Mechanism of carbon nanotube dispersion and precipitation during treatment with poly(acrylic acid)

N H Tran; A S Milev; M A Wilson; John R Bartlett; G S K Kannangara

doi:10.1002/sia.2889

Back

Mechanism of carbon nanotube dispersion and precipitation during treatment with poly(acrylic acid)

Journal article

Peer reviewed

Mechanism of carbon nanotube dispersion and precipitation during treatment with poly(acrylic acid)

N H Tran, A S Milev, M A Wilson, John R Bartlett and G S K Kannangara

Surface and Interface Analysis, Vol.40(9), pp.1294-1298

2008

DOI: https://doi.org/10.1002/sia.2889

Files and links (1)

url

https://doi.org/10.1002/sia.2889View

Published Version

Abstract

Carbon nanotubes have been shown to be easily dispersed within an acidic aqueous solution of poly(acrylic acid) but precipitate when the pH is increased. Transmission electron microscopy showed that the nanotubes were more exfoliated under the acidic condition but highly aggregated under the basic condition. Carbon K-edge NEXAFS spectroscopy showed that the carbon nanotubes did not chemically react with poly(acrylic acid) during the dispersion or precipitation and that the dispersion mainly involved physical adsorption of poly(acrylic acid) onto the nanotubes. Together with the carbon K-edge NEXAFS spectra, the cobalt L3,2-edge NEXAFS spectra suggested that under the basic condition, the cobalt impurity within the nanotubes strongly reacted with poly(acrylic acid) resulting in complex formation. Cobalt reduces the adsorption of poly(acrylic acid) onto the nanotubes, which then reduced the nanotube dispersion and resulted in the precipitation.

Details

Title: Mechanism of carbon nanotube dispersion and precipitation during treatment with poly(acrylic acid)
Authors: N H Tran (Author) - University of Western Sydney
A S Milev (Author) - University of Western Sydney
M A Wilson (Author) - University of Western Sydney
John R Bartlett (Author) - University of Western Sydney
G S K Kannangara (Author) - University of Western Sydney
Publication details: Surface and Interface Analysis, Vol.40(9), pp.1294-1298
Publisher: John Wiley & Sons Ltd.
Date published: 2008
DOI: 10.1002/sia.2889
ISSN: 0142-2421
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99448863302621
Output Type: Journal article

Metrics

5 File views/ downloads

782 Record Views

11 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration
Web Of Science research areas: Chemistry, Physical