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Updated: Apr 16, 2026

Assembly and Characterization of Polyelectrolyte Complex Micelles
Published on: March 2, 2020
Structure and composition of mixed micelles of polymerized and monomeric surfactants
Paul A FitzGerald1, Khwanrat Chatjaroenporn1, Gregory G Warr1
1School of Chemistry, F11, The University of Sydney, 2006, Australia.
Abstract:
Micelle structure and composition has been determined by small-angle neutron scattering for mixed micellar solutions of in situ polymerized ω-methacryloyloxyundecyl-trimethylammonium bromide (MUTAB) in equilibrium with its monomeric form at various concentrations, as well as in mixtures with a fluorinated cationic surfactant, heptadecafluorodecylpyridinium chloride (HFDePC), and the non-ionic surfactant, C12E7. Whereas polymerized MUTAB is immiscible with HFDePC and forms two populations of distinct spheroidal micelles, it mixes with C12E7 in all proportions and forms a single average micelle structure depending on composition. These results allow us to explain the origin of the previously reported formation of mixed worm-like micelles of polymerized and monomeric MUTAB that coexist with globular monomeric MUTAB micelles as a consequence of the unfavourable electrostatic interactions that accompany the uncoiling of polymerized MUTAB chains in unimer micelles when swollen by monomeric cationic surfactants.
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