Studies Of Block Copolymer Thin Films And Mixtures With An Ionic Liquid

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Studies Of Block Copolymer Thin Films And Mixtures With An Ionic Liquid

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Author : Justin Virgili
language : en
Publisher:
Release Date : 2009

Studies Of Block Copolymer Thin Films And Mixtures With An Ionic Liquid written by Justin Virgili and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Block copolymers are capable of self-assembling into structures on the 10-100 nm length scale. Structures of this size are attractive for applications such as nanopatterning and electrochemical membrane materials. However, block copolymer self-assembly in these examples is complicated by the presence of surfaces in the case of thin films and the presence of an additive, such as an ionic liquid, in the case of electrochemical membrane materials. Improved understanding of the structure and thermodynamics of such systems is necessary for the development of structure-property relationships in applications for block copolymers, such as nanopatterning and electrochemical devices. To address the challenge of block copolymer thin film characterization over large areas, resonant soft X-ray scattering (RSoXS) has been applied to characterize order formation in copolymer thin films. Using theory and experiment, the dramatic chemical sensitivity of RSoXS to subtle differences in the bonding energies of different blocks of a copolymer is demonstrated. The unambiguous identification of structure and domain size in block copolymer thin films using RSoXS enables a quantitative comparison of the bulk block copolymer structure and domain size, leading to improved understanding of the impact of surfaces on block copolymer self-assembly. The self-assembly of block copolymer/ionic liquid mixtures has been characterized as a function of block copolymer composition and molecular weight, mixture composition, and temperature using small-angle X-ray scattering (SAXS), optical transmission characterization, wide-angle X-ray scattering (WAXS), and differential scanning calorimetry (DSC). The resulting phase behavior is reminiscent to that of block copolymer mixtures with a selective molecular solvent and lamellar, cylindrical, ordered spherical micelles, and disordered phases are observed. Analysis of order-disorder transitions and molecular weight scaling analysis qualitatively indicates that the segregation strength between block copolymer phases increases with ionic liquid loading. DSC characterization of the thermal properties of the block copolymer/ionic liquid mixtures reveals two composition dependent regimes. At high block copolymer concentrations, a "salt-like" regime corresponding to an increase in the block copolymer glass transition temperature is observed, while at intermediate block copolymer concentrations, a "solvent-like" regime corresponding to a decrease in the block copolymer glass transition temperature is observed. The distribution of ionic liquid within microphase-separated domains of a block copolymer has been characterized using contrast matched small-angle neutron scattering (SANS) and DSC. The ionic liquid is shown to partition selectively into domains formed by one block of a block copolymer in agreement with studies of the phase behavior of ionic liquid/block copolymer mixtures. Unexpected differences in ionic liquid partitioning are observed in mixtures containing a deuterated versus hydrogenated ionic liquid.

Applications Of Ionic Liquids In Polymer Science And Technology

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Author : David Mecerreyes
language : en
Publisher: Springer
Release Date : 2015-04-08

Applications Of Ionic Liquids In Polymer Science And Technology written by David Mecerreyes and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-04-08 with Science categories.

This book summarizes the latest knowledge in the science and technology of ionic liquids and polymers in different areas. Ionic liquids (IL) are actively being investigated in polymer science and technology for a number of different applications. In the first part of the book the authors present the particular properties of ionic liquids as speciality solvents. The state-of-the art in the use of ionic liquids in polymer synthesis and modification reactions including polymer recycling is outlined. The second part focuses on the use of ionic liquids as speciality additives such as plasticizers or antistatic agents. The third part examines the use of ionic liquids in the design of functional polymers (usually called polymeric ionic liquids (PIL) or poly(ionic liquids)). Many important applications in diverse scientific and industrial areas rely on these polymers, like polymer electrolytes in electrochemical devices, building blocks in materials science, nanocomposites, gas membranes, innovative anion sensitive materials, smart surfaces, and a countless set range of emerging applications in different fields such as energy, optoelectronics, analytical chemistry, biotechnology, nanomedicine or catalysis.

Organic Thin Films

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Author : C. W. Frank
language : en
Publisher:
Release Date : 1998

Organic Thin Films written by C. W. Frank and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Science categories.

Contains papers from an April 1997 symposium held in San Francisco, California. Contributions are divided into sections with initial emphasis on structures (monolayers, supramolecular assemblies, and nanostructures) followed by applications (photonics, microlithography, and microelectronics packaging). Specific topics include polymer- supported biomembrane models, glass transition in ultrathin polymer films, mechanistic studies of chemically amplified resists, and polymeric organic-inorganic hybrid nanocomposites. Annotation copyrighted by Book News, Inc., Portland, OR

Polymer Thin Films

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Author : Ophelia Kwan Chui Tsui
language : en
Publisher: World Scientific
Release Date : 2008

Polymer Thin Films written by Ophelia Kwan Chui Tsui and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.

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.

Ionic Liquids In Polymer Systems

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Author : Robin D. Rogers
language : en
Publisher:
Release Date : 2005

Ionic Liquids In Polymer Systems written by Robin D. Rogers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Language Arts & Disciplines categories.

This book includes manuscripts from well-recognized international research groups that have taken different approaches to using ionic liquids in a variety of polymer applications. The chapters on polymer synthesis cover traditional free radical polymerizations, which have been shown to progress rapidly and yield high molecular weight polymers, and reverse atom transfer polymerizations. The ability to tune molecular weights and synthesize block copolymers has been attributed to long free radical lifetimes in ionic liquids. Other chapters cover a variety of uses for ionic liquids in polymer processing, designing specific material properties, and creating novel composites, such as ion gels and ionic liquid-carbon nanotube constructs. This book represents a new and exciting field in polymer chemistry and physics, and is growing rapidly as more fundamental knowledge of ionic liquids is uncovered.

Directed Self Assembly Of Block Copolymer Thin Films From Fundamentals Science To Applications

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Author :
language : en
Publisher:
Release Date : 2014

Directed Self Assembly Of Block Copolymer Thin Films From Fundamentals Science To Applications written by 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.

In Chapter 4, the alignment of block copolymer domains in tapered width channels has been studied. Confined polymer chains undergo elastic deformation to satisfy the channel width constraint and narrow end of the channel imparts a stronger directing field on the alignment of block copolymer domains.

Annual Review Of Nano Research

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Author : Guozhong Cao
language : en
Publisher: World Scientific
Release Date : 2006

Annual Review Of Nano Research written by Guozhong Cao and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Science categories.

The first volume in an exciting new series, Annual Review of Nano Research, this formidable collection of review articles sees renowned contributors from eight different countries tackle the most recent advances in nanofabrication, nanomaterials and nanostructures.The broad coverage of topics in nanotechnology and nanoscience also includes a special focus on the hot topic of biomedical applications of nanomaterials. The important names contributing to the volume include: M R Bockstaller (USA), L Duclaux (France), S Forster (Germany), W Fritzsche (Germany), L Jiang (China), C Lopez (Spain), W J Parak (Germany), B Samori (Italy), U S Schubert (The Netherlands), S Shinkai (Japan), A Stein (USA), S M Hou (China), and Y N Xia (USA).The volume serves both as a handy reference for experts active in the field and as an excellent introduction to scientists whose expertise lies elsewhere but who are interested in learning about this cutting-edge research area.

Annual Review Of Nano Research Volume 1

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Author : Guozhong Cao
language : en
Publisher: World Scientific
Release Date : 2006-12-28

Annual Review Of Nano Research Volume 1 written by Guozhong Cao and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-12-28 with Technology & Engineering categories.

The first volume in an exciting new series, Annual Review of Nano Research, this formidable collection of review articles sees renowned contributors from eight different countries tackle the most recent advances in nanofabrication, nanomaterials and nanostructures.The broad coverage of topics in nanotechnology and nanoscience also includes a special focus on the hot topic of biomedical applications of nanomaterials. The important names contributing to the volume include: M R Bockstaller (USA), L Duclaux (France), S Forster (Germany), W Fritzsche (Germany), L Jiang (China), C Lopez (Spain), W J Parak (Germany), B Samori (Italy), U S Schubert (The Netherlands), S Shinkai (Japan), A Stein (USA), S M Hou (China), and Y N Xia (USA).The volume serves both as a handy reference for experts active in the field and as an excellent introduction to scientists whose expertise lies elsewhere but who are interested in learning about this cutting-edge research area.

Ionic Liquid Based Technologies For Environmental Sustainability

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Author : Mohammad Jawaid
language : en
Publisher: Elsevier
Release Date : 2021-12-04

Ionic Liquid Based Technologies For Environmental Sustainability written by Mohammad Jawaid and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-04 with Science categories.

Ionic Liquid-based Technologies for Environmental Sustainability explores the range of sustainable and green applications of IL materials achieved in recent years, such as gas solubility, biomass pre-treatment, bio-catalysis, energy storage, gas separation and purification technologies. The book also provides a reference material for future research in IL-based technologies for environmental and energy applications, which are much in-demand due to sustainable, reusable and eco-friendly methods for highly innovative and applied materials. Written by eminent scholars and leading experts from around the world, the book aims to cover the synthesis and characterization of broad range of ionic liquids and their sustainable applications. Chapters provide cutting-edge research with state-of-the-art developments, including the use of IL-based materials for the removal of pharmaceuticals, dyes and value-added metals. Describes the fundamentals and major applications of ionic liquid materials Covers up-to-date developments in novel applications of IL materials Provides practical tips to aid researchers who work on ionic liquid applications

Block Copolymer Micellar Thin Films As Templates For The Production Of Tunable Inorganic Nanocluster Arrays And Their Applications

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Author : Ryan Derek Bennett
language : en
Publisher:
Release Date : 2007

Block Copolymer Micellar Thin Films As Templates For The Production Of Tunable Inorganic Nanocluster Arrays And Their Applications written by Ryan Derek Bennett and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

In the past decade, the use of self-assembling systems for the fabrication of materials on the nanometer scale has been an active area of research. Block copolymer thin films are a subclass of' self-assembling systems that have received considerable attention due to their intrinsic nanometer feature size, their ease of synthesis, and their rich phase behavior. While block copolymer thin films have been utilized in a variety of applications, including the nanofabrication of substrates, the modification of surface properties, and the synthesis of photonic structures, this thesis will focus on using the self-assembling properties of block copolymer thin films to synthesize inorganic nanocluster arrays. These arrays have a wide range of possible applications in fields such as catalysis, data storage, and nanofabrication. This thesis demonstrates a general route for using block copolymer micellar thin films as templates to synthesize tunable inorganic nanocluster arrays. The approach utilized amphiphilic block copolymers, such as poly(styrene-block-acrylic acid) and poly(styrene-block-2-vinylpyridine), to create micelles in solution that could be selectively loaded with metal ions and deposited onto a substrate to create quasi-hexagonal arrays of nanoclusters.