Functional Polymer Film Roll To Roll Manufacturing By Field Assisted Alignment Of Nanoparticles Phases In Thickness Z Direction

Roll-to-roll nanomanufacturing is the next generation processing technique with advantages of high throughput and low cost, beneficial for manufacturing functional materials for flexible electrons, medical device and filtration applications. Roll-to-roll processing combining external electric field to organize nanoparticles in polymer films provides a unique processing path fabricate the nanocomposites with directionally ordered structures which exhibit significantly enhanced properties in field direction.The first part of this study presents a simple, low cost and commercially viable method to manufacture multifunctional nanocomposites with directionally ordered structures. The manufacturing of poly(dimethylsiloxane) (PDMS) film with "Z" aligned graphite nanoparticles by application of electric field is achieved continuously on a roll-to-roll processing line. The "Z" aligned nanocomposite films exhibit significantly enhanced dielectric permittivity, electrical and thermal conductivity through the thickness direction. The second study develops a novel roll-to-roll processing method for "Z" alignment of barium titanate (BaTiO3) nanoparticles in polystyrene (PS)/toluene solution systems, which broadens the choice of polymers to use as matrix to manufacture functional films with anisotropic structure. This is accomplished by applying electric field to a two-layer solution film cast on a carrier: the top layer is a sacrificial layer contacting the electrode and the bottom one is the composite layer. The "Z" aligned nanocomposite films show substantially increased dielectric permittivity for enhancing the performance of capacitors.The third study proposes a three-layer wound dressing with "Z" aligned superabsorbent particles by using the processing method developed in previous study. This resulting wound dressing preferentially expands in thickness direction after absorbing water, thus reducing the lateral stress between the dressing and wound. The aligned wound dressings could achieve up to 33% smaller lateral expansion than the film with random particles. Compared to irregular shape particles, rod-like particles with higher aspect ratio are more effective to improve anisotropic swelling and reduce lateral expansion.The final study demonstrates the formation of dispersed and bicontinuous morphology of PS and PMMA blends with the interface coated by silica nanoparticles modified with PS-r-PMMA copolymer. The effect of the solvent evaporation rate, blend compositions, particle loading and size on the resulting morphology is systematically investigated. The vertical alignment of PMMA phase with dense nanoparticle coated interface by the application of electric field is investigated. The effect of dielectric constant of nanoparticles on their reorganization at the interface under electric field demonstrated.

Very thin film materials have emerged as a highly interesting and useful quasi 2D-state functionality. They have given rise to numerous applications ranging from protective and smart coatings to electronics, sensors and display technology as well as serving biological, analytical and medical purposes. The tailoring of polymer film properties and functions has become a major research field. As opposed to the traditional treatise on polymer and resin-based coatings, this one-stop reference is the first to give readers a comprehensive view of the latest macromolecular and supramolecular film-based nanotechnology. Bringing together all the important facets and state-of-the-art research, the two well-structured volumes cover film assembly and depostion, functionality and patterning, and analysis and characterization. The result is an in-depth understanding of the phenomena, ordering, scale effects, fabrication, and analysis of polymer ultrathin films. This book will be a valuable addition for Materials Scientists, Polymer Chemists, Surface Scientists, Bioengineers, Coatings Specialists, Chemical Engineers, and Scientists working in this important research field and industry.

A single-volume resource featuring state-of-the art reviews of key elements of the roll-to-roll manufacturing processing methodology Roll-to-roll (R2R) manufacturing is an important manufacturing technology platform used extensively for mass-producing a host of film-type products in several traditional industries such as printing, silver-halide photography, and paper. Over the last two decades, some of the methodologies and know-how of R2R manufacturing have been extended and adapted in many new technology areas, including microelectronics, display, photovoltaics, and microfluidics. This comprehensive book presents the state-of-the-art unit operations of the R2R manufacturing technology, providing a practical resource for scientists, engineers, and practitioners not familiar with the fundamentals of R2R technology. Roll-to-Roll Manufacturing: Process Elements and Recent Advances reviews new developments in areas such as flexible glass, display, and photovoltaics and covers a number of process innovations implemented recently to extend and improve the capabilities of traditional R2R lines. It covers such topics as: coating and solidification processes, in-line vacuum deposition, drying, web handling and winding, polymer film substrates, novel hybrid composite films, flexible solar cells and more. Additionally, this book: Examines key elements (unit operations) of the R2R technology, and discusses how these elements are utilized and integrated to achieve desired process efficiencies in a host of applications. Illustrates several established and novel application areas where R2R processing is utilized in current or future products. Discusses process design methodology and key advantages of R2R manufacturing technology over batch or sheet-to-sheet operations. Roll-to-Roll Manufacturing: Process Elements and Recent Advances is an ideal book for undergraduate and graduate students in various science and engineering disciplines, as well as for scientists, engineers, and technical and business leaders associated in any way with the development, commercialization, and manufacture of a variety of film products.

Ch. 1. Block copolymer thin films / J.-Y. Wang, S. Park and T. P. Russell -- ch. 2. Equilibration of block copolymer films on chemically patterned surfaces / G. S. W. Craig, H. Kang and P. F. Nealey -- ch. 3. Structure formation and evolution in confined cylinder-forming block copolymers / G. J. A. Sevink and J. G. E. M. Fraaije -- ch. 4. Block copolymer lithography for magnetic device fabrication / J. Y. Cheng and C. A. Ross -- ch. 5. Hierarchical structuring of polymer nanoparticles by self-organization / M. Shimomura ... [et al.] -- ch. 6. Wrinkling polymers for surface structure control and functionality / E. P. Chan and A. J. Crosby -- ch. 7. Crystallization in polymer thin films: morphology and growth / R. M. Van Horn and S. Z. D. Cheng -- ch. 8. Friction at soft polymer surface / M. K. Chaudhury, K. Vorvolakos and D. Malotky -- ch. 9. Relationship between molecular architecture, large-strain mechanical response and adhesive performance of model, block copolymer-based pressure sensitive adhesives / C. Creton and K. R. Shull -- ch. 10. Stability and dewetting of thin liquid films / K. Jacobs, R. Seemann and S. Herminghaus -- ch. 11. Anomalous dynamics of polymer Films / O. K. C. Tsui.

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

Electrospun Nanofibers covers advances in the electrospinning process including characterization, testing and modeling of electrospun nanofibers, and electrospinning for particular fiber types and applications. Electrospun Nanofibers offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science. Electrospinning is the most commercially successful process for the production of nanofibers and rising demand is driving research and development in this field. Rapid progress is being made both in terms of the electrospinning process and in the production of nanofibers with superior chemical and physical properties. Electrospinning is becoming more efficient and more specialized in order to produce particular fiber types such as bicomponent and composite fibers, patterned and 3D nanofibers, carbon nanofibers and nanotubes, and nanofibers derived from chitosan. Provides systematic and comprehensive coverage of the manufacture, properties, and applications of nanofibers Covers recent developments in nanofibers materials including electrospinning of bicomponent, chitosan, carbon, and conductive fibers Brings together expertise from academia and industry to provide comprehensive, up-to-date information on nanofiber research and development Offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science

This volume focuses on the state-of-the-art micro/nanofabrication technologies for creating miniature structures with high precision. These multidisciplinary technologies include mechanical, electrical, optical, physical, and chemical methods, as well as hybrid processes, covering subtractive and additive material manufacturing, as well as net-shape manufacturing. The materials the volume deals with include metals, alloys, semiconductors, polymers, crystals, glass, ceramics, composites, and nanomaterials. The volume is composed of 30 chapters, which are grouped into five parts. Engaging with the latest research in the field, these chapters provide important perspectives on key topics, from process developments at the shop level to scientific investigations at the academic level, offering both experimental work and theoretical analysis. Moreover, the content of this volume is highly interdisciplinary in nature, with insights from not only manufacturing technology but also mechanical/material science, optics, physics, chemistry, and more.

Preface -- 1. Introduction to Plastics and Polymers -- 2. Chapter 2 - Introduction to the Mechanical, Thermal and Permeation Properties of Plastics and Elastomers -- 3. Production of films -- 4. Markets and Applications for films -- 5. Styrenic Plastics -- 6. Polyesters -- 8. Polyamides (Nylons) -- 9. Polyolefins -- 10. Polyvinyls & Acrylics -- 11. Fluoropolymers -- 12. High Temperature/High Performance Polymers -- 13. Elastomers and rubbers -- 14. Renewable Resource or biodegradable polymers -- Appendices -- Permeation Unit Conversion Factors -- Vapor Transmission rate Conversion factors.

Semiconductor nanowires promise to provide the building blocks for a new generation of nanoscale electronic and optoelectronic devices. Semiconductor Nanowires: Materials, Synthesis, Characterization and Applications covers advanced materials for nanowires, the growth and synthesis of semiconductor nanowires—including methods such as solution growth, MOVPE, MBE, and self-organization. Characterizing the properties of semiconductor nanowires is covered in chapters describing studies using TEM, SPM, and Raman scattering. Applications of semiconductor nanowires are discussed in chapters focusing on solar cells, battery electrodes, sensors, optoelectronics and biology. Explores a selection of advanced materials for semiconductor nanowires Outlines key techniques for the property assessment and characterization of semiconductor nanowires Covers a broad range of applications across a number of fields

Given such properties as low density and high strength, polymer matrix composites have become a widely used material in the aerospace and other industries. Polymer matrix composites and technology provides a helpful overview of these materials, their processing and performance.After an introductory chapter, part one reviews the main reinforcement and matrix materials used as well as the nature of the interface between them. Part two discusses forming and molding technologies for polymer matrix composites. The final part of the book covers key aspects of performance, including tensile, compression, shear and bending properties as well as impact, fatigue and creep behaviour.Polymer matrix composites and technology provides both students and those in industry with a valuable introduction to and overview of this important class of materials. Provides a helpful overview of these materials, their processing and performance incorporating naming and classification of composite materials Reviews the main reinforcement and matrix materials used as well as the nature of the interface between them including damage mechanisms Discusses forming and molding technologies for polymer matrix composites outlining various techniques and technologies