Double-walled carbon nanotube dispersion via surfactant substitution Auteur(s): Datsyuk Vitaliy, Landois P., Fitremann Juliette, Peigney Alain, Galibert Anne marie, Soula Brigitte, Flahaut Emmanuel (Article) Publié: Journal Of Materials Chemistry, vol. 19 p.2729-2736 (2009) Ref HAL: hal-01339359_v1 Exporter : BibTex | endNote Résumé: A new approach for the stabilisation of double-walled carbon nanotubes in aqueous media was developed. A low molecular weight surfactant was used in the first stage for the debundling of the nanotubes followed by substitution with a higher molecular weight surfactant or non-ionic surfactants. Dispersions were characterized by optical density measurements, SEM and DLS. The presence of remaining low molecular weight surfactant was investigated by FT-IR. Double walled carbon nanotube dispersions showed good dispersion stability and non-detectable amounts of the initial surfactant, which was completely removed. Such a method could be useful for preparation of stable aqueous dispersions of carbon nanotubes with low concentration of surfactants, which is especially important for toxicity studies. |