Destabilization of polystyrene latex particles induced by adsorption of polyvinylamine: Mass, size and structure characteristics of the growing aggregates

Interaction and Structure of Surfaces Coated by Poly(vinyl amines) of Different Line Charge Densities

“…The highly flexible PVA with its high line charge density was shown to be very effective to control the stability of colloidal suspensions. [4][5][6] Polyelectrolytes are further used as adhesion modifiers, coupling agents, or building blocks for multilayer films. [13][14][15][16][17][18][19][20][21][22] These applications mostly rely on polymeric layers formed equally by adsorption from solution, but such adsorbed polyelectrolyte films are subsequently exposed to polyelectrolyte-free solutions, possibly of a different composition from the solution used for adsorption.…”

“…Poly(vinyl amine) (PVA) was recently suggested as an alternative to more traditional cationic polyelectrolytes used in industrial applications, especially as retention aids in paper making, stabilizers of colloidal suspensions, or flocculants for water purification. − In these applications, polyelectrolytes are added to the colloidal suspensions, whereby they adsorb to the respective particle surfaces. The adsorbed polyelectrolyte layers modify the interaction forces between the particles, and influence the suspension stability or its rheological properties. − The structure of such adsorbed layers depends on the properties of the polyelectrolytes and the surfaces, in particular, on the respective charge densities, solution composition, and polymer architecture.…”

“…The adsorbed polyelectrolyte layers modify the interaction forces between the particles, and influence the suspension stability or its rheological properties. − The structure of such adsorbed layers depends on the properties of the polyelectrolytes and the surfaces, in particular, on the respective charge densities, solution composition, and polymer architecture. The highly flexible PVA with its high line charge density was shown to be very effective to control the stability of colloidal suspensions. − …”

The use of dielectric spectroscopy for the characterization of polymer-induced flocculation of polystyrene particles

“…Depending on the characteristics of the polymer and the particle, the adsorption will generally facilitate flocculation through one of three mechanisms: (1) charge neutralization caused by the evenly distributed adsorption of low-molecular-weight polymer [5], (2) patch flocculation caused by a mosaic-like adsorption of a highly charged medium-molecular-weight polymer, resulting in a patchlike charge inversion [6], or (3) bridging caused by the adsorption of a highmolecular-weight polymer onto more than one particle [7]. Flocculation has been the subject of several studies, both theoretical [2,5,6,[8][9][10][11] and experimental [12][13][14][15]. Describing the process in generalized terms is complicated by the complex kinetics of polymer mixing, polymer-particle collision, polymer adsorption, polymer reconfiguration, particle-particle collision, and particle-* Corresponding author.…”

Polymer-Coated Nanoparticles by Adsorption of Hydrophobically Modified Poly(N,N-dimethylacrylamide)

“…Polymer segments can physically adsorb to surfaces by electrostatic interaction, hydrophobic interaction, or ion binding . It is well-known that polymers bound to colloid particles can either impart stability through a steric mechanism, preventing the close approach of the colloid particles, or they can induce aggregation, for example, by “bridging” two or more particles . This behavior is in part controlled by the amount of polymer adsorbed on the particle surface, which depends on several factors such as polymer molecular weight, hydrophobicity, adsorption energy, solvent quality, its concentration in the dispersion, and the presence of specific groups.…”