An improved understanding of the dispersion of multi-walled carbon nanotubes in non-aqueous solvents

Li, Quanxiang, Church, Jeffrey S., Kafi, Abdullah, Naebe, Minoo and Fox, Bronwyn L. 2014, An improved understanding of the dispersion of multi-walled carbon nanotubes in non-aqueous solvents, Journal of nanoparticle research, vol. 16, no. 7, Article Number : 2513, pp. 1-12, doi: 10.1007/s11051-014-2513-0.

Attached Files
Name Description MIMEType Size Downloads

Title An improved understanding of the dispersion of multi-walled carbon nanotubes in non-aqueous solvents
Author(s) Li, Quanxiang
Church, Jeffrey S.
Kafi, Abdullah
Naebe, MinooORCID iD for Naebe, Minoo orcid.org/0000-0002-0607-6327
Fox, Bronwyn L.
Journal name Journal of nanoparticle research
Volume number 16
Issue number 7
Season Article Number : 2513
Start page 1
End page 12
Total pages 12
Publisher Springer
Place of publication Berlin, Germany
Publication date 2014
ISSN 1388-0764
1572-896X
Keyword(s) Centrifugation
Multi-walled CNTs
Non-aqueous dispersion
Surfactant assisted
Ultrasonication
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
AQUEOUS DISPERSIONS
RAMAN-SPECTROSCOPY
ABSORPTION-SPECTROSCOPY
IONIC LIQUIDS
SURFACTANTS
YARNS
DNA
FUNCTIONALIZATION
COMPOSITES
SEPARATION
Summary The homogeneous and stable dispersion of carbon nanotubes (CNTs) in solvents is often a prerequisite for their use in advanced materials. Dispersion procedures, reagent concentration as well as the interactions among reagent, defective CNTs and near-perfect CNTs will affect the resulting CNT dispersion properties. This study, for the first time, presents a detailed comparison between two different approaches for dispersing CNTs. The results enhance our understanding of the interactions between surfactant, defective CNTs and near-perfect CNTs and thus provide insight into the mechanism of CNT dispersion. Dispersions of "as-produced" short multi-walled carbon nanotubes (MWCNTs) in N,N-dimethylformamide were prepared by two different surfactant (Triton X-100) assisted methods: ultrasonication and ultrasonication followed by centrifugation, decanting the supernatant and redispersing the precipitate. Visual observation and UV-visible spectroscopy results showed that the latter method produce a more stable dispersion with higher MWCNT content compared to dispersions produced by ultrasonication alone. Transmission electron microscopy and Raman spectroscopic investigations revealed that the centrifugation/ decanting step removed highly defective nanotubes, amorphous carbon and excess surfactant from the readily re-dispersible near-perfect CNT precipitate. This is contrary to other published findings where the dispersed MWCNTs were found in the supernatant. Thermogravimetric analysis showed that 95 % of Triton X-100 was removed by centrifugation/decanting step, and the remainder of the Triton X-100 molecules is likely randomly adsorbed onto the MWCNT surface. Infrared spectral analysis suggests that the methylene groups of the polyoxyethylene (aliphatic ether) chains of the residual Triton X-100 molecules are interacting with the MWCNTs. © 2014 Springer Science+Business Media.
Language eng
DOI 10.1007/s11051-014-2513-0
Field of Research 100708 Nanomaterials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070472

Document type: Journal Article
Collection: Institute for Frontier Materials
Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 11 times in TR Web of Science
Scopus Citation Count Cited 17 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 306 Abstract Views, 4 File Downloads  -  Detailed Statistics
Created: Tue, 10 Mar 2015, 13:49:32 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.