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ABSTRACT: Foams from these nanocomposites exhibit single modal cell size distribution and remarkably increased cell density and reduced cell size. An increase in cell density of ~70 times and reduction of cell size of ~80% was observed in nanocomposite foam with 1% CNTs.
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.
ABSTRACT: Nanomaterials have attracted a great deal of research efforts due to the potential unprecedented properties these materials may provide. Carbon nanotubes (CNTs) are of particular interest because of their exceptional mechanical, thermal and electrical properties. The purpose of this research is to develop poly (methyl methacrylate) (PMMA) carbon nanotubes (CNTs) nanocomposite foams with improved energy dissipation capabilities (toughness). PMMA CNTs nanocomposites were first synthesized by anti-solvent precipitation process (ASP). Nanocomposites with different CNTs concentrations were prepared. The dispersion of the CNTs in the polymer matrix was observed by scanning electron microscopy (SEM). Nanocomposite foams were prepared by a batch process using carbon dioxide as the foaming agent. The foaming was conducted from the retrograde phase that enabled high CO2 solubility and facilitated formation of foams of high bubble density and small bubble size. The effects of foaming temperature, foaming time and CNTs concentration on the foam expansion ratio was investigated. The morphology of the prepared foams was studied by SEM. The compressive properties of the foams were measured and toughness determined. The nanocomposite foams with 0.5% CNT show improvement in energy absorbing capabilities. Upon further increasing CNT concentration, the capability decreases. Further analysis revealed that this was due to the non-uniform foam morphology in those nanocomposite foams. This in turn resulted in from the mixed nucleation mechanisms because of the insufficient CNT dispersion when foamed from the retrograde phase. Enhancement of CNT dispersion in the matrix is needed in order to improve the uniformity of the foams and realize the potential of these materials.
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 nanost
This book presents the selected papers from the 19th Asian Workshop in Polymer Processing (AWPP 2022) highlighting the latest research breakthroughs in the field of polymeric materials and processing technologies. The topics of the conference provides an exclusive forum for intellectually stimulating and engaging interactions among academicians and industrialists to share their recent scientific breakthroughs and emerging trends in polymer processing technologies and their contributions towards environmental sustainability. Its content appeals to the researchers, academics, industry practitioners working in the field of green sustainable polymers.
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.
Keywords: multi-wall carbon nanotube, polypropylene, nanocomposite, mechanical properties, morphology.
Design and Applications of Nanostructured Polymer Blend and Nanocomposite Systems offers readers an intelligent, thorough introduction to the design and applications of this new generation of designer polymers with customized properties. The book assembles and covers, in a unified way, the state-of-the-art developments of this less explored type of material. With a focus on nanostructured polymer blends, the book discusses the science of nanostructure formation and the potential performance benefits of nanostructured polymer blends and composites for applications across many sectors: electronics, coatings, adhesives, energy (photovoltaics), aerospace, automotive, and medical devices (biocompatible polymers). The book also describes the design, morphology, and structure of nanostructured polymer composites and blends to achieve specific properties. Covers all important information for designing and selecting the right nanostructured polymer system Provides specialized knowledge on self-repairing, nanofibre and nanostructured multiphase materials, as well as evaluation and testing of nanostructured polymer systems Serves as a reference guide for development of new products in industries ranging from electronics, coatings, and energy, to transport and medical applications Describes the design, morphology, and structure of nanostructured polymer composites and blends to achieve specific properties
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.
Functionalized Graphene Nanocomposites and Their Derivatives: Synthesis, Processing and Applications explains how the functionalization technique is used to create graphene nanocomposites, also exploring its current uses in industrial applications. Graphene-based nanocomposites are one of the major advancements in polymer-based materials, thus the synthesis, nanoscale dimensions, high aspect ratio, mechanical, electrical and thermal properties of graphene and its derivative have all been major areas of research in the last decade. This important reference covers these updates and is a critical book for those working in the fields of materials processing and characterization. Explains how graphene is functionalized and used in the fabrication of nanocomposites for a range of applications Explores why the properties of functionalized graphene make it such a useful, versatile material Describes, in detail, the functionalization process for utilization in graphene