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Biomimetic mineralization method for preparing magnesium alloy-calcium phosphate coating composite material

A calcium-phosphorus coating and composite material technology, applied in the direction of metal material coating process, can solve the problems of residual interface stress, over-burning of sintering energy, brittleness of arc-oxidized ceramic layer, etc., to achieve good biocompatibility, improve Effects of efficiency, good corrosion resistance and biocompatibility

Inactive Publication Date: 2012-11-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plasma spraying method has problems such as residual interfacial stress, uneven coating, and high cost; the micro-arc oxidation process also has unsatisfactory uniformity and compactness of the film layer, and the arc oxidation ceramic layer is brittle, and the energy consumption in the production process is large. , the cooling of the electrolyte is difficult, the follow-up treatment is more troublesome, and there may be excessive concentration of sintering energy resulting in over-burning or matrix ablation, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] After grinding the magnesium alloy substrate, it was acid-etched in a phosphoric acid solution with a volume percentage of 90% at 55°C for 30 seconds, then put into a 100g / L sodium hydroxide solution for neutralization for 30 seconds, then washed in distilled water and dried for later use. . The biomimetic mineralization solution was prepared according to the proportions of the substances in Table 1, the pH value of the solution was adjusted to 5 with dilute hydrochloric acid, and the magnesium alloy substrate that had been acid-etched was placed in the biomimetic solution and placed in a water bath at 37°C , soaking for 7 days (renewing the solution every day), that is, the magnesium alloy-calcium phosphorus coating composite material is obtained.

[0038] The electrochemical corrosion test is carried out on the magnesium alloy-calcium phosphorus coating composite material sample obtained in this example, the corrosion potential of the sample is -1.377V, and the corros...

Embodiment 2

[0042] After the magnesium alloy substrate is polished, it is acid-etched in a phosphoric acid solution with a volume percentage of 90% at 55°C for 30 seconds, then neutralized in a 100g / L sodium hydroxide solution for 30 seconds, then washed in distilled water, and dried for later use. . Configure the biomimetic mineralization solution according to the ratio of the substances in Table 1, adjust the pH value of the solution to 5 with dilute hydrochloric acid, put the magnesium alloy substrate that has been acid-etched into the biomimetic solution, and place it in a water bath at 37 °C , Soaked for 14 days (renew the solution every day), the magnesium alloy-calcium phosphorus coating composite material is obtained.

[0043] Electrochemical corrosion test was carried out on the magnesium alloy-calcium phosphorus coating composite material sample obtained in this embodiment, the corrosion potential of the sample was -1.351V, and the corrosion current was 4.145e -6 A (The corrosi...

Embodiment 3

[0046] After the magnesium alloy substrate is polished, it is acid-etched in a phosphoric acid solution with a volume percentage of 90% at 55°C for 30 seconds, then neutralized in a 100g / L sodium hydroxide solution for 30 seconds, then washed in distilled water, and dried for later use. . Configure the biomimetic mineralization solution according to the ratio of the substances in Table 1, adjust the pH value of the solution to 6 with dilute hydrochloric acid, put the magnesium alloy substrate that has been acid-etched into the biomimetic solution, and place it in a water bath at 37 °C , soaked for 7 days (renewing the solution every day), the magnesium alloy-calcium phosphorus coating composite material is obtained.

[0047] Electrochemical corrosion test was carried out on the magnesium alloy-calcium phosphorus coating composite material sample obtained in this embodiment, the corrosion potential of the sample was -1.360V, and the corrosion current was 1.685e -6 A (The corro...

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Abstract

The invention relates to a biomimetic mineralization method for preparing a magnesium alloy-calcium phosphate coating composite material. The method comprises single preprocessing, acid etching preprocessing, bionic solution configuration, immersing in the bionic solution and the like to obtain the magnesium alloy-calcium phosphate coating composite material. Compared with other magnesium alloy-calcium phosphate coating composite materials, a magnesium alloy base body is firstly subjected to acid etching preprocessing, so that the calcium phosphate coating and the surface of the base body can be combined well; and the calcium-phosphate ratio of the bionic solution is 1.67:1, besides, the content of the calcium and the phosphate is higher than that of ordinary bionic solutions in the prior art, the biomimetic mineralization efficiency can be improved remarkably, and the calcium phosphate products are similar to human bone components and have good biocompatibility and corrosion resistance.

Description

technical field [0001] The invention relates to a biomimetic mineralization method for preparing a magnesium alloy-calcium phosphorus coating composite material. Background technique [0002] Biomaterials are closely related to human health and quality of life. It has become a new growth point for the economic development of various countries. Biometallic materials currently used in clinics mainly include stainless steel, cobalt-chromium alloy and titanium alloy. They have good corrosion resistance, but have poor biocompatibility, and will produce stress shielding effect, which is non-degradable. Temporary implants require Removal through the second operation increases the pain of the patient and the burden of medical expenses. [0003] Magnesium and magnesium alloys (magnesium-based materials) have excellent biocompatibility and mechanical compatibility, and are expected to become degradable metal hard tissue substitute materials, which are new research hotspots in the fi...

Claims

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Application Information

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IPC IPC(8): C23C22/18C23C22/68C23C22/78
Inventor 陆伟陈哲张玉红刘中梅严彪
Owner TONGJI UNIV
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