Journal article

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
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, = 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
Department
Adolphe Merkle Institute
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301620
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