Preparation and characterization of composite ferrite@SiO2/hydroxyapatite

Reference Presenter Authors
(Institution)
Abstract
02-054 Tarciana Araújo Santos Polyana Polyana, T.A.(Universidade Federal de Campina Grande); Araujo, R.M.(UFCG); Batista, H.d.(Universidade Federal de Campina Grande); Nepomuceno, F.G.(Universidade Federal de Campina Grande); Leite, R.B.(Universidade Federal de Campina Grande); Costa, A.C.(Universidade Federal de Campina Grande); In recent years, nanotechnology has been focused on obtaining materials such as ferrites and hydroxyapatite, which due to their properties arouse the interest of many researchers in biotechnology. In this work, we propose to prepare and characterize hybrid composites based on ferrite associated with tetraethylorthosilicate (TEOS) and the silane agent type 3-aminopropyltrimethoxysilane (APTS) and hydroxyapatite incorporated in polymer additives. Thus, cobalt ferrite (CoFe2O4) was synthesized by combustion reaction and the surface modification was performed with silane agents, and hydroxyapatite (HA) by the precipitation method. Then CoFe2O4 SiO2: HA composite mixed with polymer additives were prepared to provide a cement / hydrogel with characteristics suitable for possibly being used in biotechnological applications. The materials developed were characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR), textural analysis by adsorption of N2 and scanning electron microscopy (SEM). A magnetic system was simulated with a magnet where the cement was guided towards the magnet. It was possible to obtain the CoFe2O4@SiO2: HA composite mixed with polymer additives, thereby obtaining magnetic composite with promising properties and properties for use in bone-screw implants in biomedical applications. The results indicated that ferrite, hydroxyapatite and composites are crystalline and nanometric.
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