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Updated: Jul 10, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Contribution of flow field flow fractionation with on line static and dynamic light scattering to the study of
Didier Le Cerf1, Sébastien Simon, Jean-François Argillier
1Polymères, Biopolymères, Membranes UMR 6522 CNRS-Université de Rouen, 76 821 Mont Saint Aignan, France.
Abstract:
Water soluble polyelectrolyte complexes (PECs) formed between polyaspartate (anionic polymer) and poly(trimethylammonium propyl methacrylamide chloride) (cationic polymer) were studied by flow field flow fractionation with on-line coupling multi-angle laser light scattering-quasi elastic light scattering-differential refractive index determination (F4/MALLS/QELS/DRI). The separation technique permits to characterize polydisperse PECs. The molar mass of the polycation (PC) influences the stiffness of the PECs and the proportion between single PECs (i.e. nPA/1PC) and multiple PECs (i.e. nPA/n'PC). High ionic strength with NaCl (>0.1 M) tends to break the multiple PECs while CaCl2 destroys PECs and leads to the formation of complexes polyaspartate/Ca2+. The studied PECs can be used as inhibitors to the calcite formation in the drilling fluids.
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