J. Iran. Chem. Soc., Vol. 6, No. 2 June 2009, pp.386~392.

Current location: JICS Archive > Vol. 6 > No. 2 > Articles : 19

Preparation of Hydroxyapatite Nanoparticles: Comparison between Hydrothermal and Solvo-Treatment Processes and Colloidal Stability of Produced Nanoparticles in a Dilute Experimental Dental Adhesive

M. Sadat-Shojai*

Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran

The main purpose of this study is to investigate the colloidal stability of hydroxyapatite (HAp) nanoparticles prepared by different methods. Nano-sized hydroxyapatite particles are synthesized by two different methods including hydrothermal and solvo-treatment processes. In hydrothermal process nanoparticles are synthesized at high temperature, while in solvo-treatment method nanoparticles are synthesized at room temperature by the use of surfactants and organic solvent. The samples are characterized by powder X-ray diffraction (XRD), fourier-transformed infrared spectroscopy (FT-IR), scanning electron microscopy coupled with energy dispersive X-ray analysis detector (SEM + EDXA), and phase separation analyzer. The produced nanoparticles are different in size, stoichiometric ratio, morphology, crystallinity and colloidal stability in a dilute dental adhesive. The results show that the nanoparticles synthesized by these two methods are quite dissimilar and particles prepared by hydrothermal method have a smaller size and higher colloidal stability.

Keywords: Hydroxyapatite, Hydrothermal, Solvo-treatment, Colloidal stability, Dental adhesives

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