Electrokinetic motion of a submerged oil droplet near an air…
2018年12月31日 · The numerical results indicate that a negatively charged oil droplet near a negatively charged air–water interface moves toward the positive electrode of the DC electric field, and under higher electric field strength, droplet’s radius, ionic concentration, and absolute values of the two interface zeta potentials, the moving velocity of the ...
Soft electrostatic repulsion in particle monolayers at liquid ...
2016年7月28日 · The soft electrostatic repulsion between the particles in a monolayer on an air/water (or oil/water) interface is mediated by the non-polar fluid, where Debye screening is absent and the distances between the particles are considerably greater than their diameters. Surface pressure versus area isotherms were measured at the air/water interface.
Effects of electric field on the filtration characteristics of solid ...
2023年8月1日 · Therefore, in this paper, the effect of the applied electric field on the movement of solid particles in oil and the filtration performance of the system is investigated by establishing a numerical model of oil filtration and separation under the reinforcing effect of an electric field for the proposed method.
Tuning Electrostatic Interactions of Colloidal Particles at Oil …
2023年9月19日 · Monolayers of colloidal particles at oil-water interfaces readily crystallize owing to electrostatic repulsion, which is often mediated through the oil. However, little attempts exist to control it using oil-soluble electrolytes.
Electrostatic potential between charged particles at an oil-water interface
2020年8月31日 · Here we explicitly calculate the in-plane potential of a point charge at an interface between two electrolyte solutions with different, finite dielectric permittivities and Debye screening lengths, such as oil and water.
Starting from the effective interaction between two planar walls and by using the Derjaguin approxi-mation, we address the issue of how the electrostatic interaction between such particles is influenced by their curvatures and by the wetting contact angle at their surfaces.
Electric-field-induced capillary attraction between like-charged ...
2002年11月21日 · Here we present quantitative measurements of attractive interactions between colloidal particles at an oil–water interface and show that the attraction can be explained by capillary forces that...
Microspheres viscous drag at a deformed fluid interface: particle…
2021年3月10日 · Using available models of particle-induced electrostatic deformation of the interface and particle dynamics at the interface, we are able to analytically predict particle diffusion coefficient values in a large range of particle’s contact angle and size.
The influence of particle size and residual charge on electrostatic ...
2014年6月4日 · Electrostatic interactions of polystyrene particles at an oil/water interface controlled by a chemical reaction of carboxylate surface functional groups are studied to conclude that structural change is the result of change of the repulsive interactions from the oil phase, although interactions in the water phase are also changed slightly.
Electrostatics at the oil–water interface, stability, and order in ...
2007年2月20日 · Preferential ion uptake leads to a tunable droplet charge and surprisingly stable, additive-free, water-in-oil emulsions that can crystallize. For particle-stabilized (“Pickering”) emulsions we find that even extremely hydrophobic, nonwetting particles can be strongly bound to (like-charged) oil–water interfaces because of image charge effects.