Composite hydroxyapatite/carbon nanotube material and its prepn process

A hydroxyapatite and carbon nanotube technology, applied in the intersection of materials science and biomedicine, can solve problems such as low normal parameters, and achieve the effect of good biocompatibility and good mechanical properties

Inactive Publication Date: 2003-09-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

He used an in-situ synthesis method to synthesize chitosan / hydroxyapatite nanocomposites, but the bending strength of the material can only reach 89±4MPa, and the bending modulus is 3.5±0.1GPa, which are far lower than Normal parameters of human bone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The ratio of the composite material is (wt%): 96.5% of hydroxyapatite powder, 3% of carbon nanotubes, and 0.5% of zirconium oxide.

[0015] First, accurately weigh a certain amount of carbon nanotubes and zirconia according to the proportion, put them into beakers respectively, use absolute ethanol as a dispersant, and ultrasonically disperse them for 2 hours and 1 hour respectively, to obtain carbon nanotubes and zirconia in good dispersion state .

[0016] At the same time, the hydroxyapatite powder is prepared, and Ca(NO 3 ) 2 The concentration is 1.2mol / l, (NH 4 ) 2 HPO 4 The concentration is 0.72mol / l, and the pH value is adjusted to 11-13, (NH 4 ) 2 HPO 4 The solution was dripped in for 1 hour, and kept at 90°C for 3 hours. At this time, the uniformly dispersed carbon nanotubes and zirconia were added to the reactor, and kept stirring to make them evenly mixed. After cooling, age for 18 hours, and vacuum After drying for 20 hours, the composite powder can ...

Embodiment 2

[0020] The ratio of the composite material is (wt%): hydroxyapatite powder 99.9, carbon nanotube 0.1

[0021] First, accurately weigh a certain amount of carbon nanotubes according to the proportion and put them into a beaker, and use absolute ethanol as a dispersant to ultrasonically disperse for 0.5 hours to obtain carbon nanotubes in a good dispersion state.

[0022] At the same time, the hydroxyapatite powder is prepared, and Ca(NO 3 ) 2 The concentration is 1.2mol / l, (NH 4 ) 2 HPO 4 The concentration is 0.72mol / l, and the pH value is adjusted to 11-13, (NH 4 ) 2 HPO 4 Add the solution dropwise for 1 hour, and keep it warm at 90°C for 3 hours. At this time, add the uniformly dispersed carbon nanotubes into the reactor, keep stirring to make them evenly mixed, cool and age for 18 hours, and vacuum dry at 80°C for 20 hours. , the composite powder can be obtained.

[0023] The powder is cold-pressed, isostatically pressed, coated with a specific material, and then sin...

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PUM

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Abstract

The present invention relates to a kind of composite hydroxyapatite/carbon nanotube material and its preparation process. The composite material consists of mainly two components including hydroxyapatite and carbon nanotube. The technological process includes chemical preciptiation to synthesize hydroxyapatite, and compounding directly with carbon nanotube to prepare compoiste hydroxapatite/carbon nanotube material. The composite material possesses excellent mechanical performance and biocompatibility and certain magnetism and wave absorbing performance, so that the composite material may be used in repairing and replacement of body bone and extracorporeal physical treatment of bone diseases, and may have latent application as body's bearing bone, magnetic and wave-absorbing material.

Description

Technical field: [0001] The invention belongs to the intersecting field of material science and biomedicine, and particularly relates to a composite material with hydroxyapatite ceramic material as a matrix and carbon nanotube as a reinforcement and a preparation process thereof. Background technique: [0002] Hydroxyapatite itself has high brittleness and low flexural strength, so it is limited in the application of load-bearing materials, and its functionality is not outstanding. At present, many methods have been used to toughen and strengthen hydroxyapatite ceramics. For example, layered structures, nanoparticles, intermetallic particles, metal particles, whiskers, fibers, etc. The advantage of compounding is to improve the toughness and strength of hydroxyapatite ceramics. However, the introduced second phase often leads to a decrease in biocompatibility and may accelerate the decomposition of hydroxyapatite. In general, hydroxyapatite materials enhanced with biologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/50A61L31/14C04B35/447C04B35/622
Inventor 孙康宁李爱民
Owner SHANDONG UNIV
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