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Mechanochemical–hydrothermal synthesis of hydroxyapatite from nonionic surfactant emulsion precursors |
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| Authors: | Chun-Wei Chen Richard E. Riman Kevor S. TenHuisen Kelly Brown |
| Affiliation: | aDepartment of Ceramic and Materials Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, USA bCenter for Biomaterials & Advanced Technologies, Medical Devices Group, a Division of Ethicon, Inc., Rt. 22 W, P.O. Box 151, Somerville, NJ 08876, USA |
| Abstract: | Nanocrystalline hydroxyapatite [HA, Ca10(PO4)6(OH)2] powders were synthesized by the mechanochemical–hydrothermal method using emulsion systems consisting of aqueous phase, petroleum ether (PE) as the oil phase and biodegradable Tomadol 23–6.5 as the nonionic surfactant. (NH4)2HPO4 and Ca(NO3)2 or Ca(OH)2 were used as the phosphorus and calcium sources, respectively. The calcium source and emulsion composition had significant effects on the stoichiometry, crystallinity, thermal stability, particle size and morphology of final products. Disperse HA crystals with a 160 nm length and aspect ratio of ca. 6 were formed in an emulsion system containing 10 wt% PE, 60 wt% water and 30 wt% surfactant. The HA particles had needle morphology with a specific surface area of . With this technique, HA nanopowders with specific surface areas in the range of 72– were produced. |
| Keywords: | A1. Biomaterials A1. Characterization A1. Mechanochemical A2. Hydrothermal B1. Hydroxyapatite |
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