Decoration of Cellulose Nanowhiskers with Iron Oxide Nanoparticles
semanticscholar(2018)
摘要
Orientation of cellulose nanowhiskers (CNWs) within various
matrices is an effective approach that affords the exploitation of the high
stiffness of CNWs as a reinforcement phase in nanocomposites. One potential
engineering method to achieve orientation is to incorporate magnetic properties
into the CNWs by tethering magnetic nanoparticles onto the surface of these
nanoparticles, followed by their alignment in an externally-applied magnetic
field. In this work we report the successful in-situ tethering of iron oxide
nanoparticles (IONPs) onto CNWs by the thermal decomposition of Fe(CO)5 in
a H2O/DMF suspension. Following this procedure, IONPs consisting of
mixtures of Fe3O4 and Fe2O3 with an
average diameter of 20 nm were attached to the CNWs. The type of iron oxide
species that was generated was determined by selected area electron diffraction
(SAED) and energy dispersive spectroscopy (EDS) and the particle size was
evaluated by transmission electron microscopy (TEM). Raman spectroscopy was
used to characterize the presence and the nature of the molecular interaction between
the IONPs and the CNWs.
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