CAPILLARY PHENOMENA STUDIES AT LIQUID₁—SOLID—LIQUID₂ INTERPHASE USING MODEL SYSTEMS IMITATING MICROGRAVITY/ZERO—GRAVITY STATES

Abstract

For a number of contacting model pairs: olive, castor oil—glass, paraffined glass; water—glass; paraffined glass; water/ethanol—glass, paraffined glass wetting studies in the air atmosphere were performed by a sessile drop method. Taking into account data obtained wetting and spreading peculiarities were studied in dynamics by video filming for liquid (oil) contacting with solid surface (glass, paraffined glass) immersed in another liquid (water, water-ethanol solution) immiscible with the first one and having density equal to that of said solution (thus imitating microgravity/zero-gravity state) — at liquid₁—solid—liquid₂ interface. The results obtained can have some practical application in particular for modeling and studying the processes of purposeful liquid capillary transportation, liquids separation and purification at microgravity conditions and development of appropriate space technologies. Keywords: wetting, spreading, paraffined glass, interphase, immiscible