1st Edition

Contact Angle, Wettability and Adhesion, Volume 2

Edited By Kash L. Mittal Copyright 2002

    This volume documents the proceedings of the Second International Symposium on Contact Angle, Wettability and Adhesion held in Newark, NJ, June 21-23, 2000. Since the first symposium, held in 1992, there had been tremendous research activity on many ramifications of wettability phenomena. This volume contains a total of 33 papers, which were all properly peer reviewed, revised and edited before inclusion. Therefore, this book is not merely a collection of unreviewed manuscripts, but rather represents information which has passed peer scrutiny. Furthermore, the authors were asked to update their manuscripts, so the information contained in this book should be current and fresh. The book is divided into three parts: 1) General Papers; 2) Contact Angle Measurements / Determination and Solid Surface Free Energy; and 3) Wetting and Spreading: Fundamental and Applied Aspects. The topics covered include: various factors influencing contact angle measurements; various ways to measure contact angles; contact angle hysteresis; microscopic studies of static and dynamic contact angles; monitoring surface properties by contact angle measurements; contact angle measurements on various materials (smooth, rough, porous, heterogeneous); microtensiometry to determine contact angles on individual particles; surface free energy determination of various polymeric materials via contact angle measurements; factors influencing wetting and spreading phenomena; dewetting kinetics; wetting properties of wood, coal, paper, human skin and optoelectronic materials; droplet deposition on fibers; electrowetting; and relation between wettability and adhesion. This volume represents a commentary on the current R&D activity in this arena and it should – together with its predecessor (Volume 1) – be of great value and interest to anyone interested in this topic.

    Preface; Part 1: General Papers Role of the water-air interface in determining the surface tension of aqueous solutions of sugars, polysaccharides, proteins and surfactants ; The effect of the acid-base chemistry of lactose on its adhesion to gelatin capsules: Conclusions from contact angle measurements and other surface chemical techniques ; The evaluation of surface free energy of polymers: The role of water acid-base properties and the measurement of an “equilibrium” contact angle ; Hydrophobic mechanochemical treatment of metallic surfaces; Surface rearrangements of polymeric materials containing fluorinated chains as studied by contact angle and other methods; Surface properties of fatty amines as revealed by contact angle, FTIR, and AFM measurements; Modification of E-glass fibre surfaces with aqueous,non-ionic silane solutions; Tetralin and ammonia plasma treatment of ultra-high-strength polyethylene fibers for improved adhesion to epoxy resin; Part 2: Contact Angle Measurements / Determination and Solid Surface Free Energy; Determination of contact angles in different size pores in a porous material; Contact angles on heterogeneous coal surface: The effect of mineral matter; Microsphere tensiometry to determine contact angles on individual particles; Factors influencing the determination of wood contact angles and wettability - extractives contamination, wicking, and bulk sorption effects; A study of contact angles on optoelectronic materials; Contact angle relaxation for ethoxylated alcohol solutions on hydrophobic surfaces; Contact angle hysteresis due to a film present behind the drop; Water contact angles and hysteresis on polyamides; Surface free energies of cellulose ether films; Uncured silicone sealant surface energy as determined; Surface energy and surface roughness changes produced by irradiating polymers with ultraviolet-ozone; Part 3: Wetting and Spreading: Fundamental and Applied Aspects; Dynamic contact line with disjoining pressure, large capillary numbers, large angles and pre-wetted, precursor, or entrained films; Determination of contact line tension from nanoscale liquid surface; Topographies; On the effective equation to describe the spreading of a small viscous drop over a rough surface; Wetting behaviour on a solid surface contaminated with a liquid layer; Wetting and dewetting kinetics of shear-thinning liquids; Evaluation of wetting properties of powders from low pressure gas adsorption experiments; The spreading of alkyl ketene dimers (AKD) in paper and on smooth hydrophilic substrates; The wetting properties of human skin; Wetting of solids by binary surfactant solutions: Synergistic effect ; Measurement of droplet deposition on fibers; Electrowetting on silicon single-crystal substrates; Specific characteristics of wetting and spreading at high Temperatures; Wettability and adhesion of bilayer-forming lipids onto polymeric films; Effect of electrical potential on adhesion, spreading and detachment of organic droplets at an aqueous electrolyte/metal interface


    Kash L. Mittal