Process Optimisation to Control the Physico-Chemical Characteristics of Biomimetic Nanoscale Hydroxyapatites Prepared Using Wet Chemical PrecipitationReportar como inadecuado




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School of Clinical Dentistry, University of Sheffield, 19 Claremont Crescent, Sheffield S10 2TA, UK





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Academic Editor: Andrew J. Ruys

Abstract Hydroxyapatite nanoscale particles nHA were prepared by wet chemical precipitation using four different synthesis methods. Differences in physico-chemical properties including morphology, particle-size, and crystallinity were investigated following alteration of critical processing parameters. The nanoparticles were also studied using X-ray diffraction XRD, Fourier Transform infrared spectroscopy in attenuated total reflectance mode FTIR-ATR, and transmission electron microscopy TEM with energy dispersive X-ray EDS spectrometry. The results showed that the particles obtained were composed of nHA, with different morphologies and aspect ratios 1.5 to 4 and degrees of crystallinity 40% to 70% following calcination depending on the different process parameters of the synthesis method used, such as temperature, ripening time and pH. This study demonstrated that relatively small adjustments to processing conditions of different wet chemical preparation methods significantly affect the morphological and chemical characteristics of nHA. For the predicable preparation of biomimetic nHA for specific applications, the selection of both production method and careful control of processing conditions are paramount. View Full-Text

Keywords: bioceramics; hydroxyapatite; nanoparticles; processing; wet-precipitation bioceramics; hydroxyapatite; nanoparticles; processing; wet-precipitation





Autor: Piergiorgio Gentile * , Caroline J. Wilcock, Cheryl A. Miller, Robert Moorehead and Paul V. Hatton

Fuente: http://mdpi.com/



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