Author: Michael Georgiou AntoniadesPublisher:
ISBN:
Category :
Languages : en
Pages : 332
Book Description
Kinetic Studies of Surfactants at the Air-water Interface
Author: Michael Georgiou AntoniadesPublisher:
ISBN:
Category :
Languages : en
Pages : 332
Book Description
Encyclopedia of Colloid and Interface Science
Author: Tharwat TadrosPublisher: Springer
ISBN: 9783642206641
Category : Technology & Engineering
Languages : en
Pages : 0
Book Description
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.
Desorption Rate Studies of Surfactants at the Air-water Interface
Author: John G. SchmittThe Absorption Kinetics of Nonionogenic Surfactants at the Water/air Interface
Author: M. J. SchwugerSurfactants: Chemistry, Interfacial Properties, Applications
Author: D. MöbiusPublisher: Elsevier
ISBN: 0080542131
Category : Science
Languages : en
Pages : 679
Book Description
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.
Fluid Interfaces
Author: Eduardo GuzmánPublisher: MDPI
ISBN: 3039436333
Category : Science
Languages : en
Pages : 232
Book Description
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.
Adsorption Kinetics of Polymer/surfactant Mixtures at an Expanding Air/water Interface
Author: Anna Angus-SmythPublisher:
ISBN:
Category : Polymers
Languages : en
Pages : 252
Book Description
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.
Scientific and Technical Aerospace Reports
Author: Surfactants
Author: Bob AveyardPublisher: Oxford University Press
ISBN: 0192563750
Category : Science
Languages : en
Pages : 400
Book Description
Surfactants... today you have probably eaten some, or rubbed others on your body. Plants, animals (including you) and microorganisms make them, and many everyday products (e.g. detergents, cosmetics, foodstuffs) contain them. Surfactant molecules have one part which is soluble in water and another which is not. This gives surfactant molecules two valuable properties: 1) they adsorb at surfaces (e.g. of an oil droplet in water), and 2) they stick together (aggregate) in water. The aggregates (micelles) are able to dissolve materials not soluble in water alone, and adsorbed surfactant layers, at the surfaces of particles or (say) oil droplets in water, stop the particles or drops sticking together. This is why stable emulsions such as milk do not separate into layers. This book treats the basic physical chemistry and physics underlying the behaviour of surfactant systems. In this book, you will first learn about some background material including hydrophobic hydration, interfacial tension and capillarity (Section I). Discussion of surfactant adsorption at liquid/fluid and solid/liquid interfaces is given in Section II, and includes thermodynamics of adsorption, dynamic and rheological aspects of liquid interfaces and the direct characterisation of surfactant monolayers. In Section III, a description is given of surfactant aggregation to give micelles, lyotropic liquid crystals, microemulsions and Winsor systems. There follows a discussion of surface forces and the way they confer stability on lyophobic colloids and thin liquid films (Section IV). Various dispersions stabilised by adsorbed surfactant or polymer (including solid in liquid dispersions, emulsions and foams) are considered in Section V. The wetting of solids and liquids is explored in Section VI. Like surfactants, small solid particles can adsorb at liquid/fluid interfaces, form monolayers and stabilise emulsions and foams. Such behaviour is covered in Section VII. It is assumed the reader has a knowledge of undergraduate physical chemistry, particularly chemical thermodynamics, and of simple physics. Mathematics (elementary algebra and calculus) is kept at a level consistent with the straightforward derivation of many of the equations presented.
Specific Ion Effects
Author: Werner KunzPublisher: World Scientific
ISBN: 9814271586
Category : Medical
Languages : en
Pages : 347
Book Description
Specific ion effects are important in numerous fields of science and technology. This book summarizes the main ideas that came up over the years. It presents the efforts of theoreticians and supports it by the experimental results stemming from various techniques.