1. Open Access Kent State
  2. Discotic Micellar Nematic and Lamellar Phases Under Shear-Flow
Author(s)
Abstract

Small-angle neutron scattering was employed to study the effect of shear flow on the nematic (N) and lamellar (L(alpha)) phases in aqueous solutions of cesium perfluoro-octanoate. Shear rates as high as similar to 4000 s(-1) were used. The N phase was found to align with the director in the direction of the gradient velocity. The L, phase oriented with lamellae parallel to the shear plane. This change in equilibrium orientation is attributed, primarily, to changes in the value of the Ericksen viscosity parameter at. Subtle shear-rate-dependent director reorientations were also observed in the proximity of the N-to-L(alpha) phase transition.
Format
Article
Identifier(s)
10.1209/0295-5075/28/7/006
Publication Date
1994-12-01
Publication Title
Europhysics Letters
Volume
28
Issue
7
First Page
489
Last Page
494
Keywords
Subject
Community
Department of Physics
Comments

Copright 1994 Institute of Physics. Available on publisher's website at http://dx.doi.org/10.1209/0295-5075/28/7/006.
Permalink https://oaks.kent.edu/phypubs/26
Mang, J., Kumar, S., & Hammouda, B. (1994). Discotic Micellar Nematic and Lamellar Phases Under Shear-Flow. Europhysics Letters. https://doi.org/10.1209/0295-5075/28/7/006
Mang, Joseph, Satyendra Kumar, and Boualem Hammouda. 1994. “Discotic Micellar Nematic and Lamellar Phases Under Shear-Flow”. Europhysics Letters. https://doi.org/10.1209/0295-5075/28/7/006.
Mang, J., S. Kumar, and B. Hammouda. Discotic Micellar Nematic and Lamellar Phases Under Shear-Flow. Europhysics Letters, 1 Dec. 1994, doi:10.1209/0295-5075/28/7/006.