Impact of Polyelectrolyte Chemistry on the Thermodynamic Stability of Oppositely Charged Macromolecule/Surfactant Mixtures

• DOI: 10.1021/acs.langmuir.5b04431
• Publication Date: 2016-01-18T22:10:43Z
• Authors: Katalin Bodnár; Edit Fegyver; Miklós Nagy; Róbert Mészáros
• Keywords: Vinyl alcohol; Cationic polymerization; Sodium dodecyl sulfate

The complexation between hexadecyl- and dodecyltrimethylammonium bromides (CTAB DTAB) with sodium poly[(vinyl alcohol)-co-(vinyl sulfate)] (PVAS) copolymer of low charge density has been investigated using pyrene fluorescence spectroscopy, electrophoretic mobility, turbidity, dynamic light scattering measurements. results indicate that the binding cationic surfactant occurs in three steps. At concentrations, amphiphile binds to vinyl sulfate groups. Above neutralization, may occur on surface hydrophobic sulfate/CnTAB nanoassemblies. even higher nonionic alcohol units polyion which reswells PVAS/CnTAB complexes makes them highly soluble water. In earlier studies oppositely charged ionic surfactants homopolyelectrolytes impact mixing protocols was found remarkable, especially at excess, where these systems can be trapped stabilized colloidal dispersion state. contrast, case mixtures effect is less pronounced diminishes increasing strength or decreasing alkyl chain length surfactant. These findings are rationalized by taking into account different mechanism double hydrophilic copolymers.