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Rheo-optical studies of carbon nanotube suspensions

Publication ,  Journal Article
Fry, D; Langhorst, B; Wang, H; Becker, ML; Bauer, BJ; Grulke, EA; Hobbie, EK
Published in: Journal of Chemical Physics
February 13, 2006

We use a polarization-modulation technique to investigate the optical anisotropy of multi- and single-wall carbon nanotubes suspended in a variety of solvents under simple shear flow. Measurements of birefringence and dichroism are performed as a function of shear rate, tube concentration, and solvent viscosity. At fixed volume fraction, the anisotropy increases with increasing shear stress due to enhanced flow alignment. At fixed shear stress, the anisotropy increases with volume fraction due to rotational excluded-volume interactions. By considering the rotational diffusivity as a function of nanotube length, diameter, concentration, and solvent viscosity, we demonstrate a leading-order scaling relation for the optical anisotropy in terms of rotary Peclet number Pe. At low Pe, our results are in qualitative agreement with the theoretical predictions of Doi and Edwards. At high Pe, our data suggest that the degree of nanotube alignment scales as Pe16. © 2006 American Institute of Physics.

Duke Scholars

Published In

Journal of Chemical Physics

DOI

ISSN

0021-9606

Publication Date

February 13, 2006

Volume

124

Issue

5

Related Subject Headings

  • Chemical Physics
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Fry, D., Langhorst, B., Wang, H., Becker, M. L., Bauer, B. J., Grulke, E. A., & Hobbie, E. K. (2006). Rheo-optical studies of carbon nanotube suspensions. Journal of Chemical Physics, 124(5). https://doi.org/10.1063/1.2159488
Fry, D., B. Langhorst, H. Wang, M. L. Becker, B. J. Bauer, E. A. Grulke, and E. K. Hobbie. “Rheo-optical studies of carbon nanotube suspensions.” Journal of Chemical Physics 124, no. 5 (February 13, 2006). https://doi.org/10.1063/1.2159488.
Fry D, Langhorst B, Wang H, Becker ML, Bauer BJ, Grulke EA, et al. Rheo-optical studies of carbon nanotube suspensions. Journal of Chemical Physics. 2006 Feb 13;124(5).
Fry, D., et al. “Rheo-optical studies of carbon nanotube suspensions.” Journal of Chemical Physics, vol. 124, no. 5, Feb. 2006. Scopus, doi:10.1063/1.2159488.
Fry D, Langhorst B, Wang H, Becker ML, Bauer BJ, Grulke EA, Hobbie EK. Rheo-optical studies of carbon nanotube suspensions. Journal of Chemical Physics. 2006 Feb 13;124(5).

Published In

Journal of Chemical Physics

DOI

ISSN

0021-9606

Publication Date

February 13, 2006

Volume

124

Issue

5

Related Subject Headings

  • Chemical Physics
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences