Highly Dispersible Buckled Nanospring Carbon Nanotubes for Polymer Nano Composites

Title
Highly Dispersible Buckled Nanospring Carbon Nanotubes for Polymer Nano Composites
Authors
최원국황도경이영택유태희김정혁이윤재함소라김성룡Angadi Dasavaraj서원선주병권
Keywords
Nanospring CNTs; Highly dispersible; polymer composite; ZnO template; dielctric constant; PVDF-TrFE
Issue Date
2018-03
Publisher
Scientific Reports
Citation
VOL 8-4859
Abstract
We propose the unique structure of highly dispersible single-walled carbon nanotubes (SWCNTs) in various solvents and polymers using the ZnO nano particle template. Buckled nanospring-shaped carbon nanotubes (NS-CNTs) were synthesized by a chemical reaction of ZnO nanoparticles with acid-treated SWCNTs and then dissolving ZnO through chemical etching. The unique structure of distorted hexagonal NS-CNTs encircled around ZnO nanoparticles was formed by the bending of SWCNTs caused by the agglomeration of chemically adsorbed Zn(OH)2, which is further crystallized as the polycrystalline ZnO inner core. The highly dispersible NS-CNTs could be incorporated in the poly[(vinylidenefluoride-co-trifluoroethylene] [P(VDF-TrFE)] copolymer, one of widely studied ferroand piezo-electric polymer, up to the value of 15 wt% as nanofillers. The relative dielectric constant (K) of polymer nanocomposite, at 1 kHz, was greatly enhanced from 12.7 to the value of 62.5 at 11 wt% of NS-CNTs, corresponding to a 492% increase compared to that of pristine P(VDF-TrFE) with only a small dielectric loss tangent (D) of 0.1.
URI
http://pubs.kist.re.kr/handle/201004/67431
ISSN
2045-2322
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