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Method for preparing hydroxyapatite film layer on magnesium alloy surface

A technology of hydroxyapatite film and magnesium alloy, which is applied in the coating process and coating of metal materials, can solve the problems of poor mechanical compatibility of bio-bone and achieve good tissue stability, wear resistance and hardness, evenly distributed effect

Inactive Publication Date: 2015-11-18
SHANDONG JIANZHU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for existing metal bone implant materials such as stainless steel and titanium alloy, there is a problem of poor mechanical compatibility with biological bone.

Method used

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Embodiment Construction

[0025] The best embodiment of the present invention is given below: a method for preparing hydroxyapatite film layer on the surface of magnesium alloy, adopting the method of crystal natural growth, generating hydroxyapatite on the surface of medical magnesium alloy substrate by hydrothermal synthesis For the film layer, first prepare a binary polyelectrolyte complex composed of a water-soluble cationic polyelectrolyte and an organic polybasic acid, containing an aqueous solution of 40 mg / ml polybutyrylamide and 24 wt % maleic acid. Calcium nitrate tetrahydrate and calcium dihydrogen phosphate were then added to the above solution and stirred for 45 minutes. Wherein, the concentration of calcium nitrate is 0.14 mol / L, and the molar ratio of calcium / phosphorus (Ca / P) is 1.7. Then pour the reaction solution into a hydrothermal kettle, put the medical magnesium alloy substrate into the hydrothermal kettle, and react at 90° C. for 100 hours, so that the hydroxyapatite film layer a...

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Abstract

The invention discloses a method for preparing a hydroxyapatite film layer on a magnesium alloy surface, and is applicable to surface processing of medical magnesium alloy. Soluble calcium salt and soluble phosphate are adopted for performing surface processing on the medical magnesium alloy to obtain a layer of film with the main content of a hydroxyapatite crystal containing calcium and phosphorus, so that the human body compatibility of the medical magnesium alloy is improved. According to the method, a unit doublet polyelectrolyte complex solution consisting of a water soluble cation polyelectrolyte and and an organic polyatomic acid is prepared, and the solution is prepared from a water solution containing polybutylamide with the concentration of 40 mg / ml and 24wt% of maleic acid. Then calcium nitrate terahydrate and monocalcium phosphate are added into the solution, and the solution is stirred for 45 minutes, wherein the concentration of calcium nitrate is 0.14 mol / L, and the molar ratio of calcium to phosphorus is 1.7. The medical magnesium alloy is added into a hydrothermal kettle and is reacted for 100 hours at a temperature of 90 DEG C, so that the nano-antibacterial hydroxyapatite film layer and the medical magnesium alloy are subjected to full adsorption reaction, and a layer of hydroxyapatite crystal film is formed on the surface of the medical magnesium alloy.

Description

technical field [0001] The invention relates to the field of metal surface treatment, and is especially suitable for the surface treatment of medical magnesium alloys. It is necessary to carry out surface treatment on medical magnesium alloys through soluble calcium salt and soluble phosphate solutions to obtain a layer of hydroxyl groups whose main components are calcium and phosphorus. Apatite crystal film is used to improve the human compatibility of medical magnesium alloys. Background technique [0002] At present, biomedical materials for clinical applications, such as bone implants and heart stents, are mostly made of stainless steel and titanium alloys. Stainless steel and titanium alloys have good biocompatibility, corrosion resistance and mechanical properties, so the use of stainless steel and titanium alloys It is widely used and recognized in the clinical medical field. However, existing metal bone implant materials such as stainless steel and titanium alloy ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00
Inventor 徐淑波张国良任国成
Owner SHANDONG JIANZHU UNIV
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