The book opens with a description of the professional and personal life of professor good, followed by 62 papers divided into four. Measuring advancing and receding contact angle with the tilting stage assmebly tilting stage control interface vca optima software calculates asymmetrical drop image with accuracy. Approximation to wearing conditions for measuring the contact angle on contact lenses, we have developed a sample holder which simulates the curvature of the eye. Dynamic contact angles, wettability and capillary suction of hydrophobic porous materials 193 despite the success in offering insight into the wettability and spreading phenomena, youngs equation has been subject of considerable controversy and discussion. Finally, analysis of the spreading dynamics on the nonwettable surfaces shows that it conforms to the cassiebaxter regime only partial liquidsolid contact is maintained. The degree of wetting wettability is determined by a force balance between adhesive and cohesive forces. How a solid and a liquid interact in terms of wetting and adhesion strongly depends on the solids surface free energy sfe. In this study, microwave plasma was used to treat the surface of pinus yunnanensis wood under the conditions of 220 v of input voltage, 20. The theory of the contact angle of pure liquids on solids, and of the determination of the surface free energy of solids. Advances in contact angle, wettability and adhesion, volume 4. Both fractional and mixed wettability imply that wettability can vary at the pore micron scale.
Dynamic contact angle on a surface with gradient in. Since the first symposium, held in 1992, there had been tremendous research activity on many ramifications of wettability phenomena. Contact angle is used to measure cleanliness, the effects of surface treatments, adhesiveness, repellency. This volume contains a total of 33 papers, which were all pro. The interactions between the fibrinogen probes and modified ldpe surfaces again exhibited a steplike response to wettability fig. A small contact angle indicates good wetting and, at the same time, suggests a low adhesion of contaminating lipids. Its predecessor volumes 1 and 2 were published in 20 and 2015, respectively. An introduction to wettability of oil reservoirs petrophysics and surface chemistry group. It quantifies the wettability of a solid surface by a liquid via the young equation. Contact angle is related both to surface tension and to thermodynamic equilibrium between phases, it is analyzed to measure the wettability of surfaces. The wettability of a particular solid coating, substrate or pigment on a surface is a key to its effectiveness, as wetting is important to adhesion as well as to the prevention of surface defects such as craters, dewetting and crawling. Published september 30, 2009 by crc press 400 pages.
Surface wettability, surface free energy, and surface. This method provides an alternative to contact angle measurements through a contact angle meter for powders less. The angle is governed by the interfacial tensions between those three phases, and is expressed by the youngs equation, as. The results indicate that even for a single liquid there is no universal expression to relate contact angle with contact line speed. Contact angle hysteresis advances in chemistry acs. Modeling dynamic wettability alteration effect based on.
The information gathered from these tests is crucial to building an effective cleaning, treatment and adhesion process. Salapare iii and others published contact angle wettability and adhesion find, read and cite all the research you. A given system of solid, liquid, and vapor at a given temperature and pressure has a unique equilibrium contact angle. It should be underscored that in the last years there has been. Contact angle dynamics in droplets impacting on flat. This is the third volume in the series advances in contact angle, wettability and adhesion initiated to consolidate information and provide commentary on certain recent research aspects dealing with this important topic. Contact angle, wettability and adhesion stevens institute of technology, hoboken, new jersey, july 15, 2016 symposium history and motiviation in his opening remarks at the first symposium in this series professor robert good pointed out that galileo in the 17th century was quite likely the first investigator to observe contact. Wetting is the ability of a liquid to maintain contact with a solid surface, resulting from intermolecular interactions when the two are brought together.
Proposed astm standard will ease the pain of manufacturers. Currently, there is tremendous research activity in rendering surfaces superhydrophobic. He is the editor of more than 110 books dealing with adhesion measurement, adhesion of polymeric coatings, polymer surfaces, adhesive joints, adhesion promoters, thin films, polyimides, surface modification, surface cleaning, and surfactants. This volume chronicles the proceedings of the 5th international symposium on contact angle, wettability and adhesion, toronto, canada, june 2006. It quantifies the wettability of a solid surface by a liquid via the young. Contact angle, wettability and adhesion, volume 6 by kash l. Relationships between water wettability and ice adhesion. Dynamic contact angles, wettability and capillary suction. Surface free energy and surface tension determination. Advances in contact angle, wettability and adhesion. International symposium on contact angle, wettability and adhesion 3rd. Youngs equilibrium contact angle on rough solid surface.
Dsa100, dsa30, dsa25, msa, mobiledrop wilhelmy plate method. The topic of wettability measured in terms of contact angle is of tremendous interest from both fundamental and applied points of view, wettability plays an essential role in many industrial. The contact angle is the angle, conventionally measured through the liquid, where a liquidvapor interface meets a solid surface. For fine powders, a surface tensiometer can be adapted for powder contact angle measurements with the appropriate attachments. Contact angle, wettability, and adhesion acs publications. Its predecessor volumes 1, 2 and 3 were published in 20, 2015 and 2018 respectively. Contact angle, wettability and adhesion, volume 5 taylor.
This symposium was held to provide a forum to update and consolidate the. Universal analysis of wettability and adhesion dsa100. The water droplets on the clays left form a high contact angle with the illitic claysimplying oil. In the last years there has been an explosive interest. To learn more about surface energy and contact angle, view this pdf file. Thats what portable and inline contact angle testing brings to manufacturers. The theoretically predicted minimum in the curve of receding contact angle vs. Contact angle, wettability and adhesion, volume 6 1st edition by kash l. The topic of wettability measured in terms of contact angle is of tremendous interest from both fundamental and applied points of view, wettability plays an essential role in many industrial processes, so an understanding of factors dictating wettability and how to modulate it is of paramount importance.
Contact angle, wettability and adhesion, volume 2 taylor. This book chronicles the proceedings of the symposium on contact angle, wettability and adhesion held in honor of professor robert j. Wettability studies usually involve the measurements of contact angle ca, which indicates the degree of wetting when a solid and liquid interact. The contact angle is measured using the image of a sessile drop at the points of intersection threephase contact points between the drop contour and the projection of the surface. In this work we examine the relationships between water wettability and ice adhesion strength on nominally smooth bare and coated steel discs. Considering a droplet deposited on a horizontal surface, it can be defined contact angle the angle formed by the liquidgas interface with respect to the solid. Determination of contact angle from contact area of liquid droplet spreading on solid substrate derrick o. Advances in contact angle, wettability and adhesion, volume 1. The contact angle can also be related to the work of adhesion via the. Request pdf advances in contact angle, wettability and adhesion, volume 001 introduction origins of the ca hysteresis modeling wettingdewetting in.
The measurement of the contact angle is based on the washburn equation and the application of a highresolution scale. The role of surface chemistry in adhesion and wetting of. Abstract this paper presents a dynamic wettability alteration model based on the gibbs adsorption isotherm equation. In the last years there has been an explosive interest in superhydrophobic surfaces i. Advances in contact angle, wettability and adhesion wiley online. Water contact angles have been used to estimate surface cleanliness before and after cleaning operations, ease of wettability of surfaces. Even a cursory glance at the literature show that in recent years the interest in understanding and controlling wetting behavior has grown exponentially. The microwave plasma presented very significant treatment effects on the treated surface. Surface wettability and absorbency of sheeted materials. Wettability is of pivotal importance in many and varied arenas, ranging from mundane to microand nanofluidics to lithography to biomedical. Electronic books conference papers and proceedings congresses.
Pdf contact angle wettability and adhesion researchgate. Surface energies of some flurocarbon surfaces from contact angle measurements. This volume documents the proceedings of the second international symposium on contact angle, wettability and adhesion held in newark, nj, june 2123, 2000. This is the fourth volume in the series advances in contact angle, wettability and adhesion initiated to consolidate information and provide commentary on certain recent research aspects dealing with this important topic. Techniques for determining contact angle and wettability. Effects of surface wettability and contact time on protein.
Contact angle, wettability and adhesion, volume 6 1st. A new astm international standard uses contact angle measurements to determine the wettability of coatings. This book is the second volume in the series contact angle, wettability and adhesion. Contact angle measurements indicate with brutal precision how clean and ready for bonding, coating, printing, painting, or sealing a surface is. Relation of the equilibrium contact angle to liquid and solid constitution w. The force acting in the tensile direction when moving a. This volume chronicles the proceedings of the 5th international symposium on contact angle, wettability and adhesion toronto, canada, june 2006.
Good at the american chemical society meeting in san francisco, 610 april 1992. Contact angle, wettability and adhesion ebook, 2009. Gumus 32 solidvapour and liquidvapour interfacial tensions which measure the free energy per unit area. Contact angle is an invaluable metric for understanding material surface properties adhesion, wettability, and solid surface free energy. The model is conceptually and thermodynamically developed for ideal surfactant solutions i. Final program tenth international symposium on contact angle, wettability and adhesion stevens institute of technology, hoboken, new jersey, usa, july 15, 2016 symposium history and motiviation in his opening remarks at the first symposium in this series professor robert good pointed out that galileo in the 17th. Contact angle, wettability and adhesion, volume 3 crc. Zisman, relation of the equilibrium contact angle to liquid and solid constitution, in contact angle, wettability, and adhesion, advances. Determination of contact angle from contact area of liquid. Contact angle, wettability, and adhesion volume 43 by gould, r f ed and a great selection of related books, art and collectibles available now at. The free vitalsource bookshelf application allows you to.
761 165 230 258 1187 976 1108 1252 329 316 335 979 800 695 605 425 319 1436 1110 382 1413 1164 372 302 1119 1008 190 1158 1319 150 760 96 956 325 1058 453 861 1325