Method for preparing biomedical alloy HA (hahnium) coating by gelcasting

A gel injection molding, biomedical technology, applied in coating, medical science, tissue regeneration, etc., can solve the problems of inability to prepare coating and metal matrix materials at one time, difficult processing and forming, long time consumption, etc. The effect of improving material utilization, reducing processing cost, and excellent mechanical properties

Active Publication Date: 2018-07-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still some problems in this kind of coating preparation method, such as the inability to prepare materials with coating and metal matrix at one time, the process is complicated and time-consuming, and it is difficult to process and form some components with complex shapes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] A method for preparing titanium alloy HA coating by gel injection molding, the specific steps are as follows:

[0028] Step (1): Use a 3D printer to print out the mold of the bone joint, and then cast the bone joint with silicone mold splitting to make a gel injection mold;

[0029] Step (2): prepare the premixed solution according to the volume fraction percentage, add organic matter and pore-forming agent in the solvent, wherein the solvent is absolute ethanol 95%, organic matter is methyl cellulose (MC) 1.2%, hydroxypropyl methylcellulose Prime (HPMC) 3.75%, pore-forming agent polyethylene glycol is 0.05%, stir until dissolving completely;

[0030] Step (3): weigh 42vol.% of 35nm hydroxyapatite powder, marked as A; weigh 42vol.% of 20nm transition layer powder, marked as B, wherein the transition layer powder contains 50% titanium dioxide, zirconium dioxide 30%, magnesium silicate 20%; weigh 40 μm spherical TC4 powder, marked as C;

[0031] Step (4): Add 57vol.% of...

Embodiment example 2

[0037] A kind of method that gel injection molding prepares magnesium alloy HA coating, concrete steps are as follows:

[0038] Step (1): Use a 3D printer to print out the mold of the ulna, and then cast the ulna with polyurethane to make a gel injection mold;

[0039] Step (2): Prepare the premix solution according to the volume fraction percentage, add organic matter and pore forming agent in the solvent, wherein the solvent is dichloromethane 94%, organic matter is methyl cellulose (MC) 2.34%, hydroxypropyl methylcellulose Prime (HPMC) 3.6%, pore-forming agent polyethylene glycol is 0.06, stirs until dissolving completely;

[0040] Step (3): weigh 50vol.% of 25nm hydroxyapatite powder, marked as A; weigh 50vol.% of 15nm transition layer powder, marked as B, wherein the transition layer powder contains 20% titanium dioxide, zirconium dioxide 20%, magnesium silicate 60%; weigh 40μm spherical AZ91E magnesium alloy powder, marked as C;

[0041]Step (4): Add 49.18vol.% of the ...

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PUM

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Abstract

The invention relates to a method for preparing a biomedical alloy HA (hahnium) coating by gelcasting, and belongs to the field of preparation of biological materials by gelcasting. The method is characterized in that a methyl cellulose gel system is centrifugally cast to prepare hydroxyapatite, a transition layer and a biomedical alloy composite coating material, and the exterior of the biomedical metal material is bonded with a hydroxyapatite coating at high efficiency. The biomedical alloy HA coating prepared by the method has the advantages that the biocompatibility is good, the mechanicalproperty is excellent, the corrosion-resistant property is good, and the specific strength is high; a non-poisonous gel system is adopted, the forming property is good, and the bonding strength is high; the technology is simple, the function of near-net forming is realized, the product with complicated shape can be prepared at one time, the utilization rate of material is improved, and the processing cost is reduced.

Description

technical field [0001] The invention belongs to the field of preparing biomaterials by gel injection molding and provides a method for preparing biomedical alloy HA coating by gel injection molding. Background technique [0002] Hydroxyapatite (HA) has the function of adsorbing proteins, amino acids, lipids and dextran. Implantation experiments in vivo show that the hydroxyapatite coating can form a strong chemical bond with bone and has a very high biocompatibility. After implanting in the human body, calcium and phosphorus will be released from the surface of the material under the action of body fluids. It is absorbed by the body and combined with the original bone to form a firm osseointegration, even if it is accidentally broken, it can heal in the body. Hydroxyapatite is not only osteoconductive, but also osteoinductive. It is a new type of artificial bone replacement material. [0003] However, because hydroxyapatite (HA) can not overcome the weakness of low strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/32A61L27/30A61L27/06A61L27/04B22F1/00B22F3/22B33Y10/00B33Y80/00
CPCA61L27/047A61L27/06A61L27/306A61L27/32B22F3/22B33Y10/00B33Y80/00A61L2430/02A61L2420/02A61L2420/08A61L2420/06B22F1/107
Inventor 杨芳邵艳茹芦博昕张策郭志猛隋延力冯钊红陆天行李沛孙海霞
Owner UNIV OF SCI & TECH BEIJING
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