2009/07/18 by Yali Ji, Y. Ji, Y. Y. Huang +8
Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Porphyrin and Phthalocyanine Chemistry #Soft Condensed Matter (cond-mat.soft) #Synthesis and properties of polymers #cond-mat.mtrl-sci #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.0907.3175
to appear in: Langmuir 2009
arxiv created 2009/07/18 · openalex publication_date 2009/07/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We develop two new amphiphilic molecules that are shown to act as efficient surfactants for carbon nanotubes in non-polar organic solvents. The active conjugated groups, which are highly attracted to 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 crosslinked elastomer), both surfactant molecules were made with long siloxane tails to facilitate solubility and steric stabilization. We show that pyrene-siloxane surfactant is very effective in dispersing multi-wall nanotubes, while the porphyrin-siloxane is making single-wall nanotubes soluble, both in petroleum ether and in siloxane matrix.