Download or read book Adsorption Kinetics of Polymer surfactant Mixtures at an Expanding Air water Interface written by Anna Angus-Smyth and published by . This book was released on 2013 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract:The dynamic adsorption mechanisms of a range of polymer/surfactant mixtures have been studied at the expanding air/water interface created by an overflowing cylinder. The composition of the adsorption layer from mixed systems is obtained using a new approach, co-modelling ellipsometry data and NR data recorded on only one isotopic contrast, without deuterated polymer. The precision and accuracy of the interfacial compositions using this novel approach match those obtained by NR measurements using multiple isotopic contrasts and deuterated polymer, and exceeds those in the absence of deuterated polymer. For weakly interacting PEO/surfactant mixtures adsorption is competitive, the interfacial composition can be rationalised in terms of competitive adsorption. At high surfactant concentrations polymer adsorption is inhibited by the increasing surfactant coverage, although in PEO/SDS mixtures positive interactions between the two components allow PEO to adsorb until an SDS monolayer is present. For oppositely charged mixtures of PSS and CnTAB surfactants, synergistic adsorption occurs at low surfactant concentrations, and the formation of polymer/surfactant complexes has a marked effect on interfacial adsorption, although polymer adsorption is controlled by free polymer molecules. Aggregation occurs around charge neutrality, the material in these aggregates cannot reach the interface due to their size, and at higher surfactant concentrations polymer can no longer adsorb. Mixtures of PEI/SDS at high pH behave similarly to the PSS/CnTAB systems, with progressive aggregation depleting the system of surface active material and limiting adsorption. However at low pH the aggregates can reach the interface by convection where they spread material across the surface in the form of a thin layer of nanometer thickness by Marangoni flows. This work proves that examination of the dynamic adsorption behaviour of polymer/surfactant systems is invaluable to understanding their adsorption mechanisms. Furthermore there is a clear and incontrovertible link between the dynamic interfacial adsorption and bulk phase behaviour.
Download or read book Adsorption Kinetics of Polymer written by Anna Angus-Smyth and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamic adsorption mechanisms of a range of polymer/surfactant mixtures have been studied at the expanding air/water interface created by an overflowing cylinder. The composition of the adsorption layer from mixed systems is obtained using a new approach, co-modelling ellipsometry data and NR data recorded on only one isotopic contrast, without deuterated polymer. The precision and accuracy of the interfacial compositions using this novel approach match those obtained by NR measurements using multiple isotopic contrasts and deuterated polymer, and exceeds those in the absence of deuterated polymer. For weakly interacting PEO/surfactant mixtures adsorption is competitive, the interfacial composition can be rationalised in terms of competitive adsorption. At high surfactant concentrations polymer adsorption is inhibited by the increasing surfactant coverage, although in PEO/SDS mixtures positive interactions between the two components allow PEO to adsorb until an SDS monolayer is present. For oppositely charged mixtures of PSS and CnTAB surfactants, synergistic adsorption occurs at low surfactant concentrations, and the formation of polymer/surfactant complexes has a marked effect on interfacial adsorption, although polymer adsorption is controlled by free polymer molecules. Aggregation occurs around charge neutrality, the material in these aggregates cannot reach the interface due to their size, and at higher surfactant concentrations polymer can no longer adsorb. Mixtures of PEI/SDS at high pH behave similarly to the PSS/CnTAB systems, with progressive aggregation depleting the system of surface active material and limiting adsorption. However at low pH the aggregates can reach the interface by convection where they spread material across the surface in the form of a thin layer of nanometer thickness by Marangoni flows. This work proves that examination of the dynamic adsorption behaviour of polymer/surfactant systems is invaluable to understanding their adsorption mechanisms. Furthermore there is a clear and incontrovertible link between the dynamic interfacial adsorption and bulk phase behaviour.
Download or read book Mixed Surfactant Systems written by Paul M. Holland and published by . This book was released on 1992 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a broad survey of the properties, behavior, and modeling of mixed surfactant systems, including mixed micellar solutions, phenomena at interfaces, phase behavior, and mixtures with unusual surfactant types. Covers chemical reactions in mixed micelles, approaches to molecular modeling of mixed surfactant aggregates, and new experimental techniques for studying mixed micelles and adsorption on surfaces. Features contributions from leading specialists in colloid and surface science, including Robert S. Schechter, John F. Scamehorn, Milton J. Rosen, Keizo Ogino, and Denver G. Hall.
Download or read book Polymer surfactant Mixtures Confined at the Air water and Solid water Interfaces written by Mauro Moglianetti and published by . This book was released on 2009 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Colloid and Interface Science written by Tharwat Tadros and published by Springer. This book was released on 2013-06-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An authoritative and comprehensive reference relevant to all scientists and engineers in the field. This encyclopedia not only helps chemistry, materials science and physics researchers to understand the principles, but also provides practicing engineers with the necessary information for implementing practical applications, such as Food and agrochemicals Polymers and ceramics Cosmetics and detergents Paints and coatings Pharmaceuticals and drug delivery In addition, the encyclopedia is an important reference for industrial chemists and chemical engineers faced with a multitude of industrial systems of a colloidal nature. As wide as the range of applications that colloid and interface science has is the range of scientific disciplines that contribute to research and development in this field. These encompass chemistry, physics, biology and mathematics as well as nanoscience and nanotechnology. The encyclopedia provides easy-to-digest information for meeting these interdisciplinary challenges. While providing numerous concise definitions of key terms, the encyclopedia also features more than forty in-depth essays on topics ranging from Agrochemical Formulations to Zeta Potential. All entries are cross-referenced and include selected references to original literature as well as synonyms.
Download or read book Issues in Technology Theory Research and Application 2013 Edition written by and published by ScholarlyEditions. This book was released on 2013-05-01 with total page 1219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Technology Theory, Research, and Application: 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Ocean Technology. The editors have built Issues in Technology Theory, Research, and Application: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Ocean Technology in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Technology Theory, Research, and Application: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Polymer Surfactant Mixtures Confined at the Air water and Solid waste Interfaces written by Mauro Moglianetti and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surfactant Adsorption and Surface Solubilization written by Ravi Sharma and published by . This book was released on 1995 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents recent progress in the understanding of competitive adsorption. Describes adsolubilization and adsorption at the solid-liquid interface. Discusses kinetics of adsorption at liquid-liquid interfaces. Examines the structure of adsorbed layers.
Download or read book Surfactant Science and Technology written by Laurence S. Romsted and published by CRC Press. This book was released on 2014-05-05 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surfactant research explores the forces responsible for surfactant assembly and the critical industrial, medical, and personal applications, including viscosity control, microelectronics, drug stabilization, drug delivery, cosmetics, enhanced oil recovery, and foods. Surfactant Science and Technology: Retrospects and Prospects, "a Festschrift in honor of Dr. Kash Mittal," provides a broad perspective with chapters contributed by leaders in the fields of surfactant-based physical, organic, and materials chemistries. Many of the authors participated in a special symposium in Melbourne, Australia, honoring Kash Mittal’s 100th edited book at the 18th Surfactants in Solution (SIS) meeting. Each chapter provides an overview of a specific research area, with discussions on past, present, and future directions. The book is divided into six parts. Part I reviews the evolution of theoretical models for surfactant self-assembly, and introduces a model for interpreting ion-specific effects on aggregate properties. Part II focuses on interactions of surfactant solutions with solid supports; uses contact angles to understand hydrophobic/hydrophilic changes in a lipid layer; uses surface tension to understand molecular arrangements at interfaces; reviews spreading phenomena; discusses pattern formation on solid surfaces; and applies tensiometry to probe flavor components of espresso. Part III discusses novel DNA-based materials, multifunctional poly(amino acid)s–based graft polymers for drug delivery, and polymeric surfactants for stabilizing suspensions and emulsions. Part IV introduces farm-based biosurfactants from natural products and "greener" biosurfactants from bacteria. Part V explores lyotropic liquid crystals and their applications in triggered drug release; microemulsion properties and controlled drug release; the role of hydrotopes in formulations and in enhancing solubilization in liquid crystals; the potential of ionic liquids to generate tunable and selective reaction media; and provides an overview of stimuli-responsive surfactants. Focusing on emulsions, Part VI reviews the design of emulsion properties for various commercial applications, the role of surfactants in the oil and gas industries, and surfactant mechanisms for soil removal via microemulsions and emulsification.
Download or read book Adsorption Mechanisms of Charged Polymeric Surfactants to the Solid water Interface written by Ryan G. Toomey and published by . This book was released on 2002 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surfactants Chemistry Interfacial Properties Applications written by D. Möbius and published by Elsevier. This book was released on 2001-12-21 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides comprehensive material on the chemical and physical attributes of surfactants and new models for the understanding of structure-property relationships. Surfactants Chemistry, Interfacial Properties, Applications provides efficient instruments for the prognostication of principal physicochemical properties and the technologic applicability from the structure of a surfactant through the discussion of interrelations between the chemical structure, physicochemical properties and the efficiency of technologic application. Also included are informative overviews on new experimental techniques and abundant reference material on manufacturers, nomenclature, product properties, and experimental examples. The publication is accompanied by a CD-ROM, which is needed for the application of the thermodynamic and kinetic models to experimental data.
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 Surfactant Aggregation written by John H. Clint and published by Blackie Academic and Professional. This book was released on 1992 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adsorption of Polyelectrolyte surfactant Mictures at the Air water Interface written by Xiao Li Zhang and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer surfactant Interactions at the Air water Interface written by Anna Slastanova and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foam Films and Foams written by Dotchi Exerowa and published by CRC Press. This book was released on 2018-07-27 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes in detail the scientific philosophy of the formation and stabilization-destabilization of foams. It presents all hierarchical steps of a foam, starting from the properties of adsorption layers formed by foaming agents, discussing the properties of foam films as the building blocks of a foam, and then describing details of real foams, including many fields of application. The information presented in the book is useful to people working on the formulation of foams or attempting to avoid or destruct foams in unwanted situations.
Download or read book Polymer Vs Surfactant written by B. R. Postmus and published by . This book was released on 2008 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
