[en] The formation of spherical micelles in aqueous solutions of poly(N-methyl-2-vinyl pyridinium iodide)-block-poly(ethylene oxide), P2MVP-b-PEO and poly(acrylic acid)-block-poly(vinyl alcohol), PAA-b-PVOH has been investigated with light scattering-titrations, dynamic and static light scattering, and 1H 2D Nuclear Overhauser Effect Spectroscopy. Complex coacervate core micelles, also called PIC micelles, block ionomer complexes, and interpolyelectrolyte complexes, are formed in thermodynamic equilibrium under charge neutral conditions (pH 8, 1 mM NaNO3, T = 25 °C) through electrostatic interaction between the core-forming P2MVP and PAA blocks. 2D 1H NOESY NMR experiments show no cross-correlations between PEO and PVOH blocks, indicating their segregation in the micellar corona. Self-consistent field calculations support the conclusion that these C3Ms are likely to resemble a ‘patched micelle’; that is, micelles featuring a ‘spheres-on-sphere’ morphology.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering Chemistry
Author, co-author :
Voets, Ilja K.; Wageningen University (The Netherlands) and Adolphe Merkle Institute, at the University of Fribourg (Switzerland) > Laboratory of Physical Chemistry and Colloid Science (The Netherlands)
de Keizer, Arie; Wageningen University, The Netherlands > Laboratory of Physical Chemistry and Colloid Science
Leermakers, Frans A. M.; Wageningen University, The Netherlands > Laboratory of Physical Chemistry and Colloid Science
Debuigne, Antoine ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Cohen Stuart, Martien A.; Wageningen University, The Netherlands > Laboratory of Physical Chemistry and Colloid Science
Language :
English
Title :
Electrostatic hierarchical co-assembly in aqueous solutions of two oppositevely charged double hydrophilic diblock copolymers
F.R.S.-FNRS - Fonds de la Recherche Scientifique BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique the SONS Eurocores program the EU Polyamphi/Marie Curie program (FP6-2002, proposal 505027) NWO - Nederlandse Organisatie voor Wetenschappelijk Onderzoek
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