A rheo-optical study of shear rate and optical anisotropy in wormlike micelles solutions.

The flow behaviour of wormlike micelles solutions composed of the surfactant cetylpyridinium chloride (CPCl) and counter-ion sodium salicylate (NaSal) at a molar ratio [CPCl]/[NaSal] = 2 in brine [NaCl] = 0.5 M in a cylindrical Couette geometry was examined using homodyne PCS and ellipsometry. Homodyne PCS was used to profile local shear rate and ellipsometry to concurrently profile local optical anisotropy of the fluid. Shear thinning was observed and was correlated to an increase in turbidity and a breakdown in the stress-optic law. A stress plateau observed in mechanical measurements was correlated with the partitioning of the fluid into regions of low shear rate/low turbidity/high birefringence and high shear rate/high turbidity/low birefringence. The partitioning observed was inconsistent with a simple interpretation of the lever rule.

[1]  M. Cates,et al.  Rheology of giant micelles , 2006, cond-mat/0702047.

[2]  S. Manneville,et al.  Local velocity measurements in heterogeneous and time-dependent flows of a micellar solution. , 2006, Physical review. E, Statistical, nonlinear, and soft matter physics.

[3]  M. Shirakashi,et al.  Shear-induced structure change and flow-instability in start-up Couette flow of aqueous, wormlike micelle solution , 2006 .

[4]  B. M. Marín-Santibáñez,et al.  Rheometry-PIV of shear-thickening wormlike micelles. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[5]  E. Windhab,et al.  Stress driven shear bands and the effect of confinement on their structures--a rheological, flow visualization, and Rheo-SALS study. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[6]  Gerald G. Fuller,et al.  Investigation of shear-banding structure in wormlike micellar solution by point-wise flow-induced birefringence measurements , 2005 .

[7]  N. Mori,et al.  Flow Property and Micellar Structures in Capillary Flows of Surfactant Solutions , 2005 .

[8]  P. Callaghan,et al.  Shear banding fluctuations and nematic order in wormlike micelles. , 2004, Physical review letters.

[9]  P. Olmsted,et al.  Birefringence banding in a micellar solution or the complexity of heterogeneous flows. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[10]  N. Wagner,et al.  Shear-induced phase separation in solutions of wormlike micelles. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[11]  P. Callaghan,et al.  Shear-induced constraint to amphiphile chain dynamics in wormlike micelles (vol 66, pg 132, 2004) , 2004 .

[12]  P. Callaghan,et al.  Fluctuations in shear-banded flow seen by NMR velocimetry , 2003 .

[13]  A. Ponton,et al.  Flow birefringence, stress optical rule and rheology of four micellar solutions with the same low shear viscosity , 2003, The European physical journal. E, Soft matter.

[14]  S. Manneville,et al.  Velocity profiles in shear-banding wormlike micelles. , 2002, Physical review letters.

[15]  G. Fuller,et al.  Development of a double-beam rheo-optical analyzer for full tensor measurement of optical anisotropy in complex fluid flow , 2002 .

[16]  M. Shirakashi,et al.  Rheo-optic behavior of wormlike micelles under a shear-induced structure formational condition - Verification of stress-optic rule by full component measurement of refractive index tensor , 2002 .

[17]  勉 高橋,et al.  CPyCl/NaSal水溶液の流動誘起構造変化現象と 光学的異方性の関係 , 2001 .

[18]  P. Callaghan,et al.  Shear banding and the isotropic-to-nematic transition in wormlike micelles. , 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

[19]  J. Berret,et al.  Insight in shear banding under transient flow. , 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

[20]  Yang,et al.  Effects of Sodium Salicylate on the Microstructure of an Aqueous Micellar Solution and Its Rheological Responses. , 2000, Journal of colloid and interface science.

[21]  Seung‐Man Yang,et al.  Shear-induced microstructure and rheology of cetylpyridinium chloride/sodium salicylate micellar solutions , 2000 .

[22]  J. Berret,et al.  Correlations between Rheological and Optical Properties of a Micellar Solution under Shear Banding Flow , 2000 .

[23]  Seung-Man Yang,et al.  Microstructures and Rheological Responses of Aqueous CTAB Solutions in the Presence of Benzyl Additives , 2000 .

[24]  P. Callaghan,et al.  Is a birefringence band a shear band? , 2000 .

[25]  T. Hashimoto,et al.  Light Scattering and Small-Angle Neutron Scattering Studies of Structures in a Semidilute Polymer Solution Induced under Oscillatory Shear Flow , 2000 .

[26]  Ross William Mair,et al.  Transition to shear banding in pipe and Couette flow of wormlike micellar solutions , 1999 .

[27]  Paul T. Callaghan,et al.  Shear banding instability in wormlike micellar solutions , 1999 .

[28]  J. Decruppe,et al.  Flow birefringence and stress optical law of viscoelastic solutions of cationic surfactants and sodium salicylate , 1998 .

[29]  Peter Lindner,et al.  Structure and rheology of concentrated wormlike micelles [4]at the shear-induced isotropic-to-nematic transition , 1998 .

[30]  G. Fuller,et al.  Rheo-optical studies of shear-induced structures in semidilute polystyrene solutions , 1997 .

[31]  P. Callaghan,et al.  Nuclear magnetic resonance visualization of anomalous flow in cone-and-plate rheometry , 1997 .

[32]  J. Egmond,et al.  Shear-enhanced orientation and concentration fluctuations in wormlike micelles : Effect of salt , 1997 .

[33]  P. Lindner,et al.  Rheology, birefringence, and small-angle neutron scattering in a charged micellar system: Evidence of a shear-induced phase transition , 1997 .

[34]  P. Callaghan,et al.  Two-Phase Shear Band Structures at Uniform Stress , 1997 .

[35]  G. Porte,et al.  Inhomogeneous shear flows of wormlike micelles:mA master dynamic phase diagram , 1997 .

[36]  J. Decruppe,et al.  Optical and Rheological Properties of a Semi-Diluted Equimolar Solution of Cetyltrimethylammonium Bromide and Potassium Bromide , 1997 .

[37]  P. Callaghan,et al.  Observation of shear banding in worm-like micelles by NMR velocity imaging , 1996 .

[38]  G. Fuller,et al.  Structure and rheology of wormlike micelles , 1996 .

[39]  R. Makhloufi,et al.  Rheo-Optical Study of Worm-like Micelles Undergoing a Shear Banding Flow , 1995 .

[40]  Schmitt,et al.  Shear-induced phase separation of complex fluids: The role of flow-concentration coupling. , 1995, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[41]  Peter Lindner,et al.  Shear-induced orientations and textures of nematic wormlike micelles , 1995 .

[42]  R. Makhloufi,et al.  Flow birefringence experiments showing a shear-banding structure in a CTAB solution , 1995 .

[43]  D. S. Pearson,et al.  Rheo-optical behavior of wormlike micelles , 1994 .

[44]  D. Roux,et al.  Isotropic-to-nematic transition in wormlike micelles under shear , 1994 .

[45]  F. Lequeux,et al.  Flow behavior and shear induced transition near an isotropic/nematic transition in equilibrium polymers , 1994 .

[46]  G. Porte,et al.  Linear rheology of entangled wormlike micelles , 1993 .

[47]  T. Hashimoto,et al.  “Butterfly” Light Scattering Pattern in Shear-Enhanced Concentration Fluctuations in Polymer Solutions and Anomaly at High Shear Rates , 1992 .

[48]  H. Rehage,et al.  Viscoelastic surfactant solutions: model systems for rheological research , 1991 .

[49]  P. Pusey,et al.  Dynamic light scattering by non-ergodic media , 1989 .

[50]  L. G. Leal,et al.  The measurement of velocity gradients in laminar flow by homodyne light-scattering spectroscopy , 1980, Journal of Fluid Mechanics.

[51]  S. Jasperson,et al.  An improved method for high reflectivity ellipsometry based on a new polarization modulation technique [Rev. Sci. Instrum. 40, 95 (1969)] (Errata) , 1969 .