layer self-assembly

[0041] Spin-coat the 1-ethyl-3-methylimidazole ethyl sulfate salt solution with a concentration of 10 mg / mL polyethyleneimine and sodium polystyrene sulfonate on the magnesium alloy surface after step (1) pretreatment in turn, spin The coating speed is 4000rpm, and the spin coating time is 50s. After each spin coating, wash with ultrapure water for 1 minute. After spinning the two solutions as a layer-by-layer self-assembly cycle, a total of 100 cycles, and then blow dry with nitrogen; The concentration of 1-ethyl-3-methylimidazole ethyl sulfate salt solution was 5 mg / mL.

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Abstract

The invention discloses a surface modification method of a magnesium alloy. The method carries out magnesium alloy surface coating via layer-by-layer self-assembly; the coating is formed by repeatedly superposing polyethylene imine-sodium polystyrenesulfonate; and polyethylene imine and sodium polystyrenesulfonate are prepared into solutions by taking ionic liquid as a solvent and then spincoated on the surface of the magnesium alloy. According to the method, the functional coating is prepared on the surface of the magnesium alloy by taking the ionic liquid as the solvent; the corrosion resistance and cell responsivity of a magnesium alloy material are improved; the method overcomes the disadvantage that the traditional layer-by-layer self-assembly technology taking water as the water is difficultly applied to corrosive materials such as the magnesium alloy, has the advantages of simple technology, not need for special equipment and low preparation cost and establishes a foundation for taking the magnesium alloy as a biomedical material.

Description

technical field [0001] The invention belongs to the field of medical metal materials, and in particular relates to a method for modifying the surface of a magnesium alloy. Background technique [0002] As a new generation of biodegradable medical metal materials, magnesium alloy materials have received extensive attention in recent years. Magnesium alloy materials have excellent comprehensive mechanical properties and unique biodegradability, and are easy to process and shape. The density of magnesium alloy materials is the closest to that of human bones, and its elastic modulus is also close to that of human bones. In addition, magnesium is one of the macro metal elements necessary for the human body. The magnesium ions released after the degradation of the magnesium alloy can promote the proliferation and differentiation of bone cells. However, the corrosion rate of the magnesium alloy material is too fast, and it is difficult to meet the shape and mechanical requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00C09D179/02C09D125/18C09D5/08C09D7/00
CPCY02P20/54
Inventor 刘鹏赵永春
Owner CHONGQING UNIV
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