Séminaires MSC
"Matière et Systèmes Complexes"


Lundi 26 octobre 2009 à 11h30
Bâtiment Condorcet, 4ème étage, salle 454 A.

Yurij Antonov
(Physicochimie des Biopolymères, Intitut of Biochemical Physics, Moscow)

Inducing mixing/demixing of biopolymer mixtures in the presence of strong polyelectrolyte

(From semidilute biopolymer solutions to biopolymer emulsions)

 The weak intermacromolecular interactions caused by the presence of a complexing agent in two phase biopolymer mixture can affect its phase equilibrium and morphology. In this communication, the attempt was performed to induce demixing in semidilute and concentrated biopolymer systems in the presence of sodium salt of dextran sulfate (DSS), and to characterize phase equilibrium, intermacromolecular interactions, and structure of such systems by rheo-small angle light scattering (SALS), optical microscopy (OM), phase analysis, dynamic light scattering (DLS), fast protein liquid chromatography (FPLC), ESEM, and rheology.