Download or read book Kinetics Structure and Dynamics of Block Copolymer Nanoparticles Prepared Via RAFT Dispersion Polymerisation written by Erik Jan Cornel and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Block Copolymer Nanoparticles Prepared by RAFT Aqueous Polymerisation written by Charlotte Morse and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Polymer Nanoparticles written by Vikas Mittal and published by CRC Press. This book was released on 2010-07-13 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer latex particles continue to become increasingly important in numerous commercial applications. Advanced synthesis techniques are the key to developing new functionality for nanoparticles. These methods make it possible to tailor the size, chemical composition, or properties of these particles, as well as the molecular weight of the polymer

Download or read book Nanoparticle Dispersions in Polymers written by Qiang Lan and published by . This book was released on 2007 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soft Nanoparticles for Biomedical Applications written by José Callejas-Fernández and published by Royal Society of Chemistry. This book was released on 2014-06-18 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoparticles are attractive for many biomedical applications such as imaging, therapeutics and diagnostics. This new book looks at different soft nanoparticles and their current and potential uses in medicine and health including magnetoliposomes, micro/nanogels, polymeric micelles, DNA particles, dendrimers and bicelles. Each chapter provides a description of the synthesis of the particles and focus on the techniques used to characterize the size, shape, surface charge, internal structure, and surface microstructure of the nanoparticles together with modeling and simulation methods. By giving a strong physical-chemical approach to the topic, readers will gain a good background into the subject and an overview of recent developments. The multidisciplinary point of view makes the book suitable for postgraduate students and researchers in physics, chemistry, and biology interested in soft matter and its uses.

Download or read book Block Copolymers in Nanoscience written by Massimo Lazzari and published by Wiley-VCH. This book was released on 2007-06-27 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first book to take a detailed look at one of the key focal points where nanotechnology and polymers meet provides both an introductory view for beginners as well as in-depth knowledge for specialists in the various research areas involved. It investigates all types of application for block copolymers: as tools for fabricating other nanomaterials, as structural components in hybrid materials and nanocomposites, and as functional materials. The multidisciplinary approach covers all stages from chemical synthesis and characterization, presenting applications from physics and chemistry to biology and medicine, such as micro- and nanolithography, membranes, optical labeling, drug delivery, as well as sensory and analytical uses.

Download or read book RAFT Polymerization 2 Volume Set written by Graeme Moad and published by John Wiley & Sons. This book was released on 2022-03-14 with total page 1283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore this one-stop resource for reversible addition-fragmentation chain transfer polymerization from a leading voice in chemistry RAFT Polymerization: Methods, Synthesis and Applications delivers a comprehensive and insightful analysis of reversible addition-fragmentation chain transfer polymerization (RAFT) and its applications to fields as diverse as material science, industrial chemistry, and medicine. This one-stop resource offers readers a detailed synopsis of the current state of RAFT polymerization. This text will inspire further research and continue the drive to an ever-increasing range of applications by synthesizing and explaining the more central existing literature on RAFT polymerization. It contains a beginner’s guide on how to do a RAFT polymerization before moving on to much more advanced techniques and concepts, like the kinetics and mechanisms of the RAFT process. The distinguished editors have also included resources covering the four major classes of RAFT agents and recent developments in processes for initiating RAFT polymerization. Readers will also benefit from the inclusion of: A thorough introduction to the mechanisms, theory, and mathematical modeling of RAFT Explorations of RAFT agent design and synthesis, dithioesters, dithiobenzoates, trithiocarbonates, xanthates, dithiocarbamates, macromonomer RAFT, and RAFT copolymerization Discussions of a variety of RAFT architectures, including multiblocks, combs, hyperbranched polymers, and stars Treatments of end group transformation, cationic RAFT, high-throughput RAFT, and RAFT in continuous flow An examination of sequence defined polymers by RAFT Perfect for organic chemists, polymer chemists, and materials scientists, RAFT Polymerization: Methods, Synthesis and Applications will also earn a place in the libraries of chemical engineers seeking a one-stop reference for this method of controlled radical polymerization with a wide range of applications in multiple areas.

Download or read book Nanolubricants written by Jean Michel Martin and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The technology involved in lubrication by nanoparticles is a rapidly developing scientific area and one that has been watched with interest for the past ten years. Nanolubrication offers a solution to many problems associated with traditional lubricants that contain sulphur and phosphorus; and though for some time the production of nanoparticles was restricted by the technologies available, today synthesis methods have been improved to such a level that it is possible to produce large quantities relatively cheaply and efficiently. Nanolubricants develops a new concept of lubrication, based on these nanoparticles, and along with the authors’ own research it synthesises the information available on the topic of nanolubrication from existing literature and presents it in a concise form. Describes the many advantages and potential applications of nanotechnology in the tribological field. Offers a full review of the state-of-the-art as well as much original research that is yet unpublished. Includes sections on boundary lubrication by colloïdal systems, nanolubricants made of metal dichalcogenides, carbon-based nanolubricants, overbased detergent salts, nanolubricants made of metals and boron-based solid nanolubricants and lubrication additives. Authored by highly regarded experts in the field with contributions from leading international academics. Nanolubricants will appeal to postgraduate students, academics and researchers in mechanical engineering, chemical engineering and materials science. It should also be of interest to practising engineers with petroleum companies and mechanical manufacturers.

Download or read book Light Scattering from Polymer Solutions and Nanoparticle Dispersions written by Wolfgang Schärtl and published by Springer Science & Business Media. This book was released on 2007-08-13 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light scattering is a very powerful method for characterizing the structure of polymers and nanoparticles in solution. As part of the Springer Laboratory series, this book provides a simple-to-read and illustrative textbook probing the seemingly very complicated topic of light scattering from polymers and nanoparticles in dilute solution, and goes further to cover some of the latest technical developments in experimental light scattering.

Download or read book Single Chain Polymer Nanoparticles written by José A. Pomposo and published by John Wiley & Sons. This book was released on 2017-08-29 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first book on this important and emerging topic presents an overview of the very latest results obtained in single-chain polymer nanoparticles obtained by folding synthetic single polymer chains, painting a complete picture from synthesis via characterization to everyday applications. The initial chapters describe the synthetics methods as well as the molecular simulation of these nanoparticles, while subsequent chapters discuss the analytical techniques that are applied to characterize them, including size and structural characterization as well as scattering techniques. The final chapters are then devoted to the practical applications in nanomedicine, sensing, catalysis and several other uses, concluding with a look at the future for such nanoparticles. Essential reading for polymer and materials scientists, materials engineers, biochemists as well as environmental chemists.

Download or read book Kinetic Assembly of Block Copolymers in Solution Helical Cylindrical Micelles and Patchy Nanoparticles written by Sheng Zhong and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There is always an interest to understand how molecules behave under different conditions. One application of this knowledge is to self-assemble molecules into increasingly complex structures in a simple fashion. Self-assembly of amphiphilic block copolymer in solution has produced a large variety of nanostructures through the manipulation in polymer chemistry, assembly environment, and additives. Moreover, some reports suggest the formation of many polymeric assemblies is driven by kinetic process. The goal of this dissertation is to study the influence of kinetics on the assembly of block copolymer. The study shows kinetic control can be a very effective way to make novel polymeric nanostructures. Two examples discussed here are helical cylindrical micelles and patchy nanoparticles. Helical cylindrical micelles are made from the co-assembly of amphiphilic triblock copolymer poly(acrylic acid)- block -poly(methyl acrylate)- block -polystyrene and organoamine molecules in a mixture of tetrahydrofuran (THF) and water (H 2 O). This system has already shown promise of achieving many assembled structures. The unique aspects about this system are the use of amine molecules to complex with acid groups and the existence of cosolvent system. Application of amine molecules offers a convenient control over assembled morphology and the introduction of PMA-PS selective solvent, THF, promotes the mobility of the polymer chains. In this study, multivalent organoamine molecules, such as diethylenetriamine and triethylenetetramine, are used to interact with block copolymer in THF/water mixture. As expected, the assembled morphologies are dependent on the polymer architecture, selection and quantity of the organoamine molecules, and solution composition. Under the right conditions, unprecedented, multimicrometer-long, supramolecular helical cylindrical micelles are formed. Both single-stranded and double-stranded helices are found in the same system. These helical structures share uniform structural parameters, including the width of the micelles, width of the helix, and the pitch distance. There is no preference to the handedness, and both handednesses are observed, which is understandable since there are no chiral molecules or specific binding effects applied during the assembly. The helical structure is a product of kinetic process. Cryogenic transmission electron microscopy has been employed to monitor the morphological transformation. The study indicates there are two complicated but reproducible kinetic pathways to form the helices. One pathway involves the stacks of bended cylinders at early stages and the subsequent interconnection of these bended cylinders. Spherical micelles bud off of the interconnected nanostructure as the final step towards a defect-free helix. Another kinetic pathway shows very short helices are formed at first and aligned via head-to-tail style in the solution, and the subsequent sequential addition of these short helices results in prolonged mature helices. By using a ninhydrin-staining technique, amine molecules within the micellar corona are visualized and confirmed to preferentially locate in the inner side of the helical turns. The aggregation of amine molecules provides a strong attraction force due to electrostatic association between oppositely charged amine and acid groups and accumulation of hydrogen bonding among amine molecules to coil the cylindrical micelles into helical twisting features which are stabilized by the repulsion forces due to the chain packing frustration within the hydrophobic core, steric hindrance of amine molecules as well as the Coulomb repulsion of the excess charged amine groups. The formation mechanism of the helix offers the feasibility to manipulate the helical pitch distance and formation kinetics. The helical pitch distance can be enlarged or shrunk by varying the type and amount of amine molecules used in assembly, introducing inorganic salts, and changing pH. Luckily, the helical structure can be preserved permanently by inducing the amide reaction between amine and carboxylic acid groups. The kinetics of the helix is also subject to many factors, including used amine molecules, inorganic salts and preparation procedure. The aging time for the helix can be either reduced or prolonged. Furthermore, even though the helical formation is pathway-dependent, helical formation can still be triggered from extended cylindrical micelles or stacks of disklike micelles as long as a right condition is applied. Another strategy for kinetic assembly of block copolymer is presented as well. A novel patchy nanoparticle has been produced following this strategy. The patches are formed on the surface of polymeric colloids due to the phase separation of two chemically unlike segments. Certain level of mobility of the polymer chains is required for the blocks to segregate into patches. More importantly, the number and distribution geometry of the patches are related to the particle size. Future efforts are needed to control the particle size in order to manufacture uniform nanoparticles with desired patch patterns for the applications in nanotechnology, drug delivery and nanodevices.

Download or read book Miktoarm Star Polymers written by Ashok Kakkar and published by Royal Society of Chemistry. This book was released on 2017-04-13 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term ‘miktoarm polymers’ refers to asymmetric branched macromolecules, a relatively new entry to the macromolecular field. Recent advances in their synthesis and intriguing supramolecular chemistry in a desired medium has seen a fast expansion of their applications. The composition of miktoarm polymers can be tailored and even pre-defined to allow a desired combination of functions, meaning polymer chemists can have complete control of the overall architecture of these macromolecules. By carefully selecting the composition, they can create supramolecular structures with intriguing properties, particularly for applications in biology. Miktoarm Star Polymers features chapters from experts actively working in this field, and provides the reader with a unique introduction to the fundamental principles of this exciting macromolecular system. Topics covered include the design, synthesis, characterization, self-assembly and applications of miktoarm polymers. The book is an excellent overview and up to date guide to those working in research in polymer chemistry, materials science, and polymers for medical applications.

Download or read book Novel Block Copolymer Nanoparticles Via RAFT Aqueous Emulsion Polymerization written by Amy Cockram and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Block Copolymer Nanostructures Via Self assembly for Biomedical Applications written by Fabian Sobotta and published by . This book was released on 2022* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functional block copolymer nanostructures of defined morphologies were designed and the influence of their structural characteristics, such as shape and stability on the biomedical properties was investigated. Amphiphilic block copolymers were synthesized via sequential RAFT polymerization or polymer-polymer coupling of different polymers and subsequently self-assembled into nanostructures. Furthermore, simultaneous block copolymerization and self-assembly were performed using polymerization-induced self-assembly (PISA) technique. Control over the morphology formation was gained through careful tuning of the formulation conditions. Therefore, systematic correlations between the conditions and the evolution of higher-ordered morphologies based on kinetic effects were revealed. The opportunity to stabilize and selectively destabilize the particles via core-crosslinking and core-oxidation was introduced and their potential to prevent a premature immune response or induce a selective release of encapsulated cargo was demonstrated. In addition, it could be shown that the particle shape represents a crucial factor for the selective uptake of nanostructures in inflamed intestinal tissue. This thesis emphasizes the huge potential of kinetically controlled block copolymer self-assembly for the preparation of tailor-made nanomaterials, which may serve as next-generation therapeutics, as well as reveal general relationships between the particle structure and their biomedical properties.

Download or read book Polymer Particles written by Masayoshi Okubo and published by Springer Science & Business Media. This book was released on 2005-02-10 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this special volume on polymer particles, recent trends and developments in the synthesis of nano- to micron-sized polymer particles by radical polymerization (Emulsion, Miniemulsion, Microemulsion, and Dispersion Polymerizations) of vinyl monomers in environmentally friendly heterogeneous aqueous and supercritical carbon dioxide fluid media are reviewed by prominent worldwide researchers. In addition to the important challenges and possibilities with regards to design and preparation of functionalized polymer particles of controlled size, the topics described are of great current interest due to the increased awareness of environmental issues.

Download or read book Synthesis and Characterisation of Stimulus responsive Diblock Copolymer Nano objects Prepared by RAFT Aqueous Dispersion Polymerisation written by Sarah Wilson and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Organized Nanostructures of Thermoresponsive Poly N isopropylacrylamide Block Copolymers Obtained Through Controlled RAFT Polymerization written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Controlled radical polymerization techniques, such as RAFT polymerization, are modern alternatives for preparing pre-designed polymers. In RAFT polymerization, chain length, molar mass distribution, microstructure (tacticity and sequencing), composition and functionality can be controlled. This allows the synthesis of a variety of novel polymer architectures, such as block and graft copolymers, stars, hybride materials and bioconjugates. The self-organization of synthetic preformed polymers into controllable nanostructures is one of the most promising topics in the material science. However, the field of block copolymer self-assembly is still relatively young and current polymeric materials are structurally rather simple compared to biological materials. Thus, novel generations of polymer-based materials offer huge opportunities in material science. In this work, amphiphilic di- and triblock copolymers were synthesized by RAFT polymerization, and their organization into specific structures at nanoscale was studied. In all the block copolymer, one of the blocks was thermoresponsive poly(N-isopropylacrylamide). Thus, polymers and studied materials were temperature sensitive. In addition, control over tacticity in N-isopropylacrylamide polymerization was studied. The self-organization in aqueous solutions was strongly affected by the tacticity and the block sequence. Amphiphilic polymers formed various micellar structures in aqueous solutions. These micellar microcontainers have applications in controlled drug delivery. Amphiphiles have also applications as dispersants in coatings and cosmetics. In bulk, all the stable block copolymer morphologies were observed for triblock copolymers. Hydrogels of triblock copolymers can be used as thermoresponsive membrane materials. Polymers synthesized through the RAFT polymerization can be directly used in the synthesis of polymer grafted nanoparticles. Gold nanoparticles have attracted great interest due to the fact that gold is t