Carbon fiber composite artificial bone and preparation method thereof

A composite material and composite material layer technology, applied in the field of biomedical materials, can solve the problems of large differences in thermal expansion coefficient, poor mechanical properties, weak connection strength, etc., and achieve good fatigue, increased rigidity, and no artifacts.

Active Publication Date: 2020-02-28
HUNAN TANKANG BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some obvious technical problems in the carbon fiber-reinforced carbon composite bone material designed in the prior art: as disclosed in the Chinese patent (CN108171798A), the chopped carbon fibers are distributed in a uniform or non-uniform manner in the carbon-ceramic composite bone plate. The inside and surface of the structural frame are covered with resin carbon, short carbon fibers, and discontinuous long fibers, with poor mechanical properties
In addition, the carbon fiber-reinforced carbon composite bone material in the prior art has weak connection strength between the surface layer of hydroxyapatite and the matrix, and the direct contact is easy to crack or delaminate due to the large difference in thermal expansion coefficient.

Method used

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  • Carbon fiber composite artificial bone and preparation method thereof
  • Carbon fiber composite artificial bone and preparation method thereof
  • Carbon fiber composite artificial bone and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) First twist 2 bundles of 6k carbon fibers into a carbon fiber rope with a twist of 200 twists / m; then weave 12 twisted carbon fiber ropes into a strip-shaped continuous carbon fiber braid.

[0048] 2) Using needles to make the area density 20g / m 2 The carbon fiber nonwoven fabric is riveted on the continuous carbon fiber braid, and the riveting point density is 10 points / cm 2 , using mold-assisted molding to obtain a U-shaped carbon fiber prefabricated body.

[0049] 3) The carbon fiber prefabricated body is densified by the impregnation-cracking method to obtain a green body; the densification process is: the carbon fiber body is subjected to densification processes such as coal tar pitch vacuum pressure impregnation and cracking; the impregnation pressure is 2.0 MPa, and the impregnation time is 8 hours; the cracking temperature is 800°C, the pressure is 80MPa, and the time is 4 hours.

[0050] 4) Put the green body in 3) into a high-temperature furnace, and heat...

Embodiment 2

[0055] 1) First twist 4 bundles of 1k carbon fibers into a carbon fiber rope with a twist of 300 twists / m; then weave 12 twisted carbon fiber ropes into a strip-shaped continuous fiber braid.

[0056] 2) Using needles to make the area density 30g / m 2 The carbon fiber nonwoven fabric is riveted on both sides of the continuous fiber braid to form a sandwich structure, and the riveting point density is 10 points / cm 2 , using mold-assisted molding to obtain a U-shaped carbon fiber prefabricated body.

[0057] 3) The carbon fiber prefabricated body is densified by chemical vapor infiltration to obtain a green body; the densification process is: at a temperature of 900 ° C, propylene gas (nitrogen is a diluent gas, and the flow ratio of propylene to nitrogen is 1:0.5 ) after cracking, the chemical vapor phase infiltrates in the carbon fiber blank for 60 hours.

[0058] 4) Use plasma spraying to generate hydroxyapatite on the body treated in 3), the hydroxyapatite penetrates into t...

Embodiment 3

[0062] 1) First twist 3 bundles of 12k carbon fibers into a carbon fiber rope with a twist of 300 twists / m; then weave 6 twisted carbon fiber ropes into a strip-shaped continuous fiber braid.

[0063] 2) Using needles to make the area density 30g / m 2 The carbon fiber nonwoven fabric is riveted on the continuous fiber braid, and the riveting point density is 10 points / cm 2 , using mold-assisted molding to obtain a U-shaped carbon fiber prefabricated body.

[0064] 3) The carbon fiber prefabricated body is densified by the impregnation-cracking method to obtain a green body; the densification process is: the carbon fiber body is subjected to densification processes such as coal tar pitch vacuum pressure impregnation and cracking; the impregnation pressure is 3.0 MPa, and the impregnation time is 10 hours ; The cracking temperature is 900° C., the pressure is 80 MPa, and the time is 5 hours.

[0065] 4) Put the green body in 3) into a high-temperature furnace, and heat it to 20...

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Abstract

The invention provides a carbon fiber composite artificial bone and a preparation method thereof. The section of the artificial bone in a direction perpendicular to the length of the artificial bone is in a U shape, continuous carbon fiber woven fabric composite material layers and carbon fiber non-woven fabric composite material layers are stacked to form the artificial bone, and spaces among thecarbon fibers of the continuous carbon fiber woven fabric composite material layers and the carbon fiber non-woven fabric composite material layers are filled with carbon substrates. The carbon fibercomposite artificial bone has the advantages that the composite material is light in weight, good in biocompatibility, chemical stability and fatigue performance and high in designability, the mechanical property of the composite material is similar to that of a human bone, fake shadows are avoided and the like, hydroxylapatite is stably adhered onto gaps in the surface and the surface, so that biological activity of the composite material is improved, bone growth is facilitated, and bone proliferation is induced.

Description

technical field [0001] The invention relates to an artificial bone material, in particular to a carbon fiber reinforced carbon composite material artificial bone and a preparation method thereof, belonging to the field of biomedical materials. Background technique [0002] Traditional artificial bones are mainly made of metal materials, which have many clinical application problems, such as postoperative complications such as osteoporosis, fracture, and rejection caused by stress shielding caused by mismatched mechanical properties, and the ions dissolved by corrosion are toxic. Artifacts are not conducive to postoperative diagnosis, necessary secondary surgery, etc. The non-metallization of osteosynthetic materials has become a development trend, and carbon materials have good biocompatibility. Among them, carbon fiber, pyrolytic carbon, carbon nanotubes and their composites have been applied in many aspects of biomedicine. Carbon fiber composite material is a carbon-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/50A61L27/12A61L27/08
CPCA61L27/50A61L27/12A61L27/08A61L2430/02
Inventor 谭周建
Owner HUNAN TANKANG BIOTECH CO LTD
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