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- DOI: 10.1122/1.1849179
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Investigation of shear-banding structure in wormlike micellar solution by point-wise flow-induced birefringence measurements
Lee, J Y; Fuller, G G; Hudson, N E; Yuan, X F
J. Rheol. (N. Y., NY, U. S.) FIELD Full Journal Title:Journal of Rheology (New York, NY, United States). 2005;49(2):537-550.
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Full-text held externally
- DOI: 10.1122/1.1849179
Abstract
Shear banding occurs in many wormlike surfactant solns. subject to strong shear flow. We study this interesting phenomenon by pointwise flow-induced birefringence (FIB) measurements in a well-known aq. surfactant system, cetylpyridinium chloride/sodium salicylate. The dynamic nature of the local rheo-optical properties, such as birefringence and extinction angle across the gap of a Couette cell, were investigated over a range of shear rates, in particular the stress plateau region where shear stress is nearly independent of shear rate. This is probably the first application of point-wise FIB for the investigation of shear banding. The variation of optical signals along the radial direction of the Couette cell indicates that the fluid becomes inhomogeneous and forms bended structures, with either two bands or three bands across the gap, depending on the applied nominal shear rate. [on SciFinder(R)]
Keyword(s)
Flow (shear; Micelles (cationic; Microstructure (shear-banding structure of wormlike micellar soln.); shear banding structure wormlike micellar soln cetylpyridinium chloride; shear-banding structure of wormlike micellar soln.); shear-banding structure of wormlike micellar soln.)
Bibliographic metadata
- CAN 144:58278 66-2 Surface Chemistry and Colloids Journal 0148-6055 written in English 123-03-5 (Cetylpyridinium chloride) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process) (shear-banding structure of wormlike micellar soln.); 54-21-7 (Sodium salicylate) Role: PEP (Physical, engineering or chemical process), PYP (Physical process), PROC (Process) (shear-banding structure of wormlike micellar soln.)