Download or read book Stabilization of Colloidal Dispersions by Polymer Adsorption written by Tatsuo Sato and published by . This book was released on 1980 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stabilization of Colloidal Dispersions by Polymer Absorption written by and published by . This book was released on 1980* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymeric Stabilization of Colloidal Dispersions written by Donald H. Napper and published by . This book was released on 1983 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Theory of the Stabilization of Colloidal Dispersions by Adsorbed Macromolecules written by Frans Theodoor Hesselink and published by . This book was released on 1971 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory of Colloidal Stabilization by Unattached Polymers written by Alexey Shvets and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stable colloidal dispersions with evenly distributed particles are important for many technological applications. Due to Brownian motion colloidal particles have constant collisions with each other which often lead to their aggregation driven by the long range van der Waals attraction. As a result the colloidal systems often tend to precipitate. A number of methods have been devised to minimize the effect of long-range van der Waals attraction between colloidal particles or to override the influence of the attraction in order to provide the colloidal stability.In the PhD thesis we investigated the colloidal stabilization in solutions of free polymers which is commonly referred to as depletion stabilization. Previous theoretical studies of free-polymer induced (FPI) stabilization were based on oversimplified models involving uncontrolled approximations. Even the most basic features of the depletion stabilization phenomenon were unknown. It was unclear how the PI repulsion depends on the solution parameters, polymer structure and monomer/surface interactions.The free polymer chains were modeled as random walks in a self-consistent molecular field that satisfied to diffusion-like integro-differential equation. As the molecular field we used the chemical potential that for semi-dilute polymer solution can be represented as a virial expansion where we took into account only second and third virial coefficients of the polymer solution. Varying the parameters like polymer stiffness, polymer length, polymer concentration and solvent regime (like theta solvent) whether it is for purely repulsive colloidal surface, adsorbed surface or surface with grafted polymer layer we were able to enhance the repulsive barrier due to the free polymers between the particles and therefore found conditions for kinetic stabilization of the system.
Download or read book Modeling Polymer colloid Phase Behavior written by Naa Larteokor Quarcoo and published by . This book was released on 2007 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, we investigate the phase behavior of silica colloids in solution with two uncharged polymers, polyethylene oxide (PEO) and polyvinylpyrrolidone (PVP), with the values of Rg/R = 0.7 and 1.8 for each polymer. The four observed phase boundaries are related to the polymer characteristics of Rg and entanglement concentration (c*). The polymer properties were characterized by viscometry, light scattering and size exclusion chromatography. The experimental observations suggest that phase separation depends on the ratio of the polymer concentration to the entanglement concentration for a given polymer.
Download or read book Colloidal Dispersions written by James William Goodwin and published by . This book was released on 1980 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer Adsorption and Dispersion Stability written by and published by . This book was released on 1984 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stabilization of Colloidal Dispersions with Polyelectrolytes written by B. K. Hamilton and published by . This book was released on 1999 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aqueous Polymer Dispersions written by Klaus Tauer and published by Springer. This book was released on 2014-01-15 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The incessantly interest in aqueous polymer dispersions (APD) since more than 90 years can be related to the almost unlimited possibilities to tailor APD to specific needs. These proceedings from an international symposium on "Polymer Colloids: Preparation & Properties of Aqueous Polymer Dispersions" held at the Swabian Conference Center (Kloster Irsee, Germany) witness this statement. The 33 contributions cover important aspects of APD such as control of particle size and stabilization, different polymerization technologies, applications as binders, paints, or as supports for proteins and hence, span the whole range from academic to practical.
Download or read book Concentrated Dispersions written by American Chemical Society. Division of Colloid and Surface Chemistry and published by . This book was released on 2004 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers many aspects concerning the preparation, characterization, stabilization, and behavior of concentrated colloidal dispersion and presents the most recent advances in experimental techniques and theoretical methods for studying concentrated colloidal dispersions.
Download or read book Aqueous Polymer Dispersions written by Klaus Tauer and published by Springer. This book was released on 2004-06-14 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The incessantly interest in aqueous polymer dispersions (APD) since more than 90 years can be related to the almost unlimited possibilities to tailor APD to specific needs. These proceedings from an international symposium on "Polymer Colloids: Preparation & Properties of Aqueous Polymer Dispersions" held at the Swabian Conference Center (Kloster Irsee, Germany) witness this statement. The 33 contributions cover important aspects of APD such as control of particle size and stabilization, different polymerization technologies, applications as binders, paints, or as supports for proteins and hence, span the whole range from academic to practical.
Download or read book Understanding Drug Release and Absorption Mechanisms written by Mario Grassi and published by CRC Press. This book was released on 2006-12-26 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for better reliability from drug delivery systems has caused designers and researchers to move away from trial-and-error approaches and toward model-based methods of product development. Developing such models requires cross-disciplinary physical, mathematical, and physiological knowledge. Combining these areas under a single cover, Under
Download or read book Polymer Stabilization of Non aqueous Dispersions written by Peter J. Achorn and published by . This book was released on 1970 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer Reaction Engineering of Dispersed Systems written by Werner Pauer and published by Springer. This book was released on 2018-11-19 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Advances in Polymer Science presents critical reviews of the present and future trends in polymer and biopolymer science. It covers all areas of research in polymer and biopolymer science including chemistry, physical chemistry, physics, material science.The thematic volumes are addressed to scientists, whether at universities or in industry, who wish to keep abreast of the important advances in the covered topics.Advances in Polymer Science enjoys a longstanding tradition and good reputation in its community. Each volume is dedicated to a current topic, and each review critically surveys one aspect of that topic, to place it within the context of the volume. The volumes typically summarize the significant developments of the last 5 to 10 years and discuss them critically, presenting selected examples, explaining and illustrating the important principles, and bringing together many important references of primary literature. On that basis, future research directions in the area can be discussed. Advances in Polymer Science volumes thus are important references for every polymer scientist, as well as for other scientists interested in polymer science - as an introduction to a neighboring field, or as a compilation of detailed information for the specialist.Review articles for the individual volumes are invited by the volume editors. Single contributions can be specially commissioned.Readership: Polymer scientists, or scientists in related fields interested in polymer and biopolymer science, at universities or in industry, graduate students
Download or read book Colloidal Dispersions written by William Bailey Russel and published by Cambridge University Press. This book was released on 1991 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the physical side of colloidal science from the individual forces acting between particles smaller than a micrometer that are suspended in a liquid, through the resulting equilibrium and dynamic properties. A variety of internal forces both attractive and repulsive act in conjunction with Brownian motion and the balance between them all decides the phase behaviour. On top of this various external fields, such as gravity or electromagnetic fields, diffusion and non-Newtonian rheology produce complex effects, each of which is of important scientific and technological interest. The authors aim to impart a sound, quantitative understanding based on fundamental theory and experiments with well-characterised model systems. This broad grasp of the fundamentals lends insight and helps to develop the intuitive sense needed to isolate essential features of the technological problems and design critical experiments. The main prerequisites for understanding the book are basic fluid mechanics, statistical mechanics and electromagnetism, though self contained reviews of each subject are provided at appropriate points. Some facility with differential equations is also necessary. Exercises are included at the end of each chapter, making the work suitable as a textbook for graduate courses in chemical engineering or applied mathematics. It will also be useful as a reference for individuals in academia or industry undertaking research in colloid science.
Download or read book Formation of Colloidal Dispersions of Polymer Materials in Aqueous Media by Solvent Shifting written by Zhengnan Yang and published by . This book was released on 2014 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adding poor solvent for polymer in the polymer solution will lead to shift in solubility and eventually phase separation, which refers to the solvent-shifting process. During this process it has been observed that relatively uniform size of polymer particles are formed. The formation of these polymeric nanoparticles have been assumed to follow a well-known "Ouzo Effect" that was previously used to explain the formation of nanoparticles of small-molecule organic molecules. This is also referred to as homogeneous nucleation. This approach has been used by many research groups to prepare particles of different sizes using polymers such as poly (lactic acid), polystyrene, and poly (methyl methacrylate). However, the assumed homogeneous nucleation mechanism for the solvent-shifting process has not been proved with obvious evidences. In this research we have studied very dilute concentration of non-solvent to capture the early stages of concentration fluctuation and the formation of nucleation by dynamic light scattering. Small increasing of the scattering light together with 1~3 nm peak were observed at the early stage as adding water drop wise into PMMA/THF solution before PMMA nanoparticles were formed. Hypothesis and questions of the mechanism of the formation of polymer nanoparticle were carefully discussed in this article.
