(253d) Jamming in Carbon Nanotube Suspensions
AIChE Annual Meeting
2005
2005 Annual Meeting
Engineering Sciences and Fundamentals
Colloidal Hydrodynamics
Tuesday, November 1, 2005 - 4:00pm to 4:15pm
We measure the anisotropy of sheared carbon nanotube suspensions over a broad range of concentration, aspect ratio, and strain rate using a variety of methods. In the semi-dilute regime, our measurements highlight the importance of hydrodynamic excluded-volume interactions with scaling in terms of a dimensionless shear rate, or Peclet number. In more concentrated suspensions, we find that the tubes form an elastic network in quiescence with behavior reminiscent of `jamming' below a critical shear stress. Above this threshold yield stress, we observe a variety of flow-induced structure as a function of confinement, concentration, strain rate and temperature.