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Transparent, Conductive, and Printable Composites Consisting of TEMPO-Oxidized Nanocellulose and Carbon Nanotube
journal contribution
posted on 2013-04-08, 00:00 authored by Hirotaka Koga, Tsuguyuki Saito, Takuya Kitaoka, Masaya Nogi, Katsuaki Suganuma, Akira IsogaiUltrastrong, transparent, conductive
and printable nanocomposites
were successfully prepared by mixing single-walled carbon nanotubes
(CNTs) with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized
cellulose nanofibrils (TOCNs) with abundant sodium carboxyl groups
on the crystalline nanocellulose surfaces. The surface-anionic cellulose
nanofibrils had reinforcing and nanodispersing effects on the CNTs
both in water used as the dispersed medium and in the dried composite
film, providing highly conductive and printable nanocomposites with
a small amount of CNTs. TOCNs are therefore expected as an effective
flexible matrix that can be used as an alternative to conventional
polymers for various electrical materials, when nanocomposited with
CNTs and also graphene. Our findings provide a promising route to
realize green and flexible electronics.