Single-Walled Carbon Nanotube Dispersions in Poly(ethylene oxide)

Dispersions of single‐walled carbon nanotubes (SWNTs) in poly(ethylene oxide) (PEO) assisted by a lithium‐based anionic surfactant demonstrate an electrical percolation of 0.03 wt.‐% and a geometrical percolation, inferred from melt rheometry, of 0.09 wt.‐%. Both the melting temperature and the exte...

Full description

Saved in:
Bibliographic Details
Published in:Advanced functional materials 2005-11, Vol.15 (11), p.1832-1838
Main Authors: Chatterjee, T., Yurekli, K., Hadjiev, V. G., Krishnamoorti, R.
Format: Article
Language:English
Subjects:
Carbon nanotube composites
Nanocomposites
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Dispersions of single‐walled carbon nanotubes (SWNTs) in poly(ethylene oxide) (PEO) assisted by a lithium‐based anionic surfactant demonstrate an electrical percolation of 0.03 wt.‐% and a geometrical percolation, inferred from melt rheometry, of 0.09 wt.‐%. Both the melting temperature and the extent of crystallinity of the PEO crystals decrease with increasing SWNT loading. Raman spectroscopy of the nanocomposites indicates a down‐shift of the SWNT G‐modes and suggests that the nanotubes are subjected to tensile stress transfer from the polymer at room temperature. Excellent dispersion of single‐walled CNTs in poly(ethylene oxide)—manifested in the sigmoidal dependence of the reduced viscosity (ηr*) and its dramatic increase with increasing CNT content (see Figure)—using a lithium‐based anionic surfactant is reported. Fitting to a percolation model implies a percolation threshold of 0.09 wt.‐% and an effective CNT aspect ratio of ≥650.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.200500290