Abstract
The adsorption capacity and release attributes of magnetic Fe3O4@hydroxyapatite (Fe3O4/HAp) nanoparticles for drug molecules can be improved by modified their surfaces
with logical chosen organic groups. The internal surface of nanoparticles was functionalized
with (3-aminopropyl) trimethoxysilane (APTS). Comparative studies of their adsorption
and release properties for various model drug molecules (such as pure hydroxyapatite,
Fe3O4@hydroxyapatite and functionalized Fe3O4@hydroxyapatite) were then conducted. The characteristic of the obtained materials
was performed with X-ray-diffraction (XRD), energy dispersive X-ray microanalysis
(EDS), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy
(SEM), UV-Vis analysis, vibrating sample magnetometer (VSM) and transmission electron
microscopy (TEM). Results show that functionalized magnetic Fe3O4@hydroxyapatite nanoparticles leads than a substantial decrease of the drug delivery
rate in pH=6.8 after investigated drug release in intestine environment. In addition,
the results demonstrate that high adsorption capacity for drug and slower drug release
rate was obtained after functionalized nanoparticles than Fe3O4@hydroxyapatite and pure hydroxyapatite.
Key word
Drug delivery - Ibuprofen - APTS - Hydroxyapatite - Scanning electron microscopy