Method for preparing carbon nanometer tube/hydroxyapatite complex powder through in-situ vapour deposition reaction

A technology of hydroxyapatite and carbon nanotubes, applied in medical science, prosthesis, surgery, etc., to achieve the effect of high purity, good quality and uniform dispersion

Inactive Publication Date: 2010-06-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the mechanical blending method is mainly used to apply CNTs to HA for toughening and plasticizing, that is, to mechanically mix HA powder and CNTs to obtain CNTs / HA powder and then press it into composite materials. Although this method is simple, it cannot fundamentally solve the problem of CNTs in The dispersion in the HA matrix and the interface contamination and infiltration between HA and HA are the primary problems faced in the development of CNTs / HA composites

Method used

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  • Method for preparing carbon nanometer tube/hydroxyapatite complex powder through in-situ vapour deposition reaction
  • Method for preparing carbon nanometer tube/hydroxyapatite complex powder through in-situ vapour deposition reaction
  • Method for preparing carbon nanometer tube/hydroxyapatite complex powder through in-situ vapour deposition reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 0.056g ferric nitrate nonahydrate and 1.287g HA powder into deionized water to prepare a ferric nitrate nonahydrate solution containing HA at a concentration of 0.05mol / L, and add 0.05mol / L sodium hydroxide solution dropwise to the solution to make the solution pH = 7.0 and precipitated to produce Fe / Ca 10 (PO 4 ) 6 (OH) 2 Fe(OH) with a mass ratio of 0.01:1 3 / Ca 10 (PO 4 ) 6 (OH) 2 Binary colloid; the binary colloid is dehydrated at 250°C under nitrogen atmosphere, and calcined at 450°C to obtain Fe / Ca 10 (PO 4 ) 6 (OH) 2 Catalyst precursor Fe 2 o 3 / Ca 10 (PO 4 ) 6 (OH) 2 ; The obtained Fe / Ca 10 (PO 4 ) 6 (OH) 2 Catalyst precursor Fe 2 o 3 / Ca 10 (PO 4 ) 6 (OH) 2 The powder is spread in a quartz boat, and the quartz boat is placed in the constant temperature zone in the middle of the reaction tube; the air in the tube is vented with nitrogen gas, and then the temperature is raised to 550°C; hydrogen gas is passed into the reactor at 200ml...

Embodiment 2

[0019] The experimental conditions and process of this example are the same as those in Example 1, except that the catalytic cracking reaction time is 2 hours, and the CNTs / HA composite powder is obtained. The yield of CNTs is 0.05%, the average diameter is 13 nm, and the average length is 2.7 μm.

Embodiment 3

[0021] The experimental conditions and process of this example are the same as in Example 1, except that the catalytic cracking reaction temperature is 650°C, and the CNTs / HA composite powder is obtained. The yield of CNTs is 0.06%, the average diameter is 14nm, and the average length is 2.4μm .

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Abstract

The invention discloses a preparation method of carbon nano-tube / hydroxyapatite composite powder, and belongs to the preparation technology of hydroxyapatite composite matrix composite material. The processes of the method are as follows: ferric nitrate and hydroxyapatite powder are taken as raw materials, according to a certain mass ratio, a deposition-sedimentation method is adopted to prepare Fe / HA catalytic agent precursor Fe2O3 / HA, the precursor Fe2O3 / HA is utilized to prepare CNTs / HA composite powder with nitrogen gas and methane as reaction gases and through a chemical gas phase deposition method under a certain temperature. The invention has the advantages that the preparation process is simple, and the catalytic agent adopted is no poisoning to the human body; the quality of the carbon nano-tube in the power body is good, the purity rate is high, and the size is even; the carbon nano-tube is dispersed evenly in the hydroxyapatite power body, and the combination of the carbon nano-tube with the matrix is good; the power body is the ideal raw material to prepare the composite material of the CNTs / HA.

Description

technical field [0001] The invention relates to a preparation method of carbon nanotube / hydroxyapatite composite powder. It belongs to the preparation technology of hydroxyapatite-based composite material. Background technique [0002] Hydroxyapatite (HA) is currently recognized internationally as one of the most bioactive hard tissue implant materials. It is non-toxic, non-carcinogenic and has good biocompatibility. It has been widely used in plastic surgery and cosmetic surgery. , dental, chromatographic purification, nutritional calcium supplementation and other fields, but its poor comprehensive mechanical properties, low bending strength and fracture toughness greatly limit its practical application. In the world, carbon nanotubes (CNTs) have been recognized as a structural material with excellent performance. Its closed hollow tubular structure has good stability, and has extremely small scale and excellent mechanical properties. The modulus is as high as 5TPa, the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/12A61L27/08A61L31/02
Inventor 赵乃勤刘远师春生李海鹏杜希文
Owner TIANJIN UNIV
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