Abstract

KIANIFARD, Reza  and  BEHCKAM, Isar. Wetting transitions on the submerged metal matrix composite surface . Rev. LatinAm. Metal. Mater. [online]. 2014, vol.34, n.2, pp.282-288. ISSN 0255-6952.

The wetting transition is studied for the oil droplets placed on the underwater surface of metal matrix composites. Oil penetration into the cavities between the asperities is accompanied by a change in the contact angle and may result in the Cassie-Wenzel transitions. Experimental data of contact angles of oil-air, water-air, and oil-water systems on the surface of aluminum-graphite composites are collected. The Wenzel-Cassie wetting transition is revealed by increasing the roughness for various aluminum-graphite samples. A theoretical model is proposed to verify the effect of surface topography and roughness on the wetting transitions.

Keywords : Underwater Wetting Transitions; Superhydrophobicity; Oleophobicity; Oleophilicity.

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