In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 368-372 ( 2008-2), p. 1169-1171
Kurzfassung:
In this study, biomemitic hydroxyapatite was prepared as a nano-sized powder from calcium
nitrate tetrahydrate and diammonium hydrogen phosphate salts, but using the different contents of PVP modified hydroxyapatite and synthetic body fluid (SBF) solutions as synthesis medium instead of pure
water at 37.4C and pH of 7.4. SBF was prepared in accord with the chemical analysis of human body fluid, 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 pure hydroxyapatite were investigated by X-ray powder diffraction, scanning electron microscopy, and
inductively coupled plasma atomic emission spectroscopy. Rheological properties of HAP sol which reflected the interaction of hydroxyapatite particles were measured by R/S rheometer. The results showed
that PVP evidently affected the stability and rheological properties of HAP sol, and PVP were based on the different mechanism at different concentrations. PVP was operating as an interparticle bridging
reagent at low concentrations(0.5%), while it acted as an dispersant at high concentrations(2.0%). The biomemitic hydroxyapatite with the sizes of 10~30nm was spherical and poor crystalline, which was
synthesized in synthetic body fluid (SBF) by addition of 2.0% PVP.
Materialart:
Online-Ressource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.368-372
DOI:
10.4028/www.scientific.net/KEM.368-372.1169
Sprache:
Unbekannt
Verlag:
Trans Tech Publications, Ltd.
Publikationsdatum:
2008
ZDB Id:
2073306-9
