Preparation method of calcium phosphate-coated magnesium powder

A technology of calcium hydrogen phosphate package and magnesium powder, which is applied in transportation and packaging, liquid chemical plating, metal processing equipment, etc., can solve the problems of fast degradation of magnesium and magnesium alloys, structural failure, implantation failure, etc., and achieve structural Small and uniform, performance-enhancing, and easy-to-operate effects

Active Publication Date: 2017-10-10
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the rapid degradation of magnesium and magnesium alloys in vivo, it often causes structural failure, wound inflammation, etc., resulting in implant failure.
Calcium phosphate is a bioceramic with good biocompatibility, osteoconduction and osteoinductance, and its composition is similar to natural bone tissue, but it is brittle and difficult to form

Method used

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  • Preparation method of calcium phosphate-coated magnesium powder
  • Preparation method of calcium phosphate-coated magnesium powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare 0.01mol / L Ca(NO 3 ) 2 and KH 2 PO 4 100ml each solution, in Ca(NO 3 ) 2 Add 2 g complexing agent C to the solution 10 h 14 N 2 Na 2 o 8 • 2H 2 0, after it is fully dissolved, under the stirring of a magnetic stirrer (400 r / min), the KH 2 PO 4 Slowly add Ca(NO 3 ) 2 solution until uniformly mixed, and finally adjust the pH value to 3.6 with 1mol / L sodium hydroxide solution, and adjust the solution temperature to 10°C. Weigh 2 g of magnesium powder and slowly add it to the above solution, use a stirring speed of 400r / min to disperse the powder evenly in the solution, then reduce the stirring speed to 200r / min, the reaction ends after 30min, take out the powder and carry out centrifugal drying Drying in a drying oven to prepare magnesium powder coated with calcium hydrogen phosphate dihydrate.

Embodiment 2

[0028] Prepare 0.01mol / L Ca(NO 3 ) 2 and KH 2 PO 4 100ml each solution, in Ca(NO 3 ) 2 Add 2g complexing agent C to the solution 10 h 14 N 2 Na 2 o 8 • 2H 2 0. After it is fully dissolved, stir the KH with a magnetic stirrer (300 r / min). 2 PO 4 Slowly add Ca(NO 3 ) 2 solution until uniformly mixed, and finally adjust the pH value to 4.2 with 1mol / L sodium hydroxide solution, and adjust the solution temperature to 15°C. Weigh 2 g of magnesium powder and slowly add it to the above solution. Use a stirring speed of 300 r / min to disperse the powder evenly in the solution, then reduce the stirring speed to 200 r / min. After 25 minutes, the reaction is over, and the powder is taken out for centrifugal drying. Finally, it is dried in an oven to obtain magnesium powder coated with calcium hydrogen phosphate dihydrate.

Embodiment 3

[0030] Prepare 0.01mol / L Ca(NO 3 ) 2 and KH 2 PO 4 100ml each solution, in Ca(NO 3 ) 2 Add 2g complexing agent C to the solution 10 h 14 N 2 Na 2 o 8 • 2H 2 O, after it is fully dissolved, under the magnetic stirrer (250 r / min), the KH 2 PO 4 Slowly add Ca(NO 3 ) 2 solution until uniformly mixed, and finally adjust the pH value to 4.8 with 1 mol / L sodium hydroxide solution, and adjust the solution temperature to 20°C. Weigh 2 g of magnesium powder and slowly add it to the above solution, and use a stirring speed of 250 r / min to disperse the powder evenly in the solution and cause a deposition reaction. After 20 minutes, the reaction ends, and the powder is taken out for centrifugal drying and placed in a drying oven. Drying in medium to obtain calcium hydrogen phosphate dihydrate coated magnesium powder powder.

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Abstract

The invention relates to a preparation method of calcium phosphate-coated magnesium powder. According to the method, a deposition solution prepared from calcium nitrate, monopotassium phosphate and disodium ethylene diamine tetraacetic acid in a certain ratio is used, and gas-atomized pure magnesium powder is used for a deposition reaction under the deposition conditions that the pH value ranges from 3.6 to 4.8, the deposition temperature ranges from 10 DEG C to 20 DEG C and the stirring speed ranges from 200 rpm to 400 rpm. With the preparation method, a complete and uniform coating layer is prepared on the surface of the pure magnesium powder, the main phase of the coating layer is dicalcium phosphate dihydrate and a small amount of magnesium hydrogen phosphate, and the corrosion resistance of the magnesium powder in a chlorine-containing environment can be improved.

Description

technical field [0001] The invention relates to a method for preparing coated composite powder materials, in particular to a method for preparing calcium hydrogen phosphate dihydrate coated composite magnesium powder by using a chemical liquid phase deposition method. Background technique [0002] With the development of modern society, the pace of human life is accelerating, the life span of human beings is prolonging, accidents such as traffic accidents, natural disasters and various accidental injuries occur frequently, and people's requirements for quality of life and living standards are increasing day by day. It is the stagnation of human organ donation that has led to an increasing number of organ and tissue replacements, resulting in a sharp rise in people's demand for medical bio-transplant materials, bio-substitute materials, and bio-filling materials. [0003] Magnesium, as an essential constant element in the human body, not only has the function of self-degradat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16B22F1/02
CPCC23C18/1637B22F1/145
Inventor 王勇谢帅乔丽英李旭
Owner CHONGQING UNIV
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