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Influence of corona structure on binding of an ionic surfactant in oppositely charged amphiphilic polyelectrolyte micelles
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SYSNO ASEP 0458974 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of corona structure on binding of an ionic surfactant in oppositely charged amphiphilic polyelectrolyte micelles Author(s) Delisavva, F. (CZ)
Uchman, M. (CZ)
Škvarla, J. (CZ)
Wozniak, E. (PL)
Pavlova, Ewa (UMCH-V) RID
Šlouf, Miroslav (UMCH-V) RID, ORCID
Garamus, V. M. (DE)
Procházka, K. (CZ)
Štěpánek, M. (CZ)Source Title Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 32, č. 16 (2016), s. 4059-4065Number of pages 7 s. Language eng - English Country US - United States Keywords amphiphilic polymers ; polyelectrolyte ; corona structure Subject RIV CD - Macromolecular Chemistry R&D Projects TE01020118 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) LO1507 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UMCH-V - RVO:61389013 UT WOS 000375243300029 EID SCOPUS 84967316673 DOI 10.1021/acs.langmuir.6b00700 Annotation Interaction of polystyrene-block-poly(methacrylic acid) micelles (PS–PMAA) with cationic surfactant N-dodecylpyridinium chloride (DPCl) in alkaline aqueous solutions was studied by static and dynamic light scattering, SAXS, cryogenic transmission electron microscopy (cryo-TEM), isothermal titration calorimetry (ITC), and time-resolved fluorescence spectroscopy. ITC and fluorescence measurements show that there are two distinct regimes of surfactant binding in the micellar corona (depending on the DPCl content) caused by different interactions of DPCl with PMAA in the inner and outer parts of the corona. The compensation of the negative charge of the micellar corona by DPCl leads to the aggregation of PS–PMAA micelles, and the micelles form colloidal aggregates at a certain critical surfactant concentration. SAXS shows that the aggregates are formed by individual PS–PMAA micelles with intact cores and collapsed coronas interconnected with surfactant micelles by electrostatic interactions. Unlike polyelectrolyte–surfactant complexes formed by free polyelectrolyte chains, the PMAA/DPCl complex with collapsed corona does not contain surfactant micelles. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2017
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