Počet záznamů: 1

Polyelectrolyte-surfactant complexes formed by poly[3,5-bis(trimethylammoniummethyl)4-hydroxystyrene iodide]-block-poly(ethylene oxide) and sodium dodecyl sulfate in aqueous solutions

  1. 1.
    0359222 - UMCH-V 2012 RIV US eng J - Článek v odborném periodiku
    Štěpánek, M. - Matějíček, P. - Procházka, K. - Filippov, Sergey K. - Angelov, Borislav - Šlouf, Miroslav - Mountrichas, G. - Pispas, S.
    Polyelectrolyte-surfactant complexes formed by poly[3,5-bis(trimethylammoniummethyl)4-hydroxystyrene iodide]-block-poly(ethylene oxide) and sodium dodecyl sulfate in aqueous solutions.
    Langmuir. Roč. 27, č. 9 (2011), s. 5275-5281 ISSN 0743-7463
    Grant CEP: GA MŠk ME09059; GA ČR GCP205/11/J043; GA ČR GAP208/10/0353
    Výzkumný záměr: CEZ:AV0Z40500505
    Klíčová slova: polyelectrolyte-surfactant complexes * sodium dodecyl sulfate * small-angle X-ray scattering
    Kód oboru RIV: CD - Makromolekulární chemie
    Impakt faktor: 4.186, rok: 2011

    Formation of polyelectrolyte−surfactant (PE−S) complexes of poly[3,5-bis(trimethylammoniummethyl)-4-hydroxystyrene iodide]-block-poly(ethylene oxide) (QNPHOS−PEO) and sodium dodecyl sulfate (SDS) in aqueous solution was studied by dynamic and electrophoretic light scattering, SAXS, AFM, and fluorometry. SAXS data from the QNPHOS−PEO/SDS solutions were fitted assuming contributions from free copolymer, PE−S aggregates described by a mass fractal model, and densely packed surfactant micelles inside the aggregates. It was found that, unlike other systems of a double hydrophilic block polyelectrolyte and an oppositely charged surfactant, PE−S aggregates of the QNPHOS−PEO/SDS system do not form core−shell particles and the PE−S complex precipitates before reaching the charge equivalence between dodecyl sulfate anions and QNPHOS polycationic blocks, most likely because of conformational rigidity of the QNPHOS blocks, which prevents the system from the corresponding rearrangement.
    Trvalý link: http://hdl.handle.net/11104/0006434