ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this study, biomemitic hydroxyapatite was prepared as a nano-sized powder from calciumnitrate tetrahydrate and diammonium hydrogen phosphate salts, but using the different contents of PVPmodified hydroxyapatite and synthetic body fluid (SBF) solutions as synthesis medium instead of purewater at 37.4C and pH of 7.4. SBF was prepared in accord with the chemical analysis of human bodyfluid, with ion concentrations nearly equal to those of the inorganic constituents of human blood plasma.Characterization and chemical analaysis of the synthesized biomemitic hydroxyapatite powders and purehydroxyapatite were investigated by X-ray powder diffraction, scanning electron microscopy, andinductively coupled plasma atomic emission spectroscopy. Rheological properties of HAP sol whichreflected the interaction of hydroxyapatite particles were measured by R/S rheometer. The results showedthat PVP evidently affected the stability and rheological properties of HAP sol, and PVP were based onthe different mechanism at different concentrations. PVP was operating as an interparticle bridgingreagent at low concentrations(0.5%), while it acted as an dispersant at high concentrations(2.0%). Thebiomemitic hydroxyapatite with the sizes of 10~30nm was spherical and poor crystalline, which wassynthesized in synthetic body fluid (SBF) by addition of 2.0% PVP
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1169.pdf
