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Polysiloxane surfactants for the dispersion of carbon nanotubes in nonpolar organic solvents.

Ji, Y and Huang, YY and Tajbakhsh, AR and Terentjev, EM (2009) Polysiloxane surfactants for the dispersion of carbon nanotubes in nonpolar organic solvents. Langmuir, 25. pp. 12325-12331.

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Abstract

We develop two new amphiphilic molecules that are shown to act as efficient surfactants for carbon nanotubes in nonpolar organic solvents. The active conjugated groups, which are highly attracted to the graphene nanotube surface, are based on pyrene and porphyrin. We show that relatively short (C18) carbon tails are insufficient to provide stabilization. As our ultimate aim is to disperse and stabilize nanotubes in siloxane matrix (polymer and cross-linked elastomer), both surfactant molecules were made with long siloxane tails to facilitate solubility and steric stabilization. We show that the pyrene-siloxane surfactant is very effective in dispersing multiwall nanotubes, while the porphyrin-siloxane makes single-wall nanotubes soluble, both in petroleum ether and in siloxane matrix.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:28
Last Modified: 22 Sep 2014 01:08
DOI: 10.1021/la901622c

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