From Simple Solutions To Strongly Structured Microemulsions
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From Simple Solutions To Strongly Structured Microemulsions
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Author : Shih-Yu Tseng
language : en
Publisher: Cuvillier Verlag
Release Date : 2022-12-12
From Simple Solutions To Strongly Structured Microemulsions written by Shih-Yu Tseng and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-12-12 with Science categories.
Microemulsions are known for their versatile properties widely utilized in fundamental research and industrial applications. They are thermodynamically stable mixtures structured on a colloidal length scale with an amphiphilic film separating water- and oil-rich domains. However, recent studies claim the existence of “surfactant-free microemulsions,” which exhibit structures on a molecular length scale. By means of systematic phase behavior and scattering experiments, this dissertation provides deep insights into the pathway from simple solutions to weakly and strongly structured microemulsions. With bulk-contrast SANS, the scattering behavior of a simple solution system made of water, cyclohexane, 1- and 2-propanol was found to be dominated by critical composition fluctuations (Ornstein-Zernike). Further analysis of critical phenomena revealed the critical exponent doubling that follows the scaling law γ ~ “2” ν. On the other hand, weak scattering signals described with a new model were detected in the film-contrast SANS data due to the nearby tricritical point (TCP). After crossing the TCP, the formation of well-defined amphiphilic films was demonstrated by increasing the amphiphilicity of the amphiphile. Subsequently, the influence of modifications of the amphiphilic film by adding novel diblock polymers was studied. As a result, enhanced efficiency and strengthened structural ordering were achieved in typical alkane microemulsions and novel CO2 microemulsions. Finally, the properties of industry-relevant microemulsions were investigated in two application-oriented projects. One project focused on the phase behavior and the microstructure of polyol-rich CO2 microemulsions, which can be used for the polyurethane (PU) foam production with cell sizes of a few micrometers. The other project focused on the formulation of optimum microemulsions stabilized by highly efficient extended surfactants. The experimental parameters from phase behavior studies helped determine the coefficients of the HLD equation, which can serve as a prediction tool for tackling a wide variety of formulation problems. Above all, this doctoral dissertation elucidated the pathway toward structured microemulsions and demonstrated versatile aspects of microemulsions’ applications.
Structure And Dynamics Of Strongly Interacting Colloids And Supramolecular Aggregates In Solution
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Author : Sow-Hsin Chen
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Structure And Dynamics Of Strongly Interacting Colloids And Supramolecular Aggregates In Solution written by Sow-Hsin Chen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
During the last decade, various powerful experimental tools have been developed, such as small angle X-ray and neutron scattering, X-ray and neutron reflection from interfaces, neutron spin-echo spectroscopy and quasi-elastic multiple light scattering and large scale computer simulations. Due to the rapid progress brought about by these techniques, one witnesses a resurgence of interest in the physicochemical properties of colloids, surfactants and macromolecules in solution. Although these disciplines have a long history, they are at present rapidly transforming into a new, interdisciplinary research area generally known as complex liquids or soft condensed matter physics: names that reflect the considerable involvement of the chemical and condensed matter physicists. This book is based on lectures given at a NATO ASI held in the summer of 1991 and discusses these new developments, both in theory and experiment. It constitutes the most up-to-date and comprehensive summary of the entire field.
Neutrons X Rays And Light
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Author : Peter Lindner
language : en
Publisher: Elsevier
Release Date : 2024-12-06
Neutrons X Rays And Light written by Peter Lindner and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-12-06 with Science categories.
This book addresses the possibilities provided by scattering techniques in the study of soft matter. It fills the gap between the fundamental scattering processes, which are described by the general theoretical framework of elastic and quasi-elastic interaction of radiation with matter, and state-of-the-art applications to specific soft matter systems. Three probes are discussed in detail: neutrons, X-ray photons, and visible light. The first part of the book is dedicated to the use of general principles for the measurement and analysis of scattered intensity: elementary scattering process, data reduction, general theorems, the concept of reciprocal space, and its link to structural and dynamical information in direct space. In the second part, methods and techniques are further discussed, including resolution effects, contrast variation, static and dynamic light scattering, quasi-elastic neutron scattering, and reflectometry and grazing incidence techniques. Part three deals with the state of the art of scattering studies of typical soft matter systems (polymers, self-assembled surfactant systems, microemulsions, liquid crystals, colloids, aggregates, biological systems) with dedicated chapters for particle interactions, and modelling. Part four highlights special applications, from turbid media to scattering under external constraints, and industrial applications. This new edition, written by the lecturers of the Bombannes Summer School, will be most useful as a learning tool for masters and PhD students, post-docs, and young researchers moving into the field. As with the previous edition, it will also be a reference for any scientist working in soft matter, where scattering techniques are ubiquitous, used both in small laboratories and at large-scale research facilities. • Provides an understandable and thorough introduction to the fundamentals of scattering in a way that is accessible for students/PhDs.• Offers a comprehensive overview of the main scattering techniques associated with neutrons, X-rays, and light.• Includes chapters on virtually all soft matter systems.• Presents both standard analyses and recent advances in scattering techniques
Microemulsions And Related Systems
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Author : Maurice Bourrel
language : en
Publisher: CRC Press
Release Date : 1988-07-01
Microemulsions And Related Systems written by Maurice Bourrel and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988-07-01 with Science categories.
Microemulsion Systems
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Author : Henri L. Rosano
language : en
Publisher: CRC Press
Release Date : 1987-03-27
Microemulsion Systems written by Henri L. Rosano and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987-03-27 with Science categories.
Surfactants In Solution
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Author : K.L. Mittal
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Surfactants In Solution written by K.L. Mittal and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
This and its companion Volumes 4 and 5 document the proceedings of the 5th International Symposium on Surfactants in Solution held in Bordeaux, France, July 9-13, 1984. This symposium was the continuation of the series of symposia initiated in 1976 in Albany, New Vork under the title ""icellization, Solubilization and "icroemulsions". The next two symposia were labelled "Solution Chemistry of Surfactants" and "Solution Behavior of Surfactants: Theoretical and Applied Aspects" held in Knoxville, TN in 1978 and Potsdam, N. V. in 1980, respectively. In 19B2 at the time of the 4th Symposium in this series, it became amply evident that there was a definite need to have more a generic title to describe these biennial events, and after much deliberation it was decided that an appropriate title would be "Surfactants in Solution" as both the aggregation and adsorption aspects of surfactants were addressed. So the 4th Symposium was held in 1982 in Lund, Sweden, under this new rubric, and it was decided to continue these symposia in the future under this appellation. Naturally, the Bordeaux Symposium was dubbed as the 5th International Symposium on Surfactants in Solution, and our logo became SIS which is very apropos and appealing. It was in Bordeaux that the decision was made to hold the 6th SIS Symposium in New Delhi and it is scheduled for August 18-22, 1986 in the capital of India.
Handbook Of Microemulsion Science And Technology
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Author : Promod Kumar
language : en
Publisher: Routledge
Release Date : 2018-05-02
Handbook Of Microemulsion Science And Technology written by Promod Kumar and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-02 with Science categories.
Demonstrating methods for overcoming stability issues in paints, wax dispersions, cosmetics, food products, and other industrial applications, this reference probes theoretical and practical issues surrounding microemulsion science and technology. Featuring the work of 51 international experts and containing almost 1000 instructive tables, equations, and illustrations, this book reviews the performance of, and prospects for, experimental methods such as X-ray diffraction, transmission electron microscopy (TEM), light scattering, small angle neutron scattering, viscosimetry, and nuclear magnetic resonance (NMR) to characterize various aspects of the dispersed phase of microemulsions.
Micellar Solutions And Microemulsions
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Author : Sow Hsin Chen
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Micellar Solutions And Microemulsions written by Sow Hsin Chen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
During the last decade there has been a renewed interest in research on supramolecular assemblies in solutions, such as micelles and microemulsions, not only because of their extensive applications in industries dealing with catalysts, detergency, biotechnology, and enhanced oil recovery, but also due to the development of new and more powerful experimental and theoretical tools for probing the microscopic behavior of these systems. Prominent among the array of the newly available experimental techniques are photon correlation spectroscopy, small-angle neutron and X-ray scattering, and neutron spin-echo and nuclear magnetic resonance spectroscopies. On the theoretical side, the traditionally emphasized thermodynamic approach to the study of the phase behavior of self-assembled systems in solutions is gradually being replaced by statistical mechanical studies of semi-micro scopic and microscopic models of the assemblies. Since the statistical mechanical approach demands as its starting point the microscopic struc tural information of the self-assembled system, the experimental determina tion of the structures of micelles and microemulsions becomes of paramount interest. In this regard the scattering techniques mentioned above have played an important role in recent years and will continue to do so in the future. In applying the scattering techniques to the supramolecular species in solution, one cannot often regard the solution to be ideal. This is because the inter-aggregate interaction is often long-ranged since it is coulombic in nature and the interparticle correlations are thus appreciable.
Microemulsions Structure And Dynamics
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Author : Stig E. Friberg
language : en
Publisher: CRC Press
Release Date : 2018-01-18
Microemulsions Structure And Dynamics written by Stig E. Friberg and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-18 with Science categories.
This book describes the microemulsion phenomenon in a systematic manner and not only provides an up-to-date introduction to this topic but aslo serves as the basis for further development in the area.The progress of microemulsion research has taken place in well-defined stages. The introduction period was founded on Schulman‘s original discovery and was, as expected, focused on the interfacial free energy. Because Schulman obtained his microemulsions from a macroemulsion by the addition of a cosurfactant.The present stage is characterized by an extensively enhanced knowledge about structure and dynamics in these systems. This has led to the realization that the structure of the microemulsions is related both to solutions with critical behaviour and long range order structures, the lyotropic liquid crystals. These two aspects have been elucidated independently by the French groups and by the Lund Spectroscopy group.
Surfactants Micelles Microemulsions And Liquid Crystals
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Author : Armin Weiss
language : de
Publisher: Springer
Release Date : 1984
Surfactants Micelles Microemulsions And Liquid Crystals written by Armin Weiss and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Science categories.