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Synthesis and characterization of polystyrene coated iron oxide nanoparticles and asymmetric assemblies by phase inversion
Author(s) -
Xie Yihui,
Sougrat Rachid,
Nunes Suzana P.
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.41368
Subject(s) - materials science , nanoparticle , polystyrene , iron oxide nanoparticles , chemical engineering , scanning electron microscope , dynamic light scattering , transmission electron microscopy , phase inversion , nanocomposite , coprecipitation , fourier transform infrared spectroscopy , magnetic nanoparticles , polymer , polymer chemistry , nanotechnology , membrane , composite material , chemistry , biochemistry , engineering
Films with a gradient concentration of magnetic iron oxide nanoparticles are reported, based on a phase inversion membrane process. Nanoparticles with ∼13 nm diameter were prepared by coprecipitation in aqueous solution and stabilized by oleic acid. They were further functionalized by ATRP leading to grafted polystyrene brush. The final nanoparticles of 33 nm diameter were characterized by TGA, FTIR spectroscopy, GPC, transmission electron microscopy, and dynanmic light scattering. Asymmetric porous nanoparticle assemblies were then prepared by solution casting and immersion in water. The nanocomposite film production with functionalized nanoparticles is fast and technically scalable. The morphologies of films were characterized by scanning electron microscopy and atomic force microscopy, demonstrating the presence of sponge‐like structures and finger‐like cavities when 50 and 13 wt % casting solutions were, respectively, used. The magnetic properties were evaluated using vibrating sample magnetometer. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41368.