Journal Article

PUBDB-2015-00433

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Study of Complex Thermosensitive Amphiphilic Polyoxazolines and their Interaction with Ionic Surfactants. Are Hydrophobic, Thermosensitive, and Hydrophilic Moieties Equally Important?

Bogomolova, A.Extern* ; Filippov, S. (Corresponding author)Extern* ; Starovoytova, L. ; Angelov, B.Extern* ; Konarev, P.>Extern*EMBL* ; Svergun, D.>Extern*EMBL* ; Sedlacek, O. ; Hruby, M. ; Stepanek, P.

2014
Soc. Washington, DC

This record in other databases:        

Please use a persistent id in citations: doi:10.1021/jp5011296

Abstract: 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.

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Contributing Institute(s):

1. EMBL-User (EMBL-User)

Research Program(s):

1. PETRA Beamline P12 (POF2-54G14) (POF2-54G14)
2. BIOSTRUCT-X - Transnational access and enhancement of integrated Biological Structure determination at synchrotron X-ray radiation facilities (283570) (283570)
3. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P12 (PETRA III)

Appears in the scientific report 2014

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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