Effect of Phosphate Precursor on the Production of Hydroxyapatite from Crocodile Eggshells

Abstract:

The hydrothermal reaction at 250°C between crocodile eggshells and three phosphate precursors, (NH4)2HPO4, Ca3(PO4)2 and H3PO4 were studied. Only (NH4)2HPO4 and Ca3(PO4)2 precursors gave monophasic hydroxyapatite within 25 and 8 h, respectively. Pure hydroxyapatite could not be produced when using H3PO4. The characteristic vibration for PO43- are observed at 566-603, 1043-1093, 962-963 and 466-474 cm-1 and for OH- group at 3570-3572 and 633-634 cm-1. The morphology of the prepared hydroxyapatite is agglomerated plate-like crystals. The Ca/P ratio by ICP method is 1.62-1.64.

• Periodical: Journal of Biomimetics, Biomaterials and Tissue Engineering (Volume 5)
• Pages: 31-37
• DOI: https://doi.org/10.4028/www.scientific.net/JBBTE.5.31
• Online since: February 2010
• Authors: U. Boonyang, P. Chaopanich, Atchana Wongchaisuwat, Payoon Senthongkaew, S. Siripaisarnpipat
• Keywords: Calcite, Calcium Carbonate, Hydroxyapatite (HAP), X-Ray Diffraction (XRD)

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