Laplace pressure based disjoining pressure isotherm in non symmetric conditions

Effect of Disjoining Pressure on Surface Nanobubbles.

In gas-oversaturated solutions, stable surface nanobubbles can exist thanks to a balance between the Laplace pressure and the gas overpressure, provided the contact line of the bubble is pinned. In this article, we analyze how the disjoining pressure originating from the van der Waals interactions of the liquid and the gas with the surface affects the properties of the surface nanobubbles. From...

Disjoining Pressure of Water Films in Frozen Materials

Abstract Using dilatometry method the thickness of nonfreezing film formed on inner molecularly smooth surface of a thin (micrometer size) quartz capillary was first measured in dependence on temperature and external pressure on ice in the temperature range from 1°C to -0.14°C and pressures up to 8 MPa. The data obtained were used for calculation of disjoining pressure isotherms of nonfreezing ...

Effect of disjoining pressure in a thin film equation with non-uniform forcing

Disjoining pressure of discrete surface charges on thin aqueous films.

The disjoining pressure of charged parallel interfaces confining an electrolyte solution is to a large extent determined by the screening clouds of the surface charges. We evaluate the pressure in terms of the number density sigma of discrete charges and film thickness d and find, at sigmad(2) approximately 1, a crossover from the well-known law P approximately sigma(2) to a linear behavior P a...

Liquid nanofilms. A mechanical model for the disjoining pressure

Liquids in contact with solids are submitted to intermolecular forces making liquids heterogeneous and, in a mechanical model, the stress tensor is not any more spherical as in homogeneous bulks. The aim of this article is to show that a square-gradient functional taking into account the volume liquid free energy corrected with two surface liquid density functionals is a mean field approximatio...