Polyelectrolyte adsorption, interparticle forces, and colloidal aggregation

Adsorption of polyelectrolytes and inter-colloidal forces

The e ect of charged polymers on the interactions between charged surfaces in solution is investigated theoretically. We use meaneld theory to derive a self-consistent eld equation for the polymer order parameter, and a modi ed Poisson–Boltzmann equation for the electrostatic potential. The two di erential equations together with the appropriate boundary conditions are solved numerically. We us...

Adsorption, aggregation and phase separation in colloidal systems

Polyelectrolyte adsorption

The problem of charged polymer chains (polyelectrolytes) as they adsorb on a planar surface is addressed theoretically. We review the basic mechanisms and theory underlying polyelectrolyte adsorption on a single surface in two situations: adsorption of a single charged chain, and adsorption from a bulk solution in θ solvent conditions. The behavior of flexible and semi-rigid chains is discussed...

Polyelectrolyte adsorption

2014 The adsorption of uncharged polymers is, due to numerous efforts over past decades, fairly well understood. Some insight exists into the structure of the adsorbed layer, and the effect of the important parameters molecular weight, solvency and polymer/surface interaction has been investigated. Theory and experiment are beginning to converge. The polyelectrolyte adsorption process, however,...

Aggregation in colloidal suspensions: effect of colloidal forces and hydrodynamic interactions.

The forces acting in colloidal suspensions and affecting their stability and aggregation kinetics are considered. The approximations used for these forces in numerical simulations and the importance of the balanced account for both colloidal forces and hydrodynamic interactions are discussed. As an example the results of direct numerical simulations of kinetics of aggregation either with accoun...