Antisolvent precipitation of hydrophobic functionalized multiwall carbon nanotubes in an aqueous environment

Document Type

Article

Publication Date

2-15-2012

Abstract

The possibility of antisolvent precipitation of hydrophobic, organic soluble functionalized carbon nanotubes (f-CNTs), where water acts as an antisolvent is presented. Octadecylamine functionalized multiwall carbon nanotubes (MWCNT-ODA) was used as the model compound and was found to form highly stable dispersions in different water/solvent systems, and the particle sizes ranged from 170 to 400. nm. Colloidal behavior was studied using dynamic light scattering and particle aggregation was found to increase with the addition of electrolytes, with tetrahydrofuran (THF) and ethanol showing the maximum effect. The aggregation behavior of the antisolvent precipitated system did not follow the conventional Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, which was different from what has been reported previously for hydrophilic, water soluble f-CNTs. Based on this study, it is evident that hydrophobic f-CNTs are potential water pollutants. © 2011 Elsevier Inc.

Identifier

84855836680 (Scopus)

Publication Title

Journal of Colloid and Interface Science

External Full Text Location

https://doi.org/10.1016/j.jcis.2011.11.019

e-ISSN

10957103

ISSN

00219797

PubMed ID

22142999

First Page

115

Last Page

120

Issue

1

Volume

368

Grant

RC2ES018810

Fund Ref

National Institute of Environmental Health Sciences

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