am5074694_si_002.avi (1.31 MB)
Extruded Superparamagnetic Saloplastic Polyelectrolyte Nanocomposites
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posted on 2015-01-14, 00:00 authored by Jingcheng Fu, Qifeng Wang, Joseph B. SchlenoffIron
oxide nanoparticles of diameter ca. 12 nm were dispersed
into polyelectrolyte complexes made from poly(styrenesulfonate) and
poly(diallyldimethylammonium). These nanocomposites were plasticized
with salt water and extruded into dense, tough fibers. Magnetometry
of these composites showed they retained the superparamagnetic properties
of their constituent nanoparticles with saturation magnetization that
scaled with the loading of nanoparticles. Their superparamagnetic
response allowed the composites to be heated remotely by radiofrequency
fields. While the modulus of fibers was unaffected by the presence
of nanoparticles the toughness and tensile strength increased significantly.