TY - JOUR
T1 - Electrostatic hierarchical co-assembly in aqueous solutions of two oppositely charged double hydrophilic diblock copolymers
AU - Voets, Ilja K.
AU - Keizer, Arie de
AU - Leermakers, Frans A.M.
AU - Debuigne, Antoine
AU - Jérôme, Robert
AU - Detrembleur, Christophe
AU - Cohen Stuart, Martien A.
PY - 2009/10/1
Y1 - 2009/10/1
N2 - 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.
AB - 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.
KW - Block-copolymers
KW - Complex coacervation
KW - Micelles
KW - Polyelectrolyte
KW - Polyion complex micelles
KW - Self-assembly
UR - http://www.scopus.com/inward/record.url?scp=70249143671&partnerID=8YFLogxK
U2 - 10.1016/j.eurpolymj.2009.06.020
DO - 10.1016/j.eurpolymj.2009.06.020
M3 - Article
AN - SCOPUS:70249143671
SN - 0014-3057
VL - 45
SP - 2913
EP - 2925
JO - European Polymer Journal
JF - European Polymer Journal
IS - 10
ER -