The science of defoaming [electronic resource] : theory, experiment and applications
- Includes bibliographical references and index.
- Some General Properties of Foams Introduction The Structure of Foams Foam Films Processes Accompanying Aging of Foam Summarizing Remarks Experimental Methods for Study of Foam and Antifoam Action Introduction Measurement of Foam Observations With Single Foam Films Air-Water-Oil Pseudoemulsion Films Spreading Behavior of Oils Summarizing Remarks References Oils at Interfaces: Entry Coefficients, Spreading Coefficients, and Thin Film forces Introduction Classical Entry and Spreading Coefficients Generalized Entry Coefficients, Pseudoemulsion Films, and Thin Film forces Mode of Rupture of Pseudoemulsion Films Generalized Spreading Coefficients and Thin Film forces Spreading Behavior of Typical Antifoam Oils at Aqueous Surfaces Non-Equilibrium Effects due to Surfactant Transport Summarizing Remarks References Mode of Action of Antifoams Introduction Antifoam Effects due to Solubilized Oils Effect on Foamability of Mesophase Precipitation in Aqueous Surfactant Solutions Surface Tension Gradients and Theories of Antifoam Mechanism Oil Bridges and Antifoam Mechanism Antifoam Behavior of Emulsified Liquids Inert Hydrophobic Particles and Capillary Theories of Antifoam Mechanism for Aqueous Systems Mixtures of Hydrophobic Particles and Oils as Antifoams for Aqueous Systems Summarizing Remarks References Appendix 4.1: Some Examples of Early Antifoam Patents Concerning Mixtures of Hydrophobic Particles and Oils Effect of Antifoam Concentration on Volumes of Foam Generated by Air Entrainment Phenomenology Statistical Theory of Antifoam Action Summarizing Remarks Appendix 5.1: Effect of Excluded Volume on Antifoam Concentration in A Film Exhibiting Reynolds Drainage References Deactivation of Mixed Oil-Particle Antifoams During Dispersal and Foam Generation in Aqueous Media Introduction Deactivation of Antifoam Effect of Polydimethylsiloxane Oils Without Particles Early Work With Hydrophobed Silica-Polydimethylsiloxane Antifoams Deactivation of Hydrophobed Silica-Polydimethylsiloxane Antifoams By Disproportionation Effect of Oil Viscosity on Deactivation of Hydrophobed Silica-Polydimethylsiloxane Antifoams Deactivation in Other Types of Oil-Particle Antifoams Theories of Foam Volume Growth in Presence of Deactivating Antifoam Summarizing Remarks References Mechanical Methods for Defoaming Introduction Defoaming Using Rotary Devices Defoaming Using Ultrasound Defoaming Using Packed Beds of Appropriate Wettability Summarizing Remarks References Appendix 7.1: Summary of Empirical Studies of Mechanical Defoaming by Rotary Devices Antifoams for Detergent Products Introduction Powders for Machine Washing of Laundry Liquids for Machine Washing of Laundry Machine Dishwashing General Hard-Surface Cleaning Products Summarizing Remarks Appendix 8.1: Examples of Patents Claiming Incorporation of Polysiloxane-Hydrophobed Silica Antifoams in Detergent Powders for Machine Washing of Textiles References Control of Foam in Waterborne Latex Paints and Varnishes Introduction Foam and Antifoam Behaviour Specific Issues Concerning Oil-Based Antifoams Summarizing Remarks References Antifoams for Gas-Oil Separation in Crude Oil Production Introduction Surface Activity at Gas-Hydrocarbon and Gas-Crude Oil interfaces Causes of Foam formation in Gas-Crude Oil Systems Use of Antifoams Summarizing Remarks References Medical Applications of Defoaming Introduction Use of Simethicone Antifoam in Treatment of Gastrointestinal Gas Defoaming of Blood During Cardiopulmonary Bypass Surgery Summarizing Remarks References.
- (source: Nielsen Book Data)
- Publisher's Summary
- In the 20 years since the publication of the author's multi-contributor volume on defoaming, a vast amount of new work has been published and many new insights have been revealed. A cohesive, single-authored book, The Science of Defoaming: Theory, Experiment and Applications provides comprehensive coverage of the topic. It describes the mode of action of antifoams, presenting the relevant theory and the supporting experimental evidence. Beginning with an introductory chapter that discusses the intrinsic properties of foam, the book then describes experimental methods for measuring foam properties important for studying antifoam action and techniques used in establishing the mode of action of antifoams. Since most commercially effective antifoams are oil based, a chapter is devoted to the entry and spreading behavior of oils and the role of thin film forces in determining that behavior. The book reviews the mode of action of antifoams, including theories of antifoam mechanisms and the role of bridging foam films by particles and oil drops. It also addresses issues related to the effect of antifoam concentration on foam formation by air entrainment and the process of deactivation of mixed oil-particle antifoams during dispersal and foam generation. For applications where chemical antifoam use is unacceptable, the text examines mechanical means of defoaming, such as the use of rotary devices and ultrasound. The final chapters consider the application of defoaming in radically different contexts including waterborne latex paints and varnishes, machine washing of textiles, gas-oil separation in crude oil production, and cardiopulmonary bypass surgery. Focusing on the basic science of defoaming, this book presents a balanced view, which also addresses the challenges that may arise for these specific defoaming applications.
(source: Nielsen Book Data)
- Antifoaming agents.
- Publication date
- Peter R. Garrett.
- Surfactant science series ; v. 155
- Also available in print edition.
- Mode of access: World Wide Web.