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Superparamagnetic flexible substrates based on submicron electrospun Estane® fibers containing MnZnFe[BOND]Ni nanoparticles

Authors

  • Pankaj Gupta,

    1. Department of Chemical Engineering (0211), Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
    Current affiliation:
    1. The Dow Chemical Company, Plastics Materials Science, Freeport, TX 77541
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  • Ramazan Asmatulu,

    1. Fiber and Electro Optics Research Center (0356), Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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  • Rick Claus,

    1. Fiber and Electro Optics Research Center (0356), Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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  • Garth Wilkes

    Corresponding author
    1. Department of Chemical Engineering (0211), Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
    • Department of Chemical Engineering (0211), Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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Abstract

Flexible, elastomeric, and superparamagnetic substrates were prepared by electrospinning a solution of elastomeric polyurethane containing ferrite nanoparticles (∼14 nm) of Mn[BOND]Zn[BOND]Ni. The flexible mats were characterized in terms of fiber morphology and magnetic properties. Field emission scanning electron microscopy (FESEM) indicated that the diameter of these composite fibers was ∼300–500 nm. Furthermore, the back-scattered electron FESEM images indicated agglomeration of the nanoparticles at higher wt % (ca. 17–26 wt %) loading in the electrospun fibers. The induced specific magnetic saturation and the relative permeability were found to increase linearly with increasing wt % loading of the ferrite nanoparticles on the submicron electrospun fibers. A specific magnetic saturation of 1.7–6.3 emu/g at ambient conditions indicated superparamagnetic behavior of these composite electrospun substrates. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 4935–4942, 2006

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