Download or read book Interfacial Rheology of Macromolecules written by Erik Michael Freer and published by . This book was released on 2004 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interfacial Rheology written by Reinhard Miller and published by CRC Press. This book was released on 2009-06-17 with total page 695 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book on interfacial rheology. It aims to describe both its history as well as the current, most frequently used experimental techniques for studying dilational and shear rheology of layers at liquid/gas and liquid/liquid interfaces. The book opens with a chapter on the fundamentals of interfacial rheology. All (16) contributions i

Download or read book Interfacial Rheology of Globular Proteins written by Aditya Jaishankar and published by . This book was released on 2011 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protein-surfactant mixtures appear in many industrial and biological applications. Indeed, a fluid as vital as blood contains a mixture of serum albumin proteins with various other smaller surface-active components. Proteins and other surface active molecules are often adsorbed at an air-liquid or liquid-liquid interface due to favorable thermodynamics, and these interfaces play a role in such diverse fields as stabilizing foams and emulsions, controlling high speed coatings, the blood clotting process, designing synthetic replacements of biological fluids, etc. It is thus important to understand the interfacial behavior of protein-surfactant mixtures, especially the role it can play in bulk measurements of material properties. A complete description of the dynamics of these multi-component systems is still elusive. In this thesis, a comprehensive study of the rheology of a model globular protein solution is described. In conventional bulk rheological studies of globular protein solutions a yield-like behavior and shear thinning in the viscosity at low shear rates is observed, even for concentrations as low as 0.03% by weight. Typical explanations for this yield stress involve the introduction of long range colloidal forces that are stronger than electrostatic forces, and which stabilize a colloidal structure formed by the protein molecules. However, evidence for this structure from small angle X-ray scattering and small angle neutron scattering is lacking. In the first part of this thesis, it will be shown using interfacial steady and oscillatory shear experiments how the yield-like behavior observed in bulk rheology in fact arises out of a purely interfacial effect. We show that the yield-like behavior and shear-thinning observed in bulk rheology can be modeled by treating the interfacial layer of the adsorbed protein as a pure plastic material that yields at a critical strain. This model also accounts for the geometric dependence seen in bulk rheology experiments. The second part of this thesis investigates the rheological consequences of adding low molecular weight surfactants to globular protein solutions. Because non-ionic surfactants compete for the interface with the protein molecules, the resulting dynamics at the fluid interface can be complex. In addition to steady and oscillatory interfacial shear rheology, a new phenomenon called interfacial creep ringing-a term used to denote the periodic oscillations arising from the coupling between instrument inertia and interface elasticity-arises. It is demonstrated how these damped inertioelastic oscillations can be used to rapidly estimate interfacial viscoelastic moduli and also study the effect of the addition of non-ionic surfactants to globular protein solutions. We show that exploiting the interfacial creep ringing technique is useful as a way to rapidly determine the effects of interfacial viscoelasticity. It is also observed that increasing the concentration of the competing surfactant leads to progressively decreasing ringing frequencies and amplitudes, until visible ringing completely disappears beyond a certain concentration. Finally, we indicate future avenues of work including surface particle tracking to study these complex dynamics of protein surfactant mixtures.

Download or read book Interfacial Rheology written by Reinhard Miller and published by CRC Press. This book was released on 2009-06-17 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book on interfacial rheology. It aims to describe both its history as well as the current, most frequently used experimental techniques for studying dilational and shear rheology of layers at liquid/gas and liquid/liquid interfaces. The book opens with a chapter on the fundamentals of interfacial rheology. All (16) contributions include the theoretical basis for the presented methodologies, and experimental examples are given.

Download or read book Interfacial Flow Processing of Biological Macromolecules written by An Josephine Julia Goffin and published by . This book was released on 2008 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interfacial Transport Processes and Rheology written by Howard Brenner and published by Elsevier. This book was released on 2013-10-22 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is designed to provide the theory, methods of measurement, and principal applications of the expanding field of interfacial hydrodynamics. It is intended to serve the research needs of both academic and industrial scientists, including chemical or mechanical engineers, material and surface scientists, physical chemists, chemical and biophysicists, rheologists, physiochemical hydrodynamicists, and applied mathematicians (especially those with interests in viscous fluid mechanics and continuum mechanics).As a textbook it provides materials for a one- or two-semester graduate-level course in interfacial transport processes. It may also be noted that, while separate practical and theoretical subdivisions of material have been introduced, a kind of cross-emphasis is often stressed: (i) to the academic scientist, or the importance of understanding major applications of interfacial transport; and (ii) to the industrial scientist, of the importance of understanding the underlying theory.

Download or read book Interfacial Rheology of Polymers in the Molten State Experimental and Fundamental Aspects written by Younes El Omari and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work of this thesis deals with the interfacial rheology in shear and in extension of polymeric systems. Initially, we chose to study model systems based on PIB poly (isobutylene) and PDMS poly (dimethylsiloxane). These polymers have the advantage of being liquid at room temperature. For this purpose, a cell for measuring interfacial properties has been developed in our laboratory. It allows to study the surface and interface properties at high temperatures up to 200 °C. Thus, we were able to study the interfacial properties according to the steady and oscillatory regime of these model systems by highlighting the influence of the molar mass and the temperature. These studies were then transposed to semi-crystalline molten polymers such as PEG poly (ethylene glycol) and PCL poly (caprolactone). In a second step, we studied and analyzed the interfacial elongational rheological properties of the model systems, by means of interfacial dilational rheology via the oscillating pendant drop method. In addition, the relaxation of surfaces / interfaces was studied by the "pulse" method and using the capillary breakup extensional rheometer (CaBER). The interfacial rheological quantities in elongation of model systems of different molar masses and under different temperatures were obtained. They were then compared with those measured in shear and analyzed according to the interfacial Trouton ratio. In the last part of the thesis, we have shown that the interfacial shear rheology allows to probe the chemical reaction at the interfaces of a polymeric melt system : PEgMA Poly (Ethylene Grafted Maleic Anhydride) / PDMS-(PropNH2)2, Poly (Dimethyl Siloxane Amino Propyl terminated). In addition, the study of the dynamic interfacial tension allowed the monitoring of the kinetics of the interfacial reaction of the reactive systems of different molar masses and at different temperatures. Finally, the studies of interfacial rheology are very relevant to probe in-situ the interfaces and/or interphases of molten polymer systems. The methodologies thus established and used are very innovative and overcome major scientific and technological barriers.

Download or read book Rheology of Polymer Blends and Nanocomposites written by Sabu Thomas and published by Elsevier. This book was released on 2019-09-08 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rheology of Polymer Blends and Nanocomposites: Theory, Modelling and Applications focuses on rheology in polymer nanocomposites. It provides readers with a solid grounding in the fundamentals of rheology, with an emphasis on recent advancements. Chapters explore potential future applications for nanocomposites and polymer blends, giving readers a thorough understanding of the specific features derived from rheology as a tool for the study of polymer blends and nanocomposites. This book is ideal for industrial and academic researchers in the field of polymer blends and nanocomposites, but is also a great resource for anyone who wants to learn about the applications of rheology. - Sets out the principles of rheology as it is applied to polymer blends and nanocomposites - Demonstrates how rheological techniques are best applied to different classes of nanocomposites - Assesses the opportunities and major challenges of rheological approaches to polymer blends and nanocomposites

Download or read book Molecular Assembly Interfacial Rheology and Foaming Properties of Oligofructose Fatty Acid Esters written by Silvia E. H. J. van Kempen and published by . This book was released on 2013 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Structure and Rheology of Complex Fluids written by Ronald G. Larson and published by OUP USA. This book was released on 1999-01-28 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Structure and Rheology of Complex Fluids describes the microstructures of polymeric, colloidal, amphiphilic, and liquid crystalline liquids, and the relationship between microstructure and mechanical and flow properties. It provides illustrations, practical examples, and worked problems. This book can serve as both a textbook for a graduate course and a research monograph.

Download or read book Fundamental Studies of Interfacial Rheology at Multilayered Model Polymers for Coextrusion Process written by Huagui Zhang and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamental studies have been devoted in this work to probe and modelize the interfacial phenomena at multilayered polymer systems based on two model compatible polymers of PVDF and PMMA with varying molar masses. Linear and nonlinear rheology have been demonstrated to be sensitive to the presence of diffuse interphase triggered from interdiffusion at polymer/polymer interface. Firstly, the interdiffusion kinetics as well as the development of the interphase decoupled to flow as generated at a symmetrical (self diffusion) and an asymmetrical (mutual diffusion) bilayer have been investigated using small-amplitude oscillatory shear measurements. Results were analyzed according to Doi-Edwards theory (tube model) and the effects of annealing factors as well as structural properties on the diffusion kinetics have been studied. The PMMA/PVDF mixtures have been examined to be a couple of weak thermorheological complexity, owning close monomeric friction coefficients of each species in the present experimental conditions. Based on this physics, a new rheological model was developed to quantify the interdiffusion coefficients by taking into account the component dynamics in mixed state and the concept of interfacial rheology. Rheological and geometrical properties of the interphase have been able to be quantified through this model, as validated by scanning electron microscopy coupled with energy dispersive X-ray analysis (SEM-EDX) and transmission electron microscopy (TEM). Secondly, experiments of step strain, startup in simple shear and in uni-axial extension have been carried out on the PMMA/PVDF multilayer structures. An original model was proposed to fit the stress relaxation behavior of multilayer structures and to estimate the relaxation behavior of the interphase. Lack of entanglement at the interface and weak entanglement intensity at the diffuse interphase make them to be subsequently readily to suffer from interfacial yielding even interfacial failure during and after continuous large deformations. Interphase delays the interfacial yielding to a larger external deformation or a higher deformation rate. Besides, elongational properties of the multilayer structures have been shown to be a function of composition as controlled by layer number(interfacial area) and interphase properties (rheology related to entanglement intensity). Finally, the diffuse interphase development coupled to flow in practical coextrusion process has been considered. The compromising result between negative effect of chain orientation and favorable effect of flow on diffusion kinetics gives rise to a broadening interphase after coextrusion. Presence of the diffuse interphase was demonstrated to significantly weaken (or even eliminate) the viscous and elastic instabilities despite of the high rheological contrast. Hence, this work gives guidelines on the key role of the interphase plays in structure-property-processing relationships.

Download or read book Nonlinear Polymer Rheology written by Shi-Qing Wang and published by John Wiley & Sons. This book was released on 2018-01-02 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating latest research results and characterization techniques, this book helps readers understand and apply fundamental principles in nonlinear polymer rheology. The author connects the basic theoretical framework with practical polymer processing, which aids practicing scientists and engineers to go beyond the existing knowledge and explore new applications. Although it is not written as a textbook, the content can be used in an upper undergraduate and first year graduate course on polymer rheology. • Describes the emerging phenomena and associated conceptual understanding in the field of nonlinear polymer rheology • Incorporates details on latest experimental discoveries and provides new methodology for research in polymer rheology • Integrates latest research results and new characterization techniques like particle tracking velocimetric method • Focuses on the issues concerning the conceptual and phenomenological foundations for polymer rheology • Has a companion website for readers to access with videos complementing the content within several chapters

Download or read book Emulsions Structure Stability and Interactions written by Dimiter N. Petsev and published by Elsevier. This book was released on 2004-10-14 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emulsions: Structure, Stability and Interactions is the perfect handbook for scientists looking to obtain up-to-date knowledge about the fundamentals of emulsion science, and those looking to familiarize themselves with the subject in greater detail. As a 'stand-alone' source of information, it is also ideal for solving the practical issues encountered daily in the field of emulsion science. While each chapter presents a concise review on a specific topic, the book offers a consistent presentation of the important physical concepts relevant to emulsions. Some of the topics covered include statistical mechanics of fluid interfaces, the structure of fluid interfaces determined by neutron scattering, hydrodynamic interactions and stability of emulsion films, theory of emulsion flocculation, coalescence kinetics of Brownian emulsions, and Brownian dynamics simulation of emulsion stability. - Full and comprehensive presentations - Rigorous approach to each topic, providing in-depth information - Acts as a 'stand-alone' source of information

Download or read book Multiphase Polymer Systems written by Andreea Irina Barzic and published by CRC Press. This book was released on 2016-09-19 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase morphology in multicomponent polymer-based systems represents the main physical characteristic that allows for control of the material design and implicitly the development of new plastics. Emphasizing properties of these promising new materials in both solution and solid phase, this book describes the preparation, processing, properties, and practical implications of advanced multiphase systems from macro to nanoscales. It covers a wide range of systems including copolymers, polymer blends, polymer composites, gels, interpenetrating polymers, and layered polymer/metal structures, describing aspects of polymer science, engineering, and technology. The book analyzes experimental and theoretical aspects regarding the thermal and electrical transport phenomena and magnetic properties of crucial importance in advanced technologies. It reviews the most recent advances concerning morphological, rheological, interfacial, physical, fire-resistant, thermophysical, and biomedical properties of multiphase polymer systems. Concomitantly the book deals with basic investigation techniques that are sensitive in elucidating the features of each phase. It also discusses the latest research trends that offer new solutions for advanced bio- and nanotechnologies. Introduces an overview of recent studies in the area of multiphase polymer systems, their micro- and nanostructural evolutions in advanced technologies, and provides future outlooks, new challenges and opportunities. Discusses multicomponent structures that offer enhanced physical, mechanical, thermal, electrical, magnetic, and optical properties adapted to current requirements of modern technologies. Covers a wide range of materials, such as composites, blends, alloys, gels and interpenetrating polymer networks. Presents new strategies for controlling the micro- and nanomorphology and the mechanical properties of multiphase polymeric materials. Describes different applications of multiphase polymeric materials in various fields, including automotive, aeronautics and space industry, displays, and medicine.

Download or read book Aerated Foods written by Ganesan Narsimhan and published by John Wiley & Sons. This book was released on 2019-06-07 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the roles aeration can play in the production, stability, and consumer experience of foods Aeration is an increasingly prevalent part of food manufacturing, bringing a light texture, enhanced appearance, and richer flavors to a wide range of products. Essential to the creation of everything from ice cream and popcorn to cheese and beer, the incorporation of fine air bubbles into the foods we consume can also boost satiety and thus reduce calorific intake. Aerated Foods examines this process in detail, offering a complete overview of all aspects of aeration. With sections that address the effects of aeration upon product structure and stability, this informative book explains how food formulation influences the shelf life, texture, and overall experience of different foods. Chapters also outline the various methods by which aeration can be achieved, breaking down the science and technology involved in the incorporation of air Details the mechanisms and overall results of aeration as a method of food processing Covers innovative and experimental aeration techniques Looks at the role of aeration in baking Aerated Foods provides food scientists, researchers, and product developers with an invaluable guide to this multifaceted and fast-growing method of food production.

Download or read book Handbook of Hydrocolloids written by Glyn O. Phillips and published by Woodhead Publishing. This book was released on 2020-11-06 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Hydrocolloids, Third Edition is a must-have substantive reference on hydrocolloids, helping food industry scientists ever since its first edition was published and well received. This thoroughly updated and expanded edition reviews the structure, function, properties, and applications of a broad range of hydrocolloids used in food and related industries. The third edition updates existing chapters on developments and theories on the structure and functional characteristics of individual hydrocolloids. The book provides additional chapters on new techniques for the chemical and physicochemical characterization of hydrocolloids, and applications technologies for encapsulation and controlled release of active compounds. Edited by two leading international authorities in the field, this third edition continues to be relevant to food industry researchers, food manufacturers, graduate and postgraduate students, particularly in food, pharmaceutical, and cosmetic sciences. - Introduces to food hydrocolloids considering regulatory aspects and functional characteristics - Examines the manufacture, structure, function, and applications of over twenty-five hydrocolloids - Brings a detailed overview of the function of hydrocolloids as emulsifiers, rheological modifiers, film formers, and encapsulation agents

Download or read book Food Emulsions written by David Julian McClements and published by CRC Press. This book was released on 2004-12-16 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Food Emulsions: Principles, Practice, and Techniques, Second Edition introduces the fundamentals of emulsion science and demonstrates how this knowledge can be applied to better understand and control the appearance, stability, and texture of many common and important emulsion-based foods. Revised and expanded to reflect recent developments, this s