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Author: Abdolreza Javadi
Publisher:
ISBN:
Category :
Languages : en
Pages : 138
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Book Description
Author: Abdolreza Javadi
Publisher:
ISBN:
Category :
Languages : en
Pages : 138
Get Book Here
Book Description
Author: Abdolreza Javadi
Publisher:
ISBN:
Category :
Languages : en
Pages : 130
Get Book Here
Book Description
The objective of this study is to significantly advance the fundamental knowledge to enable scalable nano-manufacturing of metal-based nanocomposites by overcoming the grand challenges that exist in both fundamental and manufacturing levels. It especially seeks to manufacture bulk aluminum nanocomposite electrical conductors (ANECs) with uniform dispersion and distribution of nanoparticles that offer excellent mechanical and electrical properties. Polymer-metal nanocomposite is an emerging class of hybrid materials which can offer significantly improved functional properties (e.g. electrical conductivity). Incorporating proper nanoscale metallic elements into polymer matrices can enhance the electrical conductivity of the polymers. To achieve such polymer nanocomposites, the longstanding challenge of uniform dispersion of metal nanoparticles in polymers must be addressed. Conventional scale-down techniques often are only able to shrink larger elements (e.g. microparticles and microfibers) into micro/nano-elements (i.e. nanoparticles and nanofibers) without significant modification in their relative spatial and size distributions. This study uncovers an unusual phenomenon that tin (Sn) microparticles with both poor size distribution and spatial dispersion were stretched into uniformly dispersed and sized nanoparticles in polyethersulfone (PES) using thermal drawing method. It is believed that the capillary instability plays a crucial role during thermal drawing. This novel, inexpensive, and scalable method overcomes the longstanding challenge to produce bulk polymer-metal nanocomposites (PMNCs) with a uniform dispersion of metallic nano-elements (Chapter 3). Nano-elements (e.g. nanoparticles) are one of the most important constituent of the nanocomposite materials. Since titanium diboride (TiB2) nanoparticles is of a crucial factor in this study, and more importantly is not commercially available, we synthesized these reinforcements to ensure high purity and size uniformity. Our preliminary results show that TiB2 nanoparticles with a uniform size can be produced. Further characterization confirmed the presence of crystalline TiB2 nanoparticles with average size of 8.1i 0.4 nm. The in-house synthesized TiB2 nanoparticles were used to reinforce both aluminum and magnesium matrices. Successful incorporation of TiB2 nanoparticles in the aforementioned matrices was another indirection indication of high purity and surface-clean TiB2 nanoparticles (Chapter 4). Lightweight metallic systems (e.g. Al) have promising potentials for applications in metal-based laser additive manufacturing. Lightweight metals exhibit moderate mechanical properties compare to high density metals (e.g. steel). However, lightweight metal matrix nanocomposites (LMMNCs) offer excellent mechanical properties desirable to improve energy efficiency and system performance for widespread applications including, but not limited to, aerospace, transportation, electronics, automotive, and defense. It has been a longstanding challenge to realize a scalable manufacturing method to produce metal nanocomposite microparticles. This study demonstrates high volume manufacturing of Al and magnesiuim (Mg) nanocomposite microparticles. In-house synthesized TiB2 and commercial titanium carbide (TiC) nanoparticles were chosen as nano-scale reinforcements. Using a flux-assisted solidification processing method, up to 30% volume fraction nanoparticles were efficiently incorporated and dispersed into Al and Mg microparticles. Theoretical study on nanoparticle interactions in molten metals revealed that TiC and TiB2 nanoparticles can be self-dispersed and self-stabilized in molten Al and Mg matrices. Metal-based additive manufacturing and thermal spraying coating can significantly benefit from these novel Al and Mg nanocomposite microparticles. This simple yet scalable approach can broaden the applications of such nanocomposite in additive manufacturing of the functional parts. Moreover, the metal nanocomposite microparticles can be applied in conventional manufacturing processing. For example, bulk Al-30 volume percent (vol. %) nanocomposites were produced by cold compaction of Al-30 vol. % TiB2 nanocomposite microparticles followed by melting. Al-30 vol. % TiB2 nanocomposites with average Vickers hardness of 458 HV was successfully produced (Chapter 5). Magnesium is the lightest structure metal applied in broad range of applications in various industries such as biomedical, transportation, construction, naval and electronic. Strengthening Mg is of significance for energy efficiency of numerous transportation systems. Traditional metal strengthening approaches such as elemental alloying have reached their fundamental limits in offering high strength metals functioning at elevated temperature. Adding nanoparticle reinforcements can effectively promote the mechanical properties of Mg nanocomposites. However, manufacturing of bulk magnesium nanocomposites with populous and dispersed nanoparticles remains as a great challenge. Here we report a novel flux-assisted liquid state processing of bulk Mg nanocomposites with TiC as the nanoscale reinforcements. TiC nanoparticles with high hardness and high elastic modulus is well-distributed and uniformly dispersed in the Mg matrix, resulting in a significantly improved Vickers hardness of 143.5i 11.5 HV (pure Mg Vickers hardness is about 35 HV). Further theoretical study suggested that TiC nanoparticles can be self-dispersed and self-stabilized in Mg matrix (Chapter 6). Aluminum is one of the most abundant lightweight metal on Earth with a wide range of practical applications such as electrical wire. However, traditional aluminum manufacturing processing approaches such as elemental alloying, deformation and thermomechanical cannot offer further property improvement due to fundamental limitations. Successful incorporation of ceramic nanoparticles into aluminum have shown unusual property improvements. Adding metal-like ceramic nanoparticles into aluminum matrix can be a promising alternative to produce high performance aluminum electrical wires. Here we show a new class of aluminum nanocomposite electrical conductors (ANECs), with significantly improved average Vickers hardness (130 HV) and good electrical conductivity (41% IACS). The as-cast Al-3 vol. % TiB2 nanocomposites exhibit yield strength of 206.6 MPa, UTS of 219.6 MPa, tensile strain of 4.3% and electrical conductivity of 57.5% IACS (pure Al has yield strength of 35 MPa, UTS of 90 MPa, tensile strain of 12% and electrical conductivity of 62.5% IACS). We also observed an unusual ultra-fine grain (UFG) size, as small as 300 nm, in the ANEC samples under slow cooling. We believe that the significant mechanical property enhancements can be partially attributed to the existence of the UFG. Further investigations demonstrated that UFG can be achieved when nanoparticles are uniformly dispersed and distributed in the aluminum matrix (Chapter 7). In summary, analytical, numerical and experimental approaches have been established to significantly advance fundamental understanding of polymeric and metallic matrix nanocomposites, in particular the effect of metal-like ceramics on mechanical and electrical properties of lightweight metals. This study has demonstrated scalable production of multi-functional metal and polymer matrix nanocomposites. Metal-like ceramic nanoparticles can significantly enhance the mechanical properties of metal matrix while retaining good electrical properties.
Author: Vikas Mittal
Publisher: Woodhead Publishing
ISBN: 1782423214
Category : Technology & Engineering
Languages : en
Pages : 321
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Book Description
Manufacturing of Nanocomposites with Engineering Plastics collates recent research findings on the manufacturing, properties, and applications of nanocomposites with engineering plastics in one comprehensive volume. The book specifically examines topics of engineering plastics, rheology, thermo-mechanical properties, wear, flame retardancy, modeling, filler surface modification, and more. It represents a ready reference for managers and scholars working in the areas of polymer and nanocomposite materials science, both in industry and academia, and provides introductory information for people new to the field. Provides a comprehensive review of the most recent research findings A single one-stop ready reference that assimilates knowledge on the development of nanocomposites with engineering plastics Contributions from leading experts in the field Provides examples of applications that will help with material selection Chapters are designed to provide not only introductory information, but also to lead the reader to more advanced characterization tools
Author: James Njuguna
Publisher: Springer Science & Business Media
ISBN: 3642403220
Category : Technology & Engineering
Languages : en
Pages : 273
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Book Description
Advancements in the nanotechnology industry promise to offer improvements in capabilities across a spectrum of applications. This is of immense strategic importance to the high performance sector which has historically leveraged technological advances. The use of polymer nanocomposites in structures have several predictable impacts on structural design and applications, primarily by providing a safer, faster, and eventually cheaper transportation in the future. This books comprises reviews on the state-of-the-art, new research results, perspectives of future developments, and innovative applications relevant to structural materials, engineering structures, nanocomposites, modelling and simulations, and their related application areas.
Author: Gurminder Singh
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3111067769
Category : Science
Languages : en
Pages : 373
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Book Description
In today's society researchers are more focused on cleaner materials production for environmental sustainability. This approach aims at reducing waste and the development of materials with enhanced properties and functionality. This book focuses on optimizing manufacturing processes for sustainable composite materials. It discusses optimum utilization of resources by using minimum effort to save cost and energy.
Author: Baoguo Han
Publisher: Elsevier
ISBN: 0128199105
Category : Technology & Engineering
Languages : en
Pages : 605
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Book Description
Fiber-reinforced Nanocomposites: Fundamentals and Applications explores the fundamental concepts and emerging applications of fiber-reinforced nanocomposites in the automobile, aerospace, transportation, construction, sporting goods, optics, electronics, acoustics and environmental sector. In addition, the book provides a detailed overview of the properties of fiber-reinforced nanocomposites, including discussion on embedding these high-strength fibers in matrices. Due to the mismatch in structure, density, strain and thermal expansion coefficients between matrix and fibers, their thermo-mechanical properties strongly depend not only on the preparative methods, but also on the interaction between reinforcing phase and matrix phase. This book offers a concise overview of these advances and how they are leading to the creation of stronger, more durable classes of nanocomposite materials. Explores the interaction between fiber, nanoreinforcers and matrices at the nanoscale Shows how the properties of fiber-enforced nanocomposites are ideal for use for a variety of consumer products Outlines the major challenges to creating fiber-reinforced nanocomposites effectively
Author: Vikas Mittal
Publisher: John Wiley & Sons
ISBN: 111894593X
Category : Technology & Engineering
Languages : en
Pages : 544
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Book Description
Since the publication of the successful first edition of the book in 2010, the field has matured and a large number of advancements have been made to the science of polymer nanotube nanocomposites (PNT) in terms of synthesis, filler surface modification, as well as properties. Moreover, a number of commercial applications have been realized. The aim of this second volume of the book is, thus, to update the information presented in the first volume as well as to incorporate the recent research and industrial developments. This edited volume brings together contributions from a variety of senior scientists in the field of polymer nanotube composites technology to shed light on the recent advances in these commercially important areas of polymer technology. The book provides the following features: Reviews the various synthesis techniques, properties and applications of the polymer nanocomposite systems. Describes the functionalization strategies for single walled nanotubes in order to achieve their nanoscale dispersion in epoxy matrices. Provides insights into the multiscale modeling of the properties of PNT. Provides perspectives on the electron microscopy characterization of PNT. Presents an overview of the different methodologies to achieve micro-patterning of PNT. Describes the recent progress on hybridization modifications of CNTs with carbon nanomaterials and their further applications in polymer nanocomposites. Provides details on the foams generates with PNT. Provides information on synthesis and properties of polycarbonate nanocomposite. Describes the advanced microscopy techniques for understanding of the polymer/nanotube composite interfaces and properties.
Author: Cornelia Vasile
Publisher: MDPI
ISBN: 3038977667
Category : Technology & Engineering
Languages : en
Pages : 216
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Book Description
Because of the increasing pressure on both food safety and packaging/food waste, the topic is important both for academics, applied research, industry and also for environment protection. Different materials, such as glass, metals, paper and paperboards, and non-degradable and degradable polymers, with versatile properties, are attractive for potential uses in food packaging. Food packaging is the largest area of application within the food sector. Only the nanotechnology-enabled products in the food sector account for ~50% of the market value, with and the annual growth rate is 11.65%. Technological developments are also of great interest. In the food sector, nanotechnology is involved in packaging materials with extremely high gas barriers, antimicrobial properties, and also in nanoencapsulants for the delivery of nutrients, flavors, or aromas, antimicrobial, and antioxidant compounds. Applications of materials, including nanomaterials in packaging and food safety, are in forms of: edible films, polymer nanocomposites, as high barrier packaging materials, nanocoatings, surface biocides, silver nanoparticles as potent antimicrobial agents, nutrition and neutraceuticals, active/bioactive packaging, intelligent packaging, nanosensors and nanomaterial-based assays for the detection of food relevant analytes (gasses, small organic molecules and food-borne pathogens) and bioplastics.
Author: Sabu Thomas
Publisher: Elsevier
ISBN: 0128163038
Category : Technology & Engineering
Languages : en
Pages : 656
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Book Description
Unsaturated Polyester Resins: Fundamentals, Design, Fabrication, and Applications explains the preparation, techniques and applications relating to the use of unsaturated polyester resin systems for blends, interpenetrating polymer networks (IPNs), gels, composites and nanocomposites, enabling readers to understand and utilize the improved material properties that UPRs facilitate. Chapters cover unsaturated polyester resins and their interaction at the macro, micro and nano levels, in-depth studies on the properties and analysis of UPR based materials, and the applications of UPR based composites, blends, IPNs and gels across a range of advanced commercial and industrial fields. This is a highly detailed source of information on unsaturated polyester resins, supporting academics, researchers and postgraduate students working with UPRs, polyesters, polymeric or composite materials, polymer chemistry, polymer physics, and materials science, as well as scientists, R&D professionals and engineers in industry. Covers the use of unsaturated polyester resin systems for blends, IPNs, gels, composites and nanocomposites Presents cutting-edge techniques for the analysis and improvement of properties of advanced UPR-based materials Unlocks the potential of unsaturated polyester resins in high-performance materials for a range of advanced applications
Author: Jyotishkumar Parameswaranpillai
Publisher: John Wiley & Sons
ISBN: 3527839232
Category : Science
Languages : en
Pages : 389
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Book Description
Polymer Crystallization Control the development of polymer crystals with this groundbreaking introduction Polymer crystallization is a crucial component of polymer development that impacts processing, applications, presentation, and more. Intervention in the polymer crystallization process, in the form of nanofilters, compatibilizers, and more, has the potential to improve optical and chemical properties, improve degrees of crystallinity, and increase the hardness of polymer composites. The myriad applications of crystalline polymers make this one of the most exciting and fast-growing fields in polymer research. Polymer Crystallization provides a comprehensive introduction to this field and its most important recent developments. It characterizes and analysis an expansive range of crystalline polymers and discusses possible mechanisms for influencing their crystallization processes to impact a variety of outcomes and applications. These applications include industries from food packaging to automotive parts to medical and aerospace materials. Polymer Crystallization readers will also find: Detailed treatment of polymer morphology, rheology, modeling, and more Thorough introduction to the fundamentals of polymer crystallization Discussion of environmental safety issues and avenues for future research Polymer Crystallization is a useful reference for materials scientists, polymer scientists, biomedical scientists, and advanced undergraduate and graduate students in these and related fields.
