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Superparamagnetic Flexible Substrates based on Submicron Electrospun Estane Fibers Containing MnZnFe-Ni Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Pankaj Gupta ,
Ramazan Asmatulu ,
Rick Claus  and
Garth Wilkes
Pankaj Gupta
Affiliation:
Department of Chemical Engineering (0211)
Ramazan Asmatulu
Affiliation:
Fiber and Electro Optics Research Center (0356), Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Rick Claus
Affiliation:
Fiber and Electro Optics Research Center (0356), Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Garth Wilkes
Affiliation:
Department of Chemical Engineering (0211)
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Abstract

Flexible field responsive superparamagnetic substrates were prepared by electrospinning a solution of elastomeric polyurethane containing ferrite nanoparticles (ca. 14 nm) of Mn-Zn-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 ca. 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. Additionally, dielectric constant values of the electrospun fibers were measured to be between 2.3 and 5.8.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 877: Symposium S – Magnetic Nanoparticles and Nanowires , 2005 , S5.7
Copyright
Copyright © Materials Research Society 2005

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