Download or read book Characterization of Multifunctional Carbon Nanotube Yarns written by Christian David Page and published by . This book was released on 2013 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manufacturing and Characterization of Carbon Nanotube Yarn Composites written by Cecil E. Evers and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research demonstrates the techniques to potentially use continuous carbon nanotube (CNT) yarns to make high mechanical performance composites at scale for use in aerospace applications. CNT yarns are a way to convert carbon nanotubes into engineering scale materials. Fully CNT reinforced composites were manufactured using a filament winding process and aerospace grade resin systems. Manufacturing techniques were evaluated, including stretching, compression, resin impregnation, and flow control. Continuous CNT yarns were made into sizable unidirectional, 0°/90°, and quasi-isotropic composite laminates. The resultant composite panels achieved mechanical properties that exceed the current state of the art carbon fiber composites such as IM7/8552 CFRP.
Download or read book Mechanical Characterization and Morphology Study of a Novel Class of Carbon Nanotube Textiles and Composites written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotube yarns are an emerging class of carbon nanotube materials that show great promise in composite applications. This research study was conducted to gain insight into the morphological structure of the yarns and to correlate their structure to the mechanical properties of both dry yarns and composites. Complex 3-D braided nanotube yarn structures were provided to determine the mechanical properties of macroscopic samples and to determine the effect of processing on the yarns. To accomplish these goals, baseline samples of carbon fiber were tested, a microscopical study was conducted, the cross sectional area of the samples were properly determined, composites were fabricated, and samples of the dry nanotube yarn structures as well as their composites were tested in tension. The results of this study showed that in composite structures with low viscosity resin, the nanotube yarns did not act as the constituent reinforcement. Due to resin penetration through the yarns structures, the individual nanotubes that make up the yarns acted as the constituent reinforcement. In addition, the testing of the 3-D braided yarn structures showed that this process did not significantly weaken the structure and could be useful in making macroscopic preforms of carbon nanotube yarns.
Download or read book Carbon Nanotubes written by Ado Jorio and published by Springer Science & Business Media. This book was released on 2007-12-18 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building on the success of its predecessor, Carbon Nanotubes: Synthesis, Structure, Properties and Applications, this second volume focuses on those areas that have grown rapidly in the past few years. Contributing authors reflect the multidisciplinary nature of the book and are all leaders in their particular areas of research. Among the many topics they cover are graphene and other carbon-like and tube-like materials, which are likely to affect and influence developments in nanotubes within the next five years. Extensive use of illustrations enables you to better understand and visualize key concepts and processes.
Download or read book Fabrication and Analysis of Multifunctional Carbon Nanotube Electrical Conductors written by Andrew Robert Bucossi and published by . This book was released on 2018 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Carbon nanotube (CNT) bulk conductors have been proposed as an alternative material to metals for power and data transmission applications due to their light weight, flexure tolerance, and chemical stability. However, current fabrication technologies prevent bulk CNT wires from matching the electrical properties of individual CNTs, providing opportunity for researchers to improve CNT wire fabrication. In this work, CNT conductors have been advanced using high-purity laser-vaporized single wall carbon nanotubes (SWCNTs). Acid dispersion and extrusion of SWCNTs into a coagulant bath was used to fabricate wires and systematic modification of the process has determined that coagulation dynamics govern the resulting wire properties. Extrusion of highly aligned and dense, acid-doped SWCNT wires yielded wires with record-setting electrical conductivities of 5.1 MS/m. An extrusion apparatus has been designed and built to scale up the fabrication process and has reduced variability in wire conductivity from 30% to 6% for samples 10’s of meters long. The high-current behavior of extruded SWCNT wires and commercially available CNT yarns has been investigated in a variety of ambient conditions. Comparison of electrical testing scenarios has determined that voltage-controlled testing is the proper method of characterizing CNT wires at high currents. Maximum current densities of 420 MA/m2 for extruded SWCNT wires were reached in helium, 10x greater than that reached in helium by commercial CNT yarns and exceeding fuse-law behavior for aluminum wires of equivalent diameter. Further work to enhance CNT electrical conductivity was conducted using IBr chemical doping. Electrical enhancement of commercial CNT sheets and dopant adsorption were correlated and determined to be solvent dependent. A mechanism is proposed where low-dipole moment solvent systems favor the IBr-CNT interaction over the IBr-solvent and the solvent-CNT interactions. The optimal IBr doping conditions from the work were applied to commercial CNT yarns leading to an improvement in conductivity of 13.4x to a value of 1.4 MS/m. High voltage testing in air shows a 36% increase in maximum current, compared to as-received commercial CNT yarns. This dissertation research demonstrates the importance of SWCNT purity and selection of coagulation conditions to promote high-density, aligned SWCNT wires. Delivery of chemical dopants with high electrochemical potential through solvents which favor dopant-CNT interactions enhances electrical conductivity and maximum current density, achieving CNT wires capable of competing with metal conductors for electrical transmission applications."--Abstract.
Download or read book Carbon Nanotubes written by Mohamed Berber and published by BoD – Books on Demand. This book was released on 2016-07-20 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows the recent advances of the applications of carbon nanotubes (CNTs), in particular, the polymer functionalized carbon nanotubes. It also includes a comprehensive description of carbon nanotubes' preparation, properties, and characterization. Therefore, we have attempted to provide detailed information about the polymer-carbon nanotube composites. With regard to the unique structure and properties of carbon nanotubes, a series of important findings have been reported. The unique properties of carbon nanotubes, including thermal, mechanical, and electrical properties, after polymer functionalization have been documented in detail. This book comprises 18 chapters. The chapters include different applications of polymer functionalization CNTs, e.g. photovoltaic, biomedical, drug delivery, gene delivery, stem cell therapy, thermal therapy, biological detection and imaging, electroanalytical, energy, supercapacitor, and gas sensor applications.
Download or read book Multifunctional Carbon Nanotube Yarns for Artificial Muscles and Energy Harvesters written by Zhong Wang and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The superb mechanical, physical, and chemical properties of carbon nanotube (CNT) yarns have promoted their application as function components that program actuation, sensing, and power management for soft robotics and smart systems. Success in making artificial muscles that are faster, more powerful, and that can provide larger strokes would expand their applications. Efficient conversion of ambient mechanical energy into electrical energy is needed for diverse applications, including self-powered wireless sensors, structural and human health monitoring systems, and the extraction of energy from ocean waves. Herein, the development of CNT yarn artificial muscles and mechanical energy harvesters are first discussed, and the obtained understanding of underlying mechanisms provide guidance for optimizing muscle and harvester performances. Next, unipolar stroke CNT yarn muscles are described, in which muscle stroke changes between extreme potentials are additive and muscle stroke remarkably increases with increasing potential scan rate. The normal decrease in stroke with increasing scan rate, because of decreased capacitance, is overwhelmed by a dramatic increase in effective ion size caused by electroosmotic pumping of solvent. These coiled carbon nanotube yarn muscles contain a yarn guest that shifts the yarn’s potential of zero charge (pzc) by over a volt, either positively or negatively. Such pzc shift agents include ion-exchange membrane polymers, oxidized graphene platelets, and surfactants. Record muscle strokes, contractile work-per-cycle, contractile power densities, and energy conversion efficiencies are obtained for unipolar muscles. Then, powerful CNT yarn mechanical energy harvesters (we call twistrons) are described, which are electrochemical artificial muscles run in reverse. Stretching a coiled CNT yarn can provide large, reversible changes in electrochemical capacitance, which enables conversion of mechanical energy to electrical energy. The performance of these twistron harvesters can be increased by diverse fabrication methods: optimizing the structure of the precursor CNT forest, using stretchinduced alignment, thermal annealing under tension, and incorporating reduced graphene oxide nanoplates. The peak output power at 1 Hz and at 30 Hz for a sinusoidal stretch were 0.73 and 3.19 kW/kg, which are 15- and 13-fold higher than for previous twistron harvesters at these respective frequencies. This performance at 30 Hz was over 12-fold that of other prior-art mechanical energy harvesters for frequencies between 1 Hz and 600 Hz. Last, the opportunities and challenges for future practical applications of CNT yarns are highlighted.
Download or read book Carbon Nanotube Science written by Peter J. F. Harris and published by Cambridge University Press. This book was released on 2009-03-19 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes represent one of the most exciting research areas in modern science. These molecular-scale carbon tubes are the stiffest and strongest fibres known, with remarkable electronic properties, and potential applications in a wide range of fields. Carbon Nanotube Science is a concise, accessible book, presenting the basic knowledge that graduates and researchers need to know. Based on the successful Carbon Nanotubes and Related Structures, this book focuses solely on carbon nanotubes, covering the major advances made in recent years in this rapidly developing field. Chapters focus on electronic properties, chemical and bimolecular functionalisation, nanotube composites and nanotube-based probes and sensors. The book begins with a comprehensive discussion of synthesis, purification and processing methods. With its comprehensive coverage of this active research field, this book will appeal to researchers in a broad range of disciplines, including nanotechnology, engineering, materials science and physics.
Download or read book Handbook of Materials Failure Analysis written by Abdel Salam Hamdy Makhlouf and published by Butterworth-Heinemann. This book was released on 2019-10-22 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Materials Failure Analysis: With Case Studies from the Electronics Industries examines the reasons materials fail in certain situations, including material defects and mechanical failure as a result of various causes. The book begins with a general overview of materials failure analysis and its importance. It then proceeds to discussions on the types of failure analysis, specific tools and techniques, and an analysis of materials failure from various causes. As failure can occur for several reasons, including materials defects-related failure, materials design-related failure, or corrosion-related failures, the topics covered in this comprehensive source are an important tool for practitioners. - Provides the most up-to-date and balanced coverage of failure analysis, combining foundational knowledge and current research on the latest developments and innovations in the field - Offers an ideal accompaniment for those interested in materials forensic investigation, failure of materials, static failure analysis, dynamic failure analysis, and fatigue life prediction - Presents compelling new case studies from key industries to demonstrate concepts
Download or read book NanoCarbon 2011 written by César Avellaneda and published by Springer Science & Business Media. This book was released on 2012-09-28 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents highlighted results coming up from NanoCarbon2011, a Brazilian Carbon event. The topics cover the latest advances in Brazilian basic and applied research related to different carbon materials. The chapters address reviews on their fundamental and outstanding properties and describe various classes of new promising high-tech applications for carbon materials.
Download or read book Porous lightweight composites reinforced with fibrous structures written by Yiqi Yang and published by Springer. This book was released on 2017-07-30 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will be a one-stop-shop for readers seeking information on lightweight composites made from multiple materials via diverse processing technologies. The lightweight composites are featured for their potential to be basic construction units in a variety of areas, especially automotive, civil engineering, aerospace engineering, etc. Emphasis will be on how fibers or fibrous structures reinforce the composites. The subject of the book is to provide a comprehensive understanding on the raw materials, processing technologies, performance properties, and end uses of lightweight composites.
Download or read book Carbon Nanotube Fibres and Yarns written by Menghe Miao and published by Woodhead Publishing. This book was released on 2019-09-14 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanotube Fibres and Yarns for Smart Textiles: Production, Properties and Applications in Smart Textiles explains the relevance of carbon nanotube science and provides new insights on this emerging, high-performance textile material. Particular emphasis is placed on applications in smart textiles and wearable electronics applications, such as flexible sensors, actuators and energy sources. This collection examines the state-of-the-art in carbon nanotube (CNT) research, providing guidance for anyone who is exploring problems where CNTs may provide design solutions. Finally, the book addresses advances in yarn spinning methods, yarn structures and properties. Drawing on his experience in the textile industry, the book's editor presents academic research in a way that is comprehensible and useful to materials scientists and engineers in practice. Explains how carbon nanotube science can meet the challenging requirements of important and emerging smart textiles and wearable electronics applications Reviews and analyzes key developments on CNT yarn spinning methods, yarn structures and properties, and proposed applications Addresses the potential applications of CNT yarns and nanocomposite fibers
Download or read book Nanotube Superfiber Materials written by Mark Schulz and published by William Andrew. This book was released on 2013-09-16 with total page 861 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotube Superfiber Materials refers to different forms of macroscale materials with unique properties constructed from carbon nanotubes. These materials include nanotube arrays, ribbons, scrolls, yarn, braid, and sheets. Nanotube materials are in the early stage of development and this is the first dedicated book on the subject. Transitioning from molecules to materials is a breakthrough that will positively impact almost all industries and areas of society. Key properties of superfiber materials are high flexibility and fatigue resistance, high energy absorption, high strength, good electrical conductivity, high maximum current density, reduced skin and proximity effects, high thermal conductivity, lightweight, good field emission, piezoresistive, magnetoresistive, thermoelectric, and other properties. These properties will open up the door to dozens of applications including replacing copper wire for power conduction, EMI shielding, coax cable, carbon biofiber, bullet-proof vests, impact resistant glass, wearable antennas, biomedical microdevices, biosensors, self-sensing composites, supercapacitors, superinductors, hybrid superconductor, reinforced elastomers, nerve scaffolding, energy storage, and many others. The scope of the book covers three main areas: Part I: Processing; Part II: Properties; and Part III: Applications. Processing involves nanotube synthesis and macro scale material formation methods. Properties covers the mechanical, electrical, chemical and other properties of nanotubes and macroscale materials. Different approaches to growing high quality long nanotubes and spinning the nanotubes into yarn are explained in detail. The best ideas are collected from all around the world including commercial approaches. Applications of nanotube superfiber cover a huge field and provides a broad survey of uses. The book gives a broad overview starting from bioelectronics to carbon industrial machines. - First book to explore the production and applications of macro-scale materials made from nano-scale particles - Sets out the processes for producing macro-scale materials from carbon nanotubes, and describes the unique properties of these materials - Potential applications for CNT fiber/yarn include replacing copper wire for power conduction, EMI shielding, coax cable, carbon biofiber, bullet-proof vests, impact resistant glass, wearable antennas, biomedical microdevices, biosensors, self-sensing composites, supercapacitors, superinductors, hybrid superconductor, reinforced elastomers, nerve scaffolding, energy storage, and many others
Download or read book Aligned Carbon Nanotubes written by Zhifeng Ren and published by Springer Science & Business Media. This book was released on 2012-09-05 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a survey of the physics and fabrication of carbon nanotubes and their applications in optics, electronics, chemistry and biotechnology. It focuses on the structural characterization of various carbon nanotubes, fabrication of vertically or parallel aligned carbon nanotubes on substrates or in composites, physical properties for their alignment, and applications of aligned carbon nanotubes in field emission, optical antennas, light transmission, solar cells, chemical devices, bio-devices, and many others. Major fabrication methods are illustrated in detail, particularly the most widely used PECVD growth technique on which various device integration schemes are based, followed by applications such as electrical interconnects, nanodiodes, optical antennas, and nanocoax solar cells, whereas current limitations and challenges are also be discussed to lay the foundation for future developments.
Download or read book Characterization of Multi wall Carbon Nanotubes and Their Applications written by Anestis Katsounaros and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes (CNT) and their applications is a field which has attract a lot of interest in the past two decades. Since the first invention of CNTs in 1991, and in view of utilising nanoantennas, the focus in many laboratories around the world has shifted to trying to lengthen nanotubes longer from nanometers to few centimeters. Eventually this could lead to CNTs' use in sub-millimeter, millimiter wave and microwave antenna applications. In this thesis, fundamental properties of carbon nanotube films are investigated, and some applications such as the use of CNTs as absorbers or CNT doped liquid crystals are considered. The concept of frequency tunable patch antennas is also presented. Simulation and measurement results of the liquid crystal based antenna show that frequency tuning is possible, through the use of a liquid crystal cell as a substrate. Additionally, greater tuning can be achieved using liquid crystals with higher dielectric anisotropy at microwave frequencies. This can be achieved by using CNT doped liquid crystals. As mentioned, microwave and terahertz measurements of vertically aligned carbon nanotube arrays placed on the top surface of a rectangular silicon substrate are presented. The S-parameters are calculated allowing the extraction of the complex permittivity, permeability and conductivity of the samples. Theoretical models are being introduced delineating the behaviour of the multi-walled nanotube (MWNT) samples. The material properties of this film provide useful data for potential microwave and terahertz applications such as absorbers. Finally, finite-difference time-domain (FDTD) modelling of CNTs is introduced, verifying the measurements that have been performed, confirming that CNT arrays can be highly absorptive. A novel estimation of the permittivity and permeability of an individual carbon nanotube is presented and a periodic structure is simulated, under periodic boundary conditions, consisting of solid anisotropic cylinders. In addition, the optical properties of vertically aligned carbon nanotube (V ACNT) arrays, when the periodicity is both within the sub-wavelength and wavelength regime are calculated. The effect of geometrical parameters of the tube such as length, diameter and inter-tube distance between two consecutive tubes are also examined.
Download or read book Nano and Cell Mechanics written by Horacio D. Espinosa and published by John Wiley & Sons. This book was released on 2012-12-12 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research in nano and cell mechanics has received much attention from the scientific community as a result of society needs and government initiatives to accelerate developments in materials, manufacturing, electronics, medicine and healthcare, energy, and the environment. Engineers and scientists are currently engaging in increasingly complex scientific problems that require interdisciplinary approaches. In this regard, studies in this field draw from fundamentals in atomistic scale phenomena, biology, statistical and continuum mechanics, and multiscale modeling and experimentation. As a result, contributions in these areas are spread over a large number of specialized journals, which prompted the Editors to assemble this book. Nano and Cell Mechanics: Fundamentals and Frontiers brings together many of the new developments in the field for the first time, and covers fundamentals and frontiers in mechanics to accelerate developments in nano- and bio-technologies. Key features: • Provides an overview of recent advances in nano and cell mechanics. • Covers experimental, analytical, and computational tools used to investigate biological and nanoscale phenomena. • Covers fundamentals and frontiers in mechanics to accelerate developments in nano- and bio-technologies. • Presents multiscale-multiphysics modeling and experimentation techniques. • Examines applications in materials, manufacturing, electronics, medicine and healthcare. Nano and Cell Mechanics: Fundamentals and Frontiers is written by internationally recognized experts in theoretical and applied mechanics, applied physics, chemistry, and biology. It is an invaluable reference for graduate students of nano- and bio-technologies, researchers in academia and industry who are working in nano and cell mechanics, and practitioners who are interested in learning about the latest analysis tools. The book can also serve as a text for graduate courses in theoretical and applied mechanics, mechanical engineering, materials science, and applied physics.
Download or read book Carbon Nanotube Polymer Composites written by Dimitrios Tasis and published by Royal Society of Chemistry. This book was released on 2015-11-09 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemically-modified carbon nanotubes (CNTs) exhibit a wide range of physical and chemical properties which makes them an attractive starting material for the preparation of super-strong and highly-conductive fibres and films. Much information is available across the primary literature, making it difficult to obtain an overall picture of the state-of-the-art. This volume brings together some of the leading researchers in the field from across the globe to present the potential these materials have, not only in developing and characterising novel materials but also the devices which can be fabricated from them. Topics featured in the book include Raman characterisation, industrial polymer materials, actuators and sensors and polymer reinforcement, with chapters prepared by highly-cited authors from across the globe. A valuable handbook for any academic or industrial laboratory, this book will appeal to newcomers to the field and established researchers alike.
