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Method for establishing metal-organic framework composite coating on surface of magnesium metal

An organic framework and composite coating technology, applied in the direction of metal material coating process, etc., can solve the problems of poor adhesion of polymer coating film base, accelerated corrosion of magnesium metal, implant failure, etc., to achieve stable coating, The effect of promoting growth and differentiation, and controlling the rate of corrosion

Active Publication Date: 2017-10-20
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnesium metal modified by the polymer coating is used as the implant material. Due to the poor bonding force of the polymer coating film base, the coating often leads to peeling off and the corrosion of the magnesium metal is accelerated, so that the implant fails prematurely.

Method used

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  • Method for establishing metal-organic framework composite coating on surface of magnesium metal
  • Method for establishing metal-organic framework composite coating on surface of magnesium metal
  • Method for establishing metal-organic framework composite coating on surface of magnesium metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for constructing a metal-organic framework composite coating on a magnesium metal surface, the steps of which are:

[0032] A. The magnesium metal sheet is polished and polished with silicon carbide sandpaper, then ultrasonically cleaned with deionized water, absolute ethanol, acetone, and pickling solution, and then vacuum-dried;

[0033] B. Soak the magnesium metal sheet obtained in step A in 2mol / L, 65°C NaOH solution for 14 hours to obtain the magnesium metal sheet activated by alkali;

[0034] C, configuration concentration is the hydroxy ethylidene diphosphoric acid (HEDP) solution of 0.4g / L, then adjusts its pH to 8 with NaOH;

[0035] D, deionized water and absolute ethanol are formulated into a mixed solvent at a volume ratio of 1.0:1, and then ZrOCl 2 ·8H 2 O is dissolved in a mixed solvent to obtain a zirconium ion solution with a concentration of 0.8mmol / L;

[0036] E. Put the alkali-activated magnesium metal sheet obtained in step B into the hyd...

Embodiment 2

[0041] A method for constructing a metal-organic framework composite coating on a magnesium metal surface, the steps of which are:

[0042] A. The magnesium metal sheet is polished and polished with silicon carbide sandpaper, then ultrasonically cleaned with deionized water, absolute ethanol, acetone, and pickling solution, and then vacuum-dried;

[0043] B. Put the magnesium metal sheet obtained in step A into 4mol / L, 55°C NaOH solution and soak for 10h to obtain the magnesium metal sheet after alkali activation;

[0044] C, configuration concentration is the hydroxy ethylidene diphosphoric acid (HEDP) solution of 0.6g / L, then adjusts its pH to 7 with NaOH;

[0045]D, deionized water and absolute ethanol are formulated into a mixed solvent at a volume ratio of 1.2:1, and then ZrOCl 2 ·8H 2 O is dissolved in a mixed solvent to obtain a zirconium ion solution with a concentration of 1.2mmol / L;

[0046] E. Put the alkali-activated magnesium metal sheet obtained in step B into...

Embodiment 3

[0051] A method for constructing a metal-organic framework composite coating on a magnesium metal surface, the steps of which are:

[0052] A. The magnesium metal sheet is polished and polished with silicon carbide sandpaper, then ultrasonically cleaned with deionized water, absolute ethanol, acetone, and pickling solution, and then vacuum-dried;

[0053] B. Soak the magnesium metal sheet obtained in step A for 12 hours in a 3mol / L, 60°C NaOH solution to obtain an alkali-activated magnesium metal sheet;

[0054] C, configuration concentration is the hydroxyethylidene diphosphoric acid (HEDP) solution of 0.5g / L, then adjusts its pH to 7.5 with NaOH;

[0055] D, deionized water and absolute ethanol are formulated into a mixed solvent at a volume ratio of 0.8:1, and then ZrOCl 2 ·8H 2 O is dissolved in a mixed solvent to obtain a zirconium ion solution with a concentration of 1.0mmol / L;

[0056] E. Put the alkali-activated magnesium metal sheet obtained in step B into the hydr...

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Abstract

The invention discloses a method for establishing a metal-organic framework composite coating on the surface of magnesium metal. The method includes the main steps that A, a magnesium metal sheet is ground and polished, then ultrasonic cleaning is conducted and afterwards vacuum drying is performed; B, the magnesium sheet is put into a 2-4mol / L NaOH solution of 55-65 DEG C to be soaked for 10-14h, and accordingly an alkali-activated magnesium metal sheet is obtained; C, an HEDP solution with the concentration being 0.4-0.6g / L is prepared, and then the pH is adjusted to 7-8; D, deionized water and absolute ethyl alcohol are prepared into mixed solvent according to the volume ratio of 0.8-1.2:1, and then zirconium ions are dissolved into the mixed solvent to obtain a zirconium ion solution with the concentration being 0.8-1.2mmol / L; E, the magnesium sheet obtained in the step B is put into the HEDP solution obtained in the step C, and soaking is conducted for 8-12h under the temperature condition of 55-65 DEG C; F, the magnesium sheet is deposited in the zirconium ion solution for 10-30s; G, the magnesium sheet is deposited in the HEDP solution for 3-5min; and H, operation in the steps F and G is repeated for 4-6 times and accordingly the metal-organic framework composite coating can be obtained. The metal-organic framework composite coating prepared through the method is good in coating / substrate binding force, the coating is thin and compact, the corrosion rate of magnesium can be well controlled and the bone compatibility is good.

Description

technical field [0001] The invention relates to a method for constructing a coating on the surface of magnesium metal. Background technique [0002] Magnesium can be degraded by corrosion in the body, and intermediate corrosion products can be absorbed by chloride ion reaction or metabolized into magnesium ions in body fluids or absorbed by macrophages. At the same time, magnesium also has appropriate mechanical strength close to cortical bone, which can solve the problem of poor healing or re-fracture at the fracture site by reducing stress shielding. In addition, and more importantly, magnesium implants have been widely reported to stimulate new bone formation, which in turn is very beneficial for fracture healing. In conclusion, as a new generation of medical metal materials, magnesium metal has attracted more and more attention in the field of orthopedics because of its good biodegradability, as an implant material, it can avoid secondary surgery after completing its fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/73C23C22/78C23C22/68
CPCC23C22/68C23C22/73C23C22/78
Inventor 万国江蒲世民陈美云屈艾张文泰李薇唐欣刘启军黄楠
Owner SOUTHWEST JIAOTONG UNIV
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