Dispersion of Silica Fines in Water–Ethanol Suspensions

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

“…In our study, this phenomenon is more pronounced for X Methanol = 0.4, which corresponds to the maximum discrepancies between ζ potentials obtained from different techniques. Results reported for the dispersion stability of fine silica suspensions in water-ethanol suspensions [16] and from molecular dynamic simulation of colloidal particles in alcohol-water mixtures [17] are in fair agreement. Following the Einstein theory of viscosity, the solvation film thickness of the adsorbed layer in silica was found to be 18.2, 36, and 26.8 nm for pure water, at 50%, and for pure ethanol [16], respectively.…”

“…Results reported for the dispersion stability of fine silica suspensions in water-ethanol suspensions [16] and from molecular dynamic simulation of colloidal particles in alcohol-water mixtures [17] are in fair agreement. Following the Einstein theory of viscosity, the solvation film thickness of the adsorbed layer in silica was found to be 18.2, 36, and 26.8 nm for pure water, at 50%, and for pure ethanol [16], respectively. Shinto et al [17] concluded that the alcohol molecules are adsorbed vertically on the surface particle.…”

Controlling submicron-particle template morphology: effect of solvent chemistry

“…Images (a) and (b) are deposits from ethanol and ultrapure water, respectively. In both cases, there is a net repulsive interaction between the particles in suspension and no aggregates have formed; for deposits obtained from ethanol, we observe that the arrangement is more Calculations of interaction energy were performed applying DLVO theory of electrostatic interactions and the set of equations derived by Kralchevsky et al that describe capillary interactions between particles partially submerged in a liquid [11,18,19]. Figs.…”

Rheology and Structure of Cornstarch Suspensions in Water-Poly(propylene glycol) Mixtures

“…[14, 29,31] However, there are also exceptions to this, and 15 so the situation is far from being clear-cut. For example, lower alcohol concentrations have also been found to increase the absolute zeta potential, a finding interpreted in terms of the adsorption of alcohol to the particle surface with concomitant displacement of counterions from the Stern layer into the diffuse layer.…”