Preparation and characterization of nanosized hydroxyapatite particles in AOT inverse microemulsion

Nanosized particles of hydroxyapatite (HAP) were synthesized by reacting Ca (H^sub 2^ PO^sub 4^)^sub 2^· H^sub 2^ 0 solution complex with equimolar Ca(OH)^sub 2^ saturated solution in sodium bis (2-ethylhexyl) sulfosuccinate (AOT)/isooctane water-in-oil microemulsion. The formation of microemulsion...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2004-06, Vol.19 (2), p.24-29
Main Authors: Ren, Wei, Li, Shi-pu, Wang, You-fa, Cao, Xian-ying, Chen, Xiao-ming
Format: Article
Language:English
Subjects:
Atoms & subatomic particles
Crystallization
Hydroxyapatite
Isooctane
Microemulsions
Moisture content
Octanol
Phase diagrams
Photon correlation spectroscopy
Slaked lime
Sulfosuccinates
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Nanosized particles of hydroxyapatite (HAP) were synthesized by reacting Ca (H^sub 2^ PO^sub 4^)^sub 2^· H^sub 2^ 0 solution complex with equimolar Ca(OH)^sub 2^ saturated solution in sodium bis (2-ethylhexyl) sulfosuccinate (AOT)/isooctane water-in-oil microemulsion. The formation of microemulsion strongly depended on water content w (w = [H^sub 2^O]/[AOT] molar ratio) and concentration of surfactant and cosurfactant (1-octanol). By the variety of conductivity with w and the partial ternary phase diagram derived from a series of demarcation points, we set the basic component of microemulsions: [AOT] = 0. 1 M(mol/ dm^sub 3^), [1-octanol] = 0.1 M and w = 3-9. Dynamic light scattering (DLS), UV-visible absorbance, TEM analysis and X-ray diffraction were used to characterize the microemulsion, formation of particles and resulting HAP particles. At low water content (w < 9), the water pool radius of the droplet in the Ca(H^sub 2^ PO^sub 4^)^sub 2^ · H^sub 2^O microemulsion lineally depended on w. The size of final HAP particles was strongly affected by water content w and reactant concentration. With increasing water content w from 3 to 9, the size of HAP particles increased from 10-20 nm to 40-50 nm at reactant concentration [Ca(H^sub 2^ PO^sub 4^) 2 · H^sub 2^ 0] = 12 × 10^sup -3^ mol/ dm^sup 3^. The resulting HAP particles were poorly crystallized and spherical in morphology.[PUBLICATION ABSTRACT]
ISSN:1000-2413
1993-0437
DOI:10.1007/BF03000161