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Superparamagnetic flexible substrates based on submicron electrospun Estane® fibers containing MnZnFeNi nanoparticles
Author(s) -
Gupta Pankaj,
Asmatulu Ramazan,
Claus Rick,
Wilkes Garth
Publication year - 2006
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.23757
Subject(s) - materials science , superparamagnetism , electrospinning , elastomer , nanoparticle , scanning electron microscope , composite number , composite material , chemical engineering , saturation (graph theory) , polymer , nanotechnology , magnetic field , magnetization , physics , quantum mechanics , engineering , mathematics , combinatorics
Flexible, elastomeric, and superparamagnetic substrates were prepared by electrospinning a solution of elastomeric polyurethane containing ferrite nanoparticles (∼14 nm) of MnZnNi. 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