This book chronicles the proceedings of the International Symposium on Apparent and Microscopic Contact Angles, held in conjunction with the American Chemical Society meeting in Boston, August 24--27, 1998. The symposium provided an opportunity to discuss several controversial issues associated with interfacial phenomena that govern the behavior of the three-phase systems. This volume contains 28 papers --- previously published in 3 issues of the Journal of Adhesion Science and Technology. The book is divided into four parts: Nanoscopic and Molecular Effects on Contact Angles; Surface Forces and Surface Free Energy; Wetting of Heterogeneous, Rough and Curved Surfaces; Dynamic Effects in Contact Angle Measurements. Among the topics covered are: contact line tension measurement; liquid drop surface topography; molecular mechanisms of hydrophobic transitions; stereochemical and conformational aspects of polymer surfaces; determination of acid-base properties of metal oxides and polymers by contact angle measurement; van Oss--Good theory of acid-base surface free energies; AFM measurement of forces; thin liquid films; wettability of flat and curved surfaces; contact angle hysteresis; factors affecting contact angle meassurements; dynamic wetting behavior; and effect of surfactants on wetting.
PART 1: NANOSCOPIC AND MOLECULAR EFFECTS ON CONTACT ANGLES Measurement of contact line tension by analysis of the three-phase boundary with nanometer resolution T. Pompe, A. Fery and S. Herminghaus Nanometer resolution of liquid surface topography by scanning force microscopy A. Fery, T. Pompe and S. Herminghaus Instability of the three-phase contact region and its effect on contact angle relaxation J. Drelich Molecular mechanisms of hydrophobic transitions V.V. Yaminsky Wetting of SiO2 surfaces by phospholipid dispersions L.C. Salay and A.M. Carmona-Ribeiro Wettability and microstructure of polymer surfaces: Sterochemical and conformational aspects O.N. Tretinnikov Contact angles on quartz induced by adsorption of heteropolar hydrocarbons X. Xie and N.R. Morrow PART 2: SURFACE FORCES AND SURFACE FREE ENERGY Determination of acid-ase properties of metal oxide films and of polymers by contact angle measurements E. McCafferty and J.P. Wightman Acid-base surface free energy of solids and the definition of scales in the van Oss-Good theory C. Della Volpe and S. Siboni The gap between the measured and calculated liquid-liquid interfacial tensions derived from contact angles L.-H. Lee Effect of external radiofrequency electric field on the surface free energy components of calcium carbonate in the presence of cationic and anionic surfactants E. Chibowski, L. Holys and M. Lubomska AFM measurements of hydrophobic forces between a polyethylene sphere and silanated silica plates - the significance of surface roughness J. Nalaskowski, S. Veeramasuneni, J. Hupka and J.D. Miller Self organization in thin liquid films: dynamics and patterns in systems displaying a secondary minimum J. Singh and A. Sharma PART 3: WETTING OF HETEROGENEOUS, ROUGH AND CURVED SURFACES Underwater captive bubble technique on curved surfaces of blended polydimethylsiloxanes E.A. Angu, R.C. Cameron, S.K. Pollack and W.E. Collins Thermodynamic equilibrium and stability of liquid films and droplets on fibers A.V. Neimark Estimation of contact angles on fibers G. McHale, S.M. Rowan, M.I. Newton and N.A. KÃ¤b Evolution of surface chemistry and physical properties during thin film polymerization of thermotropic liquid crystalline polymers K.-X. Ma, T.-S. Chung, P.K. Pallathadka and S.-S. Feng The combined effect of roughness and heterogeneity on contact angles: the case of polymer coating for stone protection C. Della Volpe, A. Penati, R. Peruzzi, S. Siboni, L. Toniolo and C. Colombo Microsphere tensiometry to measure advancing and receding contact angles on individual particles S. Ecke, M. Preuss and H.-J. Butt Wettability of fine solids extracted from bitumen froth F. Chen, J.A. Finch, Z. Xu and J. Czarnecki Modification of calcium carbonate surface properties: macroscopic and microscopic investigations M. Chamerois, M. FranÃ§ois, F. VilliÃ©ras and J. Yvon Factors influencing contact angle measurements on wood particles by column wicking M. WÃ¡linder and D.J. Gardner Determination of contact angles on swelling polymer particles by the column wicking method S.Q. Shi and D.J. Gardner PART 4: DYNAMIC EFFECTS IN CONTACT ANGLE MEASUREMENT Determination of peripheral contact angle of sessile drops on solids from the rate of evaporation H.Y. Erbil Analysis of evaporating droplets by using ellipsoidal cap geometry H.Y. Erbil, G. McHale, S.M. Rowan and M.I. Newton Surfactant induced wetting singularities in confined solid-liquid-liquid systems: kinetic and dynamic aspects H. Haidara, L. Vonna and J. Schultz An acoustic technique for the monitoring of dynamic wetting behaviour G. McHale, M.I. Newton, M.K. Banerjee and S.M. Rowan Dynamic contact angle explanation of flow rate-dependent saturation --- pressure relationships during transient liquid flow in unsaturated porous media S.P. Friedman