Synthesis of Magnetically Sensitive Nanomaterials with Tunable Properties

A. Ieta, J. Patus, J. Apenowic, C. Marius
State University of New York at Oswego, US

Keywords: electrospraying, electrospinning, polyvinyl alcohol, ferric oxide, ferrofluid, nanofibers, microparticles


New magnetic nanomaterials with tunable properties were produced using three procedures. (1) Mixtures of polyvinyl alcohol (PVA) solutions and ferric oxide [3] based ferrofluid were prepared and also electrospun with the purpose of synthesizing magnetic nanofibers. (2) Concurrent electrospraying of ferrofluid and electrospinning with fixed collector. The electrospinning and electrospraying nozzles were set perpendicular to each other and 6 cm away from the grounded collector plate. The positive high voltage (+20kV) was attached to the electrospinning needle and negative high voltage (-6 kV) was applied to the electrospraying needle. (3) Concurrent electrospraying of ferrofluid and electrospinning of PVA with a linearly oscillating grounded collector. Many collector types were used for electrospinning but no linear oscillating collector was found in the literature. The linearly oscillating collector gives the possibility of designing materials with structure not achievable with the usually employed rotating cylinder or disk collectors. In the case of concurrent electrospraying and electrospining, the resulting micrometer size ferric oxide particles are attached to the texture of the PVA nanofiber network. The materials may be useful in designing magnetically controlled filters, magnetic sensors, drug delivery media, or energy absorbent media.