Adsorption of Weak Polyelectrolytes on Amphoteric Oxide Surfaces

Phase behavior of casein micelles/exocellular polysaccharide mixtures: Experiment and theory

“…This equation describes the data in Ref. 31 reasonably well and gives a correct physical description for the limits. For the sedimentation of colloidal particles through a polymer solution, Tong et al 34 also found that for very large values of h the particles experience a much lower viscosity than that of the solvent with polymer molecules.…”

“…The macroscopic viscosity overestimates the friction experienced by the colloidal particles. 31 This phenomenon has been examined theoretically by Cukier 32 and De Gennes, 33 who found that relatively small colloidal particles tend to ''hunt for holes'' in polymer solutions. Microscopically a polymer solution can be regarded as a system containing obstacles ͑polymer chains͒ with a high resistance.…”

“…The data in Ref. 31 are described the best way if the end-to-end distance is taken for R P . With R S ϭ100 nm this gives h Ϸ2.11.…”

Trends in the adsorption of mono-end-capped polystyrenes onto polar substrates: Theoretical predictions and experimental observations

“…The segment density profile of the adsorbed homopolymers and brushes from the surface outward has been calculated,2, 12–14 as has the interacting influence of surface roughness, curvature, and chain length ( N ) on the absorbed amount (Γ) 15–18. The nature of the surface–segment interaction (and how that interaction can be manipulated)19–23 and the motional constraints placed upon the adsorbed segment (reversibly or irreversibly adsorbed, able to diffuse across the surface or not, the formation of a “glassy” monolayer, etc.) have all been shown to play a part in determining equilibrium adsorptivity 24–27…”

Oscillatory structural forces between charged interfaces in solutions of oppositely charged polyelectrolytes

“…While several researchers have studied the behavior of polyelectrolytes near oppositely charged substrates, investigations focused almost exclusively on the adsorption of polyelectrolytes, which dominates the behavior of these systems at low polyelectrolyte concentrations. [14][15][16][17][18][19][20][21][22] This adsorption typically induces a charge reversal of the substrate, which has major consequences on the interaction forces and stability of colloidal suspensions. At higher concentrations, however, similar oscillatory structural forces might occur as reported in the like-charged systems.…”