Teknisk anvendelse af polymerer og kompositter

Nanocarbon polymer biocomposites have gained increased attention from both researchers and manufacturers due to the significant improvement in their physico-mechanical, thermal and barrier properties when compared to conventional materials. Their dimensions, biodegradable character, cost-effectiveness, and sustainability are among the main drivers for increasing demand. However, it is difficult to achieve uniform dispersion between the carbon filler and matrix as it easily forms agglomerations. Production of nanocarbon polymer biocomposites with high mechanical and thermal properties is also limited, but there has been rapid progress in processing possibilities to produce nanocomposites based on various biodegradable fillers. Advanced Nanocarbon Polymer Biocomposites: Sustainability Towards Zero Biowaste collects all these novel scientific findings in one place. It discusses in detail their physical, chemical, and electrical properties and presents the latest research findings on nanocarbon polymer biocomposites with filler loadings and their improvement on compatibility. The book will be of great interest for those researchers who are concerned with the production and use of nanocarbon polymer biocomposites as a new innovative advanced material.

Nanocomposites for Environmental, Energy and Agricultural Applications presents a comprehensive overview of recent developments and prospects for nanocomposites in sustainable/green energy production, water/wastewater treatment as well as crop production. Each chapter introduces the fundamental principles as well as the design and characterization of nanocomposites for various applications. This includes detailed discussions of nanocomposites technology, including mixed matrix membranes for water and gas separation, nanohybrid catalysts for organic pollutants degradation and sustainable energy production as well as advanced nanocomposites of different structural dimensions (0D, 1D, 2D and 3D) for agricultural utilization. The book also discusses the challenges of lab-based research towards industrial implementation and related case studies based on pilot and full-scale processes. At the end of each chapter, future opportunities for improvement will be provided to offer researchers a new research direction. The book will be a practical guide for researchers and scientists working in the fields of nanotechnology and nanomaterials science and technology.

This book highlights recent developments related to fabrication and utilization of nanoparticle-engineered metal matrices and their composites linked to the heavy industries, temperature fasteners, high-pressure vessels, and heavy turbines, etc. The mechanical properties of newly developed metallic composites are discussed in terms of tensile modulus, hardness, ductility, crack propagation, elongation, and chemical inertness. This book presents the design, development, and implementation of state-of-the-art methods linked to nanoparticle-reinforced metal nanocomposites for a wide variety of applications. Therefore, in a nutshell, this book provides a unique platform for researchers and professionals in the area of nanoparticle-reinforced metal nanocomposites.

Fibre hybridisation is a well-established methodology to enhance the failure strains of ¿bre reinforced composites. In a hybrid ¿bre composite, the matrix is reinforced by two or more types of ¿bres, with typically a large sti¿ness contrast. When exactly two types of ¿bres are used for reinforcement, the ¿bres with greater sti¿ness are conventionally called the low extension (LE) ¿bres, while those with greater compliance are called high extension (HE) ¿bres. Hybrid ¿bre composites are typically divided into three cate- gories. If layers of LE and HE ¿bres are stacked over one other, an interlayer or layer-by-layer con¿guration is obtained. If yarns of LE and HE ¿bres are co-woven to form a hybrid ¿bre composite, an intralayer or yarn-by-yarn con¿guration is obtained. Finally, if the LE and HE ¿bres are randomly mixed together, the intrayarn or ¿bre-by-¿bre con¿guration is obtained. From a manufacturing perspec- tive, it is most di¿cult to produce intrayarn composites, and easiest to produce interlayer composites. Hybridisation seeks to combine the advantages of both ¿bre types and alleviate some of the disadvantages. As an example, carbon ¿bre reinforced plastic (CFRP) composites exhibit good strength to weight ratio, but undergo brittle failure leading to low fracture toughness. On the other hand, glass ¿bre reinforced plastic (GFRP) composites exhibit ductile failure, but süer from a relatively higher density than CFRPs, resulting in a lower strength to weight ratio. By combining the carbon ¿bres and glass ¿bres at a microscopic level, intermediate properties can be achieved.

This collection covers innovations in the field of composite materials with a specific focus on eco-friendly and environmentally sustainable systems. All composite fields are explored, including polymer, metal, and ceramic matrix composites with an emphasis on sourcing raw materials in a sustainable way as well as the development of composite materials for environmental sustainability. Topics will include the development of new materials for structural applications, reduction in energy consumption, and increased component life along with discussions of novel methods to reuse existing materials. Additional topics include, but are not limited to:· Naturally Sourced Materials feedstock· Recycled Material feedstock, · Application of composite for reduced carbon footprint · Development of novel materials to repurpose waste from other areas

This book is a useful source of knowledge for engineers and scientists in the field of mechanics of deformation and destruction of composite materials.In Chapter 1 three-dimensional equations of elasticity theory composed for the case of finite displacements and deformations of solids have been analyzed. It is found that the generally accepted simplifications known in the literature and carried out for the case of small deformations result in equations that are considered to be absolutely correct and consistent in all scientific and educational literature on mechanics of deformable solid bodies. However, this conclusion is not sufficiently well-founded as confirmed by formulation and solution of problems on the basis of generally accepted equations for determining both the stress-strain state (SSS) and the critical loads and buckling modes. In Chapter 2 the theoretical and experimental methods for determining the mechanical characteristics of fiber-reinforced plastics (FRPs) based on tensile and compression tests of flat specimens with [0]s , [±90]s, and [±45]2s lay-ups are analyzed. For FRPs with [±45]2s lay-ups, relations are derived for determining the components of lamina strains and stresses in the orthotropy axes of FRP monolayer in terms of axial strains and Poisson ratios of specimens measured in experiments. In Chapter 3 the structure of a unidirectional fibre composite of two types ELUR-P carbon fibre based on KhT-118 cold-curing binder and HSE 180 REM prepreg based on hot-curing binder has been studied. The diameters of fibres and fibre bundles (filaments) of both types of composites have been measured. Based on the results of the analysis of the composite material structure, a refined formulation of the linearised problems of a refined statement of linearized problems on flat internal multiscale buckling modes of a rigid lamina with either fibers or a fiber bundle is presented taking into account their interaction with an epoxy matrix. In Chapter 4 for shells of a layered structure based on the Timoshenkös model, taking into account the transverse compression used for each layer, two versions of two-dimensional equations are constructed that describe geometrically nonlinear deformation with arbitrary displacements and small deformations. The formulation of a linear problem on the initial (subcritical) stress-strain state of a test specimen from a unidirectional fibrous composite with the [900]s structure during tension-compression tests with shear is given. A numerical method for solving the formulated problem is developed, which is based on the reduction of the original problem to a system of integro-algebraic equations and the search for their numerical solution by the finite sum method. In Chapter 5 conclusions were done and directions for further research have been identified.

This book highlights the comprehensive overview of the current status and future potential of biopolymers in the textile industry, including the properties and performance of different types of biopolymers, the applications of biopolymers in various textile products, the challenges and limitations associated with their use, and the environmental impact and economic benefits of biopolymers in the textile industry. The textile industry is one of the largest and most important industries in the world, but it also has a significant environmental impact due to the use of non-renewable and non-biodegradable materials. Biopolymers, which are derived from renewable biological sources such as plants and microorganisms, have the potential to be a sustainable alternative to traditional textile materials. However, the use of biopolymers in the textile industry is still a relatively new and rapidly evolving field, and there is a need for more information and understanding about the opportunities and limitations associated with their use.

The book focuses on the recent technology and advancement in structural integrity and monitoring systems in composite materials. Composites have been widely used in automotive, aerospace and wind turbine industries, therefore it is important to develop state of the art technology to monitor and manage the damage tolerance and durability. This book explores the challenge of a monitoring system in a composite and presents a real-time system which has advantages for damage detection, damage localization, damage assessment and life prediction compared to the Non-Destructive Testing (NDT). It will also present the modelling and prediction of failure in a composite material based on computational analysis of the characteristics and properties of the composite material based on fiber and matrix properties. This book will benefit lecturers, students, researchers, engineers and industrialist who are working in the civil, mechanical engineering, automotive, aerospace and wind turbine industries.

This monograph describes the new quantum theory called the weakest bound electron theory (WBE theory) proposed by Prof. Neng-Wu Zheng and its applications. It starts with the fundamentals of quantum mechanics and then illustrates the key points of WBE theory and the mathematical expressions of WBE theory. Finally, it presents a wide range of applications of WBE theory to the chemical and physical properties of atoms and molecules, including energy levels, transition properties, the difference law of ionization energies etc. It appeals to a broad readership, particularly researchers and academics in chemistry, physics, and materials science.

This book is an introductory text for graduate students, researchers in industries, and those who are just beginning to work on organic electronics materials, devices and their applications. The book includes mainly fundamental principles and theories for understanding organic electronics materials and devices, but also provides information about state-of-the-art technologies, applications and future prospects. These topics encompass physics for organic transistors, structure control technologies of polymer semiconductors, nanomaterials electronics, organic solar cells, organic electroluminescence and dynamics for excitation, among others. In this second edition, the topics that have had particular progress in the field of organic electronics over the past seven years were added. For example, Thermally Activated Delayed Fluorescence (TADF) technology for organic LED, the development of perovskite materials, light-emitting materials using nanomaterials and the development of skin sensors and wearable/embedded devices. The recent scientific understanding of organic electronics is also introduced. This book will help readers to be able to contribute to society with the technologies and science of organic electronics materials in the future.

Applied Plastics Engineering Handbook: Processing, Sustainability, Materials, and Applications, Third Edition presents the fundamentals of plastics engineering, helping bring readers up-to-speed on new plastics, materials, processing and technology. This revised and expanded edition includes the latest developments in plastics, including areas such as biodegradable and biobased plastics, plastic waste, smart polymers, and 3D printing. Sections cover traditional plastics, elastomeric materials, bio-based materials, additives, colorants, fillers and plastics processing, including various key technologies, plastic recycling and waste. The final part of the book examines design and applications, with substantial updates made to reflect advancements in technology, regulations, and commercialization. Throughout the handbook, the focus is on engineering aspects of producing and using plastics. Properties of plastics are explained, along with techniques for testing, measuring, enhancing, and analyzing them. Practical introductions to both core topics and new developments make this work equally valuable for newly qualified plastics engineers seeking the practical rules-of-thumb they don't teach you in school and experienced practitioners evaluating new technologies or getting up-to-speed in a new field.

This book offers a comprehensive and in-depth exploration of the most widely used test methods for characterizing the deformation and failure behavior of materials. It presents a thorough treatise on mechanical testing, providing a valuable resource for researchers, engineers, and students seeking to understand the mechanical properties and performance of materials across various applications. The book is organized into ten chapters dedicated to specific test methods including tensile, compression, bending, torsion, multiaxial, indentation, fracture, fatigue, creep, high strain rates, nondestructive evaluation, ensuring a thorough examination of each technique's principles, procedures, and applications. It features two special chapters focusing specifically on the mechanical characterization of concrete and fiber composite materials. These chapters delve into the unique aspects and challenges associated with testing and analyzing these specific materials.

This book provides the reader with the latest research on vibrational circular dichroism (VCD) spectroscopy including its useful features and applications to many fields. The book starts from an unresolved question in gel chemistry of how component molecules are organized in the flexible fibrils of gels. VCD spectroscopy was successful in giving a clear answer to this mystery. The book also describes a key aspect of this technique lay in the fact that VCD signals were remarkably enhanced when chiral molecules formed a stereoregular molecular array over a few hundred nanometers. VCD spectroscopy was also applied to other topics involving chiral molecules such as the chiral discrimination mechanism in heterogeneous asymmetric catalysis and the build-up of supramolecular chirality in molecular crystals. Furthermore, the book covers the recent instrument developments leading to multi-dimensional VCD measurements with the coordinates of wavenumber, space and time. This progress has opened up new biological and medical applications such as the heterogenous distributions of protein domains in insect wings and the quality control of chiral drugs. The last part of the book presents the possibility of medical diagnosis of Alzheimer¿s disease through multi-dimensional VCD analyses. This book appeals not only to researchers and students who study spectroscopy but also to ones in catalysis, biology and medicine as users of the VCD methods.

This book covers the merits and demerits of advanced composite materials with regard to their applications for earthquake-resistant applications. The chapters in the book are divided into the following main topics: (a) the processing and fabrication of fiber-reinforced polymer composite materials, (b) the mechanical characteristics of materials, (c) the design of strengthening and reinforcing systems for earthquake resistance of the deficient structural system, and (d) design of new earthquake-resistant structures using advanced composite materials. The chapters present experimental tests and numerical modeling of responses of various kinds of structural elements for predicting the load versus deflection response, energy absorption capacity, ductility index, energy ratios, failure modes, and load capacity. It also looks at different kinds of composite systems and their hybrid or functionally graded composites using advanced composite materials, such as carbon fiber-reinforced polymer (CFRP), glass fiber-reinforced polymer (GFRP), aramid fiber-reinforced polymer (AFRP), basalt fiber-reinforced polymer (BFRP), and natural fiber-reinforced polymer (NFRP). The results presented in this book will be of high interest to scientists, researchers, students, and engineers working in the fields of advanced composite materials such as FRPs and other forms of composites for seismic retrofitting and strengthening of deficient structures. This book is helpful for teachers and (undergraduate, Master, and Ph.D.) students to develop a fundamental understanding of the design of earthquake-resistant design of structures (such as buildings, bridges, and industrial structures) using lightweight, durable, and sustainable FRP materials.

Flexible devices based on metal oxides: Achievements and prospects focuses on the integration of flexibility in electronic circuitry, sensing applications, energy conversion and storage, and environmental remediation. Flexibility in these applications offers great potential, especially in the areas of wearable sensors, solar cells, transistors, electronic skin, and human body monitoring. The book investigates flexible and wearable devices based on metal oxide nanostructures or thin films that are capable of bending, rolling, compression, and folding, all while maintaining their performance. Metal oxide nanomaterials display exceptional properties that include mechanical stress tolerance, high optical transparency, high carrier mobilities, wide band gap, high dielectric constant, and superconductivity, amongst others. In some cases, they are also earth abundant, environmentally benign, cost-effective, chemically stable, and compatible with low-cost wet-chemical synthesis routes. The focus of the book is on wearables manufactured using sustainable manufacturing methods and integrated into substrates that are flexible, inexpensive, recyclable, abundant, and lightweight, including polymer, textile, cellulose and cork substrates.

This book highlights recent advances and evolution of various nanomaterials and their potential in diverse research fields. The book covers the synthesis and characterization of various nanomaterials, followed by discussion on desired applications such as clean and green renewable energy, coating, sensors, thermal applications, microelectronics, biomedical applications such as drug carriers, nutrition, biosensors and detection of cancer cells.  The chapters in this book not only illustrate the capability of nanomaterials in such novel usages but also reveal their potential drawbacks and the possible ways to overcome the pitfalls. The book covers interdisciplinary research advancement of nanomaterials, beneficial for researchers and professionals working in both science and engineering.

This book provides a methodical compilation of deriving composites from the hidden treasure of the aquatic world.Continuous and rapid progress in the composite industries have increased the demand for resilient, economically viable, and sustainable composite materials having enhanced mechanical , thermal and electrical properties which better suits there respective applications.If the materials/organisms used for the production or conversion of composites are renewable, degradable and easily and abundantly available then it gives great opportunity to the researchers to work on different options or processes to make them a viable technology. This work describes the organisms and materials present in the aquatic environment for the production of composite materials. Elaborating the versatile green expedients and their potential applications in the field of composites.  Since, growing ecological and environmental consciousness has driven efforts for development of new innovative materials for various end-use applications.Therefore the LCA an circular bio-economy will be discussed to be efficient and sustainable. This book is ideal for the students, academicians, researchers and industry players. It also cover the present scenario, applications and future perspectives of composites derived from aquatic organisms. This compiled book features chapters that discuss the conversion of different materials  and organisms present in aquatic environment to composite materials like micro-algae, seaweeds, chitosan, collagen, agar cyanobacteria etc.in a viable manner.

Advances in Functionalized Polymer Nanocomposites: From Synthesis to Applications presents a detailed review on the synthesis, fundamental chemistry, properties, and applications of these high-performance materials. The book's introductory chapter provides a brief overview of the various types of organic and inorganic nanofillers used for the synthesis of polymer nanocomposites. Emphasis is placed on their fundamental chemistry, processing methods, functionalization, and/or surface modification strategies. The dispersion state and their specific interaction with polymer matrices is also discussed in detail, as well as characterization techniques for functionalized nanofillers and functionalized polymer nanocomposites, and their properties, and applications.The book will be a valuable reference source for scientists, engineers, and postgraduate students working in the field of polymer science and technology, materials science and engineering, composites, and nanocomposites.

This book covers the challenges and opportunities presented by plastics in the modern era and sheds light on the complex interplay of technology, environment, and socio-economic dynamics. With a thorough exploration of the history, uses, and potential of plastics, the book reviews the impact of plastics beyond single-use plastics, and critiques multiple long-term plastic applications that are significant for food security, water resource management, ecological conservation/restoration, and sustainable urbanization. It also explores frameworks for achieving a more sustainable plastic economy aligned with sustainable development goals.This book comprises 13 chapters, commencing with a critical assessment of plastics in the context of sustainable development and global society. It proceeds with a historical overview of plastics' evolution, showcasing pivotal milestones and innovations in modern industry and daily life. Subsequent chapters delve into diverse topics: the intricate relationships between plastics, food security, and sustainable urbanization; plastics' impact on water safety, management, distribution, and conservation; their potential as an alternative energy source; and their innovative applications in sustainable transportation and energy generation. Emphasis is placed on plastics' role in waste reduction and recycling, as well as the latest sustainable alternatives like biodegradable and recyclable materials. In the book's final sections, readers will learn about green buildings and climate-resilient cities constructed using innovative plastic materials, and plastics' significance in space exploration. The book concludes with a forward-looking perspective on plastics' future, accompanied by recommendations for a more sustainable coexistence between society and these versatile materials.This book is a valuable resource for researchers, policymakers, industry professionals, and concerned citizens seeking to navigate the intricate landscape of plastics, their environmental implications, and their potential for sustainable development.

This book highlights the pulchritudinous features of FRP composites emphasizing failure criteria referring to microstructural as well as micromechanical aspects. The potential and promises of this class of material as being explored for supercritical applications necessitate the analysis and assessment of FRPs with a spectrum of low to high strain rates. Additionally, constitutive modeling and shock properties of polymeric composites along with the data processing techniques and relevant theories for different characterization methods are conversed. The findings of previous studies available on mechanical characteristics of polymer composites under quasi-static and high-strain-rate circumstances are also discussed. The dearth of open literature and limited information culminate the need for this book which may eventually bridge the existing gap.

This book provides the latest developments in functional and engineering materials for defence applications. It contains a total of 20 book chapters in 2 proposed volumes: Vol. 1. Defence Functional Materials and Vol. 2. Defence Engineering Materials. All the book chapters are authored by leading scientists from the premier institutes, such as DRDO laboratory, DMSRDE, Kanpur, India, and edited by Drs. N Eswara Prasad, RJH Wanhill, and DK Setua. Both the authors and the editors are well known internationally for their seminal works in the Functional and Engineering Materials R&D and S&T. The principal purpose of this two-volume book is to provide the salient features of materials selection, synthesis, development and qualification for many a classical applications encompassing aero, naval and ground-based defence systems. They would surely act as valuable vade mecums for both active researchers, defence experts, post-graduate students, and faculty members who like to work and contributeto defence forces through research in areas such as defence materials, products, prototypes, sub-systems and systems that need cutting edge technologies and the latest and best materials and materials solutions.

This book presents the latest developments in the field of vegetable oil -based composites. It focuses on different vegetable oils such as castor, linseed, corn, soybean, olive, palm, and canola oils;, and fillers from inorganic materials and agricultural residues used in the preparation of vegetable oil -based composites. There are several advantages to vegetable oil-based polymer composites, due to their universal availability, inherent biodegradability, low price, and superb environmental credentials (i.e., low eco-toxicity and low toxicity towards humans). This book will be of is of interest to researchers working in the field of bio-based composite materials for the development of green and sustainable materials.