Download or read book Ultrafiltration Membranes from a Polymer Blend written by Ingrid Maria Wienk and published by . This book was released on 1993 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization and Performance of Polysulfone cellulose Acetate Phthalate Polyvinylpyrrolidone PSf CAP PVP Blend Ultrafiltration Membranes written by Asmadi Ali @ Mahmud and published by . This book was released on 2013 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polysulfone (PSf) is an important class polymer that has been most widely used in the manufacture of synthetic asymmetric ultrafiltration membranes. However, the main disadvantage of PSf membrane is due to its hydrophobic characteristic which in turn fouled the membranes. In practical application of UF systems, membrane fouling is a serious problem that causes high cost energy, operation, and maintenance. Polymer blend is a simple and an efficient method for designing new materials to improve performance of the hydrophobic membranes. The polymer blend is a proven tool to obtain new types of UF membrane, which has better hydrophilicity compared to the original membranes. Cellulose acetate phthalate (CAP) is one of the potential hydrophilic organic polymers that can be used and explored in PSf polymer blend technique to improve hydrophilicity and performance of PSf membranes. PSf/CAP blend membranes with blend composition of 95/5, 90/10, 85/15 and 80/20 wt% of total...

Download or read book Ultrafiltration Membranes and Applications written by Anthony R. Cooper and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a record of a symposium, "Ultrafiltration Membranes and Applications," which was held at the l78th National Meeting of the American Chemical Society in Washington, D.C., September 11-13, 1979. In organlzlng these sessions, I hoped to provide a comprehensive survey of the current state of ultrafiltration theory, the most recent advances in membrane technology, and a thorough treatment of existing applications and future directions for ultrafiltration. For me, the symposium was an outstanding success. It was a truly international forum with stimulating presentations and an enthusiastic audience. I hope that some of this spirit has spilled over into this volume, which is intended to reach a much wider audience. I am indebted to the Division of Colloid and Surface Chemistry of the American Chemical Society for their sponsorship. ANTHONY R. COOPER Palo Alto, California }larch, 1980 vii CONTENTS PART I. FUNDMfENTALS Fifteen Years of Ultrafiltration: Problems and Future Promises of an Adolescent Technology . . 1 Alan S. Michaels Production, Specification, and Some Transport Characteristics of Cellulose Acetate Ultrafil tration Membranes for Aqueous Feed Solutions 21 S. Sourirajan, Takeshi Matsuura Fu-Hung Hsieh and Gary R. Gildert Chemical and Morphological Effects of Solute Diffusion Through Block Copolymer Membranes 45 Yatin B. Thakore, Dien-Feng Shieh and Donald J. Lyman Practical Aspects in the Development of a Polymer Matrix for Ultrafiltration. 57 Israel Cabasso Permeability Parameters of a Novel Polyamide Membrane. ... - ...

Download or read book Polyurethane Polymers Blends and Interpenetrating Polymer Networks written by Sabu Thomas and published by Elsevier. This book was released on 2017-08-15 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethane Polymers: Blends and Interpenetrating Networks deals with almost all aspects of blends and IPNs formed by polyurethane, including the thermal, mechanical, morphological, and viscoelastic properties of each blend presented in the book. In addition, major applications related to these blends and IPNs are mentioned. - Provides an elaborate coverage of the chemistry of polyurethane, including its synthesis and properties - Includes available characterization techniques - Relates types of polyurethanes to their potential properties - Discusses blends options

Download or read book Polymer Blends Volume 1 written by Donald R Paul and published by Elsevier. This book was released on 2012-12-02 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Blends, Volume 1 highlights the importance of polymer blends as a major new branch of macromolecular science. Topics range from polymer-polymer compatibility and the statistical thermodynamics of polymer blends to the phase separation behavior of polymer-polymer mixtures, transport phenomena in polymer blends, and mechanical properties of multiphase polymer blends. The optical behavior, solid state transition behavior, and rheology of polymer blends are also discussed. This book is organized into 10 chapters and begins with an overview of polymer blends, with emphasis on terminology and the effect of molecular weight on the thermodynamics of polymer blends as well as phase equilibria and transitions. The discussion then turns to the miscibility of homopolymers and copolymers, in bulk and in solution, from the experimental and theoretical viewpoints. The chapters that follow explore the statistical thermodynamics of polymer blends, paying particular attention to the Flory and lattice fluid theories, along with the phase relationship in polymer mixtures. The interfacial energy, structure, and adhesion between polymers in relation to the properties of polymer blends are considered. The final chapter examines the phenomena of low molecular weight penetrant transport. Currently accepted models for unsteady-state and steady-state permeation of polymeric materials are presented. A discussion of unsteady-state absorption and desorption behavior observed in a variety of polymer blends complements the treatment of permeation behavior. This book is intended to provide academic and industrial research scientists and technologists with a broad background in current principles and practice concerning mixed polymer systems.

Download or read book Recycled Polymer Blends and Composites written by Hanafi Ismail and published by Springer Nature. This book was released on 2023-10-25 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an authoritative account of the potential of recycled polymer blends and composites such as recycled rubber, Polypropylene, Poly(Vinylidene Fluoride) (PVDF), polyhydroxybutyrate-3-valerate (PHBV), Polyethylene, and similar compounds, in polymer recycling industries. It highlights the latest research on fundamentals of recycled polymer blends and composites such as physical, chemical, mechanical and thermal properties and morphological studies. The book also provides a comprehensive state of the art review of recycling of polymer blends and composites for sustainability. Polymeric substances recycled from excess sludge in wastewater treatment plants, reinsertion of Poly(Vinylidene Fluoride) (PVDF), polyolefin and Polypropylene post-Industrial waste by primary recycling, as well as the recent development of biomass and COVID-19 plastic waste derived char filled natural starch biocomposite briquettes are also covered.

Download or read book Polymer Membranes written by T. deV. Naylor and published by iSmithers Rapra Publishing. This book was released on 1996 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the constitution and application of polymeric membranes in separation processes. The separation processes covered are reverse osmosis and nanofiltration, ultrafiltration, gas separation, pervaporation and ion exchange. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.

Download or read book Insane in the Membrane Modification of Polymeric Membranes for High Performance Water Separations written by Brian McVerry and published by . This book was released on 2016 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is not unknown that the worldwide freshwater supply is dwindling and current freshwater sources are being contaminated. The total amount of freshwater, which makes up 2.5- 3% of the total water on earth, is actually sufficient to sustain the growing population for many years. However, the disproportionate geographical distribution of freshwater raises issues, as many people occupy arid regions. The transport or piping of large volumes of water over long distances is typically prohibitively expensive and/or prevented by geopolitical interests. The drive to produce freshwater locally from non-traditional sources has advanced in recent years and current energy and production costs have fallen due to technological advances. Filtration through polymeric materials has emerged as the leading technology for freshwater production from seawater, brackish water, and wastewater. Polymer membranes have surpassed ceramic membranes as the leading filtration medium because of their low-cost and versatility. Large sheets of membranes can be cast using an in-line manufacturing process and pore sizes can be readily tuned for specific applications. However, membrane fouling severely limits the advantages and economics of polymeric membrane-based separations. This dissertation will examine methods to produce fouling-resistant membranes that maintain the low- cost and scalability of polymer membranes for ultrafiltration and reverse osmosis. The first chapter presents a brief history and introduction to membrane technology and its current status. This chapter outlines membrane casting methods, the polymers used in casting films and their advantages, different configurations for membrane modules, the effects of fouling, and the cost of fouling. The second chapter introduces a new hydrophilic, polyaniline-based additive that was synthesized to blend into polysulfone unltrafiltration membranes. Sulfonated polyaniline (SPANi) is a self-doped polyaniline derivative that is readily synthesized using fuming sulfuric acid. SPANi, when de-doped, is soluble in polar organic solvents and insoluble in water, making it an excellent candidate for blending into ultrafiltration membranes. When redoped at pH 7, the presence of pendant sulfonic acid groups creates a zwitterionic species. Zwitterionic moeities are known to possess super-hydrophilic and ultra-low fouling properties. When blended into polysulfone (PSf) ultrafiltration membranes at low concentrations, the SPANi-PSf membranes demonstrate greater hydrophilicity and anti-fouling properties when compared to pure PSf membranes with nominal changes in performance. For reverse osmosis (RO) membranes, the active or "skin" layer that performs the separation is a dense, non-porous polymer. Thus, blending hydrophilic molecules into the active layer or modifying the chemistry of the active layer affects the separation properties of the resulting polymer blend. To address this issue, researchers have grafted hydrophilic polymers to the surface of membranes to impart anti-fouling properties without significant changes in their performance. In Chapter 3, a new method is presented using photoactive hydrophilic polymer precursors to modify membrane surfaces. With this new method, commercial RO membranes can be modified rapidly under ambient conditions, maintaining the roll-to-roll scalability of RO membrane processing. The grafted commercial RO membranes exhibit enhanced hydrophilicity and anti-fouling properties when compared with unmodified RO membranes. Chapter 4 investigates applying the same method of imparting anti-fouling properties to polymeric membranes as discussed in Chapter 3, except here this method is applied to ultrafiltration (UF) membranes used for membrane bioreactors. Membrane bioreactor technology has gained attention recently for its highly efficient ability to clean wastewater. However, the concentrated loading of organics and microorganisms into the reactor medium leads to high fouling rates. First, modeling data are presented that identifies specific acid-base interactions between different foulants and the membrane surface that accelerate membrane fouling. New photoactive small molecule precursors were then synthesized and covalently bound to the membrane surface to repel these interactions. The small molecule with the greatest repulsive interaction, a zwitterionic derivative, imparted the greatest anti-fouling properties to the commercial UF membranes. The modified membranes exhibited low fouling rates in both a short-term and a long-term study. Chapter 5 summarizes the dissertation and outlines the key takeaways.

Download or read book Design and Applications of Nanostructured Polymer Blends and Nanocomposite Systems written by Sabu Thomas and published by William Andrew. This book was released on 2015-09-22 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design and Applications of Nanostructured Polymer Blend and Nanocomposite Systems offers readers an intelligent, thorough introduction to the design and applications of this new generation of designer polymers with customized properties. The book assembles and covers, in a unified way, the state-of-the-art developments of this less explored type of material. With a focus on nanostructured polymer blends, the book discusses the science of nanostructure formation and the potential performance benefits of nanostructured polymer blends and composites for applications across many sectors: electronics, coatings, adhesives, energy (photovoltaics), aerospace, automotive, and medical devices (biocompatible polymers). The book also describes the design, morphology, and structure of nanostructured polymer composites and blends to achieve specific properties. - Covers all important information for designing and selecting the right nanostructured polymer system - Provides specialized knowledge on self-repairing, nanofibre and nanostructured multiphase materials, as well as evaluation and testing of nanostructured polymer systems - Serves as a reference guide for development of new products in industries ranging from electronics, coatings, and energy, to transport and medical applications - Describes the design, morphology, and structure of nanostructured polymer composites and blends to achieve specific properties

Download or read book Advancement in Polymer Based Membranes for Water Remediation written by Sanjay K. Nayak and published by Elsevier. This book was released on 2022-02-23 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advancements in Polymer-Based Membranes for Water Remediation describes the advanced membrane science and engineering behind the separation processes within the domain of polymer-based membrane systems in water remediation. Emphasis has been put on several aspects, ranging from fundamental concepts to the commercialization of pressure and potential driven membranes, updated with the latest technological progresses, and relevant polymer materials and application potential towards water treatment systems. Also included in this book are advances in polymers for membrane application in reverse osmosis, nanofiltration, ultrafiltration, microfiltration, forward osmosis, and polymeric ion-exchange membranes for electrodialysis and capacitive deionization. With its critical analyzes and opinions from experts around the world, this book will garner considerable interest among actual users, i.e., scientists, engineers, industrialists, entrepreneurs and students. - Evaluates water remediation using pressure driven and potential driven membrane processes - Reviews emerging polymer systems for membranes preparation - Offers a comprehensive analysis in the development of polymer-based membranes and their applications in water remediation - Analyzes membrane performance parameters to evaluate separation efficiency for various water pollutants - Covers concept-to-commercialization aspects of polymer-based membranes in terms of water purification, pollutant removal, stability and scalability

Download or read book Poly vinyl chloride based Blends Interpenetrating Polymer Networks IPNs and Gels written by Sabu Thomas and published by Elsevier. This book was released on 2024-03-30 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poly(vinyl chloride)-Based Blends, IPNs, and Gels brings together the latest research on the blending of PVC, covering processing, materials, properties, and applications. This book addresses these challenges and highlights the state-of-the-art in the field, such as the development of eco-friendly micro and nanostructured functional materials based on PVC and advances in experimental and theoretical studies of PVC based-polymer blends. This is a valuable resource for researchers and advanced students in polymer science, chemistry, composite science, and materials science and engineering, as well as R&D professionals, engineers, and scientists working with advanced PVC-based materials across a range of industries. - Offers methodical, in-depth coverage of PVC-based blends, IPNs, and gels with each polymer type - Explains advanced methods for PVC-based materials with improved properties for a range of novel applications - Provides avenues for improved sustainability, discussing PVC from biomass, life cycle, recycling, and other environmental considerations

Download or read book Polyvinylchloride based Blends written by Visakh P. M. and published by Springer Nature. This book was released on 2021-09-23 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes many of the recent research accomplishments in the area of polyvinylchloride (PVC)-based blends and their preparation, characterization and applications. Various sub-topics are addressed, such as the state-of-the-art of PVC based blends, new challenges and opportunities, emphasis being given to the types and sizes of components/fillers and optimum compositions of PVC blends, their processing and structure-properties relationships, modification/compatibilization methods, and possible applications. PVC/thermoplastic based nano, micro and macro blends, PVC membranes, bio-based plasticizers and PVC blends with components from renewable resources are reported. The various chapters in this book are contributed by prominent researchers from industry, academia and government/private research laboratories across the globe. It covers an up-to-date record on the major findings and observations in the field of PVC-based blends.

Download or read book Hybrid Membrane Systems for Water Purification written by Rajindar Singh and published by Elsevier. This book was released on 2006-02-08 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane systems are finding increasing application worldwide in the purification of potable and industrial water, and their design and use is set to grow considerably in years to come. This comprehensive book is written in a practical style with emphasis on process description, key unit operations, plant equipment description, equipment installation, safety and maintenance, process control, plant start-up, operation and troubleshooting. It is supplemented by case studies and useful engineering rules-of-thumb. The author is a chemical engineer with many years experience in the field and his technical knowledge and practical know-how in the water purification industry are summarised succinctly in this volume.This book...* Will ensure your system design is fit for its purpose* Informs readers of which membranes to use; why, where and when* Will help readers to trouble-shoot and improve performance* Provides case studies help understanding through real-life situationsThis book...* Will ensure your system design is fit for its purpose* Informs readers of which membranes to use; why, where and when* Will help readers to trouble-shoot and improve performance* Provides case studies help understanding through real-life situations

Download or read book MEMBRANE PROCESSES Volume II written by and published by EOLSS Publications. This book was released on 2010-11-05 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane Processes is a component of Encyclopedia of Water Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. These volumes discuss matters of great relevance to our world on desalination which is a critically important as clearly the only possible means of producing fresh water from the sea for many parts of the world. The two volumes present state-of-the art subject matter of various aspects of Membrane Processes such as: History And Current Status Of Membrane Desalination Processes; Membrane Science And Reclamation; Membrane Characterization; Principles And Practices Of Reverse Osmosis; Reverse Osmosis: Introduction; Hollow-Fiber Membranes; Preparation And Characterization Of Ionexchange Membranes; Preparation And Characterization Of Micro- And Ultrafiltration Membranes; Membrane Distillation; Desalination By Membrane Distillation; Pervaporation;Dialysis And Diffusion Dialysis; Donnan Dialysis; Modeling And Calculation Of Pressure-Driven Membrane Processes; Survey Of Theoretical Approaches To Modeling; Pressure-Driven Membrane. Processes(Submodels For Transport In Phases); Reverse Osmosis Process And System Design; Practical Aspects Of Large-Scale Reverse Osmosis Applications; Health, Safety And Environmental Considerations; Membrane Separation Technologies; Concentration Of Liquid Foods; Mass Transfer Operation–Membrane Separations; Mass Transfer Operations: Hybrid Membrane Processes; Recent Advances In Membrane Science And Technology In Seawater Desalination – With Technology Development In The Middle East And Singapore. These volumes are aimed at the following five major target audiences: University and College Students Educators, Professional Practitioners, Research Personnel and Policy and Decision Makers

Download or read book Sustainable Membrane Technology for Energy Water and Environment written by Ahmad Fauzi Ismail and published by John Wiley & Sons. This book was released on 2012-01-20 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed look at the most recent developments in sustainable membrane technology for use in energy, water, and the environment A collection of twenty-seven groundbreaking papers on important ideas about the development of membrane science and technology, Sustainable Membrane Technology for Energy, Water, and Environment brings together contributions from leading international experts in one comprehensive volume. Covering the latest developments and most innovative ideas in the field, this book is a unique resource for understanding the growing interest in using membranes across several industries. Divided into six chapters that cover new membrane materials and membrane development; membrane applications for gas and vapor separation; membrane applications in water treatment; environmental applications of membranes; energy applications of membranes; and other industrial membrane applications, the book looks at the current and emerging applications for membrane science and technology in detail. As the Association of Southeast Asian Nations (ASEAN) and the Middle East emerge as the next generation of membrane research and development centers, in part due to their need for water and natural gas production technology, this book provides invaluable insights into the cutting-edge work taking place in these regions. Additional topics covered also include new membrane materials, membrane applications for food processing, and much more. Designed for engineers, scientists, professors, and graduate students who are engaged in membrane R&D activities, as well as for anyone interested in sustainable development, Sustainable Membrane Technology for Energy, Water, and Environment is a cutting-edge look at membrane applications.

Download or read book Materials for Biomedical Engineering Biopolymer Fibers written by Valentina Grumezescu and published by Elsevier. This book was released on 2019-03-20 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials for Biomedical Engineering: Biopolymer Fibers discusses the use of biopolymer fibers in the development of biomedical applications. It provides a recent review of the main types of polymeric fibers and their impact in biomedicine and related fields. The development of different instruments, such as sensors, medical fibers, and textiles are discussed, along with how they greatly benefited by progress made in polymeric fibers. The book provides a comprehensive and updated reference on the latest research in the field of biopolymers and their composites in relation to medical applications. - Provides a valuable resource of recent scientific progress, highlighting the application and use of polymeric fibers in biomedical engineering that can be used by researchers, engineers and academics - Includes novel opportunities and ideas for developing or improving technologies in biopolymers by companies, biomedical industries, and other sectors - Features at least 50% of references from the last 2-3 years

Download or read book Recent Developments in Polymer Macro Micro and Nano Blends written by P.M. Visakh and published by Woodhead Publishing. This book was released on 2016-08-24 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Developments in Polymer Macro, Micro and Nano Blends: Preparation and Characterisation discusses the various types of techniques that are currently used for the characterization of polymer-based macro, micro, and nano blends. It summarizes recent technical research accomplishments, emphasizing a broad range of characterization methods. In addition, the book discusses preparation methods and applications for various types of polymer-based macro, micro, and nano blends. Chapters include thermoplastic-based polymer & nano blends, applications of rubber based and thermoplastic blends, micro/nanostructures polymer blends containing block copolymers, advances in polymer-inorganic hybrids as membrane materials, synthesis of polymer/inorganic hybrids through heterophase polymerizations, nanoporous polymer foams from nanostructured polymer blends, and natural polymeric biodegradable nano blends for protein delivery. - Describes the techniques pertaining to a kind (or small number) of blends, showing specific examples of their applications - Covers micro, macro, and nano polymer blends - Contains contributions from leading experts in the field