Debundling of SWCNTs Using a Non-Toxic, Low Carbon Footprint Dispersant.

ABSTRACT: A fully aqueous, N-methyl-2-pyrrolidone-free strategy for debundling single-walled carbon nanotubes (SWCNTs) is reported using the renewable dispersant Vanisperse^® LI. Dispersions at 2 mg mL^-1 were subjected to probe ultrasonication at 0.3 W mL^-1 and evaluated using oscillatory rheology. Complex viscosity (η*) exhibited a transient maximum (~75 min) consistent with the formation of a percolated fibrous network, followed by a decline as debundling progressed. An optimum dispersant coverage of ~1.5 mg m^-2 minimized η*, while overdosing likely induced multilayer adsorption and bridging seen by a rapid increase in η*. A two-stage centrifugation at 10,000× g yielded storage-stable suspensions of debundled SWCNTs without ultracentrifugation. SEM

SUBMITTER: Salas-Bringas C 

PROVIDER: S-EPMC12656564 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature