Time-Resolved Small-Angle Neutron Scattering Study of Shear-Thickening Surfactant Solutions after the Cessation of Flow
Source abstract
Abstract
Shear effects in dilute solutions of gemini surfactant solutions are studied by SANS in the shear-thickening regime. After the cessation of flow, the local anisotropy relaxes in about 10 2 s and we find evidence for a shear-induced change in the structure of the solutions that is stable for at least a few hours. The results can be understood if the shear-induced viscous phase is a loosely connected network of long-lived aggregates with typical size of 1 μm. Counterions-mediated attraction between rodlike micelles could explain the formation of the aggregates and their long lifetime. The whole picture is consistent with previous results obtained for the same system using different techniques.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Surfactants and Colloidal Systems · Electrostatics and Colloid Interactions · Material Dynamics and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratoire de Dynamique des Fluides Complexes, UMR 7506, Institut de Physique, 3 rue de l'Université, 67084 Strasbourg Cedex, France, IECB-Polytechnique, ENSCPB, Avenue Pey. Berland, 33402 Talence, France, Institut Laue Langevin, BP 156, 38042 Grenoble Cedex, France, and Department of Chemical Engineering, University of California, Santa Barbara, California 93106-5080
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