Synthesis and physicochemical properties of calcium hydroxylapatite/multi-walled carbon nanotubes nanocomposites |
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| Authors: | Zh A Ezhova N A Zakharov E M Koval’ V T Kalinnikov |
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| Institution: | 1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia
2. Tananaev Institute of Rare Element and Mineral Chemistry and Technology, Kola Research Center, Russian Academy of Sciences, ul. Fersmana 14, Apatity, Murmansk oblast, 184200, Russia
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| Abstract: | Calcium hydroxylapatite/carbon nanotubes (HA/CNT) composites with various CNT contents have been synthesized by coprecipitation from aqueous solutions in the CaCl2-(NH4)2HPO4-NH3-CNT-H2O system (25°C) under conditions modeling the interaction between HA (Ca10(PO4)6(OH)2), which is an inorganic component of osseous tissue, and multi-walled CNTs. The empirical formula of the composites is Ca10(PO4)6(OH)2 · nCNT · 6H2O, where n = 0.2?C5.0. The synthesis products have been identified by the solubility (Tananaev??s residual concentration) method, pH measurements, chemical analysis, X-ray diffraction, IR spectroscopy, electron spectroscopy for chemical analysis, and scanning and transmission electron microscopy. The effect of the CNT concentration in aqueous solution on the composition of the HA/CNT composites and on the crystallographic and morphological characteristics of HA nanocrystals in HA/CNT has been investigated. |
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