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Continuous carbon fiber reinforced composite material for bone repair

A technology for reinforcing composite materials and composite materials, which is applied in the field of high carbon fiber reinforced molecular materials, can solve problems such as insufficient strength, achieve good fatigue resistance, low cost, and improve wettability.

Inactive Publication Date: 2004-11-24
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved in the present invention is to provide a continuous carbon fiber reinforced composite material for bone repair for fracture fixation that can meet medical requirements, is easy to process and has sufficient mechanical strength, so as to overcome the limitations of existing metal materials. Existing defects and the above-mentioned technologies disclosed by its patents have defects such as material mechanical properties that are quite different from those of human bones, and the strength is not large enough.

Method used

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  • Continuous carbon fiber reinforced composite material for bone repair

Examples

Experimental program
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Effect test

preparation example Construction

[0028] see figure 1 , the pultrusion preparation method of composite material comprises the following steps:

[0029] The fiber bundles are drawn from the creel (1) under the traction of the tractor (8), impregnated through the impregnation chamber (2), and the impregnated fibers enter the first pre-polymerization section (3) of the polymerization curing chamber. The temperature of this section is Controlled at 60-100°C, the pre-polymerized material enters the second section of heat treatment section (4), the temperature of this section is controlled at 110-140°C, so as to completely polymerize the unpolymerized monomers, and then pass through the shaping mold (5), The temperature of the mold is controlled at 160-220° C., then cooled by the cooling section (6), and then pelletized by the pelletizer (7) as required.

Embodiment 1

[0031] In a water bath at 90°C, 0.045 parts of azobisisobutyronitrile was added to 40 parts of methyl methacrylate to polymerize to obtain a prepolymer of methyl methacrylate. Add 0.3 parts of diisopropyl peroxydicarbonate and 0.015 parts of azobisisobutyronitrile to the prepolymer. The polymerization temperature is 90°C, the heat treatment temperature is 140°C, and the temperature of the shaping die is 200°C. 60 parts of continuous carbon fiber reinforced polymethyl methacrylate composites were obtained by pultrusion. According to the requirements of the product, the fixed bracket or bone plate and intramedullary nail are processed by machine tool. The specific toxicological test results are shown in Table 1. The mechanical properties are shown in Tables 2 and 3.

[0032] Table 1 Toxicological tests of continuous carbon fiber reinforced composites for bone repair

[0033] Test items

technical standard

Test Results

Cytotoxicity test...

Embodiment 2

[0037] Stack ten layers of carbon fiber cloth in a fixed mold, add methyl methacrylate prepolymer, the prepolymer is to add 0.1 part of azo to 40 parts of methyl methacrylate and 20 parts of butyl methacrylate Diisobutyronitrile is pre-polymerized at 80°C. Vacuum for about 20 minutes to remove air bubbles, then place the mold in a water bath at 50°C for 3 days of polymerization, then treat it at 80°C for 3 hours, then treat it at 120°C for 2 hours, cool and demould, and obtain 40 parts of carbon fiber cloth reinforced polyacrylic acid The base methyl acrylate composite material is hot-pressed into a cranial repair material through a mold.

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Abstract

The continuous carbon fiber reinforced composite material for bone repair is prepared with continuous carbon fiber, continuous carbon fiber felt or continuous carbon fiber, cloth through soaking in methyl methacrylate monomer or pre-polymer and subsequent extruding or bulk molding. The composite material of the present invention includes methyl methacrylate and carbon fiber, and the carbon fiber content is 20-80 wt%. The composite material may be used as the external fracture fixing material, internal fracture fixing material and bone repairing material. The composite material has the features of light weight, no interference on NMR examination and excellent biocompatibility. It may be implanted inside life body without negative effect on tissue, blood, etc.

Description

technical field [0001] The invention relates to a material for bone repair, in particular to a molecular material with high carbon fiber reinforcement. technical background [0002] With the development of society and economy and the aging of the population, there are more and more orthopedic trauma patients, and the demand and requirements for bone repair materials continue to increase and improve. The materials used in traditional fracture internal fixators and external fixation brackets are mainly medical metals, which usually have the following disadvantages: (1) metal materials are rigid and have low elasticity, which can produce stress protection on the fracture end, thereby hindering fracture healing; (2) metal materials Excessive mass hinders the patient's activities and physical recovery exercise; (3) metal interferes with MRI; (4) electrochemical corrosion may occur in the body; (5) the cost is relatively expensive. [0003] Polymer absorbable internal fixation bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/16A61L27/34C08J5/24C08L33/08
Inventor 解廷秀杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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