Počet záznamů: 1
Polyelectrolyte-surfactant complexes of poly[3,5-bis(dimethylaminomethyl)-4-hydroxystyrene]-block-poly(ethylene oxide) and sodium dodecyl sulfate: anomalous self-assembly behavior
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SYSNO ASEP 0392228 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Polyelectrolyte-surfactant complexes of poly[3,5-bis(dimethylaminomethyl)-4-hydroxystyrene]-block-poly(ethylene oxide) and sodium dodecyl sulfate: anomalous self-assembly behavior Tvůrce(i) Hajduová, J. (CZ)
Procházka, K. (CZ)
Šlouf, Miroslav (UMCH-V) RID, ORCID
Angelov, Borislav (UMCH-V) RID
Mountrichas, G. (GR)
Pispas, S. (GR)
Štěpánek, M. (CZ)Zdroj.dok. Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 29, č. 18 (2013), s. 5443-5449Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova polymer self-assemblies ; light and X-ray scattering ; electron microsocopy Vědní obor RIV JA - Elektronika a optoelektronika, elektrotechnika CEP TE01020118 GA TA ČR - Technologická agentura ČR GA13-02938S GA ČR - Grantová agentura ČR Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000318756200008 DOI 10.1021/la400583z Anotace Polyelectrolyte–surfactant complexes (PE–S) formed by double hydrophilic cationic polyelectrolyte poly[3,5-bis(dimethylaminomethyl)-4-hydroxystyrene]-block-poly(ethylene oxide) (NPHOS-PEO) and anionic surfactant sodium dodecyl sulfate (SDS) in acidic aqueous solutions were studied by light scattering, SAXS, and scanning transmission electron microcopy in the environmental mode (wet-STEM) for various stoichiometric ratios between the numbers of SDS anions and dimethylaminomethyl groups of NPHOS in the complex. The obtained results show that the NPHOS-PEO/SDS system behaves differently from other systems of double hydrophilic block polyelectrolyte and oppositely charged ionic surfactant because it forms water-insoluble PE–S for compositions close to the zero net charge of the complex. This phase separation occurs, instead of the PE–S rearrangement to core–shell particles, which is hindered due to conformational rigidity of the NPHOS blocks. For the surfactant amounts below and above the precipitation region, large spherical aggregates and their clusters are present in the solution. SAXS measurements indicate that although the NPHOS-PEO/SDS system does not form the core–shell particles with the NPHOS/SDS core and the PEO shell as other PE–S of double hydrophilic polyelectrolytes, the aggregates contain domains of closely packed surfactant micelles which bind to both NPHOS polyelectrolyte blocks and PEO blocks. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2014
Počet záznamů: 1