Teknisk anvendelse af polymerer og kompositter

Shape Memory Composites Based on Polymers and Metals for 4D Printing is a thorough discussion of the physics and chemistry behind this developing area of materials science. It provides readers with a clear exposition of shape-memory-composite (SMC) preparation techniques for 3D and 4D printing processes and explains how intelligent manufacturing technology may be applied in fields such as robotics, construction, medical science, and smart sensors.The book covers fundamental background knowledge on the synthesis of shape memory polymers (SMPs) and shape memory alloys (SMAs), and additive manufacturing techniques. Polymers and metals and their roles in 4D printing are dealt with separately, and applications of 4D printing are treated in their own chapter. The different alloy compositions and nanoparticle fillers in polymer composites are examined in detail, along with the key mechanisms involved in their processing. Hybrid nanofillers and synergistic composite mixtures, which are either in extensive current use or have shown promising outcomes in the field of 4D printing, are thoroughly discussed. Differences between these novel SMCs and traditional metal alloys, organic and inorganic composites are presented, and means by which they can improve mechanical properties that are triggered by external sources like magnetic field, temperature, and pH of solvent, are set out. This book provides practitioners, industrial researchers, and scholars with a state-of-the-art overview of SMP/SMA synthesis, additive manufacturing, modification in synthesis of SMCs for 4D printing, and their likely future applications.

This applications-oriented book describes the construction of an injection mold from the ground up. Included are explanations of the individual types of molds, components, and technical terms; design procedures; techniques, tips, and tricks in the construction of an injection mold; and pros and cons of various solutions.Based on a plastic part ("bowl with lid") specially developed for this book, easily understandable text and many illustrative pictures and drawings provide the necessary knowledge for practical implementation. Step by step, the plastic part is modified and enhanced. The technologies and designs that are additionally needed for an injection mold are described by engineering drawings. Maintenance and repair, and essential manufacturing techniques are also discussed.With full-color illustrations, this third edition builds on the success of the previous ones, with significantly expanded coverage of molding simulation, including many new figures, and updates and small corrections throughout the book.

This book contains full papers presented at the First Virtual Conference on Mechanical Fatigue (VCMF 2020), which was organised by the University of Porto (FEUP, Portugal), the Wroclaw University of Science and Technology (Poland), University of Electronic Science and Technology of China (China), Siberian Federal University (Russia), and the ESIS/TC12 Technical Committee (European Structural Integrity Society-ESIS), between 9 and 11 of September 2020. This conference was intended to be a forum of discussion of new research concepts, equipment, technology, materials and structures and other scientific advances within the field of mechanical fatigue and fracture. The first edition of the VCMF 2020 event has reached more than 60 participants from more than 20 nationalities demonstrating the vitality of this new event.

This book offers an up-to-date, platform-independent introduction to injection molding simulation, which plays a very important role in the design of molds and molded parts as well as process development and optimization. The content is structured and conveyed within an engineering framework. Complicated mathematical derivations are avoided as far as possible.The necessary environment of the injection molding simulation is illuminated alongside, so that the build-up of a suitable simulation model and the interpretation of the results are made possible, and knowledge of the model-specific limits is imparted. Guidance is also provided regarding the interpretation of results so that they can be better evaluated quantitatively.The book is designed as a textbook and thus is suitable to accompany courses covering injection molding simulation. The content is largely independent of any particular software package; however, introductory practice examples for Autodesk Moldflow Insight, CADMOULD and Moldex3D are included as step-by-step instructions.

This volume deals with the various fabrication techniques, surface functionalization and biomedical applications of polymeric fibers possessing different scale and structure. It provides an overview of fabrication techniques such as Co-axial, Centrifugal, Melt and Yarning to procure multiscale, tubular and layered fibrous scaffold employed for biomedical applications. The chapters in this volume discusse the surface/chemical functionalization of fibers which enhance the biological properties of the fibrous scaffolds as well as the development of hybrid, layered and external stimuli-responsive fibrous scaffolds that hold potential application in biosensor and other biomedical fields. In addition, recent advances and applications of polymeric multiscale fibers in tissue engineering, regenerative medicine and drug delivery are presented. The potential use of fibrous scaffolds in bone, neural, tendon/ligament and cardiac tissue engineering, nanofibers as an antimicrobial wound dressing, employed in cancer theragnostics and in the treatment of skin/periodontal infections are discussed. The volume provides expert knowledge on the fabrication techniques, development of different scale and hybrid structure fibers, surface functionalization, layered and external stimuli responsive fibrous scaffolds. It will be beneficial to material/biomaterials scientists, bioengineering and biotechnologists by providing a better understanding on the subject of the innovative applications of fibrous scaffolds in drug delivery, tissue engineering, wound dressings and regenerative medicine.

This book highlights the sustainability aspects of products and processes in forest science. The forest products sector supplies raw materials to several industrial sectors worldwide. These products can be classified as timber or non-timber products. Wood products are those that originate from the woody fraction and can include pulp, charcoal, firewood, and others. The non-timber products, on the other hand, have the products extracted from the different parts of the tree, such as bark, leaves, fruits, resins, oils, tannins, or even products extracted from non-woody biomass, such as palm heart or carnauba, among others. There are new studies and new products developed from forests worldwide each day. However, studies that evaluate the sustainability of these products and the processes related to their production are not so common. It is essential to highlight the sustainability aspects of these activities and the products obtained from them; such that steps can be taken to make the processes eco-friendly.Allied to ecological sustainability studies that evaluate the technical and economic feasibility of such activities arise. With this book, the authors through the approach of other products and processes of forest science, present the practical vision of aligning production with sustainability in an economically viable way. The book analyses different products and processes, ranging from technological production of engineered wood products to handcrafted resins with a high commercial appeal. With the expertise of different authors, who are researchers in various specific areas of forest sciences, this book helps expand research and presents new insights, assisting industry decision-makers and researchers working in the areas forest sciences.

Metal-Chalcogenide Nanocomposites: Fundamentals, Properties, and Industrial Applications focuses on metal chalcogenide nanomaterials for environmental remediation and corrosion applications. The book's chapters focus on cost-effective and facile fabrication approaches, their growth mechanisms, optical, electrical, and other important properties, and their applications in a broad range of diverse fields such as photocatalysis, photovoltaics, hydrogen production, lithium batteries, energy storage, anticorrosion, and sensor devices. The book will be an important information source for both material scientists and engineers who want to create the next generation of products and devices for energy and environmental applications.

This book gathers the latest advances and innovations in the field of dynamic loads and testing of composite materials and sandwich structures, as presented by international researchers and engineers at the International Symposium on Dynamic Response and Failure of Composite Materials (DRAF), held in Ischia, Italy, on June 21¿24, 2022. Contributions include a wide range of topics such as low and high velocity impacts, smart composites, hull slamming, shock and blast, hail and bird impact, damage resistance and tolerance, failure mechanisms, composite structures, delamination and fractures, progressive damage modeling, micromechanics, ballistic impacts, ceramic and CMC, auxetic materials and structures, additive manufacturing, crashworthiness, green composites, and structural health monitoring.

This book describes the advantages and disadvantages and characterization techniques of clay-composites for environmental applications. It examines the structure and chemistry of different types of clay-composites and their synthesis, characteristics and applications in detail with a special focus on upscaling and limitations. Various topics covered in this book include overview of clay composites and their environmental applications, clay-biochar composites, clay-surfactants composites, organo-clay composites, clay hybrids and enriched clay composites. This book will be useful for beginners, researchers, material scientists and engineers who are interested in applied research of clay-based composites.

This book gives an overview of the processing, properties, and applications of fibers and cellulose derivatives obtained from annual plant materials in the formation of non-wood source of pulp. The book comprises illustrations and tables summarizing the latest research on the production of fibers and cellulose derivatives using several key methods and/or characterization techniques. This book collates the information and knowledge of new ways to prepare cellulosic derivatives and describe the concepts and architecture of fibers obtained from annual plants. This book caters to researchers, policymakers, and industrial practitioners who are interested in natural fibers as a way to preserve the forest resource and to satisfy the increasing demand in pulps.

This comprehensive and authoritative book aims to encompass the best and current practices in the field of contemporary food packaging. It covers various aspects of packaging, including challenges and their solutions, innovations, and environmental concerns. Written by experts working in the field, the content is supported by technical/statistical data, practical examples, case studies, and real-life experiences of academicians and professionals working in the area of food packaging. The book covers challenges in food packaging, systems and materials for packaging, packaging design requirements of the food industry, technology machinery and system, printing and graphics, testing and regulatory aspects, advanced and smart packaging, distribution and logistics in a globalized environment, and sustainable and green packaging. This book will be useful for Packaging Technologists, food scientists, material scientists, policy makers, students, and researchers.  

The Handbook of Natural Polymers Volume Three : Versatile Applications explores advanced and emerging applications of polymers from natural sources. The book introduces the state-of-the-art, along with opportunities in natural polymers with advanced applications before presenting coverage of natural polymers applied to specific cutting-edge applications. Areas covered include biosensing, drug carriers, cosmetics, tissue engineering, textiles, adhesives and coatings, food, super adsorbents, automotive and construction, 3D printing, paper, nanoelectronics, energy storage, military, smart devices, water purification, dentistry, agriculture, and packaging. In each case, a methodical approach enables readers to understand natural polymer sources, preparation, properties, appropriate applications, emerging materials and new avenues. The final two chapters consider end-of-life themes, including environmental remediation of natural polymers and their transformation to biofuels. As part of a Three-volume handbook offering comprehensive coverage of natural polymers, this book will be of interest to all those looking to gain a broad knowledge of natural polymers, including academic researchers, scientists, advanced students, engineers and R&D professionals from a range of disciplines and industries.

This book provides a foundational understanding of polymer dielectrics based on percolative composites. It covers the microstructure and physical properties, such as dielectric, electrical, magnetic, and rheological properties, of polymer composites, as well as how these properties can be explained using various theoretical models and spectroscopy techniques, such as dielectric spectroscopy, impedance spectroscopy, and conductivity spectroscopy. The book also discusses non-percolative polymer composites and the suitability of polymer dielectrics for electrical energy storage in various devices. It is intended for graduate students and professionals in fields such as condensed matter physics, applied physics, statistical physics, materials science, polymer science and technology, chemistry, and engineering. It will be particularly useful for physicists, materials scientists, polymer scientists, chemists, engineers, and others interested in the physics and applications of percolativecomposites based on polymer matrix.

This book treats the mechanical behavior of one-dimensional sandwich structures, a typicaloncept in the context of lightweight design. Such structures are composed of different constituent (e.g., layers) in order to achieve overall properties, which are better than for a single component alone. This book covers the basic mechanical load cases, i.e., tension/compression, bending, and shear. Based on this knowledge, different failure modes, i.e., plastic yielding, and global and local instabilities are investigated. In addition, an introduction to classic optimization problems, i.e., the formulation of an objective function (e.g., the weight of a structure) and corresponding restrictions, is included. The consideration here is limited to one- or two-dimensional design spaces, i.e., with a maximum of two design variables. For such simple cases, the minimum of the objective function can often be determined using analytical or graphical methods.

This book satisfies the interest and curiosity of beginners in thin film electrode preparations, characterizations, and device making, while providing insight into the area for experts. The considerable literature on ¿metal chalcogenides based carbon composites and their versatile applications¿ reflect its importance for research and demonstrate how it¿s now reached a level where the timely review is necessary to understand the current progress and recent trends and future opportunities. In the book, the authors examine recent advances in the state-of-the-art fabrication techniques of metal sulfide based carbon composites along with their working mechanisms, associated issues/solutions, and possible future are discussed. In addition, detailed insight into the properties and various applications including principles, design, fabrication, and engineering aspects are further discussed.

This book covers next-generation nanocomposite supercapacitor materials. It deals with a wide range of emerging and sustainable supercapacitors based on, e.g., low-dimensional materials including transition metal oxides, carbons, Mxenes, etc., and metal-organic frameworks. Additionally, it features up-to-date coverage of advanced supercapacitors such as 3D printing, atomic layer deposition, recycling, quantum, on-chip, shape memory, self-healing, and micro-scale supercapacitors.This book is part of the Handbook of Nanocomposite Supercapacitor Materials. Supercapacitors have emerged as promising devices for electrochemical energy storage, playing an important role in energy harvesting for meeting the current demands of increasing global energy consumption. The handbook covers the materials science and engineering of nanocomposite supercapacitors, ranging from their general characteristics and performance to materials selection, design and construction.Covering both fundamentals and recent developments, this handbook serves a readership encompassing students, professionals and researchers throughout academia and industry, particularly in the fields of materials chemistry, electrochemistry, and energy storage and conversion. It is ideal as a reference work and primary resource for any introductory senior-level undergraduate or beginning graduate course covering supercapacitors.

This book presents an analytical framework for calculating the fracture toughness of generally layered beam structures with an elastically coupled response and hygrothermal stresses. The beam under study features several peculiarities: it consists of multiple layers of dissimilar materials, features bending-extension coupling, and contains residual hygrothermal stresses. Here, a generic analytical model is proposed to compute the energy release rate and the mode mixity. Mechanics of composite materials, crack closure integral, and energetic methods are among the theoretical tools employed for developing the model.A wealth of new closed-form expressions is presented, together with their validation through finite element analyses, which enables investigating various material systems and testing configurations. Experimentalists will find directions for the design and interpretation of delamination tests on laminated composites with uncommon stacking sequences. At the same time, theoreticians can exploit the analytical solution as a benchmark test for more refined analytical and numerical models. Furthermore, the book gives novel insights into the fracture behavior of a titanium-to-CFRP adhesive joint, which is intended for application in the hybrid laminar flow control of a future aircraft. It reports on experiments and theoretical analyses that help understand the behavior of this novel joint. All in all, this book offers extensive updates on methods for fracture analysis of materials with an elastically coupled behavior and residual stresses. It addresses students, researchers, and engineers alike.

This award-winning textbook delivers an earnest and comprehensive treatment of the rapidly evolving field of Materials Chemistry. It addresses inorganic-, organic-, and nano-based materials from a structure vs. property treatment, providing a suitable breadth and depth coverage of the field¿in a concise and accessible format.The updated 4th edition features significant updates to glasses and ceramics, solid-state impurities, nanomaterial toxicity, as well as materials used in energy storage, photovoltaic, and electronics applications. Advanced fabrication techniques such as additive manufacturing (3-D printing) and dynamic light scattering (DLS) characterization of suspended nanoparticles are now also included. This new edition also expands the coverage of sustainability and life cycle analysis, of increasing importance for a world plagued with the effects of climate change.Recognized by a 2008 Textbook Excellence Award from the Text and Academic Authors Association (TAA), Fahlman¿s Materials Chemistry is ideal for upper-level undergraduate students, as well as first-year graduate students in chemistry, physics, or engineering fields, and may also serve as a valuable reference to industrial researchers. Each chapter concludes with a section that describes important materials applications and an updated list of thought-provoking questions.

This book brings together multiple aspects of the recent research conducted in the field of nanotechnology covering topics such as the synthesis of various nanoparticles, nanorods, graphene, graphene oxide-metal composites, characterization of these materials, and ample aspects of various applications including in heavy metal sensing, optoelectronic devices, gas sensing, solar cells, biomedical sensors, role in the drug delivery, and waste-water treatment. The book is of interest to early career researchers, who are trying to grasp multiple aspects of nanomaterials and nanocomposite synthesis and its potential applications.

This book focuses on the matrix cracking behavior in ceramic-matrix composites (CMCs), including first matrix cracking behavior, matrix cracking evolution behavior, matrix crack opening and closure behavior considering temperature and oxidation. The micro-damage mechanisms are analyzed, and the micromechanical damage models are developed to characterize the cracking behavior. Experimental matrix cracking behavior of different CMCs at room and elevated temperatures is predicted. The book can help the material scientists and engineering designers to better understand the cracking behavior in CMCs.

This collection brings together engineers, scientists, scholars, and entrepreneurs to present their novel and innovative contributions in the domain specific to metal-matrix composites and on aspects specific to processing, characterization, mechanical behavior, measurements, failure behavior, and kinetics governing microstructural influences on failure by fracture. Topics include but are not limited to: Metals and metal-matrix composites Nano-metal based composites Intermetallic-based compositesContributions in the above topics connect to applications in industry-relevant areas: automotive; nuclear and clean energy; aerospace; failure analysis; biomedical and healthcare; and heavy equipment, machinery, and goods.

This book comprehensively and systematically discusses in situ aluminum matrix composites, from their system design, material development, and preparation technology, to their solidification structure, plastic processing, and properties. As a new type of metal matrix composite, it not only provides a technical framework for the low-cost, large-scale development of high-performance compliant materials, but also provides important technical support for the promotion of the aluminum industry. The book appeals to researchers and industrial practitioners in the area of materials development for in situ aluminum matrix composites.

This book provides an overview on the latest technology and applications of bio-based fiber composite materials. It covers the mechanical and thermal properties of bio-fibers for polymeric resins and explains the different pre-treatment methods used by the researchers for the enhancement. In addition, this book also presents a complete analysis on the tribological behavior of bio-fiber reinforced polymer composites to appreciate the friction and wear behavior. This book would be a handy to the industrial practitioners and researchers in the direction of achieving optimum design for the components made of natural fiber based polymer matrix composites.