(711d) Electrospun Magnetic Polymer Nanocomposite Fibers

Magnetic nanoparticles with a size close to the single domain are of tremendous interest in different fields of chemistry and physics due to their unique magnetic properties such as enhanced coercivity, superparamagnetism and chemical catalytic properties inherent with their small size and high specific surface area [1-2]. Therefore, polymer nanocomposites incorporated magnetic nanoparticels have shown promise in various potential applications [3]. As one kind of nanocomposites, one dimensional (1-D) conductive fibers with magnetic properties are of interest for many applications including membranesless biofuel cells [4]. Many synthesis and fabrication methods have already been used to produce 1-D nanofibers, but electrospinning has been demonstrated as the simplest and low cost technique to produce nanocomposite fibers at high speed. Meanwhile, eletrospun magnetic fibers will exhibit remarkable properties due to its large specific surface area, small diameter (50-500nm) and extremely long length [5]. In this talk, electrospun magnetic polymer nanocomposite fibers are introduced. The polymers include polyacrylonitrile (PAN), polystyrene (PS), and polyimide (PI). The nanoparticles will include iron nanoparticles, iron oxide nanoparticles and nickel nanoparticles. Various characterizations are carried out including scanning electron microscopy (SEM), thermogravimetric analysis (TGA), viscometer, transmission electron microscopy (TEM), attenuated total reflection Fourier Transform Infrared (FTIR) spectroscopy, and X-ray diffraction (XRD), respectively. The magnetic properties are carried out in a physical properties measurement system (PPMS) by Quantum Design. The operation parameters to produce uniform nanofibers will be discussed.

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[7] X. Chen, S. Wei, C. Gunesoglu, J. Zhu, L. Sun, A. B. Karki, D. P. Young and Z. Guo; Electrospun Magnetic Fibrillar Polystyrene Nanocomposites Reinforced with Nickel Nanoparticles, Macromolecular Chemistry and Physics, 211(16), 1775-1783 2010