Wetting films in attachment of the colliding bubble

The importance of wetting films in three phase contact formation and attachment of the bubble colliding with different solid surfaces is described The paper reviews main factors determining stability, drainage, rupture, three phase contact (TPC) formation and expansion of the TPC perimeter under dynamic conditions. There are shortly reviewed specific forces of interactions (DLVO and non-DLVO), kinetics of drainage and mechanisms of the wetting film rupture, as well as the TPC formation and expansion. The review is focused on the role of hydrophobic/hydrophilic properties, surface roughness and heterogeneity of the solid substrates for the wetting film stability and rupture under dynamic conditions. Phenomena occurring during collisions of the rising bubble with solid plates of different surface properties are discussed in relation to the kinetics of the wetting films drainage and TPC formation. It is showed that stability and drainage kinetics of the wetting films are decisive for the TPC formation and attachment of the colliding bubble. (c) 2007 Elsevier B.V. All rights reserved.