Dielectric Polymer Nanocomposites
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Polymer Nanocomposites For Dielectrics
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Author : Katie Zhong
language : en
Publisher: CRC Press
Release Date : 2017-01-12
Polymer Nanocomposites For Dielectrics written by Katie Zhong and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-12 with Science categories.
Polymers have been used as dielectric materials owing to their light weight, great flexibility, and processability as well as high insulation properties. To enhance their performance for various desired dielectric applications, fabrication of polymeric nanocomposites is believed to be one of the most effective approaches. By controlling the nanomaterial dispersion and interfacial structures with the polymer matrices in nanocomposites, dielectric properties can be tailored for specific applications. This book reviews representative polymer nanocomposite systems, focusing on the roles of nanodispersion, interfacial structures, and properties of polymer matrix materials in the dielectric properties and energy storage performance. The book reviews various dielectric relaxation models applicable to the analysis of polymer nanocomposites. It compiles the recent progress in new dielectric polymer nanocomposites based on biomaterials and hybrid nanomaterial systems for advanced dielectric applications.
Dielectric Polymer Nanocomposites
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Author : J. Keith Nelson
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-12-17
Dielectric Polymer Nanocomposites written by J. Keith Nelson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-12-17 with Technology & Engineering categories.
Dielectric Polymer Nanocomposites provides the first in-depth discussion of nano-dielectrics, an emerging and fast moving topic in electrical insulation. The text begins with an overview of the background, principles and promise of nanodielectrics, followed by a discussion of the processing of nanocomposites and then proceeds with special considerations of clay based processes, mechanical, thermal and electric properties and surface properties as well as erosion resistance. Carbon nanotubes are discussed as a means of creation of non linear conductivity, the text concludes with a industrial applications perspective.
Polymer Dielectrics
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Author : Boxue Du
language : en
Publisher: BoD – Books on Demand
Release Date : 2017-05-11
Polymer Dielectrics written by Boxue Du 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 2017-05-11 with Technology & Engineering categories.
The book gives the reader an overview on electrical properties and applications such as converter transformer, transistor, and energy storage. Besides, this book also presents some recent researches on typical polymer material such as silicon rubber and LDPE, which may provide some clues of advanced polymer properties for both engineers and researches. The author has been a professor at the Department of Electrical Engineering, School of Electrical Engineering and Automation, Tianjin University, China, since 2002. He has been active in polymer insulation research since the 1990s. He is a member of IEEJ, senior member of CSEE, member at several WG in CIGRE, and associate editor of the IEEE Transactions on Dielectrics and Electrical Insulation.
Tailoring Of Nanocomposite Dielectrics
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Author : Toshikatsu Tanaka
language : en
Publisher: CRC Press
Release Date : 2016-11-03
Tailoring Of Nanocomposite Dielectrics written by Toshikatsu Tanaka and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-03 with Science categories.
This book illustrates interfacial properties, preparation, characterization, devices, and applications from the standpoint of nano-interfacial tailoring. Since the primary focus of the book is on the use of nanocomposite dielectrics in electrical applications, chapters are devoted to directly relevant topics, such as surface and bulk breakdown processes. However, the mechanisms that underpin such behavior are not unique. Therefore, the book also addresses related topics that range from the chemistry of polymer and nanocomposite degradation to the simulation of charge transport dynamics in disordered materials, thereby presenting a multi- and interdisciplinary approach to the area. It will serve as a practical handbook or graduate textbook and is supplemented by ample number of illustrations, case studies, practical examples, and historical perspectives.
Dispersion Strategies And Role Of Interfacial Phenomena In Dielectric Polymer Nanocomposites
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Author : Payam Khodaparast
language : en
Publisher:
Release Date : 2014
Dispersion Strategies And Role Of Interfacial Phenomena In Dielectric Polymer Nanocomposites written by Payam Khodaparast and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Owing to unique characteristics of nanoparticles such as high surface to volume ratio, it is postulated that nanoparticle-modified polymers exhibit properties beyond those predicted by effective media theories. In the case of dielectric nanoparticles in a polymer, it is expected that dielectric properties of the nanocomposite are dominated by the expansive interface rather than anticipated by the inherent properties of individual components. An in-depth review of dielectric polymer nanocomposites shows conflicting trends where addition of nano-sized particles resulted in increase or decrease in dielectric properties. This contradictory behavior could mainly stem from 1- the state of dispersion of nanoparticles and 2-The unique nature of interface based on the particle-polymer system. The hypothesis of the proposed research is that the role of the interfacial region is not only influenced by its expansive nature but is also governed by their interaction at nanoscale regime. In order to achieve a high internal surface area, the first important challenge to address is controlling the state of dispersion and disaggregation of nanoparticles. Therefore the first goal of this research is studying the effectiveness of different processing methods in achieving uniform nanoscale dispersion in dielectric polymer nanocomposites. Silane functionalization of titania nanoparticles is investigated as one possible solution of better dispersion of titania in PVDF polymer where two coupling agents namely, aminopropyltriethoxy silane called as APS, and Nonafluorohexyltriethoxysilane called as FHES, are studied. FHES is shown to be more effective in reducing the average aggregate size of titania nanoparticles in PVDF matrix to below 100nm, whereas the average aggregate size in untreated and APS-functionalized TiO2/PVDF nanocomposite was approximately one to two orders of magnitude higher than that. Dielectric permittivity of FHES-functionalized TiO2/PVDF nanocomposite, showed improvements over untreated and APS-functionalized TiO2/PVDF nanocomposite at weight fractions up to 10wt% (5vol%), as a result of higher interfacial area and resulting polarization at interface. However, DC dielectric breakdown and maximum achievable stored energy density did not show any dependence on average aggregate size or the type of silane surface treatments; both DC dielectric breakdown and maximum achievable stored energy density showed a similar decreasing trend as the titania weight fraction increased for all three cases. Besides silane functionalization of titania, in-situ and ex-situ sol-gel synthesis of titania were also studied as another effective method to achieve nanoscale dispersion in titania/PVDF nanocomposites. In- situ sol-gel technique resulted in uniform nanodispersion of titania in PVDF and 30% higher dielectric permittivity at 1kHz compared to commercial titania/PVDF composite with the same wt% of titania phase. However, high dielectric loss and lower DC dielectric breakdown were also observed in the in-situ sample, due to ionic impurities and trapped residues of the sol-gel process, which is a disadvantage of in-situ technique. On the other hand, ex-situ technique showed uniform dispersion of titania aggregates in the range of 100nm homogeneously dispersed in PVDF matrix. Dielectric permittivity and DC dielectric breakdown both improved in case of ex-situ; leading to 20% improvement in storage energy density of ex-situ titania/PVDF compared to pure PVDF sample; therefore this processing technique is a promising one. As to the second goal of this research, understanding the role of interfacial phenomena on final dielectric behavior of polymer nanocomposites, other metal oxides, namely, alumina, silica and magnesia are considered. In addition to varying contrast in dielectric permittivity with PVDF, these metal oxide particles also bring dissimilar surface chemistries in terms of type and concentration of physisorbed and chemisorbed water on their surfaces. Alumina nanoparticles in particular showed relatively higher amount of physisorbed and chemisorbed water on the surface; it also exhibited nanoscale dispersion in PVDF. Dielectric permittivity of alumina/PVDF nanocomposites, despite similar dielectric constant values for both phases, showed higher improvements compared to the other particles. Dehydrated alumina/PVDF nanocomposites also showed similar increase in dielectric permittivity. Therefore, a second important conclusion of this work is that improvements in dielectric permittivity in alumina/PVDF is mostly a result of dipolar interactions of chemisorbed water in form of hydroxyl group on the surface of alumina and C-F dipoles in PVDF chain at the interface. The combination of nanoscale dispersion in alumina/PVDF and dipolar interaction with PVDF verifies that interfacial phenomena could be significant enough in nanocomposites to lead to improvements in final dielectric permittivity of nanocomposite systems and a step forward to resolving the role of interfacial phenomena in dielectric behavior of polymer nanocomposites based on type and surface chemistry of nanoparticles.
Physical Properties And Applications Of Polymer Nanocomposites
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Author : S C Tjong
language : en
Publisher: Elsevier
Release Date : 2010-10-29
Physical Properties And Applications Of Polymer Nanocomposites written by S C Tjong and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-10-29 with Technology & Engineering categories.
Polymer nanocomposites are polymer matrices reinforced with nano-scale fillers. This new class of composite materials has shown improved mechanical and physical properties. The latter include enhanced optical, electrical and dielectric properties. This important book begins by examining the characteristics of the main types of polymer nanocomposites, then reviews their diverse applications. Part one focuses on polymer/nanoparticle composites, their synthesis, optical properties and electrical conductivity. Part two describes the electrical, dielectric and thermal behaviour of polymer/nanoplatelet composites, whilst polymer/nanotube composites are the subject of Part three. The processing and industrial applications of these nanocomposite materials are discussed in Part four, including uses in fuel cells, bioimaging and sensors as well as the manufacture and applications of electrospun polymer nanocomposite fibers, nanostructured transition metal oxides, clay nanofiller/epoxy nanocomposites, hybrid epoxy-silica-rubber nanocomposites and other rubber-based nanocomposites. Polymer nanocomposites: Physical properties and applications is a valuable reference tool for both the research community and industry professionals wanting to learn about the these materials and their applications in such areas as fuel cell, sensor and biomedical technology. Examines the characteristics of the main types of polymer nanocomposites and reviews their diverse applications Comprehensively assesses polymer/nanoparticle composites exploring experimental techniques and data associated with the conductivity and dielectric characterization A specific section on polymer/nanotube composites features electrical and dielectric behaviour of polymer/carbon nanotube composites
Dielectric Polymer Materials For High Density Energy Storage
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Author : Zhi-Min Dang
language : en
Publisher: William Andrew
Release Date : 2018-06-13
Dielectric Polymer Materials For High Density Energy Storage written by Zhi-Min Dang and has been published by William Andrew this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-13 with Technology & Engineering categories.
Dielectric Polymer Materials for High-Density Energy Storage begins by introducing the fundamentals and basic theories on the dielectric behavior of material. It then discusses key issues on the design and preparation of dielectric polymer materials with strong energy storage properties, including their characterization, properties and manipulation. The latest methods, techniques and applications are explained in detail regarding this rapidly developing area. The book will support the work of academic researchers and graduate students, as well as engineers and materials scientists working in industrial research and development. In addition, it will be highly valuable to those directly involved in the fabrication of capacitors in industry, and to researchers across the areas of materials science, polymer science, materials chemistry, and nanomaterials. Focuses on how to design and prepare dielectric polymer materials with strong energy storage properties Includes new techniques for adjusting the properties of dielectric polymer materials Presents a thorough review of the state-of-the-art in the field of dielectric polymer materials, providing valuable insights into potential avenues of development
Polymer Nanocomposites
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Author : Xingyi Huang
language : en
Publisher: Springer
Release Date : 2016-05-06
Polymer Nanocomposites written by Xingyi Huang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-06 with Technology & Engineering categories.
This book focuses on the fundamental principles and recent progress in the field of electrical and thermal properties of polymer nanocomposites. The physical and chemical natures determining the electrical and thermal properties of polymer nanocomposites are discussed in detail. The authors describe the range of traditional and emerging polymer nanocomposites from nanoparticle and polymer composites to novel nanostructure based polymer nanocomposites. They include novel properties and potential applications, such as high-k, low-k, high thermal conductivity, antistatic, high voltage insulation, electric stress control, and thermal energy conversion among others.
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
Optimization Of Polymer Based Nanocomposites For High Energy Density Applications
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Author : Amira Barhoumi Ep Meddeb
language : en
Publisher:
Release Date : 2012
Optimization Of Polymer Based Nanocomposites For High Energy Density Applications written by Amira Barhoumi Ep Meddeb 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.
Monolithic materials are not meeting the increasing demand for flexible, lightweight and compact high energy density dielectrics. This limitation in performance is due to the trade-off between dielectric constant and dielectric breakdown. Insulating polymers are of interest owing to their high inherent electrical resistance, low dielectric loss, flexibility, light weight, and low cost; however, capacitors produced with dielectric polymers are limited to an energy density of ~1-2 J/cc. Polymer nanocomposites, i.e., high dielectric particles embedded into a high dielectric breakdown polymer, are promising candidates to overcome the limitations of monolithic materials for energy storage applications. The main objective of this dissertation is to simultaneously increase the dielectric permittivity and dielectric breakdown without increasing the loss, resulting in a significant enhancement in the energy density over the unmodified polymer. The key is maintaining a low volume content to ensure a high inter-particle distance, effectively minimizing the effect of local field on the composite's dielectric breakdown. The first step is studying the particle size and aspect ratio effects on the dielectric properties to ensure a judicious choice in order to obtain the highest enhancement. The best results, as a combination of dielectric constant, loss and dielectric breakdown, were with the particles with the highest aspect ratio. Further improvement in the dielectric behavior is observed when the nanoparticles surface is chemically tailored to tune transport properties. The particles treatment leads to better dispersion, planar distribution and stronger interaction with the polymer matrix. The planar distribution of the high aspect ratio particles is essential to limit the enhancement of local fields, where minimum local fields result in higher dielectric breakdown in the composite. The most significant improvement in the dielectric properties is achieved with chemically-treated nano TiO2 with an aspect ratio of 14 at a low 4.6 vol% loading, where the energy density increased by 500% compared to pure PVDF. At this loading, simultaneous enhancement in the dielectric constant and dielectric breakdown occurs while the dielectric loss remains in the same range as that of the pristine polymer.