Multifunctional Polymer Nanocomposites Through The Addition Of Graphene Nanoplatelets And Their Uses In Automotive Fuel Tanks
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Multifunctional Polymer Nanocomposites Through The Addition Of Graphene Nanoplatelets And Their Uses In Automotive Fuel Tanks
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Author : Keith T. Honaker
language : en
Publisher:
Release Date : 2017
Multifunctional Polymer Nanocomposites Through The Addition Of Graphene Nanoplatelets And Their Uses In Automotive Fuel Tanks written by Keith T. Honaker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Electronic dissertations categories.
Graphene Nanoplatelet Based Polymer Composites And Their Multiple Applications
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Author : Zeyang Yu
language : en
Publisher:
Release Date : 2019
Graphene Nanoplatelet Based Polymer Composites And Their Multiple Applications written by Zeyang Yu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Electronic dissertations categories.
Graphene nanoplatelets (GnP) consist of a few layers of graphene with thicknesses in the nanometer range. GnP is considered a multifunctional nanomaterial since it possesses excellent mechanical, electrical and thermal properties and as a result of its 2D structure, it offers the possibility of improving the barrier properties of a polymer matrix by reducing the permeability of small molecules through the polymer matrix. The aromatic planar basal surface of GnP consisting of carbon in the sp2 state is inert and the carbon atoms at the GnP edges are the few sites at which functional groups can be added to GnP. When GnP is treated with strong acids, graphene oxide (GO) is formed. The carbon atoms are changed from sp2 to sp3 bonding and the basal plane surface has a large population of oxygen groups which change the surface from hydrophobic to hydrophilic. The GO has the potential to act as a coupling agent to improve the interfacial interaction between GnP and the polymer matrix. Besides adding GnP to a polymer to form a multifunctional polymer composite, the GnP can be fabricated into thin 'paper' electrodes by vacuum filtration of a GnP suspension. This GnP thin film has in-plane electrical conductivity similar to metals and when coated with an insulating polymer layer can function as an electrode in an electrostatic actuator. This dissertation investigates the interaction of GnP with polymer matrices, modifying the surface chemistry to improve the interfacial interaction between filler and matrix, and exploring new applications for multifunctional GnP-polymer composites.The dispersion of GnP into a thermoplastic polyurethane (TPU) through melt blending has been investigated. The dispersion and alignment of GnP plays a key role in attaining the multifunctional properties of the composite. 25wt% GnP was incorporated into TPU through an extrusion process, wherein the dispersion and alignment of GnP was controlled by the film extrusion speed. The effect of three film extrusion speeds of 2, 3 and 5 ft/min on the dispersion and alignment of GnP were investigated. The optimum extrusion conditions gave 350% improvement in through-plane thermal conductivity; 75% reduction in oxygen permeability; and the tensile modulus and strength increased by 950% and 470% respectively.Graphene oxide (GO) was selected as a possible modifier to improve the interaction between GnP and an epoxy matrix. The rich oxygen based functional groups on the GO surface could function as reaction sites for chemical bonding directly or sites for adding other chemical groups such as diamines or epoxy. GO and GnP were sonicated together in a water phase forming a GO-GnP complex, followed by treatment with two different diamines ( (p-phenylenediamine (PPDA) and Jeffamine D2000) with different chain lengths. The functionalized GO-GnP complex was added to the GnP-epoxy composite at a 0.86wt% loading. An increase in tensile modulus of ~60% was measured as a result.The GnP was also investigated as a thin 'paper' electrode fabricated through vacuum filtration of a GnP suspension. GnP electrodes were fabricated from the compressed GnP paper and then coated on both sides with a thin epoxy layer. An electrostatic actuator was constructed from two parallel-aligned composite GnP paper electrodes fixed at the anode of the high power supply and with the cathode connected to the ground. The two composite electrodes would separate at the free end when a voltage was applied. The actuating performance was shown to be improved based on either increasing the surface area of electrode or enhancing the relative permittivity of the insulating layer between two electrodes.
Multifunctional Polymeric Nanocomposites Fabricated By Incorporation Of Exfoliated Graphene Nanoplatelets And Their Application In Bipolar Plates For Polymer Electrolyte Membrane Fuel Cells
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Author : Xian Jiang
language : en
Publisher:
Release Date : 2012
Multifunctional Polymeric Nanocomposites Fabricated By Incorporation Of Exfoliated Graphene Nanoplatelets And Their Application In Bipolar Plates For Polymer Electrolyte Membrane Fuel Cells written by Xian Jiang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Electronic dissertations categories.
Polymer Nanocomposites Containing Graphene
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Author : Mostafizur Rahaman
language : en
Publisher: Woodhead Publishing
Release Date : 2021-08-22
Polymer Nanocomposites Containing Graphene written by Mostafizur Rahaman and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-22 with Technology & Engineering categories.
Polymer Nanocomposites Containing Graphene: Preparation, Properties and Applications provides detailed up-to-date information on the characterization, synthesis, processing, properties and application of these materials. Key topics that are covered in the book include: the methods of synthesis and preparation of graphene as well as different processes and methods of functionalization and modification of graphene for improving composite properties. The preparation techniques focus on which method is advantageous for getting improvements in properties along with their drawbacks. The structure and property relationships are also discussed in detail. The issues related to graphene dispersion in polymer matrices is also addressed as well as the use of graphene as reinforcement in thermoset resins. The different properties of the composites like mechanical, electrical, dielectric, thermal, rheological, morphology, spectroscopy, electronic, optical, and toxicity are reviewed from the geometrical and functional point of view. Applications cover electrical and electronic fields, flame and fire retardancy, structural, sensing and catalysis, membrane, in fuel cell and solar energy, hydrogen production, aerospace engineering, packaging, and biomedical/bioengineering fields. Up-to-date patents on graphene-polymer nanocomposites are also covered. Those working in graphene-based materials will benefit from the detailed knowledge presented in this book on graphene synthesis, composite preparation methods, and the related problems associated with them. The book will enable researchers to select the appropriate composite as per their respective field of application. Presents novel approaches for the preparation of graphene, its modification and nanocomposites with enhanced properties for state-of-the-art applications Special attention is given to how graphene is synthesized through different routes, their functionality, dispersion related matters and structural aspects controlling the composite properties for various applications All synthesis methodology and functionalization procedure for graphene is discussed
Manufacturing And Characterisation Of Multifunctional Polymer
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Author : Jahnavee Upadhyay
language : en
Publisher:
Release Date : 2012
Manufacturing And Characterisation Of Multifunctional Polymer written by Jahnavee Upadhyay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Nanocomposites (Materials) categories.
Composites with polymer matrices and nano-sized exfoliated fillers demonstrate significant enhancement in mechanical and functional properties over those of monolithic polymers at extremely low filler loadings. From the variety of nano-fillers utilised by researchers to develop commercially viable nanocomposites, carbon based nano-fillers are prominently used to render electrical conductivity in addition to mechanical strength. Amongst these, graphene oxide (GO) is electrically insulating contrary to the rest of carbon-based fillers, and hence not much investigated as a nano-filler so far. However, chemical and/or thermal reduction of GO can restore the electrical conductivity. This transitional behaviour makes GO a promising nano-filler for electronic applications. Besides, the thermal stability and mechanical strength of GO are comparable to graphene at temperate conditions. This research work is aimed at preparation of multifunctional polymer-GO nanocomposite thin films. The multi-layered films are constructed as a sandwich of plain polymer facing sheets supporting an electrospun polymer-GO nano-fibre core. The material formulation is divided into two parts, viz., development of a simple and less hazardous process for synthesizing conductive GO nano-fillers, and manufacturing of polymer-GO nano-fibre mats with electrospinning. The characterisation techniques employed to assess the structure and morphology of synthesized GO include X-ray diffractometry, Fourier transform infrared spectroscopy and scanning electron microscopy and the results confirm the effectiveness of the developed GO synthesis process. Additionally, the partial chemical reduction lead to a severe drop in electrical resistivity of GO sheets, and the observed average resistivity values are amongst the lowest reported till date. An orthogonal experimental design as per Taguchi method was devised to analyse the process parameter effects on the average resistivity value of GO sheets. Poly(methyl methacrylate) was selected as the polymer matrix for this work and plymer-GO nano-fibre mats were generated with electrospinning under controlled environmental conditions, to produce well-dispersed nano-fibres with uniform diameter. Vacuum forming was used to manufacture the sandwich films with electrospun cores. Additionally, electrically conducting, monolayer polymer-GO nanocomposite films were prepared through solution casting. The nanocomposite sandwich films demonstrate very high gas barrier with permeation values of nearly zero, measured during oxygen permeation testing. Modelling of gas barrier property is accomplished with analytical and finite element based numerical modelling tools. The observed high gas barrier is attributed to multi-layered structure, fibrous core and presence of impermeable GO fillers in the nano-fibres. Based on the experimental results, these films are found highly suitable for applications in food and beverage packaging and chemical processing plants. Analytical modelling of electromagnetic interference shielding capability of the solution cast polymer-GO films was conducted. The shielding effectiveness values predicted by the models are positive, but significantly lower than the commercial requirements. However, the theoretical cases for nanocomposite films with moderate improvement in electrical conductivity and increased film thickness yield commercially required EMI SE values, thus confirming the potential of these films as EMI shields This thesis thus reports a comprehensive work covering the synthesis of GO nano-fillers, manufacturing of sandwich thin films with electrospun polymer-GO nano-fibre cores and the experimental characterisation of the fillers and nanocomposite specimens.
Graphene To Polymer Graphene Nanocomposites
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Author : Ayesha Kausar
language : en
Publisher: Elsevier
Release Date : 2021-09-29
Graphene To Polymer Graphene 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 2021-09-29 with Science categories.
Graphene to Polymer/Graphene Nanocomposites: Emerging Research and Opportunities brings together the latest advances and cutting-edge methods in polymer/graphene nanocomposites that offer attractive properties and features, leading to a broad range of valuable applications. The initial chapters of this book explain preparation, properties, modification, and applications of graphene and graphene-based multifunctional polymeric nanocomposites. Later, the state-of-the-art potential of polymer/graphene nanocomposites for hierarchical nanofoams, graphene quantum dots, graphene nanoplatelets, graphene nanoribbons, etc., has been elucidated. The subsequent chapters focus on specific innovations and applications including stimuli-responsive graphene-based materials, anticorrosive coatings, applications in electronics and energy devices, gas separation and filtration membrane applications, aerospace applications, and biomedical applications. Throughout the book, challenges, and future opportunities in the field of polymer/graphene nanocomposites are discussed and analyzed. This is an important resource for researchers, scientists, and students/academics working with graphene and across the fields of polymer composites, nanomaterials, polymer science, chemistry, chemical engineering, biomedical engineering, materials science, and engineering, as well those in an industrial setting who are interested in graphene or innovative materials. Explores the fundamentals, preparation, properties, processing, and applications of graphene and multifunctional polymer-graphene nanocomposites. Focuses on the state of the art including topics such as nano-foam architectures, graphene quantum dots, graphene nanoplatelets, graphene nanoribbons, and other graphene nanostructures. Provides advanced applications including shape memory materials, anticorrosion materials, electronics and energy devices, gas separation and filtration membranes, aerospace relevance, and biomedical applications.
Graphene Nanoplatelets
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Author : Silvia González Prolongo
language : en
Publisher: MDPI
Release Date : 2020-04-24
Graphene Nanoplatelets written by Silvia González Prolongo and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-24 with Technology & Engineering categories.
Graphene nanoplatelets (GNPs) have attracted considerable interest due to their exceptional mechanical, electrical, and thermal properties, among others. This book provides a deep review of some aspects related to the characterization of GNPs and their applications as nanoreinforcements for different types of matrices such as polymeric- or cement-based matrices. In this book, the reader will find how these nanoparticles could be used for several industrial applications such as energy production and storage or effective barrier coatings, providing a wide overview of future progress in this topic
Multifunctional Polymer Nanocomposites
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Author : Jinsong Leng
language : en
Publisher: CRC Press
Release Date : 2010-12-21
Multifunctional Polymer Nanocomposites written by Jinsong Leng and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-12-21 with Technology & Engineering categories.
The novel properties of multifunctional polymer nanocomposites make them useful for a broad range of applications in fields as diverse as space exploration, bioengineering, car manufacturing, and organic solar cell development, just to name a few. Presenting an overview of polymer nanocomposites, how they compare with traditional composites, and th
Graphene Polymer Composites
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Author : Fernão D. Magalhães
language : en
Publisher: MDPI
Release Date : 2018-09-13
Graphene Polymer Composites written by Fernão D. Magalhães and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-13 with Electronic books categories.
This book is a printed edition of the Special Issue "Graphene-Polymer Composites" that was published in Polymers
Polymer Nanocomposites
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Author : Aravind Dasari
language : en
Publisher: Springer
Release Date : 2016-06-28
Polymer Nanocomposites written by Aravind Dasari and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-06-28 with Technology & Engineering categories.
This highlights ongoing research efforts on different aspects of polymer nanocomposites and explores their potentials to exhibit multi-functional properties. In this context, it addresses both fundamental and advanced concepts, while delineating the parameters and mechanisms responsible for these potentials. Aspects considered include embrittlement/toughness; wear/scratch behaviour; thermal stability and flame retardancy; barrier, electrical and thermal conductivity; and optical and magnetic properties. Further, the book was written as a coherent unit rather than a collection of chapters on different topics. As such, the results, analyses and discussions presented herein provide a guide for the development of a new class of multi-functional nanocomposites. Offering an invaluable resource for materials researchers and postgraduate students in the polymer composites field, they will also greatly benefit materials