Read e-book online Applied Surface Thermodynamics, Second Edition (Surfactant PDF

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By A.W. Neumann, Robert David, Yi Zuo

ISBN-10: 0849396875

ISBN-13: 9780849396878

Floor thermodynamics varieties the basis of any significant research of capillarity and wetting phenomena. the second one version of utilized floor Thermodynamics bargains a finished cutting-edge remedy of this serious subject. It presents scholars and researchers with basic wisdom and functional guidance in fixing real-world difficulties concerning the dimension and interpretation of interfacial homes. Containing forty percentage new fabric and reorganized content material, this moment version starts off by way of proposing a generalized Gibbs idea of capillarity, together with discussions of hugely curved interfaces. targeting drop-shape thoughts, the publication discusses liquid-fluid interfacial pressure and its dimension. subsequent, the authors specialise in touch angles with chapters on experimental tactics, thermodynamic versions, and the translation of touch angles when it comes to reliable floor rigidity. The e-book discusses theoretical ways to picking out sturdy floor pressure in addition to interfacial tensions of debris and their manifestations. It concludes by way of discussing drop dimension dependence of touch angles and line rigidity. What’s New within the moment version: fresh growth in Axisymmetric Drop form research (ADSA) photograph processing equipment for drop form research complicated purposes and generalizations of ADSA contemporary experiences of touch perspective hysteresis touch angles on inert fluoropolymers replace online rigidity and the drop measurement dependence of touch angles Exploring a variety of diverse elements of floor technological know-how and its functions, the booklet logically progresses in order that wisdom of prior chapters complements the knowledge of next fabric, but each one bankruptcy is freestanding in order that skilled researchers can speedy seek advice from issues of specific curiosity.

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Additional info for Applied Surface Thermodynamics, Second Edition (Surfactant Science)

Example text

We consider a rigid, insoluble solid with a smooth surface and assume that the two solid–fluid dividing surfaces and the dividing line are governed by fundamental equations of the same form as those for a fluid system. For convenience, we shall introduce the following changes in notation. The bulk phases, previously labeled by the subscripts j or k, will be denoted by the superscripts (s) for the solid phase, (l) for liquid, and (v) for vapor, gas, or second liquid, while the dividing surfaces, previously labeled by the subscripts j, will now be denoted by the double superscripts (sv) for solid–vapor surface, (lv) for liquid–vapor, and (sl) for solid–liquid.

59 and balances the internal forces in 17 Outline of the Generalized Theory of Capillarity a dividing line with the forces external to the line, namely gravity and surface forces, to determine the equilibrium shape of the dividing surfaces meeting at the dividing line. The conditions of mechanical equilibrium at dividing points may be found elsewhere and will not be discussed further [5]. In a manner similar to that used by Gibbs we shall apply the formalism just developed to a dividing line at a solid surface.

If the Helmholtz function is used, then the desired constant pressure within each phase and the composition of the phase can only be obtained indirectly. The next thermodynamic potential, the Gibbs function, is rejected immediately for capillary systems because it requires that each pressure be controlled by a pressure reservoir [79]. This is impossible for a small bubble or drop phase surrounded by another larger fluid phase since it is obvious that the smaller phase does not have a pressure reservoir.

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Applied Surface Thermodynamics, Second Edition (Surfactant Science) by A.W. Neumann, Robert David, Yi Zuo

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