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Influence of the hydrocarbon chain length of imidazolium-based ionic liquid on the dispersion and stabilization of double-walled carbon nanotubes in water

Raiah, Kenza and Djalab, Abdelkader and Hadj-Ziane-Zafour, Amel and Soula, Brigitte and Galibert, Anne-Marie and Flahaut, Emmanuel Influence of the hydrocarbon chain length of imidazolium-based ionic liquid on the dispersion and stabilization of double-walled carbon nanotubes in water. (2015) Colloids and Surfaces A: Physicochemical and Engineering Aspects, 469. 107-116. ISSN 0927-7757

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Official URL: http://dx.doi.org/10.1016/j.colsurfa.2015.01.015

Abstract

Imidazolium-based ionic liquids with a long hydrocarbon chain 1-methyl-1-ethanol-2-alkyl-imidazolium iodide ([M-E-Cn-Im] I, n = 13, 15 and 17) were used for the dispersion of DWCNTs in water.DWCNTs suspensions obtained were stable for more than a month, and no sedimentation was observed.The stability of the suspensions was investigated (measurement of optical density, zeta potential, parti-cle size, viscosity, and TEM images). Monitoring of the absorbance by UV/vis spectrophotometry for 20days showed that at low concentration (1 mM), the best suspension was obtained with the ionic liquid([M-E-C15-Im] I). At higher concentration (10 mM), the dispersion efficiency increased with the length ofthe hydrocarbon chain. This could be explained by the hydrophobic interaction between the hydrophobicmoieties of the ionic liquid and the CNTs. Therefore, we were able to stabilize DWCNTs using a low con-centration (1 mM) of imidazolium-based ionic liquids synthesized from natural compounds. This workhighlights the potential of imidazolium-based ionic liquids for the preparation of aqueous suspensionsof DWCNTs at high concentration with a limited amount of added surfactant (50 mg/L of DWCNTs with50 mg/L of ionic liquid).

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com
HAL Id:hal-01475298
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Saâd Dahlab Blida - USDB (ALGERIA)
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Deposited By: cirimat webmestre
Deposited On:23 Feb 2017 14:47

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