title: Yield stress and scaling of polyelectrolyte multilayer modified suspensions: effect of polyelectrolyte conformation during multilayer assembly.
abstract: The yield stress of polyelectrolyte multilayer modified suspensions exhibits a surprising dependence on the polyelectrolyte conformation of multilayer films. The rheological data scale onto a universal master curve for each polyelectrolyte conformation as the particle volume fraction, φ, and the ionic strength of the background fluid, I, are varied. It is shown that rough films with highly coiled, brushy polyelectrolytes significantly enhance the yield stress. Moreover, via the ionic strength I of the background fluid, the dynamic yield stress of brushy polyelectrolyte multilayers can be finely adjusted over 2 decades.
authors: Department of Mechanics and Fluid Dynamics, Freiberg University of Mining and Technology , Freiberg, Saxony, D-09596 Germany , and.
authors: Andreas
authors: A
authors: Hess
authors: Nuri
authors: N
authors: Aksel
mesh_terms: D006863:Hydrogen-Ion Concentration; D008968:Molecular Conformation; D011095:Polyethylenes / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013535:Suspensions; D014867:Water / Q000737:chemistry
chemical_list: D011095:Polyethylenes; D011137:Polystyrenes; D000644:Quaternary Ammonium Compounds; D013535:Suspensions; D014867:Water; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; C003321:polystyrene sulfonic acid