Understanding the Origins of Enhanced Viscosities in Oppositely Charged Polyelectrolyte/Surfactant Mixtures
Mixtures of oppositely charged surfactant and polyelectrolyte show rich aggregation behaviour that varies over a large size range. Some of these systems allow to control the rheological properties of water-based systems over a broad range of viscosities and relaxation times by the addition of rather small amounts of material. Accordingly they have many applications e.g. in cosmetics, detergency, and drug delivery. In the semi-dilute regime a strong increase in viscosity is observed as surfactant is added to the cationic, cellulose based polyelectrolyte JR 400 as long as the charge ratio Z (polyelectrolyte charges/ surfactant charges) between polyelectrolyte and surfactant is larger than 1, and the alkyl chain of the surfactant is sufficiently long. Here, we want to elucidate the structural differences between a system in which the viscosity is increased and a system where it is not affected by the addition of surfactant to better understand the underlying mechanisms.
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HOFFMANN Ingo; DEL SORBO Giuseppe Rosario and SCHNECK Emanuel. (2018). Understanding the Origins of Enhanced Viscosities in Oppositely Charged Polyelectrolyte/Surfactant Mixtures. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-539
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