Download or read book Applications of Multilayer Polyelectrolyte Films in Corrosion Inhibition Ion Separation and Catalysis written by Jinhua Dai and published by . This book was released on 2002 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polyelectrolyte Multilayer Films for Ion Separation and Water Purification written by Maneesha Adusumilli and published by . This book was released on 2010 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Ion exchange Membranes Prepared Using Layer by layer Polyelectrolyte Deposition written by Guanqing Liu and published by . This book was released on 2009 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polyelectrolyte Multilayer Coatings for Conductive Nanomaterials Patterning and Anti wrinkling Applications written by Troy Richard Hendricks and published by . This book was released on 2008 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemoresponsive Materials written by Hans-Jörg Schneider and published by Royal Society of Chemistry. This book was released on 2022-07-08 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart materials stimulated by chemical or by logical signals hold promise for many applications, including new sensors and actuators for medicine, environmental and process control. In contrast to other books on responsive materials which are restricted to sensing, this volume not only highlights fundamental chemical and physical principles but also focuses on the use of smart materials for applications such as drug delivery, wound healing, cell adhesion, tuneable vesicles, surface control, smart paints and glasses, separations, oil recovery and artificial muscles. In this completely updated and expanded edition, readers are introduced to the area with chapters reflecting the enormous expansion of the field in recent years. Different responsive material systems will be covered including hydrogels, membranes, thin layers, polymer brushes, chemomechanical and imprinted polymers, nanomaterials and silica particles. With contributions from internationally recognised experts, the book will appeal to graduate students and researchers in academia, healthcare and industry interested in functional materials and their applications.

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.

Download or read book Supramolecular Chemistry in Corrosion and Biofouling Protection written by Viswanathan S. Saji and published by CRC Press. This book was released on 2021-12-23 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supramolecular chemistry, "the chemistry beyond the molecule", is a fascinating realm of modern science. The design of novel supramolecular structures, surfaces, and techniques are at the forefront of research in different application areas, including corrosion and biofouling protection. A team of international experts provide a comprehensive view of the applications and potential of supramolecular chemistry in corrosion and biofouling prevention. Chapter topics include types and fundamentals of supramolecules, supramolecular polymers and gels, host-guest inclusion compounds, organic-inorganic hybrid materials, metallo-assemblies, cyclodextrins, crown ethers, mesoporous silica and supramolecular structures of graphene and other advances. Additional Features include: Focuses on different aspects of supramolecular chemistry in corrosion and biofouling prevention. Comprehensively covers supramolecular interactions that can provide better corrosion and biofouling protection. Provides the latest developments in self-healing coatings. Explores recent research advancements in the suggested area. Includes case studies specific to industries. The different supramolecular approaches being investigated to control corrosion and biofouling are gathered in one well-organized reference to serve senior undergraduate and graduate students, research students, engineers, and researchers in the fields of corrosion science & engineering, biofouling, and protective coatings.

Download or read book Biomimetic Polymers written by C.G. Gebelein and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term biomimetic is comparatively new on the chemical scene, but the concept has been utilized by chemists for many years. Furthermore, the basic idea of making a synthetic material that can imitate the func tions of natural materials probably could be traced back into antiquity. From the dawn of creation, people have probably attempted to duplicate or modify the activities of the natural world. (One can even find allusions to these attempts in the Bible; e. g. , Genesis 30. ) The term "mimetic" means to imitate or mimic. The word "mimic" means to copy closely, or to imitate accurately. Biomimetic, which has not yet entered most dictionaries, means to imitate or mimic some specific bio logical function. Usually, the objective of biomimetics is to form some useful material without the need of utilizing living systems. In a simi lar manner, the term biomimetic polymers means creating synthetic poly mers which imitate the activity of natural bioactive polymers. This is a major advance in polymer chemistry because the natural bioactive polymers are the basis of life itself. Thus, biomimetic polymers imitate the life process in many ways. This present volume delineates some of the recent progress being made in this vast field of biomimetic polymers. Chemists have been making biomimetic polymers for more than fifty years, although this term wasn't used in the early investigations.

Download or read book 2D Metal Carbides and Nitrides MXenes written by Babak Anasori and published by Springer Nature. This book was released on 2019-10-30 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the rapidly expanding field of two-dimensional (2D) transition metal carbides and nitrides (MXenes). It covers fundamental knowledge on synthesis, structure, and properties of these new materials, and a description of their processing, scale-up and emerging applications. The ways in which the quickly expanding family of MXenes can outperform other novel nanomaterials in a variety of applications, spanning from energy storage and conversion to electronics; from water science to transportation; and in defense and medical applications, are discussed in detail.

Download or read book Bottom up Nanofabrication Self assemblies I written by Katsuhiko Ariga and published by American Scientific Publishers. This book was released on 2009 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Active Protective Coatings written by Anthony E. Hughes and published by Springer. This book was released on 2016-03-01 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers a broad range of materials science that has been brought to bear on providing solutions to the challenges of developing self-healing and protective coatings for a range of metals. The book has a strong emphasis on characterisation techniques, particularly new techniques that are beginning to be used in the coatings area. It features many contributions written by experts from various industrial sectors which examine the needs of the sectors and the state of the art. The development of self-healing and protective coatings has been an expanding field in recent years and applies a lot of new knowledge gained from other fields as well as other areas of materials science to the development of coatings. It has borrowed from fields such as the food and pharmaceutical industries who have used, polymer techniques, sol-gel science and colloidosome technology for a range encapsulation techniques. It has also borrowed from fields like hydrogen storage such as from the development of hierarchical and other materials based on organic templating as “nanocontainers” for the delivery of inhibitors. In materials science, recent developments in high throughput and other characterisation techniques, such as those available from synchrotrons, are being increasing used for novel characterisation – one only needs to look at the application of these techniques in self healing polymers to gauge wealth of new information that has been gained from these techniques. This work is largely driven by the need to replace environmental pollutants and hazardous chemicals that represent risk to humans such as chromate inhibitors which are still used in some applications.

Download or read book Polymer Nanoclay Composites written by Stephan Laske and published by William Andrew. This book was released on 2015-01-09 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a major lack of fundamental knowledge and understanding on the interaction between a filler and the polymer matrix. When it comes to nanoscale fillers, such as layered silicates, carbon nanotubes, graphene or cellulose nanofibers it is even more important to know accurate structure-property relationships as well as identifying the parameters influencing material behavior. The reason for the lack of knowledge on how to process nanocomposites and why there are so few applications is that several scientific fields are affected and a joint effort of those scientific communities involved is necessary – starting from the filler manufacturing or pre-processing over polymer chemistry to the polymer processing. In Polymer Nanoclay Composites, all involved scientific areas are viewed together for the first time, providing an all-embracing coverage of all stages of polymer clay nanocomposites processing from lab-scale to industrial scale – stages from the raw material over manufacturing of polymer clay nanocomposites to characterization and the final products. Readers will gain insight in the physical/chemical pre-processing of layered silicates and their incorporation into a polymer matrix using sophisticated technologies (such as advanced compounding) as well as in real-time quality control of the nanocomposite production and future prospects. The book also describes nanotoxicological and nanosafety aspects. - Covers the whole processing route with all aspects of the nanocomposites industry with particular focus on the processing of polymer clay nanocomposites - Includes quality control and nanosafety - Multidisciplinary approach from an industrial perspective

Download or read book Electrospun Nanofibers written by Mehdi Afshari and published by Woodhead Publishing. This book was released on 2016-09-13 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrospun Nanofibers covers advances in the electrospinning process including characterization, testing and modeling of electrospun nanofibers, and electrospinning for particular fiber types and applications. Electrospun Nanofibers offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science. Electrospinning is the most commercially successful process for the production of nanofibers and rising demand is driving research and development in this field. Rapid progress is being made both in terms of the electrospinning process and in the production of nanofibers with superior chemical and physical properties. Electrospinning is becoming more efficient and more specialized in order to produce particular fiber types such as bicomponent and composite fibers, patterned and 3D nanofibers, carbon nanofibers and nanotubes, and nanofibers derived from chitosan. - Provides systematic and comprehensive coverage of the manufacture, properties, and applications of nanofibers - Covers recent developments in nanofibers materials including electrospinning of bicomponent, chitosan, carbon, and conductive fibers - Brings together expertise from academia and industry to provide comprehensive, up-to-date information on nanofiber research and development - Offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science

Download or read book 2D Monoelements written by Inamuddin and published by John Wiley & Sons. This book was released on 2020-12-30 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2D Monoelements: Properties and Applications explores the challenges, research progress and future developments of the basic idea of two-dimensional monoelements, classifications, and application in field-effect transistors for sensing and biosensing. The thematic topics include investigations such as: Recent advances in phosphorene The diverse properties of two-dimensional antimonene, of graphene and its derivatives The molecular docking simulation study used to analyze the binding mechanisms of graphene oxide as a cancer drug carrier Metal-organic frameworks (MOFs)-derived carbon (graphene and carbon nanotubes) and MOF-carbon composite materials, with a special emphasis on the use of these nanostructures for energy storage devices (supercapacitors) Two-dimensional monoelements classification like graphene application in field-effect transistors for sensing and biosensing Graphene-based ternary materials as a supercapacitor electrode Rise of silicene and its applications in gas sensing