Abstract
A new equation has been obtained for calculating the equilibrium contact wetting angle on the basis of the capillary constant evaluated from the shape of a real droplet of liquid on a solid surface. The value of the surface tension of liquid is determined experimentally using the geometric parameters of the liquid droplet on a solid surface. The proposed equations make it possible to determine the equilibrium contact wetting angle of the solid body surface with thermodynamic parameters σliq–g, σs.b–liq and σs.b–g on the interface between three phases: solid body–liquid–gas.
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