Synthesis of Magnetically Sensitive Nanomaterials with Tunable Properties

摘要

We implemented tree methods for obtaining magnetic nanomaterials using the electrospinning process. Electrospinning of polyvinyl alcohol (PVA) and ferrofluid mixtures produces magnetic nanofibers with fiber diameter dependent on the PVA concentration. Concurrent electrospraying (negative polarity) of ferrofluid and electrospinning (positive polarity) of PVA generated a structure of embeded ferric oxide microparticles into PVA nanofibers. Concurrent electrospraying of ferrofluid and electrospinning of PVA was also used with a linearly oscillating (ground) collector. A spacial dependence of the material properties is obtained in this case. The magnetic materials obtained with the methods employed have properties that could be engineered by controlling the parameters of the deposition process. The new synthesized materials may be useful in designing magnetically controlled filters. They could be used for magnetic sensors, drug delivery media, or energy absorbent media.