Download or read book An Investigation Onto the Adsorption Properties of Random Copolymers to the Solid liquid Interface written by Brian John Clifton and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation Into the Adsorption Properties of Random Copolymers at the Solid liquid Interface written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Adsorption of a Random Copolymer at the Solid liquid Interface written by N. A. Finch and published by . This book was released on 1988 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Regular and Random Copolymer Adsorption at Solid liquid Interfaces written by Edward Hovsep Maraachlian and published by . This book was released on 2002 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis the adsorption of copolymers at liquid interfaces is studied. General background on the subject is given. Then two different models, the continuum and lattice, are introduced. The two models are compared and the lattice model is chosen in order to do further calculations. The random and regular copolymers that we used were made up of two types of monomers type A and type B. Type B monomers are assumed not to interact with the wall and only the A-type monomers interact. The matrix method was used in order to calculate the critical energies and adsorption layer thickness. It was observed that the critical energies of random copolymers are less than the critical energies of regular copolymers of the same composition. The values of the critical energies were close to the one predicted by the mean energy model for large values of the fraction of A-type monomers.--The numerical results are compare to analytic predictions. The mean energy model was used to find the energy of attraction of the wall at which a homopolymer will be equivalent to a regular or random copolymer whose A-type monomers interact with the wall by energy EA. We compared our results to these predictions and determined the range applicability of this model. In general the agreement was good only for concentrations of A monomers greater than a certain value. Regular and random copolymers, in the region of strong adsorption, showed differences in the structure of the adsorbed layer.

Download or read book Nanophenomena at Surfaces written by Michail Michailov and published by Springer Science & Business Media. This book was released on 2011-02-24 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of the art in nanoscale surface physics. It outlines contemporary trends in the field covering a wide range of topical areas: atomic structure of surfaces and interfaces, molecular films and polymer adsorption, biologically inspired nanophysics, surface design and pattern formation, and computer modeling of interfacial phenomena. Bridging "classical" and "nano" concepts, the present volume brings attention to the physical background of exotic condensed-matter properties. The book is devoted to Iwan Stranski and Rostislaw Kaischew, remarkable scientists, who played a crucial role in setting up the theoretical fundamentals of nucleation and crystal growth phenomena in the last century.

Download or read book Paper Chemistry written by J.C. Roberts and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the title of this book is Paper Chemistry, it should be considered as a text about the chemistry of the formation of paper from aqueous suspensions of fibre and other additives, rather than as a book about the chemistry of the raw material itself. It is the subject of what papermakers call wet-end chemistry. There are many other excellent texts on the chemistry of cellulose and apart from one chapter on the accessibility of cellulose, the subject is not addressed here. Neither does the book deal with the chemistry of pulp preparation (from wood, from other plant sources or from recycled fibres), for there are also many excellent texts on this subject. The first edition of this book was a great success and soon became established as one of the Bibles of the industry. Its achievement then was to collect the considerable advances in understanding which had been made in the chemistry of papermaking in previous years, and provide, for the first time, a sound physico chemical basis of the subject. This new edition has been thoroughly updated with much new material added. The formation of paper is a continuous filtration process in which cellulosic fibres are formed into a network which is then pressed and dried. The important chemistry involved in this process is firstly the retention of col loidal material during filtration and secondly the modification of fibre and sheet properties so as to widen the scope for the use of paper and board products.

Download or read book A Study of the Adsorption of a Randon Copolymer at the Solid liquid Interface written by N. A. Finch and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Block Copolymer Adsorption at the Solid liquid Interface written by Mark R. Munch and published by . This book was released on 1989 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adsorption Study of Block Copolymers at Solid liquid Interfaces written by Jabir Ali Shar and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adsorption of Block Copolymers at the Solid liquid Interface and Their Effects on Colloidal Stability written by Julie Bennett and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 1997 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.

Download or read book Structure and Functional Properties of Colloidal Systems written by Roque Hidalgo-Alvarez and published by CRC Press. This book was released on 2009-11-18 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating fundamental research with the technical applications of this rapidly evolving field, Structure and Functional Properties of Colloidal Systems clearly presents the connections between structure and functional aspects in colloid and interface science. It explores the physical fundamentals of colloid science, new developments of synthesis

Download or read book Indian Journal of Chemistry written by and published by . This book was released on 1997 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Understanding the Adsorption at Solid Liquid Interface and Its Consequences on Interfacial Phenomena written by Nishad Dhopatkar and published by . This book was released on 2017 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical adsorption at solid-liquid interface is an effective way to dynamically alter the surface properties text/italics{in-situ} and is prevalent in biology, geoscience, biotechnology, catalysis, food processing, agriculture, textiles, coatings, adhesives and lubricants, and cosmetics Over the last century an extensive framework of the thermodynamics and kinetics of adsorption as well as the intermolecular forces that govern the physical interactions between the substrate, solute, and solvent has been established, helping elucidate the structure of adsorbates. However, there lacks an understanding of the connection between the local conformation of the adsorbed molecules and its influence on the macroscopic interfacial phenomena. In this research we have employed vibrational spectroscopy techniques namely the interface-selective non-linear sum frequency generation (SFG) and linear attenuated total reflectance Fourier transform infrared (ATR-FTIR) in conjugation with contact mechanics to develop the molecular level insights into macroscopic phenomena of wetting, adhesion, and sliding friction. We study the interfacial structure of small molecules (surfactants and solvents) as well as macromolecules adsorbed on model surfaces of sapphire (aluminum oxide) and silicone dioxide. Using SFG, we discovered a strongly coordinated ice-like water layer confined between two charged surfaces, under hydration pressures, formed by the adsorption of a cationic surfactant (cetyl trimethyl ammonium bromide, CTAB) on dissimilar hydrophobic surfaces (phenylethyl trichlorosilane, PETS self-assembled monolayer, and polydimethylsiloxane elastomer, PDMS). This strongly coordinated water structure forms past the surfactant concentration needed for a monolayer surface coverage and is observed to reduce the sliding friction. Correlating interface-selective spectroscopy with hydration forces, and their macroscopic manifestation on adhesion and friction requires us to reconsider how we understand water under confinement and its significance in more complicated interfacial processes prevalent in biology, chemistry, and engineering. To investigate the adsorption of a basic polymer (PMMA) on acidic surfaces in carbon tetrachloride (neutral), Chloroform (acidic), and acetone (basic) solvents, we used SFG and ATR-FTIR to build on to the established concept of acid-base interactions that explains limited adsorption from basic and acidic solutions compared to neutral solution due to competitive interactions. We show that besides the differences in adsorbed amount, chains adsorbed from an acidic solvent adopt a flat conformation with a much smaller ratio of segments of loops and tails to trains compared to those adsorbed from a neutral solvent. Surface interaction parameters alone cannot predict the differences in conformation of chains adsorbed from acidic or neutral solvents. Such differences in the static and dynamic conformations have consequences in understanding the exchange kinetics, colloidal stabilization, chromatographic separations, adhesion and friction, and stabilization of nanocomposites. The adsorption of polyelectrolytes driven by Coulombic interactions becomes complicated when mixed with oppositely charged surfactant which modulates the net charge and solubility of polyelectrolytes in water resulting in a characteristic bulk phase diagram. We have investigated the adsorption from pre-mixed solutions of a cationic polysaccharide (PQ10) and the anionic surfactant sodium dodecyl sulfate (SDS), on an amphoteric alumina surface using quartz crystal microbalance with dissipation (QCMD). By tuning the surface charge of the amphoteric alumina, we confirmed the importance of electrostatic interactions on the adsorption on a hydrophilic charged surface, a suggestion that was made earlier solely based on the measurements on negatively charged surfaces. We also directly correlate the bulk phase transitions at the interface adsorption by observing a maximum extent of adsorption on both negatively and positively charged surfaces from a solution corresponding to the maximum turbidity. Using the Voight based viscoelastic model, QCMD also provided information on the viscosity, shear modulus, and thickness of the adsorbed polymeric complex, findings of which were corroborated by underwater atomic force microscopy (AFM) measurements. Shifting gears from adsorption to understanding the polymer thin films surface structure in different environments, we used SFG to observe the surface restructuring of an amphiphilic glassy homopolymer poly(alpha-hydroxy-n-butyl acrylate, PHNB) from hydrophobic to aqueous environment. We observed relative changes in ordering of hydrophobic and hydroxyl pendant groups upon going from air to water at different temperatures showing their impact on wetting of the polymer surface observed by means of dynamic contact angles measurement.

Download or read book Probing Polymer Adsorption at the Solid liquid Interface with Particle Film ATR FTIR Spectroscopy written by Linh Cuba-Chiem and published by . This book was released on 2007 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric depressant adsorption on the surface of talc was investigated using in situ Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) Spectroscopy. The polymeric depressants investigated were an unmodified polyacrylamide (Polymer-N) and a hydroxyl substituted polyacrylamide (Polymer-H), an unmodified dextrin (Dextrin WY) and a hydroxylpropyl substituted dextrin (HP Dextrin), and carboxymethyl cellulose (CMC). The main objectives of this study were to evaluate the thermodynamic properties of adsorption, the kinetics of adsorption and desorption, and the mechanisms driving adsorption.

Download or read book Biopolymers at Interfaces Second Edition written by Martin Malmsten and published by CRC Press. This book was released on 2003-01-15 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition features research from nearly 60 of the profession's most distinguished international authorities. Recognizing emerging developments in biopolymer systems research with fully updated and expanded chapters, the second edition discusses the biopolymer-based multilayer structures and their application in biosensors, the progress made in the understanding of protein behaviour at the air-water interface, experimental findings in ellipsometry and reflectometry, and recent developments concerning protein interfacial behaviour in microfabricated total analysis systems and microarrays. With over 3000 references, this is an essential reference for professionals and students in surface, pharmaceutical, colloid, polymer, and medicinal chemistry; chemical, formulation, and application engineering; and pharmacy.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt: