Research Center for Engineering of
                Systems with Complex Fluids
Title: Synthesis and characterization of magnetically controllable nanostructures using different polymers
Published In: AIP Conference Proceedings of the 8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers, Vol. 1311, pp. 20-27
Description: We report a comparative study of hybrid nanostructures prepared by using water based magnetic nanofluids and polymers such as poly(N-isopropylacrylamide) and pyrrole copolymer functionalized with glycyl-leucine. Design of magnetic nanostructures could be achieved using different synthesis procedures that allow either coating or clustering the magnetic nanoparticles from magnetic fluid by the addition of polymer. Physical-chemical characteristics of hybrid magnetic nanostructures were investigated by FTIR, TEM, DLS, rotational viscosimetry and magnetization measurements. Functionalized pyrrole copolymer coated magnetite nanoparticles with mean size around 9 nm have superparamagnetic behavior and saturation magnetization value of 65?emu/Fe3O4. Clusters of magnetite nanoparticles from the water based magnetic nanofluid were encapsulated into polymeric PNIPA spheres having diameters in the range 50–100 nm. The procedure applied allowed to achieve high magnetic loading of polymeric microspheres, having saturation magnetization value of 41 emu/g. Also, the stable suspension in water of thermoresponsive magnetic microgel, as well as the dried samples shows superparamagnetic behavior. It was evidenced that the thermally induced transition from the swollen to collapsed state of magnetic microgels occurs around 30°?C.
ISBN:ISBN: 978-0-7354-0866-1
ISSN:ISSN: 0094-243X (print)
Publication year: 2010
Keywords:nanostructured materials, polymer blends, transmission electron microscopy, magnetisation
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Authors: TURCU Rodica , NAN Alexandrina , CRACIUNESCU Izabella , LEOSTEAN Cristian , MACAVEI Sergiu , TACULESCU Alina , MARINICA (BALAU) Oana , DAIA Camelia , VEKAS Ladislau ,
Type: International Conference Proceedings
Laboratory: Magnetometry Laboratory
Institution: UPT