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Capillary flow behavior of worm‐like micelles studied by small‐angle X‐ray scattering and small angle light scattering
Author(s) -
Castelletto V.,
Hamley I. W.
Publication year - 2006
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.712
Subject(s) - small angle x ray scattering , micelle , materials science , scattering , light scattering , aqueous solution , small angle scattering , capillary action , optics , flow (mathematics) , crystallography , composite material , chemistry , physics , mechanics , organic chemistry
A novel capillary flow device has been developed and applied to study the orientation of worm‐like micelles, among other systems. Small‐angle X‐ray scattering (SAXS) data from micelles formed by a Pluronic block copolymer in aqueous salt solution provides evidence for the formation of worm‐like micelles, which align under flow. A transition from a rod‐like form factor to a less persistent conformation is observed under flow. Flow alignment of worm‐like micelles formed by the low molar mass amphiphile system cetyl pyridinium chloride+sodium salicylate is studied for comparative purposes. Here, inhomogenous flow at the micron scale is revealed by streaks in the small‐angle light scattering pattern perpendicular to the flow direction. Copyright © 2006 John Wiley & Sons, Ltd.