Formation Kinetics of Microemulsions: The Influence of Amphiphilic Additives PDF Download
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Author: Carola Harbauer
Publisher:
ISBN: 9783843927178
Category :
Languages : en
Pages : 432
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Author: Carola Harbauer
Publisher:
ISBN: 9783843927178
Category :
Languages : en
Pages : 432
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Book Description
Author: Helge F. M. Klemmer
Publisher:
ISBN: 9783954045587
Category :
Languages : en
Pages : 273
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Book Description
Author: Maurice Bourrel
Publisher: Editions TECHNIP
ISBN: 9782710809562
Category : Emulsions
Languages : en
Pages : 416
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Book Description
Beginning with P.A. Winsor's fundamental hypothesis on a natural interfacial curvature depending on the values of the formulation variables, this unique book shows scientists how to understand the intrinsic structure of these complex systems and their corresponding physical properties... predict how a change in one formulation variable (surfactant structure, oil structure, aqueous phase composition, temperature, etc.) will modify the microemulsion... and systematically formulate microemulsions for individual applications.This book provides a thermodynamic analysis supporting the existence of natural interfacial curvature... compares the behavior of commercial surfactant mixtures and pure isomeric surfactant molecules in order to point out differences and similarities highly significant for various uses... explains how micelles can evolve smoothly and continuously toward solutions containing large quantities of oil and water... gives procedures for fixing quantitative relationships among formulation variables... plus much more.Illustrated with more than 200 diagrams, tables, and photographs, and completely referenced, this superb volume is essential reading for surfactant, colloid, and physical chemists in both academe and industry, as well as chemical engineers, biotechnologists, and petroleum engineers.Contents: 1. The R-Ratio. 2. Aqueous solutions containing amphiphiles. 3. Nonpolar solutions containing amphiphiles. 4. The phase behavior and properties of solutions containing amphiphiles, organic liquids, and water: micellar solutions. 5. Methods for promoting phase changes. 6. Compensating changes between formulation variables. 7. Solubilization. 8. Thermodynamics of solubilized systems.
Author: Monzer Fanun
Publisher: CRC Press
ISBN: 1420089609
Category : Science
Languages : en
Pages : 568
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Book Description
The effective use of microemulsions has increased dramatically during the past few decades as major industrial applications have expanded in a variety of fields. Microemulsions: Properties and Applications provides a complete and systematic assessment of all topics affecting microemulsion performance and discusses the fundamental characteristics, t
Author: Surinder Mehta
Publisher: LAP Lambert Academic Publishing
ISBN: 9783843391627
Category :
Languages : en
Pages : 196
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Book Description
The dynamics of nanometer sized water droplets have attracted a great deal of attention in recent years. The model system for such studies is water-in-oil (w/o) microemulsion, comprising of water droplets in a non-polar fluid and stabilized by the surfactant. One of the aspects in current research on microemulsion concerns the high solubilization of additives and green synthesis in microemulsion media. The effect of solubilized additives on the microemulsion varies according to the structures of the components. Such changes, however, are often greater than those found in aqueous solutions. Therefore, due care must be exercised in evaluating the effects of even small additions on the aggregation characteristics of surfactants in aqueous solvents. This book is a comprehensive reference that describes microemulsion as a media for solubilization and synthesis. The information is important for better understanding of chemistry and mechanics of organic catalysis, as a probe for studying the mechanistic aspects of many reactions, and as a route to improve yields in reactions of academic interest.
Author: Yvonne Pütz
Publisher: Cuvillier Verlag
ISBN: 3736980426
Category : Science
Languages : en
Pages : 220
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Book Description
Improved building insulation is an important part of today´s efforts on energy saving. Here, nano-insulation materials promise especially low thermal conductivity. Therefore, an easy and cost-efficient production of these materials is an aim of present material research. One approach towards these materials is the expansion and fixation of polymerisable microemulsions of supercritical blowing agents. However, the nano-sized bubbles are found to undergo undesired coarsening processes. In order to reduce the increasing interfacial tension emerging during expansion and therewith the coarsening it was suggested to add low-molecular hydrophobic substances to the supercritical microemulsion. And indeed, the addition of cyclohexane to a microemulsion of the type brine – CO2 – fluorinated surfactants was found to reduce the fluorinated surfactant content – a measure for the interfacial tension - considerably. In this work a systematic small-angle neutron scattering (SANS) contrast variation was performed and the data were analysed by model-independent Fourier analysis. It was found that a concentration gradient of cyclohexane inside the CO2/cyclohexane microemulsion droplets forms. Interestingly, the analysis reveals a depletion zone close to the amphiphilic film which presumably develops due to the known repulsive interactions of cyclohexane and the fluorinated surfactant tails. Using a specially designed high pressure SANS cell to perform stroboscopic pressure jumps, the influence of cyclohexane on pressure-induced elongation of microemulsion droplets as well as the early state of foaming after expansion was studied. Here, the pressure-dependent thermodynamic stability of such microemulsions allows for a fast repeatability of the pressure cycles. It turned out that cyclohexane systematically slows down the structural changes in all processes. Parallel pressure jump experiments with poly-(N-isopropylacrylamide) (PNIPAM) particles revealed that hydration and dehydration kinetics can be studied with the same experimental setup. The first kinetic experiments which combine a CO2-microemulsion mixed with PNIPAM particles indicate that PNIPAM acts as a stabiliser for the microemulsion and further reduces the thermodynamic driving force of the demixing process.
Author: Setareh Maleknia
Publisher: Cuvillier Verlag
ISBN: 373694912X
Category : Science
Languages : en
Pages : 216
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Book Description
Combustion of water-containing diesel fuels results in a simultaneous reduction of soot and NOx-emissions, i.e. they partially avoid the so-called soot-NOx trade-off. In the frame of the present work new temperature invariant, highly efficient fuel microemulsions of the type water/antifreeze – diesel fuel - oleic acid/monoethanolamine/oleic acid diethanolamide containing up to 24 wt.% water with appropriate physical characteristics for commercial applications were formulated. As unexpected reward of the investigations on formulation of microemulsion fuels, novel water-in-fuel nanoemulsions (
Author: Seid Mahdi Jafari
Publisher: Academic Press
ISBN: 0128118393
Category : Technology & Engineering
Languages : en
Pages : 665
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Book Description
Nanoemulsions: Formulation, Applications, and Characterization provides detailed information on the production, application and characterization of food nanoemulsion as presented by experts who share a wealth of experience. Those involved in the nutraceutical, pharmaceutical and cosmetic industries will find this a useful reference as it addresses findings related to different preparation and formulation methods of nanoemulsions and their application in different fields and products. As the last decade has seen a major shift from conventional emulsification processes towards nanoemulsions that both increase the efficiency and stability of emulsions and improve targeted drug and nutraceutical delivery, this book is a timely resource. - Summarizes general aspects of food nanoemulsions and their formulation - Provides detailed information on the production, application, and characterization of food nanoemulsion - Reveals the potential of nanoemulsions, as well as their novel applications in functional foods, nutraceutical products, delivery systems, and cosmetic formulations - Explains preparation of nanoemulsions by both low- and high-energy methods
Author: Stephen Mann
Publisher: John Wiley & Sons
ISBN: 9780471185970
Category : Technology & Engineering
Languages : en
Pages : 412
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Book Description
* Provides new insights into materials science * Indicates the value of biology in materials science * Demonstrates how new interdisciplinary studies are influencing the fields of materials science and chemistry * Surveys this new field and shows what progress has been made as well as indicating the potential of these applications * Leading scientists review biomimetic approaches to the synthesis and processing of nanoparticles, thin patterned films, ceramics, and organic-inorganic composites * Focuses on molecule synthesis, templating, organized construction and microstructural processing of biomimetic materials related titles are: - Meyers: Molecular Biology and Biotechnology - Silver: Biocompatibility Vol.1: Polymers
Author: P. Somasundaran
Publisher: CRC Press
ISBN: 9780849396045
Category : Science
Languages : en
Pages : 1148
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Book Description
