Download or read book Investigation of Electrical and Impact Properties of Carbon Fiber Reinforced Polymer Matrix Composites with Carbon Nanotube Buckypaper Layers written by Christopher Brandon Hill and published by . This book was released on 2012 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon fiber reinforced composite materials have become commonplace in many industries including aerospace, automotive, and sporting goods. Previous research has determined a coupling relationship between the mechanical and electrical properties of these materials where the application of electrical current has been shown to improve their mechanical strengths. The next generations of these composites have started to be produced with the addition of nanocarbon buckypaper layers which provide even greater strength and electrical conductivity potentials. The focus of this current research was to characterize these new composites and compare their electro-mechanical coupling capabilities to those composites which do not contain any nanocarbons.
Download or read book Carbon Nanotube Reinforced Polymers written by Roham Rafiee and published by Elsevier. This book was released on 2017-10-06 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanotube-Reinforced Polymers: From Nanoscale to Macroscale addresses the advances in nanotechnology that have led to the development of a new class of composite materials known as CNT-reinforced polymers. The low density and high aspect ratio, together with their exceptional mechanical, electrical and thermal properties, render carbon nanotubes as a good reinforcing agent for composites. In addition, these simulation and modeling techniques play a significant role in characterizing their properties and understanding their mechanical behavior, and are thus discussed and demonstrated in this comprehensive book that presents the state-of-the-art research in the field of modeling, characterization and processing. The book separates the theoretical studies on the mechanical properties of CNTs and their composites into atomistic modeling and continuum mechanics-based approaches, including both analytical and numerical ones, along with multi-scale modeling techniques. Different efforts have been done in this field to address the mechanical behavior of isolated CNTs and their composites by numerous researchers, signaling that this area of study is ongoing. Explains modeling approaches to carbon nanotubes, together with their application, strengths and limitations Outlines the properties of different carbon nanotube-based composites, exploring how they are used in the mechanical and structural components Analyzes the behavior of carbon nanotube-based composites in different conditions
Download or read book Carbon Nanofiber Reinforced Polymer Composites written by Ronald L. Poveda and published by Springer. This book was released on 2015-09-15 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an extensive review of literature on the properties of carbon nanofibers (CNF) reinforced polymer composites in conjunction with advances in the production and properties of CNFs. It further provides readers a view into the development of lightweight composites whose properties are tailored and enhanced with micro- and nano-reinforcement, along with results from data comparisons from several published investigations.
Download or read book Impact Properties of Carbon Fiber Reinforced Polymer Matrix Composites written by Philippe Michael Dekleva and published by . This book was released on 1992 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Electrical and Impact Properties of Carbon Fiber Textile Composites written by Bryne Berry and published by . This book was released on 2014 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 3D Fibre Reinforced Polymer Composites written by L. Tong and published by Elsevier. This book was released on 2002-11-20 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre reinforced polymer (FRP) composites are used in almost every type of advanced engineering structure, with their usage ranging from aircraft, helicopters and spacecraft through to boats, ships and offshore platforms and to automobiles, sports goods, chemical processing equipment and civil infrastructure such as bridges and buildlings. The usage of FRP composites continues to grow at an impessive rate as these materials are used more in their existing markets and become established in relatively new markets such as biomedical devices and civil structures. A key factor driving the increased applications of composites over the recent years is the development of new advanced forms of FRP materials. This includes developments in high performance resin systems and new styles of reinforcement, such as carbon nanotubes and nanoparticles. This book provides an up-to-date account of the fabrication, mechanical properties, delamination resistance, impact tolerance and applications of 3D FRP composites. The book focuses on 3D composites made using the textile technologies of weaving, braiding, knitting and stiching as well as by z-pinning.
Download or read book Processing and Characterization of Carbon Nanoparticle fiber reinforced Polymer Composites written by Alejandro Jose Rodriguez and published by . This book was released on 2010 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes (CNTs) and carbon nanofibers (CNFs) have an exceptional combination of properties that make them ideal materials for use as reinforcing particles in advanced composites. This investigation was aimed at obtaining fundamental understanding of the processing and properties of carbon nanoparticle/fiber-reinforced polymer composites -defined as multiscalereinforced polymer composites (MRPCs)- manufactured through a practical and scalable process. Such process consists of two stages. The first stage involves the synthesis of multiscalereinforcement fabrics (MRFs) by electrophoretic deposition of carboxylic acid- or aminefunctionalized CNTs and CNFs onto the surface of carbon fiber layers in aqueous medium; while the second stage proceeds with the stacking of the MRFs and infusion of the resulting preforms with an epoxy-amine resin system to obtain the MRPC. MRPCs manufactured following the described approach were tested for mechanical and electrical properties. Mechanical test results showed an increase in interlaminar shear strength (ILSS), shear stiffness, and compressive strength of all panels manufactured. Panels containing amine-functionalized carbon nanoparticles had the highest increase in properties: 13% in ILSS, 2.5-4 fold in shear stiffness, and up to 15% in compressive strength. On the other hand, it was found that through-plane electrical conductivity of MRPCs increased by 100% when using unsized MRFs. Investigation into the enhancement mechanism of mechanical and electrical properties was also performed. Discussion of these mechanisms are presented with emphasis placed on the fiber/matrix interface and the load transfer mechanisms between matrix, carbon nanoparticles, and carbon fiber.
Download or read book Characterization of Carbon Fiber Polymer Matrix Composites Subjected to Simultaneous Application of Electric Current Pulse and Low Velocity Impact written by Robert James Hart and published by . This book was released on 2011 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of composite materials in aerospace, electronics, and wind industries has become increasingly common, and these composite components are required to carry mechanical, electrical, and thermal loads simultaneously. A unique property of carbon fiber composites is that when an electric current is applied to the specimen, the mechanical strength of the specimen increases. Previous studies have shown that the higher the electric current, the greater the increase in impact strength. However, as current passes through the composite, heat is generated through Joule heating. This Joule heating can cause degradation of the composite and thus a loss in strength. In order to minimize the negative effects of heating, it is desired to apply a very high current for a very short duration of time. This thesis investigated the material responses of carbon fiber composite plates subjected to electrical current pulse loads of up to 1700 Amps. For 32 ply unidirectional IM7/977-3 specimens, the peak impact load and absorbed energy increased slightly with the addition of a current pulse at the time of an impact event. In 16 ply cross-ply IM7/977-2 specimens, the addition of the current pulse caused detrimental effects due to electrical arcing at the interface between the composite and electrodes. Further refinement of the experimental setup should minimize the risk of electrical arcing and should better elucidate the effects of a current pulse on the impact strength of the specimens.
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 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 Carbon Composites written by Eduardo A. Castro and published by CRC Press. This book was released on 2023-05-31 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the innovative methodologies and strategies adopted in carbon materials research area including: Synthesis, characterization, and functionalization of carbon nanotubes and graphene Surface modification of graphene Carbon-based nanostructured materials The use of carbon nanomaterials for energy applications Development of carbon nanotubes reinforced metal matrix composites and non-metallic composites and their myriad potential end-use applications Key challenges to the successful and widespread implementation of carbon nanotubes reinforced metal matrix composites and non-metallic composites Methods for quantification and improved control of carbon nanotubes distributions Recent research and design trends for carbon nanomaterials-based sensors for a variety of applications Advances and potential applications in environmental monitoring and healthcare
Download or read book Processing and Characterization of Carbon Nanotubes Reinforced Epoxy Resin Based Multi scale Multi functional Composites written by Piyush R. Thakre and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research is focused on investigating the effect of carbon nanotubes on macroscale composite laminate properties, such as, interlaminar shear strength, interlaminar fracture toughness and electrical conductivity along with studying the micro and nano-scale interactions of carbon nanotubes with epoxy matrix via thermomechanical and electrical characterization of nanocomposites. First an introduction to the typical advanced composite laminates and multifunctional nanocomposites is provided followed by a literature review and a summary of recent status on the processing and the characterization work on nanocomposites and composite laminates. Experimental approach is presented for the development of processing techniques and appropriate characterization methods for carbon nanotubes reinforced epoxy resin based multi-functional nanocomposites and carbon fiber reinforced polymer composite laminates modified with carbon nanotubes. The proposed work section is divided into three sub-sections to describe the processing and the characterization of carbon nanotube reinforced epoxy matrix nanocomposites, woven-carbon fabric epoxy matrix composite laminates modified with selective placement of nanotubes and unidirectional carbon fiber epoxy matrix composite laminates modified with carbon nanotubes. Efforts are focused on comparing the effects of functionalized and unfunctionalized carbon nanotubes on the advanced composite laminates. Covalently functionalized carbon nanotubes are used for improved dispersion and fiber-matrix bonding characteristics and compared with unfunctionalized or pristine carbon nanotubes. The processing of woven carbon fabric reinforced epoxy matrix composite laminates is performed using a vacuum assisted resin transfer molding process with selective placement of carbon nanotubes using a spraying method. The uni-directional carbon fiber epoxy matrix pre-preg composites are processed using a hot press technique along with the spraying method for placement of nanotubes. These macroscale laminates are tested using short beam shear and double cantilever beam experiments for investigating the effect of nanotubes on the interlaminar shear stress and the interlaminar fracture toughness. Fractography is performed using optical microscopy and scanning electron microscopy to investigate the structure-property relationship. The micro and nano-scale interactions of carbon nanotubes and epoxy matrix are studied through the processing of unfunctionalized and functionalized single wall carbon nanotube reinforced epoxy matrix nanocomposites. The multifunctional nature of such nanocomposites is investigated through thermo-mechanical and electrical characterizations.
Download or read book Carbon Fiber Carbon Nanotube Hybrid Composite Manufacturing Mechanical Property and Microstructure Characterization Study for High Performance Structural Applications written by Claire Jolowsky and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon fiber (CF) composites are implemented into more and more engineering applications due to their superior strength to weight ratio over traditional materials. However, inhomogeneous microstructures of composite laminates may bring some challenges when implemented into applications. For example, due to the manufacturing methods typically used to manufacture the composite parts, there may be a resin-rich layer between the carbon fiber layers which will ultimately end up reducing the overall mechanical properties of the composite. Use of carbon nanotubes (CNTs) are a promising step forward in composite materials as evidence shows an improved strength to weight ratio over that of carbon fiber with the addition of having multifunctional capabilities. Furthermore, CNTs are at the nano or sub-microscale, and are potentially able to reduce resin-rich issues that are present in traditional composites. In this research, we focus on the scale-up study of selected CNT and CNT/CF hybrid composite concepts using continuous CNT materials, aerospace certified resin matrices, and aerospace quality manufacturing processes. The goal of this research is to gain a fundamental understanding of new CNT/CF hybrid microstructures and microstructure-property relationships of these new composites.We manufactured highly aligned CNT sheet composites via stretching process, the results show the high mechanical properties which are comparable to unidirectional carbon fiber laminates. The high degree of alignment, self-assembling, and dense packing achieved within the CNT networks are major factors which contribute to the performance of the composite. We also successfully manufactured unidirectional yarn composites via filament winding and stretching processes. The results show an attractive method of scalability to manufacture high strength CNT panels. To study the effect of CNTs on the GIC of laminates, we manufactured aerospace-quality and ASTM standard double cantilever beam test samples with different CNT layer configurations, the preliminary results show the weak interfacial bonding present within the CNT networks resulting in the low GIC property. Finally, we manufactured CNT yarn/CF hybrid unidirectional laminates to the study the effect on the microstructure and mechanical properties with the addition of aligned CNT layers. The goal is to increase overall reinforcement volume fraction and simultaneously reduce resin rich areas. Each of these results advance the fundamental understanding of the effect of CNT sheets, socks and yarns on manufacturing processes, microstructure, mechanical properties, and failure modes on traditional carbon fiber laminates for potential scaled-up structural applications.
Download or read book Manipulation of Carbon Nanoparticles in Composites for Improved Electrical Properties written by Manuel Maria Vilão Cruz Gião Morais and published by Fraunhofer Verlag. This book was released on 2021-01-27 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the electrical properties of epoxy nanocomposites with carbon nanoparticles as conductive filler are investigated for different processing conditions. Compared to a classical shaping process for epoxy materials, the application of electric fields during the curing process is used as an additional process parameter. Electric fields are applied to the nanocomposites during curing, influencing the electrical properties of the final material by inducing polarization and dipole interactions between the conductive particles (dielectrophoresis), leading to a new micro- and nanostructure of the conductive network. This phenomenon is studied for a system of single-wall carbon nanotube and the impact of processing parameters on the electrical response of the system is evaluated. A scalable process based on resin transfer moulding for producing nanocomposites under electric fields is developed. This processing technique presents promising results for enhancing and tailoring the electrical conductivity of polymer nanocomposites.
Download or read book Enhancing Tensile Properties of Carbon Fiber reinforced Polypropylene Composite Using Carbon Nanotube Coating written by Sharifah Mazrah binti Sayed Mohamed Zain and published by . This book was released on 2009 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon fibers, when used without any surface treatments, will produce composites with low interlaminar shear strength (ILSS) which attributed largely to weak bonding between the fiber and the matrix. CNT-coating treatment was conducted to improve carbon fiber-matrix interfacial bonding. This treatment was done by growing carbon nanotubes (CNTs) directly on carbon fibers using chemical vapor deposition (CVD) to create CNT-coated carbon fibers. The objectives was to study the microscopic morphology of CNTs formation on the surface of carbon fibers at various treatment conditions, to study the interfacial shear strength (IFSS) of CNT-coated carbon fibers, tensile properties and thermal stability of CNT-coated carbon fiber composites as well as comparison with untreated and commercial carbon fibers. The CNTs were produced by a benzene-ferrocene gas reaction inside a high temperature tube furnace. The reaction temperature, the carrier gas flow rate and weight of ferrocene were varied at 700 oC, 800oC and 900oC; 100 ml/min and 300 ml/min; 0.3 g, 0.5 g and 1.0 g respectively and the reaction time for CNT growth was set at 30 minutes. The microscopic morphology of CNTs formation on the surface of carbon fibers was observed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) before it was fabricated into composites. The composites were prepared by melt blending with polypropylene (PP) at different fiber content of 2, 4, 6, 8, 10 and 12 wt. %. It showed that CNTs were successfully grown on carbon fibers at reaction temperature of 800oC and 900oC. Interfacial shear strength of CNT-coated fibers improved up to 499% compared to untreated fibers. Tensile properties increased with the increase of fiber loading from 2 wt. % - 10 wt. % and decreased at 12 wt. % fiber content. With addition of 10 wt. % of CNT-coated CFPP composites, the tensile strength and modulus increased up to 36% and 85%, respectively. CNT-coated CFPP composites were more resistant to deformation, but had lower strength when compared with commercial CFPP composites. The thermal stability of CNT-coated CFPP composites showed an increment compared to the untreated CFPP composite. As conclusion, CNT-coating treatment using parameters treated at reaction temperature of 800oC; 300 ml/min hydrogen flow rate and 1.0 g of ferrocene showed the most amounts of CNTs with fewer impurities which also exhibited the best performance in IFSS, tensile properties and highest onset degradation temperature, 325oC making it the best designation for this CNT-coating treatment using current thermal CVD set-up.
Download or read book Electropolymerization on Carbon Fibers Effects on Composite Properties written by R. V. Subramanian and published by . This book was released on 1976 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interface tailoring in carbon fiber-polymer composites by means of electrochemical polymerization has been investigated. It was expected that fiber-matrix adhesion and composite mechanical properties can be modified by the electrochemical formation of polymer layers of varying structure and properties on carbon fibers prior to their incorporation in a polymer matrix. Techniques were developed first for producing thin polymer coatings on carbon fibers by using the latter as electrodes in an electrolytic cell containing the monomer. Composite specimens were prepared by the incorporation of the coated fibers in an epoxy matrix. It was demonstrated that, in fact, the effect of the surface treatment on the interfacial properties of the resulting composite was manifested in variations of the measured interlaminar shear and impact strengths of the composite specimens. The increase in interlaminar shear was considered to be the result of improved fiber-matrix adhesion when compared to composite specimens prepared from untreated carbon fibers. The corresponding reversed trend in impact strength values was attributed to the effect of excessive fiber-matrix adhesion in causing brittle failure of the composite. It was significant, when in exception to this general trend, it was also found that both interlaminar shear and impact strengths could simultaneously be increased.
Download or read book Fundamentals of Conjugated Polymer Blends Copolymers and Composites written by Parveen Saini and published by John Wiley & Sons. This book was released on 2015-04-30 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since their discovery in 1977, the evolution of conducting polymers has revolutionized modern science and technology. These polymers enjoy a special status in the area of materials science yet they are not as popular among young readers or common people when compared to other materials like metals, paper, plastics, rubber, textiles, ceramics and composites like concrete. Most importantly, much of the available literature in the form of papers, specific review articles and books is targeted either at advanced readers (scientists / technologists / engineers / senior academicians) or for those who are already familiar with the topic (doctoral / postdoctoral scholars). For a beginner or even school / college students, such compilations are bit difficult to access / digest. In fact, they need proper introduction to the topic of conducting polymers including their discovery, preparation, properties, applications and societal impact, using suitable examples and already known principles/knowledge/phenomenon. Further, active participation of readers in terms of "question & answers", "fill-in-the-blanks", "numerical" along with suitable answer key is necessary to maintain the interest and to initiate the "thought process". The readers also need to know about the drawbacks and any hazards of such materials. Therefore, I believe that a comprehensive source on the science / technology of conducting polymers which maintains a link between grass root fundamentals and state-of-the-art R&D is still missing from the open literature.
