Počet záznamů: 1
Study of complex thermosensitive amphiphilic polyoxazolines and their interaction with ionic surfactants. Are hydrophobic, thermosensitive, and hydrophilic moieties equally important?
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SYSNO ASEP 0427980 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Study of complex thermosensitive amphiphilic polyoxazolines and their interaction with ionic surfactants. Are hydrophobic, thermosensitive, and hydrophilic moieties equally important? Tvůrce(i) Bogomolova, Anna (UMCH-V) RID
Filippov, Sergey K. (UMCH-V) RID, ORCID, SAI
Starovoytova, Larisa (UMCH-V) RID
Angelov, Borislav (UMCH-V) RID
Konarev, P. (DE)
Sedláček, Ondřej (UMCH-V) RID, ORCID
Hrubý, Martin (UMCH-V) RID, ORCID
Štěpánek, Petr (UMCH-V) RID, ORCIDZdroj.dok. Journal of Physical Chemistry B. - : American Chemical Society - ISSN 1520-6106
Roč. 118, č. 18 (2014), s. 4940-4950Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova poly(2-alkyl-2-oxazoline) ; thermosensitivity ; ionic surfactant Vědní obor RIV CD - Makromolekulární chemie CEP GAP205/11/1657 GA ČR - Grantová agentura ČR FR-TI4/625 GA MPO - Ministerstvo průmyslu a obchodu Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000335878000025 EID SCOPUS 84900346224 DOI 10.1021/jp5011296 Anotace The temperature-driven self-assembly of nonionic amphiphilic tailor-made triblock copolymers has been studied by DLS, NMR, ITC, and SAXS. The composition of these triblock copolymers is more complex than that of the vast majority of poly(2-alkyl-2-oxazoline)s: a statistical thermoresponsive (iPrOx) and hydrophobic (BuOx) central block with terminal hydrophilic blocks (MeOx). In general, as temperature increases, nanoparticles form in a process starting with single molecules that become loose aggregates and ends with the formation of compact nanoparticles. Here, we first attempt to resolve the effects of each block on nanoparticle formation. It has been proven that the iPrOx/MeOx ratio determines the value of the cloud point temperature, whereas the different BuOx–iPrOx blocks determine the character of the process. Finally, we complete our investigation by presenting the thermodynamic and structural profiles of the complexation between these triblock poly(2-alkyl-2-oxazoline)s and two ionic surfactants. The addition of an ionic surfactant promotes a rearrangement of the polymer molecules and the formation of complexes followed by the appearance of polymer–surfactant hybrid micelles. Analysis of the interaction shows a strong and nonspecific reaction between the polymers and the anionic surfactant sodium dodecyl sulfate and weak but polymer-state-sensitive interactions between the polymer and the cationic surfactant hexadecyltrimethylammonium bromide. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2015
Počet záznamů: 1