Preparation of magnetic polystyrene latex via the miniemulsion polymerization technique

Authors

  • I. Csetneki,

    Corresponding author
    1. Hungarian Academy of Sciences-Budapest University of Technology and Economics Laboratory of Soft Matters, Department of Physical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
    • Hungarian Academy of Sciences-Budapest University of Technology and Economics Laboratory of Soft Matters, Department of Physical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
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  • M. Kabai Faix,

    1. Hungarian Academy of Sciences-Budapest University of Technology and Economics Laboratory of Soft Matters, Department of Physical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
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  • A. Szilágyi,

    1. Hungarian Academy of Sciences-Budapest University of Technology and Economics Laboratory of Soft Matters, Department of Physical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
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  • A. L. Kovács,

    1. Department of General Zoology, Eötvös Loránd University, H-1518 Budapest, Hungary
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  • Z. Németh,

    1. Department of Nuclear Chemistry, Eötvös Loránd University, H-1518 Budapest, P. O. Box 32, Hungary
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  • M. Zrinyi

    1. Hungarian Academy of Sciences-Budapest University of Technology and Economics Laboratory of Soft Matters, Department of Physical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
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Abstract

Magnetic iron oxide (magnetite, Fe3O4) nanoparticles were encapsulated with polystyrene to give a stable water-based magnetic polymer latex, using the miniemulsion polymerization technique. The resulting magnetic latexes were characterized with transmission electron microscopy (TEM), dynamic light scattering (DLS), vibrating sample magnetometer measurements (VSM), and 57Fe Mössbauer spectroscopy measurements. TEM revealed that all magnetite nanoparticles were embedded in the polymer spheres, leaving no empty polystyrene particles. The distribution of magnetite particles within the polystyrene spheres was inhomogeneous, showing an uneven polar appearance. The DLS measurements indicated a bimodal size distribution for the particles in the latexes. According to our magnetometry and Mössbauer spectroscopy data, the encapsulated magnetite particles conserve their superparamagnetic feature when they are separated in the polymer matrix. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 4802–4808, 2004

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