Electrostatic hierarchical co-assembly in aqueous solutions of two oppositely charged double hydrophilic diblock copolymers
- Voets, Ilja K. Laboratory of Physical Chemistry and Colloid Science, Wageningen University, The Netherlands - Adolphe Merkle Institute, University of Fribourg, Switzerland
- Keizer, Arie de Laboratory of Physical Chemistry and Colloid Science, Wageningen University, The Netherlands
- Leermakers, Frans A.M. Laboratory of Physical Chemistry and Colloid Science, Wageningen University, The Netherlands
- Debuigne, Antoine Center for Education and Research on Macromolecules, University of Liège, Belgium
- Jérôme, Robert Center for Education and Research on Macromolecules, University of Liège, Belgium
- Detrembleur, Christophe Center for Education and Research on Macromolecules, University of Liège, Belgium
- Cohen Stuart, Martien A. Laboratory of Physical Chemistry and Colloid Science, Wageningen University, The Netherlands
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30.06.2009
Published in:
- European Polymer Journal. - 2009, vol. 45, no. 10, p. 2913-2925
Block-copolymers
Micelles
Polyion complex micelles
Complex coacervation
Self-assembly
Polyelectrolyte
English
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.
- Faculty
- Faculté des sciences et de médecine
- Department
- AMI - Soft Nanoscience
- Language
-
- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 18098
- DOI 10.1016/j.eurpolymj.2009.06.020
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301620
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