Download or read book Self association and Surface Adsorption of Triblock Copolymers written by Mai T. Nguyen-Misra and published by . This book was released on 1995 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Block Copolymers in Solution written by Ian W. Hamley and published by John Wiley & Sons. This book was released on 2005-09-02 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique text discusses the solution self-assembly of block copolymers and covers all aspects from basic physical chemistry to applications in soft nanotechnology. Recent advances have enabled the preparation of new materials with novel self-assembling structures, functionality and responsiveness and there have also been concomitant advances in theory and modelling. The present text covers the principles of self-assembly in both dilute and concentrated solution, for example micellization and mesophase formation, etc., in chapters 2 and 3 respectively. Chapter 4 covers polyelectrolyte block copolymers - these materials are attracting significant attention from researchers and a solid basis for understanding their physical chemistry is emerging, and this is discussed. The next chapter discusses adsorption of block copolymers from solution at liquid and solid interfaces. The concluding chapter presents a discussion of selected applications, focussing on several important new concepts. The book is aimed at researchers in polymer science as well as industrial scientists involved in the polymer and coatings industries. It will also be of interest to scientists working in soft matter self-assembly and self-organizing polymers.
Download or read book Adsorption Properties of Triblock Copolymers at Solid Surfaces written by Krister Eskilsson and published by . This book was released on 1999 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Self Assemble Behavior of Triblock Copolymers in Solution written by Imad Ud Din and published by LAP Lambert Academic Publishing. This book was released on 2011-12 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aqueous solutions of two triblock copolymers of poly(oxybutylene/oxyethylene /oxybutylene) were studied by surface tensiometry, viscometry and dynamic laser light scattering techniques at various temperatures (293, 303, 313 and 323K).Effect of block architecture and temperature on surface and miceller properties was also studied. Critical micelle concentration (CMC) and thermodynamics of micellization were determined by surface tensiometry. Surface activity of these triblock copolymers was studied by measuring surface parameter i.e surface pressure ( ), surface excess concentration ( ), area per molecule (oA), of polymer and standard Gibb's free energy of adsorption ( Gads) at different temperature. Miceller parameter like CMC, surface tension at CMC ( CMC) were determined. Thermodynamic parameters, standard free energy of micellization ( Gmic), standard entropy of micellization ( Smic) and enthalpy ( Hmic) was calculated from CMC value at different temperature.Viscometry was used to determine intrinsic viscosity ( ) and intermicellar interactions (KH) using Huggins's equation. Dynamic light scattering was used for determination of hydrodynamic radius (Rh)."
Download or read book Adsorption and Desorption Phenomena of PEO PPO PEO Triblock Copolymer Systems on Model Surfaces written by Pietro Brandani and published by . This book was released on 2002 with total page 222 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 2009 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Property Modification Via Block Copolymer Adsorption written by Ana Claudia Costa and published by . This book was released on 2003 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanobiomaterials written by Roger Narayan and published by Woodhead Publishing. This book was released on 2017-09-15 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanobiomaterials: Nanostructured materials for biomedical applications covers an extensive range of topics related to the processing, characterization, modeling, and biomedical applications of nanostructured ceramics, polymers, metals, composites, self-assembled materials, and macromolecules. Novel approaches for bottom-up and top-down processing of nanostructured biomaterials are highlighted. In addition, innovative techniques for characterizing the in vitro behavior and in vivo behavior of nanostructured biomaterials are considered. Applications of nanostructured biomaterials in dentistry, drug delivery, medical diagnostics, surgery and tissue engineering are examined. - Provides a concise description of the materials and technologies used in the development of nanostructured biomaterials - Provides industrial researchers with an up-to-date and handy reference on current topics in the field of nanostructured biomaterials - Includes an integrated approach that is used to discuss both the biological and engineering aspects of nanostructured biomaterials
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 Colloid and Interface Science in Pharmaceutical Research and Development written by Hiroyuki Ohshima and published by Elsevier. This book was released on 2014-07-23 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colloid and Interface Science in Pharmaceutical Research and Development describes the role of colloid and surface chemistry in the pharmaceutical sciences. It gives a detailed account of colloid theory, and explains physicochemical properties of the colloidal-pharmaceutical systems, and the methods for their measurement. The book starts with fundamentals in Part I, covering fundamental aspects of colloid and interface sciences as applied to pharmaceutical sciences and thus should be suitable for teaching. Parts II and III treat applications and measurements, and they explains the application of these properties and their influence and use for the development of new drugs. - Provides a clear description of the fundamentals of colloid and interface science relevant to drug research and development - Explains the physicochemical/colloidal basis of pharmaceutical science - Lists modern experimental characterization techniques, provides analytical equations and explanations on analyzing the experimental data - Describes the most advanced techniques, AFM (Atomic Force Microscopy), SFA (Surface Force Apparatus) in detail
Download or read book Nisin Adsorption to PEO PPO PEO Tri block Copolymer Layers and Its Resistance to Elution by Fibrinogen written by Matthew P. Ryder and published by . This book was released on 2009 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: While hydrophobic surfaces coated with the poly[ethylene oxide]-poly[propylene oxide]-poly[ethylene oxide] (PEO-PPO-PEO) surfactant Pluronic® F108 are highly resistant to plasma protein adsorption, the antimicrobial peptide nisin has been observed to adsorb in multilayer quantities at such surfaces, and the PEO chains themselves suggested to inhibit nisin exchange by blood proteins. But this had been investigated only with F108 bound by physical association between the hydrophobic surface and its apolar PPO block. In this work, nisin adsorption at hydrophobic, silanized silica surfaces coated with F108, and in separate experiments, coated with F108 that had been end-activated with nitrilotriacetic acid groups (EGAP-NTA), was detected in situ, by zeta potential measurements. The triblocks were covalently immobilized prior to the introduction of protein in each case. Zeta potential measurements were also used to evaluate fibrinogen adsorption, and the sequential adsorption behavior of nisin and fibrinogen, at bare hydrophobic and triblock-coated surfaces. Silica microspheres (1 [mu]m diameter) were silanized with either allyldimethylchlorosilane (ADCS) or trichlorovinylsilane (TCVS). Silanized microspheres were incubated overnight in a solution of F108 or EGAP-NTA to allow for self assembly of a PEO layer. Coated microspheres were then subjected to y-irradiation under water or in the presence of the triblock coating solution. Layer stability was quantified by its resistance to elution by SDS. Zeta potential changes indicated that pretreatment with TCVS, and y-irradiation performed in the presence of the triblock coating solution, produced more stable triblock layers than were produced with ADCS. For this reason silanization only with TCVS was used in protein adsorption experiments. Introduction of fibrinogen to triblock-coated microspheres showed little change in zeta potential, indicating the presence of a steric repulsive barrier to fibrinogen adsorption. Introduction of nisin to triblock-coated microspheres showed a significant increase in zeta potential, a result of adsorption of the cationic nisin. In sequential adsorption experiments, the introduction of fibrinogen to "nisin-loaded" triblock layers caused a decrease in the zeta potential, consistent with the net negative charge of fibrinogen. This decrease was substantially more pronounced for TCVS-modified silica in the absence of triblock coatings, suggesting an enhanced resistance to nisin elution owing to its location in the PEO layer.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1995 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adsorption Studies of Block Copolymers written by Edward Elbert Parsonage and published by . This book was released on 1991 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pharmaceutical Excipients written by Otilia M. Y. Koo and published by John Wiley & Sons. This book was released on 2016-10-03 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of excipients, their functionalities in pharmaceutical dosage forms, regulation, and selection for pharmaceutical products formulation. It includes development, characterization methodology, applications, and up-to-date advances through the perspectives of excipients developers, users, and regulatory experts. Covers the sources, characterization, and harmonization of excipients: essential information for optimal excipients selection in pharmaceutical development Describes the physico-chemical properties and biological effects of excipients Discusses chemical classes, safety and toxicity, and formulation Addresses recent efforts in the standardization and harmonization of excipients
Download or read book Functional Nanoporous Materials written by Christian Weinberger and published by MDPI. This book was released on 2020-06-23 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: With pore sizes up to 100 nm, the term "nanoporous" covers a wide range of material classes. A broad field of applications has arisen from the diversity of unique structures and properties of nanoporous materials. Recent research spans the range from fundamental studies of the behavior of atoms and molecules in confined space, creative synthetic pathways for novel materials, to applications in high-performance technologies. This Special Issue collects current studies about the progress in the development, characterization, and application of nanoporous materials, including (but not restricted to) mesoporous silica, carbon and metal oxides, porous coordination polymers, metal organic frameworks (MOFs), and covalent organic frameworks (COFs), as well as materials exhibiting hierarchical porosity. Their functionalities show promise for fields such as energy storage/conversion (e.g., photocatalysis and battery electrodes), sensing, catalysis, and their sorption properties for N2, CO2, NOx, or H2O, to name just a few.
Download or read book Interactions Between the Surface adsorbed PH tunable Di block Copolymer Poly 2 vinylpyridine Poly ethylene Oxide written by Scott McLean and published by . This book was released on 2007 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Self assembly of Functional Amphiphilic Triblock Copolymer Thin Films written by Namrata Salunke and published by . This book was released on 2018 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The concept of liquid wetting on solids is one of the most fundamental and fascinating phenomena understood in terms of physical chemistry, statistical physics, short and long-range forces, and fluid dynamics" - P. G. de Gennes. Monte Carlo simulations have shown that interfacial free energy between co-existing phases is strongly impacted by reducing system dimensionality, d, in thin films, the interfacial area ~L[superscript d-1]and linear dimension L[subscript z] cause logarithmic finite-size effects of order ln(L)/L[superscript d-1]and ln(L[subscript z])/L[superscript d-1]respectively. The unexplored coupling between these two phenomena in amphiphilic triblock copolymer systems forms the basis of this dissertation, with a view towards stimuli responsive properties of physico-chemical surfaces. This dissertation explores in detail the hypotheses conjoining these two phenomena in an amphiphilic triblock copolymer - FDF consisting of hydrophobic domain, F: poly(2-(N-ethylperfluorooctanesulfonamido) ethyl methylacrylate), and hydrophilic domain, D: poly(N,N'-dimethyl acrylamide) in thin film format. The effect of chemistry-based block copolymer phase separation and thin film confinement physics lead to a controlled wetting/non-wetting spatio-temporal transition in thin FDF films. Further, the effect of FDF film casting conditions, particularly the rate of solvent evaporation as well as annealing temperature and time were explored on surface phase-domain structure that allowed for control of the film wettability. A third aspect of the study examined the external stimuli response behavior of such systems via changes in film swelling, morphology and optical properties induced by humidity changes to which the block copolymer was strongly responsive. In situ grazing incidence small angle X-ray scattering (GISAXS) and specular reflectance experiments with controlled relative humidity (RH) were used to determine film and domain swelling in these amphiphilic copolymers. These results also indicated strong optical "artificial color" variation arising from the coupling of film finite-size interference. Confinement effects were observed to influence dynamic properties in FDF films including domain swelling and "active" structural color.
