Download or read book On the Adhesion Between Substrates Covered with Polyelectrolyte Multilayers written by Rikard Lingström and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines the formation of Polyelectrolyte Multilayers (PEM) on cellulose fibres as a new way of influencing the fibre surface and the adhesion between wood fibres. The aim of the study was to enhance the fundamental understanding of the adsorption mechanisms behind the formation of Polyelectrolyte Multilayers on cellulose fibres; to study how the properties of the layers can be influenced and to show how the properties of the layers influence the adhesion between the fibres and the strength of paper sheets made from the PEM treated fibres. Different polyelectrolyte systems are known to form PEMs with different properties, and in this work two different polymer systems were extensively studied: poly(dimethyldiallylammonium chloride) (PDADMAC) / poly(styrene sulphonate) (PSS), which are both strong polylectrolytes (i.e. are highly charged over a wide range of pH) and poly allylaminehydrochloride (PAH) /poly acrylic acid (PAA), which are both weak polyelectorlytes (i.e. sensitive to pH changes). PEMs were also formed from PAH/ poly(3,4-ethylenedioxythiophene):PSS (PEDOT:PSS), in order to form electrically conducting PEMs on fibres and PEM-like structures were formed from polyethylene oxide (PEO) and polyacrylic acid (PAA). (...).

Download or read book On the Adhesive Properties of Polyelectrolyte Multilayers written by Erik Johansson and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation of polyelectrolyte multilayers (PEMs) by the consecutive treatment of a charged substrate with cationic and anionic polyelectrlytes is an effective method for assigning new or improved surface properties to a substrate. The potential of PEMs for increasing the adhesive interaction between substrates was explored in this thesis in order to determine the molecular mechanisms responsible for the improvement in adhesion. In addition, the objective was to investigate whether there is a relationship between the structural and viscoelastic porperties of the multilayers and their adhesive porperties. PEMs formed from polyallylamine hydrochloride (PAH) and polyacrylic acid (PAA) were studied using atomic force microscopy (AFM) and the surface force apparatus (SFA). AFM colloidal probe pull-off force measurements, conducted under wet conditions, showed that the adhesive interactions werre higher when PAH was absorbed in the outermost layer than when PAA capped the PEM. The results also show that the adhesion increased with time in contact at maximum load. A low molecular weight combination of polyelectrolytes resulted in higher pull-off forces than did a high molecular weight combinaison. These results suggest that the development of a strong adhesive joint is very dependent on the mobility of the polyelectrolytes and interdiffusion across the interface. SFA measurements were conducted under dry conditions, at 100%RH, and under wet conditions. Under dry conditions, the adhesive forces between two mica sheets was decreased after they were covered by PEMs, indicating that the adhesive interaction was dominated by the thermodynamic work od adhesion between the two surfaces. Measurements using a combinaison of stagnation point adsorption reflectometry (SPAR) and quartz crystal microbalance with dissipation( QCM-D) show that PEMs can be successfully constructed from cationic starch and anionic starch at electrolyte conentrations of 1 and 10 mM NaCl. (...).

Download or read book Multilayer Thin Films written by Gero Decher and published by John Wiley & Sons. This book was released on 2012-06-11 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second, comprehensive edition of the pioneering book in this fi eld has been completely revised and extended, now stretching to two volumes. The result is a comprehensive summary of layer-by-layer assembled, truly hybrid nanomaterials and thin fi lms, covering organic, inorganic, colloidal, macromolecular, and biological components, as well as the assembly of nanoscale fi lms derived from them on surfaces. These two volumes are essential for anyone working in the field, as well as scientists and researchers active in materials development, who needs the key knowledge provided herein for linking the field of molecular self-assembly with the bio- and materials sciences.

Download or read book Progress in Adhesion and Adhesives written by K. L. Mittal and published by John Wiley & Sons. This book was released on 2015-07-27 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on the 13 review articles written by subject experts and published in 2014 in the Journal Reviews of Adhesion and Adhesives. The rationale for publication of this book is that currently the RAA has limited circulation, so this book provides broad exposure and dissemination of the concise, critical, illuminating, and thought-provoking review articles. The subjects of the reviews fall into 4 general areas: 1. Polymer surface modification 2. Biomedical, pharmaceutical and dental fields 3. Adhesives and adhesive joints 4. General Adhesion Aspects The topics covered include: Adhesion of condensed bodies at microscale; imparting adhesion property to silicone material; functionally graded adhesively bonded joints; synthetic adhesives for wood panels; adhesion theories in wood adhesive bonding; adhesion and surface issues in biocomposites and bionanocomposites; adhesion phenomena in pharmaceutical products and applications of AFM; cyanoacrylate adhesives in surgical applications; ways to generate monosort functionalized polyolefin surfaces; nano-enhanced adhesives; bonding dissimilar materials in dentistry; flame treatment of polymeric materials—relevance to adhesion; and mucoadhesive polymers for enhancing retention of ocular drug delivery.

Download or read book Advances in Unconventional Lithography written by Gorgi Kostovski and published by BoD – Books on Demand. This book was released on 2011-11-09 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term Lithography encompasses a range of contemporary technologies for micro and nano scale fabrication. Originally driven by the evolution of the semiconductor industry, lithography has grown from its optical origins to demonstrate increasingly fine resolution and to permeate fields as diverse as photonics and biology. Today, greater flexibility and affordability are demanded from lithography more than ever before. Diverse needs across many disciplines have produced a multitude of innovative new lithography techniques. This book, which is the final instalment in a series of three, provides a compelling overview of some of the recent advances in lithography, as recounted by the researchers themselves. Topics discussed include nanoimprinting for plasmonic biosensing, soft lithography for neurobiology and stem cell differentiation, colloidal substrates for two-tier self-assembled nanostructures, tuneable diffractive elements using photochromic polymers, and extreme-UV lithography.

Download or read book Biomaterials Fabrication and Processing Handbook written by Paul K. Chu and published by CRC Press. This book was released on 2008-03-27 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on a variety of production and processing aspects of the latest biomaterials. It discusses how scaffolds are used in tissue engineering and describes common implant materials, such as hard tissue, blood contacting, and soft tissue. The book also examines the important role nanotechnology plays in the preparation of drugs, protein delivery, tissue engineering, cardiovascular biomaterials, hard tissue replacements, biosensors, and bio-MEMS. With contributions from renowned international experts and extensive reference lists in each chapter, this book provides detailed, practical information to produce biomaterials and employ them in biomedicine.

Download or read book Glycopolymers Polyelectrolyte Multilayers for Biomedical Applications written by and published by Scholar Press. This book was released on 2018-01-16 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical background of this work is concerning with the drug loaded polyelectrolyte multilayers (PEM) modified by the host-guest interaction of biocompatible hyperbranched core-shell glycopolymers. The glycopolymer in this work is the hyperbranched polyethyleneimine that was modified with maltose moieties using reductive amination. Thus, the use of glycohyperbranched polymers for drug delivery would allow the avoid naturally occurring drug resistance due to decreased transporter activity. Concerning preparative method, PEM was fabricated using layer-by-layer (LbL) processes involve the sequential deposition of two polyions that physically bond together. Control was taken on the stoichiometric ratio related to cationic and anionic repeating units, which was chosen close to zero for the final applied PEM. Concerning analytical methods, a couple of physical-chemical methods were applied to characterize colloid stability, adhesiveness, drug loading and release of fabricated PEM. In conclusion, a highly sable and sustainable PEM coats on a surface of an activated solid substrate has been fabricated with an efficient ability to recycle the charged molecule for more than 24 times.

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 Biological and Biomedical Coatings Handbook written by Sam Zhang and published by CRC Press. This book was released on 2011-05-24 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in a versatile, contemporary style that will benefit both novice and expert alike, Biological and Biomedical Coatings Handbook, Two-Volume Set covers the state of the art in the development and implementation of advanced thin films and coatings in the biological field. Consisting of two volumes-Processing and Characterization and Applicatio

Download or read book Liposomes Part G written by and published by Academic Press. This book was released on 2009-11-07 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liposomes are cellular structures made up of lipid molecules, which are water insoluble organic molecules and the basis of biological membranes. Important as a cellular model in the study of basic biology, liposomes are also used in clinical applications such as drug delivery and virus studies. Liposomes Part F is a continuation of previous MIE Liposome volumes A through E. * One of the most highly respected publications in the field of biochemistry since 1955 * Frequently consulted and praised by researchers and reviewers alike * Truly an essential publication for anyone in any field of the life sciences

Download or read book Layer by Layer Films for Biomedical Applications written by Catherine Picart and published by John Wiley & Sons. This book was released on 2015-01-30 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: The layer-by-layer (LbL) deposition technique is a versatile approach for preparing nanoscale multimaterial films: the fabrication of multicomposite films by the LbL procedure allows the combination of literally hundreds of different materials with nanometer thickness in a single device to obtain novel or superior performance. In the last 15 years the LbL technique has seen considerable developments and has now reached a point where it is beginning to find applications in bioengineering and biomedical engineering. The book gives a thorough overview of applications of the LbL technique in the context of bioengineering and biomedical engineering where the last years have witnessed tremendous progress. The first part familiarizes the reader with the specifics of cell-film interactions that need to be taken into account for successful application of the LbL method in biological environments. The second part focuses on LbL-derived small drug delivery systems and antibacterial agents, and the third part covers nano- and microcapsules as drug carriers and biosensors. The fourth and last part focuses on larger-scale biomedical applications of the LbL method such as engineered tissues and implant coatings.

Download or read book Multilayer Thin Films written by Gero Decher and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials scientists are often faced with the problem of modifying surfaces of objects, yet keeping their shape and properties. This book provides a detailed survey on the new technology of adsorption from solution for the fabrication of molecularly ordered multicomposite films in order to replace and expand on the well known Langmuir-Blodgett technology and to open the field of molecular self-assembly to materials and biosciences. The book is aimed at scientists who want to integrate several different functional entities in a single device. To this audience it presents the technique of layer-by-layer assembly as today's most powerful key technology, which is low cost, solution based and very robust. It is already beginning to make the transition from academic research into industrial mass production.

Download or read book Properties and Behavior of Polymers 2 Volume Set written by Wiley and published by John Wiley & Sons. This book was released on 2012-12-03 with total page 1605 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides comprehensive, up-to-date information on the physical properties of polymers including, viscoelasticity, flammability, miscibility, optical properties, surface properties and more. Containing carefully selected reprints from the Wiley's renowned Encyclopedia of Polymer Science and Technology, this reference features the same breadth and quality of coverage and clarity of presentation found in the original.

Download or read book Issues in Biological Biochemical and Evolutionary Sciences Research 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 4540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Biological, Biochemical, and Evolutionary Sciences Research: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Biological, Biochemical, and Evolutionary Sciences Research. The editors have built Issues in Biological, Biochemical, and Evolutionary Sciences Research: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Biological, Biochemical, and Evolutionary Sciences Research in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Biological, Biochemical, and Evolutionary Sciences Research: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Download or read book Natural Based Polymers for Biomedical Applications written by Rui L. Reis and published by Elsevier. This book was released on 2008-08-15 with total page 829 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers from natural sources are particularly useful as biomaterials and in regenerative medicine, given their similarity to the extracellular matrix and other polymers in the human body. This important book reviews the wealth of research on both tried and promising new natural-based biomedical polymers, together with their applications as implantable biomaterials, controlled-release carriers or scaffolds for tissue engineering.The first part of the book reviews the sources, processing and properties of natural-based polymers for biomedical applications. Part two describes how the surfaces of polymer-based biomaterials can be modified to improve their functionality. The third part of the book discusses the use of natural-based polymers for biodegradable scaffolds and hydrogels in tissue engineering. Building on this foundation, Part four looks at the particular use of natural-gelling polymers for encapsulation, tissue engineering and regenerative medicine. The penultimate group of chapters reviews the use of natural-based polymers as delivery systems for drugs, hormones, enzymes and growth factors. The final part of the book summarises research on the key issue of biocompatibility.Natural-based polymers for biomedical applications is a standard reference for biomedical engineers, those studying and researching in this important area, and the medical community. - Examines the sources, processing and properties of natural based polymers for biomedical applications - Explains how the surfaces of polymer based biomaterials can be modified to improve their functionality - Discusses the use of natural based polymers for hydrogels in tissue engineering, and in particular natural gelling polymers for encapsulation and regenerative medicine

Download or read book Multilayer Thin Films written by Sukumar Basu and published by BoD – Books on Demand. This book was released on 2020-01-15 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, "Multilayer Thin Films-Versatile Applications for Materials Engineering", includes thirteen chapters related to the preparations, characterizations, and applications in the modern research of materials engineering. The evaluation of nanomaterials in the form of different shapes, sizes, and volumes needed for utilization in different kinds of gadgets and devices. Since the recently developed two-dimensional carbon materials are proving to be immensely important for new configurations in the miniature scale in the modern technology, it is imperative to innovate various atomic and molecular arrangements for the modifications of structural properties. Of late, graphene and graphene-related derivatives have been proven as the most versatile two-dimensional nanomaterials with superb mechanical, electrical, electronic, optical, and magnetic properties. To understand the in-depth technology, an effort has been made to explain the basics of nano dimensional materials. The importance of nano particles in various aspects of nano technology is clearly indicated. There is more than one chapter describing the use of nanomaterials as sensors. In this volume, an effort has been made to clarify the use of such materials from non-conductor to highly conducting species. It is expected that this book will be useful to the postgraduate and research students as this is a multidisciplinary subject.

Download or read book Surface and Interfacial Aspects of Cell Adhesion written by Alain Carré and published by CRC Press. This book was released on 2011-01-19 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cell adhesion comes into play in almost all domains of life. The range of situations in which it occurs, involving organisms, living tissues, microorganisms or single cells, is endless. Cell adhesion is involved in the binding of a cell to a surface, extracellular matrix, or another cell using cell adhesion molecules. It is crucial in the formation and maintenance of coherent multicellular structures. Cell surface adhesion molecules (integrins, for example) which transmit information from the extracellular matrix to the cell play vital roles in numerous cellular processes. Some of these include: cell growth, differentiation, embryogenesis, immune cell transmigration and response, and cancer metastasis. Also cell adhesion is involved in most of pathological situations. This book is divided into four parts as follows: Part 1: Fundamentals of Cell Adhesion; Part 2: Methods to Study Cell Adhesion; Part 3: Surface Treatments to Control Cell Adhesion and Behavior; and Part 4: Cell Adhesion in Medicine and Therapy. A bountiful information is covered in this book which represents the cumulative wisdom of many world-renowned researchers( physicists, materials scientists, chemists and biologists) engaged in unraveling the mechanisms of cell adhesion and how to mitigate or control it. It quite patent from the topics covered in this book that the subject of cell adhesion is truly interdisciplinary. This book should be of great interest and value to anyone interested in cell adhesion which is vitally important to human life.