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Carbon fiber composite skull repairing patch and preparation method thereof

A composite material and carbon fiber technology, applied in medical science, prosthesis, tissue regeneration, etc., can solve problems affecting diagnosis and rehabilitation, implant loosening or dislocation, uneven stress distribution, etc., to achieve strong designability, The effect of improving binding ability and good mechanical properties

Active Publication Date: 2019-12-24
HUNAN TANKANG BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In comparison, titanium alloys are ideal in terms of rigidity, strength, plasticity, and biocompatibility, but they have certain defects: (1) Poor mechanical compatibility, uneven stress distribution, loosening of implants or Dislocation, local osteoporosis, bone resorption, fracture, delayed bone healing, etc.
(2) The edge is usually sharp and easy to damage the skin, resulting in the exposure of the implant; (3) The thermal conductivity is high, which can cause discomfort to the patient under large temperature differences
(5) There are artifacts in the medical examination, which will affect the later diagnosis and rehabilitation treatment
Carbon materials have good biocompatibility, and they have been applied in many aspects of biomedicine, but there are no relevant reports on the successful design and preparation of cranioplasty materials using carbon materials in the prior art

Method used

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  • Carbon fiber composite skull repairing patch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Carbon fiber prefabricated body

[0038] Three layers of 3k (1k means one thousand) carbon fiber plain weave (area density 200g / m 2 ) and 3 layers of carbon fiber nonwovens (area density 20g / m 2 ) cross lamination, three layers of plain weave are superimposed, the fiber arrangement between the layers is 30°cross, carbon fiber non-woven fabric is arranged between the plain weave, needle punched on the thickness of the lamination, and the riveting point density is 10 points / cm 2 , Relying on mold forming, interlayer carbon fiber is riveted to form a carbon fiber profiling prefabricated body.

[0039] 2) Densification

[0040] The carbon fiber profiling preform obtained in step (1) is passed through methane (nitrogen as a diluent gas with a flow ratio of 1:0.5) at a temperature of 1100 ° C. After cracking, the chemical vapor phase infiltrates in the carbon fiber blank. After 80 hours, Make the required carbon fiber composite material blank.

[0041] 3) High temperat...

Embodiment 2

[0046] 1) Carbon fiber prefabricated body

[0047] 1 layer of 6k carbon fiber twill cloth (area density 320g / m 2 ) and 1 layer of 3k carbon fiber satin cloth (area density 240g / m 2 ) and 2 layers of carbon fiber nonwovens with a thickness of 0.3mm (area density 30g / m 2 ) cross lamination, the fiber arrangement between the twill fabric layer and the satin weave fabric layer is 45°cross, needling on the thickness of the lamination layer, and the riveting point density is 10 points / cm 2 , Relying on mold forming, interlayer carbon fiber is riveted to form a carbon fiber profiling prefabricated body.

[0048] 2) Densification

[0049] The carbon fiber profiling preform obtained in step (1) is vacuum impregnated with coal tar pitch, the impregnation pressure is 3.0 MPa, the impregnation time is 5 hours, the cracking temperature is 800 °C, the pressure is 100 MPa, and the time is 10 hours to make it densified , to get the green body.

[0050] 3) High temperature treatment

[0...

Embodiment 3

[0054] 1) Carbon fiber prefabricated body

[0055] Laminate 3 layers of carbon fiber woven fabric and 2 layers of carbon fiber non-woven fabric, the outer layer is 1k carbon fiber plain weave, the surface density is 140g / m 2 , the central interlayer is 3k carbon fiber twill fabric, the surface density is 220g / m 2 , carbon fiber non-woven fabrics (thickness 0.4mm, surface density 20g / m 2 ), pierced and riveted in the thickness direction, the piercing density is 12 points / cm 2 , the fiber arrangement between the layers is 40°cross, relying on the mold to form, and the layers are riveted to form a carbon fiber profiling prefabricated body.

[0056] 2) Densification

[0057] The carbon fiber profiling prefabricated body obtained in step (1) is first passed through natural gas at a temperature of 1000°C, and after cracking, the chemical vapor phase is infiltrated into the carbon fiber blank. After 40 hours, it is vacuum impregnated with coal tar pitch. The temperature is 2.0MPa...

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Abstract

The invention discloses a carbon fiber composite skull repairing patch and a preparation method thereof. The skull repairing patch is formed by overlapping at least one layer of carbon fiber woven cloth and at least one layer of carbon fiber non-woven cloth. Carbon fibers of the carbon fiber woven fabric and the carbon fiber non-woven fabric are filled with matrix carbon and / or silicon carbide; the skull repairing patch has the characteristics of light weight, good biocompatibility, good chemical stability, mechanical properties similar to those of human bones, good fatigue, strong designability, no artifacts and the like, and is particularly suitable for skull repair.

Description

technical field [0001] The invention relates to a skull patch, in particular to a carbon fiber composite skull patch and a preparation method thereof, belonging to the field of biomedical materials. Background technique [0002] Craniocerebral defects with a diameter greater than 3 cm due to trauma, infection, tumor, surgery, etc. may produce clinical symptoms. In order to keep the cranial cavity closed, restore the patient's shape, and avoid physiological abnormalities, skull repair surgery is required. [0003] The materials used for cranioplasty mainly include autologous bone, artificial polymers, metals and other materials are commonly used materials for cranioplasty. In comparison, titanium alloys are ideal in terms of rigidity, strength, plasticity, and biocompatibility, but they have certain defects: (1) Poor mechanical compatibility, uneven stress distribution, loosening of implants or Dislocation, local osteoporosis, bone resorption, fracture, delayed bone healing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/577C04B35/573C04B35/622C04B35/80A61L27/08A61L27/10A61L27/56A61L27/50
CPCC04B35/83C04B35/571C04B35/573C04B35/622A61L27/08A61L27/10A61L27/56A61L27/50A61L2430/02C04B2235/614C04B2235/616C04B2235/48C04B2235/428C04B2235/5256C04B2235/656C04B2235/6567C04B2235/96
Inventor 谭周建
Owner HUNAN TANKANG BIOTECH CO LTD
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