Abstract
Flame deposition was used to grow high quality carbon nanofibers (CNFs) on the hydroxyapatite (HA) using methanol as carbon source. The HA was activated with Fe-compound by a dip coating. These CNFs were purified by acid leaching. The as-produced and purified CNFs were characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy (TEM), atomic force microscopy, and Raman spectroscopy. Sizes of the CNFs were found to be 0.05 to 5 μm in diameter and more than 40 μm in length. The agglomeration of Fe-catalyst, which decides the diameter of the CNFs, was controlled by the catalyst coating time as well as sintering temperature of HA. Fibrous structure of CNF was confirmed by TEM. This CNF can be used as reinforcing element for improving the mechanical properties in high strength nanocomposites due to its straight and unidirectional morphology. It can also be an excellent candidate for drug vehicles as indicated by the swelling test.
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