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Preparation process of magnesium-polylactic acid porous magnesium coating

A preparation process, polylactic acid technology, applied in coating, heating inorganic powder coating, medical science, etc., can solve the problems of long production cycle, complex process, easy corrosion, etc., achieve short production cycle, simple preparation process, good The effect of mechanical strength

Active Publication Date: 2018-11-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent document CN104127916A discloses a material for orthopedic instruments, which is composed of medical pure magnesium or magnesium alloy and absorbable polymer, wherein the surface of pure magnesium or magnesium alloy has a porous ceramic layer, and the magnesium or magnesium alloy mainly provides Biocompatibility, using copper ions and gelatin as the substrate, the overall process is more complicated, the production cycle is relatively long, and there are many other elements loaded, the more biological factors need to be considered, the required There are far more problems to be dealt with than simple magnesium is easy to corrode

Method used

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  • Preparation process of magnesium-polylactic acid porous magnesium coating
  • Preparation process of magnesium-polylactic acid porous magnesium coating
  • Preparation process of magnesium-polylactic acid porous magnesium coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (a) The magnesium powder and the polylactic acid powder are respectively subjected to gas atomization granulation treatment to produce magnesium powder and polylactic acid powder with a particle size of 30 μm. The rotating speed of the disc is 180r / s, and the feeding rate is 20ml / min; and the magnesium powder obtained after the gas atomization granulation treatment and the polylactic acid powder are mechanically mixed evenly, and the content of the polylactic acid powder in the mixed powder is 60%.

[0026] It should be noted that the particle size of 30 μm means that the particle size distribution range of the obtained powder is less than or equal to 30 μm, not that all particles have the same particle size and are 30 μm. The following description about the particle size is the same.

[0027] (b) Grinding, cleaning and drying the surface of the magnesium or magnesium alloy substrate to be sprayed, and then blasting and roughening the surface of the magnesium or magnesi...

Embodiment 2

[0044] (a) The magnesium powder and the polylactic acid powder are subjected to gas atomization granulation treatment respectively to produce magnesium powder and polylactic acid powder with a particle size of 40 μm. The rotating speed of the disc is 190r / s, and the feeding rate is 25ml / min; and the magnesium powder obtained after the gas atomization granulation process and the polylactic acid powder are mechanically mixed evenly, and the content of the polylactic acid powder in the mixed powder is 70%.

[0045] (b) Grinding, cleaning and drying the surface of the magnesium or magnesium alloy substrate to be sprayed, and then performing sandblasting roughening treatment on the surface of the magnesium or magnesium alloy substrate with a particle size of 40 mesh quartz sand.

[0046] (c) Spray the mixed powder onto the surface of the magnesium or magnesium alloy substrate roughened by sandblasting by using the cold spray method, wherein the process parameters of the cold spray m...

Embodiment 3

[0053] (a) The magnesium powder and the polylactic acid powder are subjected to gas atomization granulation treatment respectively to produce magnesium powder and polylactic acid powder with a particle size of 50 μm. The rotating speed of the disc is 200r / s, and the feeding rate is 30ml / min; and the magnesium powder and polylactic acid powder obtained after gas atomization granulation are mechanically mixed evenly, and the content of polylactic acid powder in the mixed powder is 80%.

[0054] (b) Grinding, cleaning and drying the surface of the magnesium or magnesium alloy substrate to be sprayed, and then performing sandblasting roughening treatment on the surface of the magnesium or magnesium alloy substrate with a particle size of 35 mesh quartz sand.

[0055] (c) Spray the mixed powder onto the surface of the magnesium or magnesium alloy substrate roughened by sandblasting by using the cold spray method, wherein the process parameters of the cold spray method are: both the ...

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Abstract

The invention discloses a preparation technology of a magnesium-polylactic acid porous magnesium coating. The preparation technology comprises the following steps that 1) the magnesium powder and polylactic acid powder with given ratios are uniformly mixed, so that mixed powder with the particle size of 30-60 microns is obtained, and the content of polylactic acid powder in the mixed powder is 60-90 wt%; 2) the coarsening treatment is carried out on the surface of magnesium or magnesium alloy matrix to be sprayed to obtain a matrix treatment piece; 3) the mixed powder is sprayed to the to-be-sprayed surface of the matrix treatment piece by adopting a cold spraying method; and 4) sintering is carried out on the coating obtained by spraying. According to the preparation technology, the process is simple, and the production period is relatively short.

Description

technical field [0001] The invention relates to a preparation process of a magnesium-polylactic acid porous magnesium coating, in particular to a process for preparing a magnesium-polylactic acid porous magnesium coating on the surface of magnesium and magnesium alloys. Background technique [0002] The materials currently used for bone tissue repair and replacement mainly include metals and alloys, bioceramics, polymers, composite materials, and bone-derived products of humans and animals. In view of the complex biomechanical requirements of the bone and joint system, the biomaterials used must have sufficient mechanical strength and be firmly combined with the host bone in addition to having the biosafety of other materials such as non-toxic side effects. In this context, magnesium and its alloys have been more and more widely used clinically because of their elastic modulus and density similar to that of bone, good biocompatibility, and high specific strength. Especially...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08A61L27/58A61L27/56A61L27/34A61L27/30A61L27/04
CPCA61L27/047A61L27/306A61L27/34A61L27/56A61L27/58C23C24/085A61L2420/02A61L2430/06A61L2430/02A61L2420/06C08L67/04
Inventor 吴戍戌王守仁刘文涛王立虎薛传艺颜新宇付坤张晓东
Owner UNIV OF JINAN