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Synergistic toughening of composite fibres by self-alignment of reduced graphene oxide and carbon nanotubes

Title
Synergistic toughening of composite fibres by self-alignment of reduced graphene oxide and carbon nanotubes
Author
김선정
Keywords
POLYMER NANOCOMPOSITES; MECHANICAL-PROPERTIES; RAMAN-SPECTROSCOPY; SINGLE; GRAPHITE; FILMS; NANOSHEETS
Issue Date
2012-01
Publisher
Nature Publishing Group
Citation
Nature Communications, 2012, 3(8), P.650
Abstract
The extraordinary properties of graphene and carbon nanotubes motivate the development of methods for their use in producing continuous, strong, tough fibres. Previous work has shown that the toughness of the carbon nanotube-reinforced polymer fibres exceeds that of previously known materials. Here we show that further increased toughness results from combining carbon nanotubes and reduced graphene oxide flakes in solution-spun polymer fibres. The gravimetric toughness approaches 1,000 J g(-1), far exceeding spider dragline silk (165 J g(-1)) and Kevlar (78 J g(-1)). This toughness enhancement is consistent with the observed formation of an interconnected network of partially aligned reduced graphene oxide flakes and carbon nanotubes during solution spinning, which act to deflect cracks and allow energy-consuming polymer deformation. Toughness is sensitive to the volume ratio of the reduced graphene oxide flakes to the carbon nanotubes in the spinning solution and the degree of graphene oxidation. The hybrid fibres were sewable and weavable, and could be shaped into high-modulus helical springs.
URI
https://www.nature.com/articles/ncomms1661http://hdl.handle.net/20.500.11754/52616
ISSN
2041-1723
DOI
10.1038/ncomms1661
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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