Download or read book Using Microscale Interfaces to Connect Transport Dynamics Interfacial Mechanics and Coalescence Behavior for a Model Oil dispersant aqueous System written by Matthew Reichert and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Interfacial Transport Reactions and Phase Behavior in Emulsion Systems written by Rebecca Balaj and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex fluids are of increasing interest because of their ability to provide a unique environment for the exploration of interfacial phenomena. Emulsions, which are mixtures of immiscible liquids, allow for separation of reagents whilst simultaneously providing a liquid-liquid interface wherein reactants can be easily transported, and reactions are able to readily occur. Thus, utilizing complex emulsions as dynamic materials is potentially important to understand localized reaction pathways and kinetics in a controllable and predictable manner. However, a significant limitation of fluid droplets for long-term applications is their eventual breakdown over time. Elucidating approaches by which to enhance droplet stability while simultaneously maintaining their reconfigurability and responsive character is therefore essential. This dissertation, thus, exists in three main sections: first, it aims to investigate a surfactant-free gelation pathway to form oil-core hydrogel capsules to stabilize complex droplets; secondly, it examines the non-equilibrium partitioning of amphiphilic surfactants into biphasic emulsions of miscible oils to dynamically and controllably induce phase separation; and, finally, it attempts to explore the reconfigurable complex droplet as a responsive soft material which can be used to easily manipulate chemical reactions at the oil-water interface. One approach to enhanced stabilization of droplets is by encapsulation, where a shell, often a polymer, encases the liquid droplet to prevent coalescence and limit exchange of droplet contents with the continuous phase. A common approach to droplet encapsulation is interfacial polymerization, where monomers dissolved in immiscible phases react to form capsules localized at the interface. Hydrogels, which are composed of crosslinked, charged polymers swollen in water, are highly permeable to molecules in the aqueous phase and would permit the diffusion of surfactants or other analytes to the droplet surface to trigger a response in droplet configuration. In the first major project of this work, we utilized a Pickering complex droplet intermediate to localize hydrogel formation at the droplet-continuous phase interface. Enhanced stability of droplets with both ionically and covalently crosslinked capsules was observed, with a complete spectrum of reconfigurability possible upon addition of droplet-internal fluorosurfactant, Capstone FS-30. The next major work examines the partitioning of surfactant molecules across the droplet oil-water interface. In general, the partitioning of chemicals across interfaces and their subsequent concentration into droplets and coacervates is important in many fields of study, including organic reaction chemistry and in mimicking individual properties of natural systems, such as living cells. When considering partitioning occurring within emulsions, the dynamics and relative concentration of all components--oil, water, and surfactant--are critical to understanding the behavior of non-equilibrium systems. We became interested in the dynamics and degree of surfactant partitioning while examining the behavior of two-component oil droplets in aqueous surfactant. We produced microscale droplets containing two oils, which in bulk at room temperature are miscible in all proportions. Upon preparing this emulsion, we expected that the droplets would remain in a single phase during their lifetime when undergoing micellar solubilization; however, we noticed phase separation occurring within the droplets. To confirm the partitioning of surfactant into these droplets, we developed a protocol for the LCMS analysis of single microscale droplets. Furthermore, we have shown that, upon addition of ionic surfactant, we can controllably and dynamically induce phase separation through various stimuli. In the last major project of this work, we examine reaction rates at oil-water interfaces and within surfactant micelles. Reactions occurring at the interface of immiscible fluids are important for a variety of different fields, largely due to the separation of reagents into distinct phases only to be reacted specifically and controllably at the interface. This allows unique opportunity to tune reaction kinetics, location, and pathways. Studies have previously been conducted observing reaction kinetics at the oil-water interfaces of emulsions, therefore exploring reactions at interfaces in complex droplets should then allow for an even more specific morphology-dependent, tunable reaction environment.
Download or read book Transport Processes at Fluidic Interfaces written by Dieter Bothe and published by Birkhäuser. This book was released on 2017-07-13 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are several physico-chemical processes that determine the behavior of multiphase fluid systems – e.g., the fluid dynamics in the different phases and the dynamics of the interface(s), mass transport between the fluids, adsorption effects at the interface, and transport of surfactants on the interface – and result in heterogeneous interface properties. In general, these processes are strongly coupled and local properties of the interface play a crucial role. A thorough understanding of the behavior of such complex flow problems must be based on physically sound mathematical models, which especially account for the local processes at the interface. This book presents recent findings on the rigorous derivation and mathematical analysis of such models and on the development of numerical methods for direct numerical simulations. Validation results are based on specifically designed experiments using high-resolution experimental techniques. A special feature of this book is its focus on an interdisciplinary research approach combining Applied Analysis, Numerical Mathematics, Interface Physics and Chemistry, as well as relevant research areas in the Engineering Sciences. The contributions originated from the joint interdisciplinary research projects in the DFG Priority Programme SPP 1506 “Transport Processes at Fluidic Interfaces.”
Download or read book Interfacial Mechanics written by Jane Wang and published by CRC Press. This book was released on 2019-12-06 with total page 1005 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the characteristics of material contact and lubrication at tribological interfaces is of great importance to engineering researchers and machine designers. Traditionally, contact and lubrication are separately studied due to technical difficulties, although they often coexist in reality and they are actually on the same physical ground. Fast research advancements in recent years have enabled the development and application of unified models and numerical approaches to simulate contact and lubrication, merging their studies into the domain of Interfacial Mechanics. This book provides updated information based on recent research progresses in related areas, which includes new concepts, theories, methods, and results for contact and lubrication problems involving elastic or inelastic materials, homogeneous or inhomogeneous contacting bodies, using stochastic or deterministic models for dealing with rough surfaces. It also contains unified models and numerical methods for mixed lubrication studies, analyses of interfacial frictional and thermal behaviors, as well as theories for studying the effects of multiple fields on interfacial characteristics. The book intends to reflect the recent trends of research by focusing on numerical simulation and problem solving techniques for practical interfaces of engineered surfaces and materials. This book is written primarily for graduate and senior undergraduate students, engineers, and researchers in the fields of tribology, lubrication, surface engineering, materials science and engineering, and mechanical engineering.
Download or read book Interfacial Transport Phenomena written by John C. Slattery and published by Springer Science & Business Media. This book was released on 2007-04-13 with total page 839 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an extensively revised second edition of "Interfacial Transport Phenomena", a unique presentation of transport phenomena or continuum mechanics focused on momentum, energy, and mass transfer at interfaces. It discusses transport phenomena at common lines or three-phase lines of contact. The emphasis is upon achieving an in-depth understanding based upon first principles. It includes exercises and answers, and can serve as a graduate level textbook.
Download or read book Interfacial Dynamics written by Nikola Kallay and published by CRC Press. This book was released on 2000-01-03 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: An examination of the theoretical foundations of the kinetics and thermodynamics of solid-liquid interfaces, as well as state-of-the-art industrial applications, this book presents information on surface and colloidal chemical processes and evaluates vital analytical tools such as atomic force microscopy, surface force apparatus measurements, and p
Download or read book Interfacial Phenomena written by J.T. Davies and published by Academic Press. This book was released on 2012-12-02 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interfacial Phenomena examines the fundamental properties of various liquid interfaces. This book discusses the physics of surfaces; electrostatic and electrokinetic phenomena; and adsorption at liquid interfaces. The properties of monolayers; reactions at liquid surfaces; diffusion through interfaces; and disperse systems and adhesion are also deliberated. Other topics include the vapor pressures over curved surfaces; electrical capacity of the double layer; applications of electrophoresis; and thermodynamics of adsorption and desorption. The experimental methods of spreading films at the oil-water interface; penetration into monolayers; experiments on dynamic systems; and spontaneous emulsification are likewise covered in this text. This book is beneficial to chemical engineers and students concerned with interfacial phenomena.
Download or read book Fundamentals of Interfacial Engineering written by Robert J. Stokes and published by John Wiley & Sons. This book was released on 1996-12-27 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eine in sich geschlossene, umfassende Einführung in die Grundlagen der Grenzflächenphänomene und ihrer Anwendung auf Prozesse und Produktdesign - geschrieben für Ingenieure aus Chemie, Elektronik und Biomedizin. Zwischenmolekulare Wechselwirkungen an der Grenzfläche werden ausführlich behandelt; Eigenschaften, Verarbeitung und Verhalten fluider Grenzflächen werden ebenso diskutiert wie Ober- und Grenzflächenmerkmale fester Stoffe. Dieses Buch ist relevant für den Praktiker in der Industrie, stellt aber gleichzeitig eine wertvolle Hilfe für Lehrkräfte ingenieurwissenschaftlicher Fachrichtungen bei der Ausbildungsplanung dar.
Download or read book Interfacial Phenomena written by Clarence A. Miller and published by CRC Press. This book was released on 2007-10-08 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the first edition of Interfacial Phenomena, the interest in interfaces and surfactants has multiplied, along with their applications. Experimental and theoretical advances have provided scientists with greater insight into the structure, properties, and behavior of surfactant and colloid systems. Emphasizing equil
Download or read book Interfaces For The 21st Century New Research Directions In Fluid Mechanics And Materials Science written by David Canright and published by World Scientific. This book was released on 2002-05-30 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights some recent advances in interfacial research in the fields of fluid mechanics and materials science at the beginning of the twenty-first century. It is an extension of the presentations made during the conference “Interfaces for the 21st Century,” held on August 16-18, 1999, in Monterey, California. It includes papers by sixteen renowned experts in the field of interfacial mechanics, abstracts contributed by research scientists, and a summary of a panel discussion on future research directions. The book covers experimental and theoretical approaches, with the unifying philosophy being the investigation of new techniques for modeling the dynamics of interfaces. A number of new and exciting solution methods and experimental studies, as well as the physical problems that initiated them, are presented.
Download or read book Fluid Interfaces written by Eduardo Guzmán and published by MDPI. This book was released on 2021-03-02 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid interfaces are promising candidates for confining different types of materials, e.g., polymers, surfactants, colloids, and even small molecules, to be used in designing new functional materials with reduced dimensionality. The development of such materials requires a deepening of the physicochemical bases underlying the formation of layers at fluid interfaces as well as on the characterization of their structures and properties. This is of particular importance because the constraints associated with the assembly of materials at the interface lead to the emergence of equilibrium and features of dynamics in the interfacial systems, which are far removed from those conventionally found in traditional materials. This Special Issue is devoted to studies on the fundamental and applied aspects of fluid interfaces, and attempts to provide a comprehensive perspective on the current status of the research field.
Download or read book Interfacial Mechanics written by Qian Wang and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book discusses "tribological interface" that consists of two solid surfaces in contact with or without fluids in between. This specific type of interface is commonly seen in reality and extremely important in engineering applications. This book is written for engineering researchers and design engineers as well as graduate and senior undergraduate students. Mathematical treatments are tailored to a first degree in engineering often without rigorous descriptions and proofs. It focuses on the basic concepts, mathematic models, numerical solution procedures, major results and their physical meanings, as well as engineering applications"--
Download or read book Interfacial Phenomena and Colloid Stability written by Tharwat F. Tadros and published by Walter de Gruyter GmbH & Co KG. This book was released on 2015-07-01 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this volume is to demonstrate the importance of the fundamental aspects of interfacial phenomena in various industrial applications. The text provides the reader with the knowledge that is essential for the composition of the complex multi-phase systems used in the above mentioned areas of application. It should enable the physical and formulation chemist as well as the chemical engineer in designing the formulation on the basis of a rational approach. It will also enable the formulation scientist to better understanding the factors responsible for producing a stable product with optimum application conditions. The book should also be very useful for teaching the subject of formulation at academic institutions.
Download or read book Interfacial Fluid Dynamics and Transport Processes written by Ranga Narayanan and published by Springer. This book was released on 2014-03-12 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present set of lectures and tutorial reviews deals with various topical aspects related to instabilities of interfacial processes and driven flows from both the theoretical and experimental point of views. New research has been spurred by demands for many applications in material sciences (melting, solidification, electro deposition), biomedical engineering and processing in microgravity environments. This book is intended as both a modern source of reference for researchers in the field as well as an introduction to postgraduate students and non-specialists from related areas.
Download or read book Wettability and Interfacial Phenomena written by Rita Khanna and published by BoD – Books on Demand. This book was released on 2019-05-22 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wettability at the solid/liquid interface, its dynamics, tunability, the influence of operating parameters, surface and interfacial phenomena play an increasingly significant role in a wide variety of applications, for example, material processing, nanotechnology, oil recovery, oil spills, chemical leaching, water management, and disease transmission. Although a mature field, it is experiencing dramatic developments on several fronts with emerging applications in new fields. This book presents a collection of eight chapters on nanoscale wetting phenomena, oil extraction from reservoir rocks, the role of coatings, particle morphology, surface roughness and viscosity in metal processing, and practical applications of superhydrophobic behaviour in cell culturing, isolation, anti-icing, anti-reflective and anti-corrosion coatings in the transportation and optical devices fields.
Download or read book Interfacial Phenomena in Petroleum Recovery written by Norman R. Morrow and published by CRC Press. This book was released on 1990-09-28 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with specialized but interrelated problems in oil recovery in which the effect of interfacial behaviors is the dominant factor. Describes approaches to improving the understanding of the fundamentals of displacement, with the goal of simplifying systems sufficiently to enable measurements and
Download or read book Oil Slick Dispersal Mechanics written by C. A. Osamor and published by . This book was released on 1981 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
