Apparent and Microscopic Contact Angles

ISBN-13: 9789067643214 / Angielski / Twarda / 2000 / 522 str.

J. Drelich; J. S. Laskowski; K. L. Mittal

Opis

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.

Spis treści

Part 1: Nanoscopic and Molecular Effects on Contact Angles 1. Measurement of contact line tension by analysis of the three-phase boundary with nanometer resolution 2. Nanometer resolution of liquid surface topography by scanning force microscopy 3. Instability of the three-phase contact region and its effect on contact angle relaxation 4. Molecular mechanisms of hydrophobic transitions 5. Wetting of SiO2 surfaces by phospholipid dispersions 6. Wettability and microstructure of polymer surfaces: Stereochemical and conformational aspects 7. Contact angles on quartz induced by adsorption of heteropolar hydrocarbons Part 2: Surface Forces and Surface Free Energy 8. Determination of the acid-base properties of metal oxide films and of polymers by contact angle measurements 9. Acid-base surface free energies of solids and the definition of scales in the Good–van Oss–Chaudhury theory 10. The gap between the measured and calculated liquid-liquid interfacial tensions derived from contact angles 11. Effect of an external radiofrequency electric field on the surface free energy components of calcium carbonate in the presence of cationic and anionic surfactants 12. AFM measurements of hydrophobic forces between a polyethylene sphere and silanated silica plates — the significance of surface roughness 13. Self-organization in unstable thin liquid films: dynamics and patterns in systems displaying a secondary minimum Part 3: Wetting of Heterogeneous, Rough and Curved Surfaces 14. Underwater captive bubble technique on curved surfaces of blended polydimethylsiloxanes 15. Thermodynamic equilibrium and stability of liquid films and droplets on fibers 16. Estimation of contact angles on fibers 17. Evolution of surface chemistry and physical properties during thin film polymerization of thermotropic liquid crystalline polymers 18. The combined effect of roughness and heterogeneity on contact angles: The case of polymer coating for stone protection 19. Microsphere tensiometry to measure

O autorze

Mittal, Kash L.; Drelich, J.; Laskowski,,