Streaming Current of Polystyrene Porous Plugs: Solvent Composition Effect

The Surface Charge Density Influence on the Electrokinetic Properties of Model Colloids: Solvent Composition Effect

“…This may be attributed to various effects: (i) A dissociation decrease of the functional (sulfate) groups at higher ethanol content, lowering the titrable charge. Such an effect has been reported in previous papers (12,13). (ii) A change in the solvent-solvent interactions due to the addition of ethanol molecules may bring out a decrease in some of the medium properties such as the dielectric constant and the liquid conductivity and, as a consequence of the latter, a decrease in the ionic mobility.…”

Stability of aqueous TiO2 suspensions: influence of ethanol

“…The mechanism considered here is thus compatible with the experimental results of zeta potential measurements and potentiometric titration. It was evoked moreover, by several authors [20,21]. To confirm the role of ethanol in the distribution of the species in the close vicinity of the surface, other techniques of characterization must be developed, such as the measurements of forces between surfaces by atomic force microscopy.…”

Streaming current, permeability, and microelectrophoresis of polystyrene latices in methanol–ethanol mixtures

“…The streaming current setup was previously described [2]. Before the electric conductivity of the porous plug was determined, the study was focused on the cell (without material).…”

“…The porous plugs were prepared via centrifugation, since this is the most successful preparation technique [2,7]. The particle diameter is shown in Table 1.…”

“…Many studies have been focused on electrokinetic behavior in the aqueous medium and binary mixtures of water and alcohols [1,2]. Nevertheless, very few works have studied electrokinetic properties in methanol-ethanol mixtures.…”