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Preparation method of gradient carbon fiber/hydroxyapatite (HA) composite material

A technology of hydroxyapatite and composite materials, which is applied in the field of preparation of gradient carbon fiber/hydroxyapatite composite materials, can solve the problem of reducing the osteoinductivity and affinity of HA materials, reducing the content of HA matrix, and reducing the mechanical properties of composite materials, etc. problems, to achieve the effect of improving osteoinductivity and biocompatibility, and improving strength and toughness

Inactive Publication Date: 2014-04-02
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The agglomeration and stress concentration of this carbon fiber will lead to deformation and cracking of the composite material sample during sintering, reducing the mechanical properties of the composite material
In addition, when the carbon fiber content is more, although the mechanical properties of the composite material are improved, the content of the HA matrix is ​​reduced at this time, which reduces the good osteoinductivity and affinity of the HA material, and affects the biological relationship between the implant material and human bone tissue. compatibility

Method used

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  • Preparation method of gradient carbon fiber/hydroxyapatite (HA) composite material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] 1. Composite modification of carbon fiber

[0026] a. Put the carbon fiber in the crucible and put it in a box-type resistance furnace that has been heated to 300 ℃ for 30 minutes, and the carbon fiber that has been pretreated by low-temperature oxidation is ready for use;

[0027] b. Ca(NO 3 ) 2 Alcoholic solution 100 mL, concentration of 4 mol / L P 2 o 5 Alcohol solution 117 mL, to ensure that the Ca / P ratio is 1.67, the P 2 o 5 Alcoholic solution to Ca(NO 3 ) 2 Alcohol solution was added dropwise at 1mL / min, and magnetically stirred for 2 hours. After the reaction, it became a transparent viscous sol;

[0028] c. Soak the previously pretreated carbon fiber in the prepared HA sol for 5 minutes, then take it out and put it in an oven at 80 °C to dry for 1 h, so that the HA sol turns into HA gel. Repeat this process 5 times to make the surface of the carbon fiber Form a layer of HA coating that is well combined with the substrate. The modified carbon fibers w...

example 2

[0036] 1. Composite modification of carbon fiber

[0037] a. Put the carbon fiber in a crucible and put it in a box-type resistance furnace that has been heated to 500 °C for 30 minutes, and the carbon fiber that has been pretreated by low-temperature oxidation is ready for use;

[0038] b. Ca(NO 3 ) 2 Alcoholic solution 100 mL, concentration of 4 mol / L P 2 o 5 Alcohol solution 117 mL, to ensure that the Ca / P ratio is 1.67, the P 2 o 5 Alcoholic solution to Ca(NO 3 ) 2 Alcohol solution was added dropwise at 1mL / min, and magnetically stirred for 2 hours. After the reaction, it became a transparent viscous sol;

[0039] c. Soak the previously pretreated carbon fiber in the prepared HA sol for 5 minutes, then take it out and put it in an oven at 80 °C to dry for 1 h, so that the HA sol turns into HA gel. Repeat this process 5 times to make the surface of the carbon fiber Form a layer of HA coating that is well combined with the substrate. The modified carbon fibers were...

example 3

[0047] 1. Composite modification of carbon fiber

[0048] a. Put the carbon fiber in a crucible and put it in a box-type resistance furnace that has been heated to 400 °C for 30 minutes, and the carbon fiber that has been pretreated by low-temperature oxidation is ready for use;

[0049] b. Ca(NO 3 ) 2 Alcoholic solution 100 mL, concentration of 4 mol / L P 2 o 5 Alcohol solution 117 mL, to ensure that the Ca / P ratio is 1.67, the P 2 o 5 Alcoholic solution to Ca(NO 3 ) 2 Alcohol solution was added dropwise at 1.5mL / min, and magnetically stirred for 2 hours, and it turned into a transparent viscous sol after the reaction;

[0050] c. Soak the previously pretreated carbon fiber in the prepared HA sol for 5 minutes, then take it out and put it in an oven at 80 °C to dry for 1 h, so that the HA sol turns into HA gel. Repeat this process 5 times to make the surface of the carbon fiber Form a layer of HA coating that is well combined with the substrate. The modified carbon...

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Abstract

The invention relates to a preparation method of a gradient carbon fiber / hydroxyapatite (HA) composite material. The method comprises the following steps: performing compound modification on carbon fibers via low-temperature oxidation and a HA membrane layer pulling and drawing method; dispersing nanometer HA powder, an organic monomer acrylamide, a cross-linking agent N, N-methylene bisacrylamide, a dispersant sodium hexametaphosphate, an initiator ammonium persulfate, a catalyst N,N,N',N'-tetramethylethylenediamine and ammonium hydroxide into deionized water so as to prepare modified carbon fiber-HA duplex ceramic slurry; performing centrifugal molding on the duplex ceramic slurry; then taking out a centrifugal barrel and putting the centrifugal barrel into a water bath kettle so as to realize the curing molding of modified carbon fiber-HA gel; demolding a green body and then drying the green body in a drying box; and sintering the green body under the argon atmosphere in a tubular furnace so as to obtain the gradient carbon fiber-HA composite material. The method has the advantages that the content of carbon fibers at the bottom of the composite material is high, so that the strength and the toughness of the composite material can be improved during the load bearing; the content of HA at the top of the composite material is high, so that the osteoinduction and the biocompatibility of the composite material can be improved when the composite material is implanted into a human body; the centrifugal molding technology is adopted, so that the problem of stress concentration caused by the reason that the carbon fibers are likely to agglomerate during the dry pressing is solved, and thus the mechanical property of the composite material is improved.

Description

technical field [0001] The invention is a preparation method of gradient carbon fiber / hydroxyapatite composite material. Background technique [0002] Hydroxyapatite is called HA for short. Its osteoconductivity, biocompatibility and interfacial activity are superior to all kinds of traditional medical titanium alloys, silicone rubber and carbon materials for bone grafting. It can be used to make bone filling materials and artificial tooth roots. , artificial jawbone, artificial nasal cartilage, skin implants, artificial middle ear ventilation tube materials, etc., are very promising biomedical materials, but HA materials have disadvantages such as high brittleness, low flexural strength, and poor mechanical properties. , limiting its scope of application. Carbon fiber (CF) is a kind of inorganic non-metallic material with excellent mechanical properties, no creep, fatigue resistance, small thermal expansion coefficient, high elastic modulus, non-toxic, good biocompatibilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/447C04B35/622
Inventor 李强于景媛石萍穆柏春孟秀娟
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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