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Author: Andres Alvarez Publisher: ISBN: Category : Carbon composites Languages : en Pages : 122
Book Description
Current applications within areas such as electronics, military, and aerospace are demanding for lightweight and high-performing composite systems. More specifically, thermosetting formulations with minimal hazardous emissions that are used for high-temperature applications are in high demand. Cyanate ester resin (CE) has a high glass transition temperature (Tg, as high as 350oC), excellent flammability, thermal stability, mechanical properties, and it does not release harmful volatiles during the cure process. Multiwall carbon nanotubes (MWCNT) can offer excellent electrical and thermal conductivity, structural strength and stiffness, and thermal stability. The enhancement of the resin's properties is highly dependent on the qualitative and quantitative dispersion of MWCNT. In this research, CE was blended with MWCNT (0.5%, 1%, and 1.5% by weight) using a combination of a Planetary Centrifugal Mixer (THINKY) and a Stand Mixer. In order to improve dispersion, MWCNTs were processed with ceramic beads using the THINKY mixer to break-up the entangled nanoparticles. Transmission electron microscopy (TEM) was performed to evaluate separation of MWCNT entanglements. Carbon fiber-reinforced nanomodified cyanate ester composite panels were manufactured using a wet layup process followed by compression molding. Mechanical tests were then performed to evaluate tensile strength and modulus, flexural strength and modulus, compressive strength and modulus, and short-beam shear strength. Thermogravimetric analysis (TGA) was used to study the four different formulations thermal stability in both air and nitrogen. Lastly, the flammability properties were also analyzed with micro combustion calorimetry (MCC). Results were compared with control samples showing a positive effect of MWCNT on the final properties of carbon-reinforced cyanate ester composites.
Author: Andres Alvarez Publisher: ISBN: Category : Carbon composites Languages : en Pages : 122
Book Description
Current applications within areas such as electronics, military, and aerospace are demanding for lightweight and high-performing composite systems. More specifically, thermosetting formulations with minimal hazardous emissions that are used for high-temperature applications are in high demand. Cyanate ester resin (CE) has a high glass transition temperature (Tg, as high as 350oC), excellent flammability, thermal stability, mechanical properties, and it does not release harmful volatiles during the cure process. Multiwall carbon nanotubes (MWCNT) can offer excellent electrical and thermal conductivity, structural strength and stiffness, and thermal stability. The enhancement of the resin's properties is highly dependent on the qualitative and quantitative dispersion of MWCNT. In this research, CE was blended with MWCNT (0.5%, 1%, and 1.5% by weight) using a combination of a Planetary Centrifugal Mixer (THINKY) and a Stand Mixer. In order to improve dispersion, MWCNTs were processed with ceramic beads using the THINKY mixer to break-up the entangled nanoparticles. Transmission electron microscopy (TEM) was performed to evaluate separation of MWCNT entanglements. Carbon fiber-reinforced nanomodified cyanate ester composite panels were manufactured using a wet layup process followed by compression molding. Mechanical tests were then performed to evaluate tensile strength and modulus, flexural strength and modulus, compressive strength and modulus, and short-beam shear strength. Thermogravimetric analysis (TGA) was used to study the four different formulations thermal stability in both air and nitrogen. Lastly, the flammability properties were also analyzed with micro combustion calorimetry (MCC). Results were compared with control samples showing a positive effect of MWCNT on the final properties of carbon-reinforced cyanate ester composites.
Author: Moones Rahmandoust Publisher: Springer ISBN: 3319002511 Category : Technology & Engineering Languages : en Pages : 246
Book Description
This volume presents the characterization methods involved with carbon nanotubes and carbon nanotube-based composites, with a more detailed look at computational mechanics approaches, namely the finite element method. Special emphasis is placed on studies that consider the extent to which imperfections in the structure of the nanomaterials affect their mechanical properties. These defects may include random distribution of fibers in the composite structure, as well as atom vacancies, perturbation and doping in the structure of individual carbon nanotubes.
Author: Antonio Pantano Publisher: Smithers Rapra ISBN: 1847355870 Category : Science Languages : en Pages : 208
Book Description
Carbon nanotubes (CNTs) have amazing properties and a key way to take advantage of this is by incorporating nanotubes into a matrix to build composite materials. The best candidates for this task are undoubtedly polymers. Almost every characteristic of a polymer can be significantly enhanced by adding carbon nanotubes and as a result, new potential applications of carbon nanotube enhanced polymer composites are discovered every day. However, before carbon nanotube enhanced polymer composites become commonplace there are some tough challenges that need to be overcome. This book reviews the status of worldwide research in both single-walled and multi-walled carbon nanotube based composites. It serves as a practical guide on carbon nanotube based composites and a reference to students and researchers from the academia and industry.
Author: Marcio Loos Publisher: Elsevier ISBN: 145573196X Category : Technology & Engineering Languages : en Pages : 305
Book Description
Carbon Nanotube Reinforced Composites introduces a wide audience of engineers, scientists and product designers to this important and rapidly expanding class of high performance composites. Dr Loos provides readers with the scientific fundamentals of carbon nanotubes (CNTs), CNT composites and nanotechnology in a way which will enable them to understand the performance, capability and potential of the materials under discussion. He also investigates how CNT reinforcement can be used to enhance the mechanical, electrical and thermal properties of polymer composites. Production methods, processing technologies and applications are fully examined, with reference to relevant patents. Finally, health and safety issues related to the use of CNTs are investigated. Dr. Loos compares the theoretical expectations of using CNTs to the results obtained in labs, and explains the reasons for the discrepancy between theoretical and experimental results. This approach makes the book an essential reference and practical guide for engineers and product developers working with reinforced polymers – as well as researchers and students in polymer science, materials and nanotechnology. A wealth of applications information is included, taken from the wide range of industry sectors utilizing CNT reinforced composites, such as energy, coatings, defense, electronics, medical devices, and high performance sports equipment. Introduces a wide range of readers involved in plastics engineering, product design and manufacturing to the relevant topics in nano-science, nanotechnology, nanotubes and composites. Assesses effects of CNTs as reinforcing agents, both in a materials context and an applications setting. Focuses on applications aspects – performance, cost, health and safety, etc – for a wide range of industry sectors, e.g. energy, coatings, defense, electronics, medical devices, high performance sports equipment, etc.
Author: Peng-Cheng Ma Publisher: CRC Press ISBN: 1439826242 Category : Technology & Engineering Languages : en Pages : 210
Book Description
Discovered in the twentieth century, carbon nanotubes (CNT) were an integral part of science and industry by the beginning of the twenty first century, revolutionizing chemistry, physics, and materials science. More recent advances in carbon nanotube production methods have resulted in a tremendous push to incorporate CNTs into polymer matrices. Al
Author: Roham Rafiee Publisher: Elsevier ISBN: 0323482228 Category : Science Languages : en Pages : 588
Book Description
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
Author: Arvind Agarwal Publisher: CRC Press ISBN: 1439811504 Category : Technology & Engineering Languages : en Pages : 318
Book Description
From the Foreword, written by legendary nano pioneer M. Meyyappan, Chief Scientist for Exploration Technology NASA Ames Research Center, Moffett Field, California, USA: "...there is critical need for a book to summarize the status of the field but more importantly to lay out the principles behind the technology. This is what Professor Arvind Agarwal and his co-workers ... have done here." Carbon Nanotubes: Reinforced Metal Matrix Composites reflects the authors’ desire to share the benefits of nanotechnology with the masses by developing metal matrix carbon nanotube (MM-CNT) composites for large-scale applications. Multiwall carbon nanotubes can now be produced on a large scale and at a significantly reduced cost. The book explores potential applications and applies the author’s own research to highlight critical developmental issues for different MM-CNT composites—and then outline novel solutions. With this problem-solving approach, the book explores: Advantages, limitations, and the evolution of processing techniques used for MM-CNT composites Characterization techniques unique to the study of MM-CNT composites—and the limitations of these methods Existing research on different MM-CNT composites, presented in useful tables that include composition, processing method, quality of CNT dispersion, and properties The micro-mechanical strengthening that results from adding CNT The applicability of micro-mechanics models in MM-CNT composites Significance of chemical stability for carbon nanotubes in the metal matrix as a function of processing, and its impact on CNT/metal interface and mechanical properties Computational studies that have not been sufficiently covered although they are essential to research and development The critical issue of CNT dispersion in the metal matrix, as well as a unique way to quantify CNT distribution and subsequently improve control of the processing parameters for obtaining improved properties Carbon Nanotubes: Reinforced Metal Matrix Composites paints a vivid picture of scientific and application achievements in this field. Exploring the mechanisms through which CNTs are enhancing the properties of different metal-based composites, the authors provide a roadmap to help researchers develop MM-CNT composites and choose potential materials for use in emerging areas of technology.
Author: Dimitrios Tasis Publisher: Royal Society of Chemistry ISBN: 1782625828 Category : Technology & Engineering Languages : en Pages : 293
Book Description
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.
Author: Ravikumar Vijayan Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 53
Book Description
In the recent years research has been focused on improving the properties of the polymeric resins. The use of nanomaterial inclusions as reinforcement for better properties has been a key chapter in the field of polymeric composite materials. Carbon Nanotubes (CNTs) and other nanomaterial inclusions can provide considerable improvement to the properties of polymer composites. In this research, the Multiwall Carbon nanotube (MWCNTs) and Carbon NanoHeliCoils (CNHCs) were used as nano-inclusions in the epoxy resin. The CNHCs and MWCNTs were dispersed in a resin using a solvent and later heated and stirred continuously until the solvent was evaporated. Next, the hardener was added to the mixture and cured in room temperature that was later followed by post curing in an oven for optimum properties. Different weight ratios of CNHCs and MWCNTs were used to fabricate nanocomposite panels. The goal in this research was to find out the optimum values of weight ratios for improvement of mechanical properties of the nanocomposites as well as to study the relationship between the weight percentage of nanoreinforcements used to improve the thermal and dielectric properties of the nanocomposites. Test samples were prepared with different weight ratios of nanoreinforcement for tensile testing, Single Edge Notch Bending (SNEB), hardness testing, dielectric constant and thermal conductivity testing, according to ASTM standards. It was observed that the CNHCs and MWCNTs reinforcements perform the best for mechanical properties improvements at 0.05% and 0.1% loading respectively. However both Dielectric constant and Thermal Conductivity of the nanocomposites were improved as the CNTs concentration was increased, regardless of their geometrical configurations. In addition, scanning electron microscopy and high-resolution optical microscopy was used to characterize the fractured surfaces and investigate the failure modes of test samples.
Author: Andres Alvarez
Author: Andres Alvarez
Author: Moones Rahmandoust
Author: 
Author: Antonio Pantano
Author: Marcio Loos
Author: Peng-Cheng Ma
Author: Roham Rafiee
Author: Arvind Agarwal
Author: Dimitrios Tasis
Author: Ravikumar Vijayan