Dispersability and particle size distribution of CNTs in an aqueous surfactant dispersion as a function of ultrasonic treatment time

The dispersability of carbon nanotubes (CNTs) was assessed by studying the sedimentation of CNTs dispersed in aqueous surfactant solutions at different ultrasonication treatment times using a LUMiSizer® apparatus under centrifugal forces. Different commercially available multiwalled CNTs, namely Baytubes® C150P, Nanocyl™ NC7000, Arkema Graphistrength® C100, and FutureCarbon CNT-MW showing quite different kinetics were compared. In addition, the particle size distributions were analyzed using dynamic light scattering and centrifugal separation analysis. The best dispersabilities were found for Nanocyl™ NC7000 and FutureCarbon CNT-MW; to prepare stable dispersions of Baytubes® C150P or Graphistrength® C100 five times the energy was needed. As a result of the centrifugal separation analysis, it was concluded that Nanocyl™ NC7000 and Baytubes® C150P were dispersed as single nanotubes using ultrasonic treatment whereas small agglomerates or bundles are existing in dispersions containing FutureCarbon CNT-MW and Graphistrength® C100. © 2010 Elsevier Ltd. All rights reserved.

Keywords

Agglomeration, Carbon nanotubes, Centrifugation, Size distribution, Size separation, Surface active agents, Ultrasonic equipment, Ultrasonics

URI

https://oa.tib.eu/renate/handle/123456789/12478
https://doi.org/10.34657/11508

Citation

Krause, B., Mende, M., Pötschke, P., & Petzold, G. (2010). Dispersability and particle size distribution of CNTs in an aqueous surfactant dispersion as a function of ultrasonic treatment time. 48(10). https://doi.org/10.1016/j.carbon.2010.04.002

Collections

Chemie

License

CC BY-NC-ND 4.0 Unported

https://creativecommons.org/licenses/by-nc-nd/4.0/

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