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Book Polyelectrolytes

Download or read book Polyelectrolytes written by Visakh P. M. and published by Springer. This book was released on 2014-09-03 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a valuable reference source to graduate and post graduate students, engineering students, research scholars polymer engineers from industry. The book provides the reader with current developments of theoretical models describing the thermodynamics polyelectrolytes as well as experimental findings. A particular emphasis is put on the rheological description of polyelectrolyte solutions and hydrogels.

Book Multilayer Thin Films

Download or read book Multilayer Thin Films written by Gero Decher and published by John Wiley & Sons. This book was released on 2012-06-11 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second, comprehensive edition of the pioneering book in this fi eld has been completely revised and extended, now stretching to two volumes. The result is a comprehensive summary of layer-by-layer assembled, truly hybrid nanomaterials and thin fi lms, covering organic, inorganic, colloidal, macromolecular, and biological components, as well as the assembly of nanoscale fi lms derived from them on surfaces. These two volumes are essential for anyone working in the field, as well as scientists and researchers active in materials development, who needs the key knowledge provided herein for linking the field of molecular self-assembly with the bio- and materials sciences.

Book Advances in Membrane Technologies

Download or read book Advances in Membrane Technologies written by Amira Abdelrasoul and published by BoD – Books on Demand. This book was released on 2020-03-04 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane technologies are currently the most effective and sustainable methods utilized in diversified water filtration, wastewater treatment, as well as industrial and sustainable energy applications. This book covers essential subsections of membrane separation and bioseparation processes from the perspectives of technical innovation, novelty, and sustainability. The book offers a comprehensive overview of the latest improvements and concerns with respect to membrane fouling remediation techniques, issues of bioincompatibility for biomedical applications, and various subareas of membrane separation processes, which will be an efficient resource for engineers.

Book Polyelectrolytes and their Applications

Download or read book Polyelectrolytes and their Applications written by A. Rembaum and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyelectrolytes and their Applications is the second volume in the series 'Charged and Reactive Polymers'. The important areas of polyelectrolyte applications, i.e., biomedicine, water purification, petroleum recovery and drag reduction, are pre sented along with discussions of the fundamental principles of polyelectrolyte chem istry and physics. This book should be of interest to scientists such as physicians, biochemists, polymer chemists and chemical engineers involved in applications of these materials. The first part of the book is devoted to the basic properties of polyelectrolytes in general, namely to the factors influencing the chain conformation of charged polymers in solution and to their counterion selectivity. It also contains methods of synthesis and new concepts of charge stabilized polymer colloids and of polyelectrolyte ca talysis. The second part describes recent information on the properties and biological effects of already well-known natural polyelectrolytes such as heparin and DNA and recently developed polymers such as pyran and polyionenes. The effects of poly anions and polycations on normal and transformed cells as well as on acetylcholine receptors follow. This part is of particular interest to scientists involved in biological research.

Book Ion and Electron Transport in Polyelectrolyte Multilayers

Download or read book Ion and Electron Transport in Polyelectrolyte Multilayers written by Samir Abou Shaheen and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyelectrolytes are charged polymers, widely spread in nature and industry. The spontaneous association between two oppositely charged polyelectrolytes in solution yields a compact and versatile material called a polyelectrolyte complex. Polycations and polyanions can also form thin films or polyelectrolyte multilayers when they are alternately deposited on a substrate. These interesting macromolecules have been integrated into a long list of applications including fuel cells, electronics and membranes for separation. Information on the interactions and dynamics of species across polyelectrolyte composites is highly desirable to understand the performance of these materials and enhance the aspects of their applications. This dissertation focuses on probing ion, water and electron transport across a polyelectrolyte complex and investigating the interaction between a polyelectrolyte and metal surfaces. The work can be divided into three main parts: In the first part, the response of water and ions in a hydrated polyelectrolyte complex made of poly(diallyldimethylammonium), PDADMA, and poly(styrene sulfonate), PSS, were evaluated as a function of temperature. The glass transition temperature, Tg, at which the material softens was determined using rheology. The behavior of water diffusion coefficient versus temperature was monitored using pulse field gradient NMR. No change in the diffusion response was detected as the material went through Tg. Similar observation was found for the transport of small monovalent ions, such as Na+ and Cl-, which was measured using variable temperature ionic conductivity. In contrast, flux measurements on a rotating disk electrode revealed a transition point for the diffusion versus temperature of triple-charged ions, ferricyanide and ruthenium hexamine. These responses were interpreted to show the cooperative segmental mobility near the glass transition temperature. In the second part, the polyelectrolyte multilayer system made of PDADMA and PSS was also employed to produce pinhole-free ultrathin films and a radiolabeling approach was developed to determine their exact thicknesses. Electrochemical methods were used to assess electron transport from ferrocyanide redox ion to a platinum rotating disk electrode across the polymeric barriers. It was shown that even the thinnest film made of one bilayer (about 1 nm thick) provides significant blocking of electron transfer from ferrocyanide in solution to the electrode and a complete insulating film could be formed from six additional layers (9 nm). Over the 1-9 nm range, a weak current-distance dependence suggested a hopping electron transport mechanism. The classical Butler-Volmer description, which shows the current-voltage dependence, for charge transfer kinetics was modified to produce a consistent model for multi-step hopping transport through the multilayer films. Studies of polyelectrolyte interactions and the transport rate of species in polyelectrolyte complexes are fundamental to understand the often-perplexing behavior of these materials and improve their performance in the wide array of energy and separation applications. In the final part, the pairing strength between a polyelectrolyte and metal surfaces was examined. Fractional precipitation of poly(4-vinylpyridine) was used to obtain narrow molecular weight fractions. The fractions were methylated using iodomethane and characterized using NMR, FTIR and size-exclusion chromatography. One fraction was labeled with 14C radionuclide and the interaction between methylated poly(4-vinylpyridine) and metal oxide powders was monitored as a function of ionic strength using radiocounting. Metal oxides interacted differently and were divided into 3 categories: classical desorbing, peak-less desorbing and non-adsorbing. An interaction scale was set based on the cut-off salt concentration.

Book Biocatalytic Membrane Reactors

Download or read book Biocatalytic Membrane Reactors written by Enrico Drioli and published by CRC Press. This book was released on 1998-11-27 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research level reference book has been co-written by Enrico Drioli, perhaps one of the world's best known researchers into membrane technology. The application of membrane technology to chemical transformation and molecular separation are beginning to be exploited in the pharmaceutical science and biotechnology industries, but there is a need for researchers and students to have up-to-date literature - and this book provides it. The book will be of interest to students of chemistry, chemical engineering, pharmacy and biotechnology.

Book Application of Nanotechnology in Membranes for Water Treatment

Download or read book Application of Nanotechnology in Membranes for Water Treatment written by Alberto Figoli and published by CRC Press. This book was released on 2017-07-14 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on Application of Nanotechnology in Membranes for Water Treatment but not only provides a series of innovative solutions for water reclamation through advanced membrane technology but also serves as a medium to promote international cooperation and networking for the development of advanced membrane technology for Universal well-being and to achieve the common goal of supplying economically, environmentally and societally sustainable freshwater and better sanitation systems. This book is unique because the chapters were authored by established researchers all around the globe based on their recent research findings. In addition, this book provides a holistic coverage of membrane development for water treatment, from the membrane preparation and characterizations to the performance for specific processes and applications. Since that water scarcity has become a global risk and one of the most serious challenges for the scientific community in this century, the publication of this book is therefore significant as it will serve as a medium for a good reference of an alternative solution in water reclamation. This book will provide the readers with a thorough understanding of the different available approaches for manufacturing membranes both with innovative polymeric systems and inorganic nano-materials which could give enhanced functionalities, catalytic and antimicrobial activities to improve the performance of the existing membranes. It will be useful for leading decision and policy makers, water sector representatives and administrators, policy makers from the governments, business leaders, business houses in water treatment, and engineers/ scientists from both industrialized and developing countries as well.

Book Electrochemical Membrane Technology for Water and Wastewater Treatment

Download or read book Electrochemical Membrane Technology for Water and Wastewater Treatment written by Zhiwei Wang and published by Elsevier. This book was released on 2022-04-04 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemical membrane technology has drawn extensive attention worldwide during the past decade in water and wastewater treatment. Coupling electrochemical process with membrane technology not only enables a higher removal or decomposition of pollutants in waters, but also ensures a more effective control of membrane fouling as well as a more highly selective separation process. The recent development of electrochemical membrane technology has also extended its applications in desalination, energy harvest, and resource recovery from seawater and wastewaters. Electrochemical Membrane Technology for Water and Wastewater Treatment consolidates state-of-the-art research developments in electrochemical membrane technology in water reclamation and sustainability in terms of fundamental theories, membrane and electrode materials, reactor designs, fouling control mechanisms and applications. Electrochemical Membrane Technology for Water and Wastewater Treatment also introduces fundamental theories and applications of electrochemical membrane technology. The knowledge gaps and future research perspectives in electrochemical membrane technology are also addressed. This book is an excellent resource for the understanding of fundamental theories, latest developments and future prospects in electrochemical membrane technology, which can benefit a broad audience of researchers and engineers working in water purification, membrane technology and electrochemical process. - Consolidates scattered knowledge of electrochemical membrane technology into a more accessible resource - Provides a comprehensive review of fundamental theories, membrane materials and module design as well as the latest developments of electrochemical membrane technology - Provides the state-of-art review on the applications of electrochemical membrane technology - Includes detailed discussion on the challenges and prospects of electrochemical membrane technology in different applications

Book Multilayer Thin Films

Download or read book Multilayer Thin Films written by Gero Decher and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials scientists are often faced with the problem of modifying surfaces of objects, yet keeping their shape and properties. This book provides a detailed survey on the new technology of adsorption from solution for the fabrication of molecularly ordered multicomposite films in order to replace and expand on the well known Langmuir-Blodgett technology and to open the field of molecular self-assembly to materials and biosciences. The book is aimed at scientists who want to integrate several different functional entities in a single device. To this audience it presents the technique of layer-by-layer assembly as today's most powerful key technology, which is low cost, solution based and very robust. It is already beginning to make the transition from academic research into industrial mass production.

Book Introduction to Membrane Science and Technology

Download or read book Introduction to Membrane Science and Technology written by Heinrich Strathmann and published by John Wiley & Sons. This book was released on 2011-10-17 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a dedicated lecturer and leading membrane scientist, who has worked both in academia and industry, this advanced textbook provides an impressive overview of all aspects of membranes and their applications. Together with numerous industrial case studies, practical examples and questions, the book provides an excellent and comprehensive introduction to the topic. Advanced students as well as process and chemical engineers working in industry will profit from this resource. A significant feature of the book is the treatment of more recently developed membranes and their applications in energy conversion, biomedical components, controlled release devices and environmental engineering with an indication of the present and future commercial impact. The solutions to the questions in the book can be found under http://www.wiley-vch.de/publish/en/books/ISBN3-537-32451-8/ From the Contents: * Introduction * Fundamentals * Membrane Preparation and Characterization * Principles of Membrane Separation Processes * Membrane Modules and Concentration Polarization * Membrane Process Design and Operation

Book Advances in Functional Separation Membranes

Download or read book Advances in Functional Separation Membranes written by Xin Li and published by Royal Society of Chemistry. This book was released on 2021-12-08 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introducing the advances of functional membranes along with their design and environmental applications. This book is a useful reference for environmental chemists and membrane engineers.

Book Adsorption of Ionic Surfactants to Self assembled Polyelectrolyte Multilayer Films

Download or read book Adsorption of Ionic Surfactants to Self assembled Polyelectrolyte Multilayer Films written by Johnathan Lee Barnes and published by . This book was released on 2001 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The self-assembly process that ionic polymers undergo in dilute aqueous solution to form molecular monolayers on charged surfaces has been well documented and characterized in the literature. It has been demonstrated that by sequentially immersing a substrate with a charged surface in aqueous solutions containing polyanions and polycations, respectively, adsorbed polymer multilayer assemblies can be constructed. It was our goal with this work to limit or terminate the growth of these multilayers by adsorbing ionic surfactant monomers, thereby rendering the surface inert to further polyelectrolyte adsorption. Here we study the effectiveness of five capping agents, sodiumdodecyl sulfate (SDS), dodecylamine (DDA), dodecyltrimethylammonium bromide (DTAB), didodecyldimethylammonium bromide (DDAB), and tridodecylmethylammonium iodide (TMAI), and report the results. We monitored the quality and growth of polyelectrolyte bilayers with water contact angle measurements, and UV/visible spectra. To explain the results, we incorporate arguments derived from computational chemistry. Of the five candidates, TMAI worked the best but none of them worked completely.

Book Polyelectrolytes for Water Waste Water Treatment

Download or read book Polyelectrolytes for Water Waste Water Treatment written by William L. Schwoyer and published by Springer. This book was released on 1981-09-11 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: