Multifunctional Nanocomposite Foams For Space Applications
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Multifunctional Nanocomposite Foams For Space Applications
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Author : Diandra J. Rollins
language : en
Publisher:
Release Date : 2016
Multifunctional Nanocomposite Foams For Space Applications written by Diandra J. Rollins and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Electronic dissertations categories.
Multifunctional Polymeric Foams
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Author : Soney C. George
language : en
Publisher: CRC Press
Release Date : 2023-03-24
Multifunctional Polymeric Foams written by Soney C. George and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-03-24 with Technology & Engineering categories.
Provides description of functional foams, their manufacturing methods, properties, and applications Covers various blowing agents, greener methods for foaming, and emerging applicability Illustrates comparative information regarding polymeric foams and recent developments with polymer nanocomposite foams Includes applications in mechanical, civil, biomedical, food packaging, electronics, health care industry, and acoustics fields Reviews elastomeric foams and their nanocomposite derivatives
Multifunctional Polymeric Foams
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Author : Soney C. George
language : en
Publisher: CRC Press
Release Date : 2023-03-24
Multifunctional Polymeric Foams written by Soney C. George and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-03-24 with Technology & Engineering categories.
Polymeric foams or cellular or expanded polymers have characteristics that makes their usage possible for several industrial and household purposes. This book is focused on the recent advancements in the synthesis of polymer foams, various foaming methods, foaming technology, mechanical and physical properties, and the wide variety of its applications. Divided into 11 chapters, it explains empirical models connecting the geometrical structure of foams with their properties including structure-property relations. This book: Describes functional foams, their manufacturing methods, properties, and applications. Covers various blowing agents, greener methods for foaming, and their emerging applicability. Illustrates comparative information regarding polymeric foams and their recent developments with polymer nanocomposite foams. Includes applications in mechanical, civil, biomedical, food packaging, electronics, health care industry, and acoustics fields. Reviews elastomeric foams and their nanocomposite derivatives. This book is aimed at researchers and graduate students in materials science, mechanical engineering, and polymer science.
Polymer Nanocomposite Foams
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Author : Vikas Mittal
language : en
Publisher: CRC Press
Release Date : 2013-10-18
Polymer Nanocomposite Foams written by Vikas Mittal and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-18 with Technology & Engineering categories.
Advancements in polymer nanocomposite foams have led to their application in a variety of fields, such as automotive, packaging, and insulation. Employing nanocomposites in foam formation enhances their property profiles, enabling a broader range of uses, from conventional to advanced applications. Since many factors affect the generation of nanostructured foams, a thorough understanding of structure–property relationships in foams is important. Polymer Nanocomposite Foams presents developments in various aspects of nanocomposite foams, providing information on using composite nanotechnology for making functional foams to serve a variety of applications. Featuring contributions from experts in the field, this book reviews synthesis and processing techniques for preparing poly(methyl methacrylate) nanocomposite foams and discusses strategies for toughening polymer foams. It summarizes the effects of adding nanoclay on polypropylene foaming behavior and describes routes to starch foams for improved performance. The books also reviews progress in achieving high-performance lightweight polymer nanocomposite foams while keeping desired mechanical properties, examines hybrid polyurethane nanocomposite foams, and covers polymer–clay nanocomposite production. The final chapters present recent advances in the field of carbon nanotube/polymer nanocomposite aerogels and related materials as well as a review of the nanocomposite foams generated from high-performance thermoplastics. Summing up the most recent research developments in the area of polymer nanocomposite foams, this book provides background information for readers new to the field and serves as a reference text for researchers.
Polymer Nanocomposite Foams
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Author : Yongha Kim
language : en
Publisher:
Release Date : 2012
Polymer Nanocomposite Foams written by Yongha Kim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Polymer nanocomposite foams have attracted tremendous interests due to their multifunctional properties in addition to the inherited lightweight benefit of being foamed materials. Polymer nanocomposite foams using high performance polymer and bio-degradable polymer with carbon nanotubes were fabricated, and the effects of foam density and pore size on properties were characterized. Electrical conductivity modeling of polymer nanocomposite foams was conducted to investigate the effects of density and pore size. High performance polymer Polyetherimide (PEI) and multi-walled carbon nanotube (MWCNT) nanocomposites and their foams were fabricated using solvent-casting and solid-state foaming under different foaming conditions. Addition of MWCNTs has little effect on the storage modulus of the nanocomposites. High glass transition temperature of PEI matrix was maintained in the PEI/MWCNT nanocomposites and foams. Volume electrical conductivities of the nanocomposite foams beyond the percolation threshold were within the range of electro-dissipative materials according to the ANSI/ESD standard, which indicates that these lightweight materials could be suitable for electro-static dissipation applications with high temperature requirements. Biodegradable Polylactic acid (PLA) and MWCNT nanocomposites and their foams were fabricated using melt-blending and solid-state foaming under different foaming conditions. Addition of MWCNTs increased the storage modulus of PLA/MWCNT composites. By foaming, the glass transition temperature increased. Volume electrical conductivities of foams with MWCNT contents beyond the percolation threshold were again within the range of electro-dissipative materials according to the ANSI/ESD standard. The foams with a saturation pressure of 2 MPa and foaming temperature of 100 °C showed a weight reduction of 90% without the sacrifice of electrical conductivity. This result is promising in terms of multi-functionality and material saving. At a given CNT loading expressed as volume percent, the electrical conductivity increased significantly as porosity increased. A Monte-Carlo simulation model was developed to understand and predict the electrical conductivity of polymer/MWCNT nanocomposite foams. Two different foam morphologies were considered, designated as Case 1: volume expansion without nanotube rearrangement, and Case 2: nanotube aggregation in cell walls. Simulation results from unfoamed nanocomposites and the Case 1 model were validated with experimental data. The results were in good agreement with those from PEI/MWCNT nanocomposites and their foams, which had a similar microstructure as modeled in Case 1. Porosity effects on electrical conductivity were investigated for both Case 1 and Case 2 models. There was no porosity effect on electrical conductivity at a given volume percent CNT loading for Case 1. However, for Case 2 the electrical conductivity increased as porosity increased. Pore size effect was investigated using the Case 2 model. As pore size increased, the electrical conductivity also increased. Electrical conductivity prediction of foamed polymer nanocomposites using FEM was performed. The results obtained from FEM were compared with those from the Monte-Carlo simulation method. Feasibility of using FEM to predict the electrical conductivity of foamed polymer nanocomposites was discussed. FEM was able to predict the electrical conductivity of polymer nanocomposite foams represented by the Case 2 model with various porosities. However, it could not capture the pore size effect in the electrical conductivity prediction. The FEM simulation can be utilized to predict the electrical conductivity of Case 2 foams when the percolation threshold is determined by Monte-Carlo simulation to save the computational time. This has only been verified when the pore size is small in the range of a few micrometers.
Graphene Production And Application
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Author : Sadia Ameen
language : en
Publisher: BoD – Books on Demand
Release Date : 2020-05-06
Graphene Production And Application written by Sadia Ameen and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-06 with Technology & Engineering categories.
Graphene is a super thin and strong material with potential to revolutionize the field of technology. As such, graphene is quickly attracting attention from researchers seeking to identify new concepts and applications of this “supermaterial.” Graphene Production and Application is a comprehensive and easy-to-understand source of information on the advances in the growing research on graphene. Written by experts in the field, this book covers the topics of synthetic approaches, characterization techniques, and applications of graphene. It is ideally suited for a broad range of readers including students, instructors, and professionals.
Polymer Based Nanocomposites As Multifunctional Structure For Space Radiation Shielding
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Author : Siyuan Chen
language : en
Publisher:
Release Date : 2018
Polymer Based Nanocomposites As Multifunctional Structure For Space Radiation Shielding written by Siyuan Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Extraterrestrial radiation categories.
Radiation shielding in space missions is critical in order to protect astronauts and other payloads from radiation damage. Low atomic-number materials such as hydrogen are proved to be efficient in shielding ionizing radiations, but the relatively poor thermal and mechanical properties compared to metallic alloys has limited their applications. Conventional material aluminum (Al) is widely used in space applications as structural and radiation shielding material. However, the issues related to heavy weight and extra secondary radiation generation make pure metals not suitable for modern space radiation shielding. Currently, conventional shielding materials including Al, high density polyethylene (HDPE), and water have been jointly applied as radiation shielding parts on spacecraft. Disadvantages such as low thermal properties (HDPE), high atomic number (Al) and complex maintenance system (water) have resulted in heavy load and high-cost in space missions. One approach to replace high atomic number metals is deploying hydrogen rich polymers enhanced with nanofillers associating mechanically strong composite carbon fiber reinforce plastic (CFRP) that has been proposed in this research. Polymer based nanocomposite can achieve improved physical properties such as thermal properties, while at the same time it can provide adequate radiation shielding function with lower weight and less secondary radiation generation. By reviewing nanotechnologies for radiation shielding, multi-walled carbon nanotube (MWCNT) and bismuth oxide (Bi2O3) nanoparticle were carried out to enhance properties of poly(methyl-methacrylate) (PMMA). The role of nanofillers embedded in PMMA matrix, in terms of radiation shielding effectiveness, were experimentally evaluated by comparing the proton transmission properties and secondary neutron production of the PMMA/MWCNT nanocomposite and electron transmission properties of PMMA/MWCNT/Bi2O3 nanocomposite with pure PMMA and Al. The results indicate that the addition of MWCNT in PMMA matrix can not only further reduce the secondary neutron production of the pure polymer, but also show significant reduction in weight compared to Al. Furthermore, the adoption of Bi2O3 illustrates reduced areal density of nanocomposite over Al under the same electron radiation energies. However, enhanced thermal properties of nanocomposite is required to make it a potential candidate for radiation shielding in space applications. As a result, an optimization of nanocomposites and methods to apply its multiple functions onto CFRP structure have been accomplished. After all, a prototype was designed and produced with improved properties of nanocomposite. The low-cost component has shown potentials to replace conventional radiation shielding material Al alloys with high ratio of radiation shielding effectiveness and weight.
Polymeric Nanocomposites With Carbonaceous Nanofillers For Aerospace Applications
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Author : Ayesha Kausar
language : en
Publisher: Elsevier
Release Date : 2022-10-14
Polymeric Nanocomposites With Carbonaceous Nanofillers For Aerospace Applications written by Ayesha Kausar and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-14 with Technology & Engineering categories.
Polymeric Nanocomposites with Carbonaceous Nanofillers for Aerospace Applications offers a comprehensive paperback on the aerospace relevance of polymer/carbonaceous nanofiller-based nanocomposite. This manuscript summarizes all the specific information on the design, fabrication, and application areas of aerospace industry employing polymer/carbonaceous nanofiller-based nanocomposites. Various polymeric composites have been applied in aerospace industry. However, recent aerospace research is turning towards the versatile nanocomposites. Initially, essential aspects of multifunctional nanocomposites have been discussed here considering the carbonaceous nano-reinforcements, functionalization, and dispersion of nanofillers with reference to the aeronautical applications. Consequently, various categories of polymer/carbonaceous nanofiller derived nanocomposites have been conferred for aerospace aptitude. Inclusion of carbonaceous nanofillers in polymeric resins considerably influences the properties of aeronautical nanocomposites including mechanical, thermal, non-flammability, and other physical aspects. Then, the combined effect of carbonaceous nanofillers and carbon fibers in aerospace materials have been debated. Moreover, this book points to the potential of aeronautical nanocomposites towards lightning strike, radiation shielding, anti-corrosion, electronic/optical features, thermal management, antistatic application, self-healing aptitude, and green nanocomposites. Modeling of mechanical and essential properties of aerospace nanocomposites is also discussed. Challenges and future forecasts of polymer/carbonaceous nanofiller nanocomposites have also been included for upgrading the properties for aerospace relevance. Unquestionably, the researchers do not have set entrance to such literature content before, in such a well-assembled and all-inclusive form. Future advancements in the field of aerospace related polymer/carbonaceous nanocomposites are undeniably difficult for the scientist without getting prior knowledge of the relevant space nanomaterials. Thus, this book will definitely contribute to the state-of-the-art knowledge in the field of aerospace nanocomposites.
Thermal And Electrical Properties Of Graphene Based Polymer Nanocomposite Foams
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Author : SeyedMahdi Hamidinejad
language : en
Publisher:
Release Date : 2019
Thermal And Electrical Properties Of Graphene Based Polymer Nanocomposite Foams written by SeyedMahdi Hamidinejad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Recently, multifunctional polymer-graphene nanoplatelet (GnP) composites have demonstrated great promise as next-generation materials for energy management and storage, electromagnetic interference (EMI) shielding and heat dissipation components in electronic industries. However, the practical underpinning needed to economically manufacture graphene-based polymer composites is missing. Therefore, this dissertation aims to demonstrate how some of the challenges for efficient manufacturing of functional polymer composites, can be strategically tackled by using supercritical fluid (SCF)-treatment and physical foaming technologies. In this PhD research, an industrial-scale technique for in situ exfoliation and dispersion of GnP in polymer matrices was developed and invented. This thesis also developed an in-depth understanding of the effects of cellular structures, GnPs' orientation, arrangement, and exfoliation on the thermal/electrical conductivity, percolation threshold, dielectric performance, and EMI shielding effectiveness of the graphene-based polymer composites. In particular, it was demonstrated how SCF−treatment and physical foaming can significantly enhance thermal conductivity of polymer-GnP composites. The SCF-treatment and physical foaming exfoliated the GnPs in situ and microscopically tailored the nanocomposites' structure to enhance the thermal conductivity. The research findings in this thesis have also demonstrated that the introduction of foaming and microcellular structure can substantially increase the electrical conductivity, EMI shielding effectiveness and can decrease the percolation threshold of the polymer-GnP composites. This research also presented a facile technique for manufacturing a new class of ultralight polymer-GnP composite foams with excellent dielectric performance. The generation of a microcellular structure provided a unique parallel-plate arrangement of GnPs around the cell walls. This significantly increased the real permittivity and decreased the dielectric loss. This dissertation developed a fundamental understanding of structure-property relationships and new routes to microscopically engineer the structures and properties of graphene-based polymer composites for various application such as heat management (heat sink materials), EMI shielding, energy storage and capacitors (dielectric materials).
Shape Memory Polymer Derived Nanocomposites
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Author : Ayesha Kausar
language : en
Publisher: Elsevier
Release Date : 2024-01-22
Shape Memory Polymer Derived Nanocomposites written by Ayesha Kausar and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-01-22 with Technology & Engineering categories.
Shape Memory Polymer derived Nanocomposites: Features to Cutting-Edge Advancements summarizes the up-to-date of fundamentals and applications of the shape memory polymer derived nanocomposites. Design and fabrication of shape memory polymeric nanocomposites have gained significant importance in the field of up-to-date nano/materials science and technology. In recent times, the shape memory polymers and nanocomposites have attracted considerable academic and industrial research interest. This feature book will present a state-of-the-art assessment on the versatile shape memory materials. The flexibility, durability, heat stability, shape deformability, and shape memory features of these polymers have shown dramatic improvements with the nanofiller addition. Appropriate choice of the stimuli-responsive polymer, nanofiller type and content, and fabrication strategies may lead to enhanced physicochemical features and stimuli-responsive performance. Several successful stimuli-responsive effects have been achieved in the shape memory nanocomposites such as thermo-responsive, electro-active, photo-active, water/moisture-responsive, pH-sensitive, etc. Consequently, the shape memory polymer based nanocomposites have found applications in high-tech devices and applications. This book initially offers a futuristic knowledge regarding indispensable features of the shape memory polymeric nanocomposites. Afterwards, the essential categories of the stimuli-responsive polymer-based nanocomposites have been discussed in terms of recent scientific literature. Subsequent sections of this book are dedicated to the potential of shape memory polymer-based nanocomposite in various technical fields. Significant application areas have been identified as foam materials, aerospace, radiation shielding, sensor, actuator, supercapacitor, electronics and biomedical relevance. The book chapters also point towards the predictable challenges and future opportunities in the field of shape memory nanocomposites. Provides the essentials of shape memory polymeric nanocomposites Includes important categories of shape memory nanocomposites Presents current technological applications of shape memory polymers and derived nanocomposite in sponges, aerospace, EMI shielding, ionizing radiation shielding, sensors, actuator, supercapacitor, electronics, and biomedical fields