Spatially resolved small-angle neutron scattering in the 1-2 plane: A study of shear-induced phase-separating wormlike micelles

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Spatially resolved small-angle neutron scattering in the 1-2 plane: A study of shear-induced phase-separating wormlike micelles

Matthew W. Liberatore, Florian Nettesheim, Norman J. Wagner, and Lionel Porcar

Phys. Rev. E 73, 020504(R) – Published 27 February 2006

Abstract

The shear-induced microstructure of a shear-induced phase separating (SIPS) wormlike micellar solution is measured by combining small-angle neutron scattering with a shear cell capable of gap-resolved measurement in the 1-2 (velocity-velocity gradient) plane. Quantitative results show evidence for shear-induced microphase separation accompanied by shear banding. The results suggest both concentration fluctuations and gradients in segmental alignment occurring during SIPS.

Received 18 March 2005

DOI:https://doi.org/10.1103/PhysRevE.73.020504

Authors & Affiliations

Matthew W. Liberatore, Florian Nettesheim, and Norman J. Wagner^*

Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716, USA

Lionel Porcar

University of Maryland, College Park, Maryland 20742, USA and NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

^*Electronic address: wagner@che.udel.edu

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Vol. 73, Iss. 2 — February 2006

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Physical Review E

covering statistical, nonlinear, biological, and soft matter physics