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Author : Ronny Vavrin
Publisher :
ISBN 13 :
Total Pages : 159 pages
Book Rating : 4.:/5 (428 download)
Download or read book Time-resolved Investigation of Aggregation and Sol-gel Transition in Colloidal Suspensions written by Ronny Vavrin and published by . This book was released on 2005 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ronny Vavrin
Publisher : Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN 13 : 9783838105147
Total Pages : 160 pages
Book Rating : 4.1/5 (51 download)
Download or read book Time-resolved Investigation of Aggregation and Gelation of Colloids written by Ronny Vavrin and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2009-08 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work we present a study of the aggregation and sol-gel transition of colloidal suspensions using a wide range of experimental techniques. We investigate in the first part of this work a model system which undergoes a sol-gel transition in the hope to gain further insight into the fundamental process of gelation. Therefore, a colloidal suspension of nano particles (polystyrene spheres) in water is destabilised to induce aggregation of fractal clusters. The clusters will grow until they finally all connect and form a gel. Combining neutron and light scattering, we are able to measure simultaneously and time resolved the static and dynamic properties of the same sample, which allows us to test well-known theories and to compare our data with recent results of other research groups. Our measurements demonstrate a deviation from classical theories in the critical behavior just before the gel is formed, which we interpret as a glassy cluster phase. The second part of this work describes an experimental setup which is based on a multiple scattering suppression scheme and which allows us to measure even relatively turbid samples faster and with higher precision.
Download or read book Time-resolved Investigation of Aggregation and Sol-gel Transition in Colloidal Suspensions written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work we present a study of the aggregation and sol-gel transition of colloidal suspensions using a wide range of experimental techniques, where some of them were modified or developed especially for this purpose. Covering all relevant time and length scales, we investigate in the first part of this work a model system which undergoes a sol-gel transition in the hope to gain further insight into the fundamental process of gelation. Therefore, a colloidal suspension of nano particles (polystyrene spheres) in water is destabilised to induce aggregation of fractal clusters. The clusters will grow until they finally all connect and form a volume filling network, i.e. a gel. Combining neutron and light scattering, we are able to measure simultaneously and time resolved the static and dynamic properties of the same sample in the length scale of a few Angstroms to several hundred nanometers, which allows us to test well-known theories and to compare our data with recent results of other research groups. Our measurements demonstrate a deviation from classical theories in the critical behavior just before the volume spanning network is formed, which we interpret with the observation of a glassy cluster phase. In order to investigate this effect, a novel technique is used to gain access to very slow dynamic processes, revealing data which seems to proof our hypothesis of a glassy phase in the gelation process. The second part of this work describes an experimental setup which is based on a light scattering technique introduced in the last ten years and which allows us to measure faster and with higher precision. By measuring simultaneously at four different angles instead of only one, a factor of four in acquisition time is gained in comparison to traditional setups. Moreover, dynamic measurements can be analysed angle dependent and therefore improved in precision. As the chosen technique is based on a multiple scattering suppression scheme, even relatively turbid samp.
Author : Sara Romer
Publisher : Herbert Utz Verlag
ISBN 13 : 9783831600106
Total Pages : 128 pages
Book Rating : 4.6/5 (1 download)
Download or read book Aggregation and Gelation of Concentrated Colloidal Suspensions written by Sara Romer and published by Herbert Utz Verlag. This book was released on 2001 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Plinio Innocenzi
Publisher : Springer
ISBN 13 : 3030200302
Total Pages : 108 pages
Book Rating : 4.0/5 (32 download)
Download or read book The Sol-to-Gel Transition written by Plinio Innocenzi and published by Springer. This book was released on 2019-06-26 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an in-depth introduction to the sol to gel transition in inorganic and hybrid organic-inorganic systems, one of the most important chemical-physical transitions and the basis of the sol-gel process. Familiarity with the fundamental chemistry and physics of this transition is essential for students in chemistry and materials science through academic and industry researchers working on sol-gel-related applications. The book features a didactic approach, using simple and clear language to explain the sol to gel transition and the accompanying processes. The text is also suitable for use in short courses and workshops for graduate students as well as professionals.This fully revised and updated new edition contains a wealth of new content. In particular, it includes a detailed discussion of the chemistry of transition metal alkoxides and organosilanes, and an extended discussion of the sol to gel transition models.
Author : C. Jeffrey Brinker
Publisher : Academic Press
ISBN 13 : 0080571034
Total Pages : 925 pages
Book Rating : 4.0/5 (85 download)
Download or read book Sol-Gel Science written by C. Jeffrey Brinker and published by Academic Press. This book was released on 2013-10-22 with total page 925 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing presents the physical and chemical principles of the sol-gel process. The book emphasizes the science behind sol-gel processing with a chapter devoted to applications. The first chapter introduces basic terminology, provides a brief historical sketch, and identifies some excellent texts for background reading. Chapters 2 and 3 discuss the mechanisms of hydrolysis and condensation for nonsilicate and silicate systems. Chapter 4 deals with stabilization and gelation of sols. Chapter 5 reviews theories of gelation and examines the predicted and observed changes in the properties of a sol in the vicinity of the gel point. Chapter 6 describes the changes in structure and properties that occur during aging of a gel in its pore liquor (or some other liquid). The discussion of drying is divided into two parts, with the theory concentrated in Chapter 7 and the phenomenology in Chapter 8. The structure of dried gels is explored in Chapter 9. Chapter 10 shows the possibility of using the gel as a substrate for chemical reactions or of modifying the bulk composition of the resulting ceramic by performing a surface reaction (such as nitridation) on the gel. Chapter 11 reviews the theory and practice of sintering, describing the mechanisms that govern densification of amorphous and crystalline materials, and showing the advantages of avoiding crystallization before sintering is complete. The properties of gel-derived and conventional ceramics are discussed in Chapter 12. The preparation of films is such an important aspect of sol-gel technology that the fundamentals of film formation are treated at length in Chapter 13. Films and other applications are briefly reviewed in Chapter 14. Materials scientists and researchers in the field of sol-gel processing will find the book invaluable.
Author : Frank Babick
Publisher : Springer
ISBN 13 : 9783319808635
Total Pages : 341 pages
Book Rating : 4.8/5 (86 download)
Download or read book Suspensions of Colloidal Particles and Aggregates written by Frank Babick and published by Springer. This book was released on 2018-04-25 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the properties of particles in colloidal suspensions. It has a focus on particle aggregates and the dependency of their physical behaviour on morphological parameters. For this purpose, relevant theories and methodological tools are reviewed and applied to selected examples. The book is divided into four main chapters. The first of them introduces important measurement techniques for the determination of particle size and interfacial properties in colloidal suspensions. A further chapter is devoted to the physico-chemical properties of colloidal particles—highlighting the interfacial phenomena and the corresponding interactions between particles. The book’s central chapter examines the structure-property relations of colloidal aggregates. This comprises concepts to quantify size and structure of aggregates, models and numerical tools for calculating the (light) scattering and hydrodynamic properties of aggregates, and a discussion on van-der-Waals and double layer interactions between aggregates. It is illustrated how such knowledge may significantly enhance the characterisation of colloidal suspensions. The final part of the book refers to the information, ideas and concepts already presented in order to address technical aspects of the preparation of colloidal suspensions—in particular the performance of relevant dispersion techniques and the stability of colloidal suspensions.
Author : Madeleine Djabourov
Publisher : Cambridge University Press
ISBN 13 : 1107067081
Total Pages : 367 pages
Book Rating : 4.1/5 (7 download)
Download or read book Physical Gels from Biological and Synthetic Polymers written by Madeleine Djabourov and published by Cambridge University Press. This book was released on 2013-05-16 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a unique perspective on state-of-the-art physical gels, this interdisciplinary guide provides a complete, critical analysis of the field and highlights recent developments. It shows the interconnections between the key aspects of gels, from molecules and structure through to rheological and functional properties, with each chapter focusing on a different class of gel. There is also a final chapter covering innovative systems and applications, providing the information needed to understand current and future practical applications of gels in the pharmaceutical, agricultural, cosmetic, chemical and food industries. Many research teams are involved in the field of gels, including theoreticians, experimentalists and chemical engineers, but this interdisciplinary book collates and rationalises the many different points of view to provide a clear understanding of these complex systems for researchers and graduate students.
Author : Alain C. Pierre
Publisher : Springer Nature
ISBN 13 : 3030381447
Total Pages : 716 pages
Book Rating : 4.0/5 (33 download)
Download or read book Introduction to Sol-Gel Processing written by Alain C. Pierre and published by Springer Nature. This book was released on 2020-03-10 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a broad, general introduction to the processing of Sol-Gel technologies. This updated volume serves as a general handbook for researchers and students entering the field. This new edition provides updates in fields that have undergone rapid developments, such as Ceramics, Catalysis, Chromatropgraphy, biomaterials, glass science, and optics. It provides a simple, compact resource that can also be used in graduate-level materials science courses.
Author :
Publisher : Springer
ISBN 13 : 9780387758886
Total Pages : 10398 pages
Book Rating : 4.7/5 (588 download)
Download or read book Encyclopedia of Complexity and Systems Science written by and published by Springer. This book was released on 2009-06-26 with total page 10398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This encyclopedia provides an authoritative single source for understanding and applying the concepts of complexity theory together with the tools and measures for analyzing complex systems in all fields of science and engineering. It links fundamental concepts of mathematics and computational sciences to applications in the physical sciences, engineering, biomedicine, economics and the social sciences.
Author : John D. Wright
Publisher : CRC Press
ISBN 13 : 1482283166
Total Pages : 136 pages
Book Rating : 4.4/5 (822 download)
Download or read book Sol-Gel Materials written by John D. Wright and published by CRC Press. This book was released on 2018-10-03 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sol-Gel processing methods, first used historically for decorative and constructional materials, were extensively developed in the last century for applications such as glasses, ceramics, catalysts, coatings, composites and fibres. Today they are reaching their full potential, enabling the preparation of new generations of advanced materials not easily accessible by other methods yet using mild, low-energy conditions. The topic is therefore increasingly included in advanced undergraduate, MSc and PhD programmes in the areas of chemistry, physics and materials science. This concise introductory text, written at the advanced undergraduate/first-year postgraduate level, is also suitable as an introduction to the development, mechanisms, chemistry, characterisation methods and applications of the technique. It provides readers with an extensive yet concise grounding in the theory of each area of the subject and details the real and potential applications and the future prospects of sol-gel chemistry.
Author :
Publisher :
ISBN 13 :
Total Pages : 1224 pages
Book Rating : 4.3/5 (91 download)
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ravi Kumar Pujala
Publisher : Springer
ISBN 13 : 9783319381954
Total Pages : 0 pages
Book Rating : 4.3/5 (819 download)
Download or read book Dispersion Stability, Microstructure and Phase Transition of Anisotropic Nanodiscs written by Ravi Kumar Pujala and published by Springer. This book was released on 2016-09-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores the dispersion stability, microstructure and phase transitions involved in the nanoclay system. It describes the recently discovered formation of colloidal gels via two routes: the first is through phase separation and second is by equilibrium gelation and includes the first reported experimental observation of a system with high aspect ratio nanodiscs. The phase behavior of anisotropic nanodiscs of different aspect ratio in their individual and mixed states in aqueous and hydrophobic media is investigated. Distinct phase separation, equilibrium fluid and equilibrium gel phases are observed in nanoclay dispersions with extensive aging. The work then explores solution behavior, gelation kinetics, aging dynamics and temperature-induced ordering in the individual and mixed states of these discotic colloids. Anisotropic ordering dynamics induced by a water-air interface, waiting time and temperature in these dispersions were studied in great detail along with aggregation behavior of nanoplatelets in hydrophobic environment of alcohol solutions.
Author : Norman J. Wagner
Publisher : Cambridge University Press
ISBN 13 : 1108423035
Total Pages : 437 pages
Book Rating : 4.1/5 (84 download)
Download or read book Theory and Applications of Colloidal Suspension Rheology written by Norman J. Wagner and published by Cambridge University Press. This book was released on 2021-04-15 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essential text on the practical application and theory of colloidal suspension rheology, written by an international coalition of experts.
Author : Horacio E. Bergna
Publisher : CRC Press
ISBN 13 : 1420028707
Total Pages : 926 pages
Book Rating : 4.4/5 (2 download)
Download or read book Colloidal Silica written by Horacio E. Bergna and published by CRC Press. This book was released on 2005-12-19 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of the apparent simplicity of silica's composition and structure, scientists are still investigating fundamental questions regarding the formation, constitution, and behavior of colloidal silica systems. Colloidal Silica: Fundamentals and Applications introduces new information on colloid science related to silica chemistry as well
Author : Tadao Sugimoto
Publisher : Elsevier
ISBN 13 : 0444627502
Total Pages : 852 pages
Book Rating : 4.4/5 (446 download)
Download or read book Monodispersed Particles written by Tadao Sugimoto and published by Elsevier. This book was released on 2019-11-16 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monodispersed Particles, Second Edition, covers all aspects of monodispersed particles, including inorganic and polymer particles and their composites. The book consists of four parts: fundamentals, preparation, analyses, and applications. Specifically, the fundamental part covers the theoretical insight into the surface energy of particles and its application to the formulation of the new theories of nucleation, growth and habit formation of monodispersed particles. In addition, the theories of recrystallization and solid-solution formation are introduced. These fundamental theories are applied to the precise control of their size, size distribution, shape, internal structure, and composition, leading to the design of diverse monodispersed functional particles widely used in basic science and modern industry.This second edition is fully updated and revised, detailing new theories and recent progress in the field of nanoparticles, including advanced nucleation theory, arrested growth mechanism for monodispersed nanoparticles, and energetics of habit formation. Additionally, the text covers in-depth insights into the anisotropic growth of Au and Ag nanoparticles, the formation mechanisms of polycrystalline Au spheres, iron oxide nanoparticles in heat-up and hot-injection processes, amorphous TiO2 spheres in a sol-gel system, anatase TiO2 in a gel-sol system and their shape control, AgCl nanoparticles in a reverse micelle system, organic-inorganic hybrid liquid crystals, and extensive biomedical applications. - Covers most of the known uniform particles, including inorganic and polymer particles and their composites - Includes development of novel fundamental theories of formation mechanisms, full of the author's own original ideas, and detailed background discussion on recent progress in the feild of nanoparticles and the latest advances in their applications - Features 2000 bibliographic references, providing a comprehensive guide to related study
Author : Sylvain Deville
Publisher : Springer
ISBN 13 : 3319505157
Total Pages : 618 pages
Book Rating : 4.3/5 (195 download)
Download or read book Freezing Colloids: Observations, Principles, Control, and Use written by Sylvain Deville and published by Springer. This book was released on 2017-01-19 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of the freezing of colloidal suspensions and explores cutting-edge research in the field. It is the first book to deal with this phenomenon from a multidisciplinary perspective, and examines the various occurrences, their technological uses, the fundamental phenomena, and the different modeling approaches. Its chapters integrate input from fields as diverse as materials science, physics, biology, mathematics, geophysics, and food science, and therefore provide an excellent point of departure for anyone interested in the topic. The main content is supplemented by a wealth of figures and illustrations to elucidate the concepts presented, and includes a final chapter providing advice for those starting out in the field. As such, the book provides an invaluable resource for materials scientists, physicists, biologists, and mathematicians, and will also benefit food engineers, civil engineers, and materials processing professionals.
