Intercalated Polymer-layered Inorganic Nanocomposites PDF Download

Author: Lei Wang
Publisher:
ISBN:
Category : Clathrate compounds
Languages : en
Pages : 518

View

Book Description

Author: Sabu Thomas
Publisher: Woodhead Publishing
ISBN: 0081019041
Category : Technology & Engineering
Languages : en
Pages : 886

View

Book Description
Nanocomposites based on layered double hydroxides (LDHs) have recently become a formidable research area due to their amendable properties and potential applications. The distinct properties of LDH polymer nanocomposites include a wide range of chemical compositions, structural homogeneity, unique anion exchanging ability, easy synthesis, high bound water content, memory effect, non-toxicity and biocompatibility. This means that LDH polymer nanocomposites have the potential for new and innovative applications. Layered Double Hydroxide Polymer Nanocomposites presents a comprehensive overview of the recent innovative advances in the fabrication, characterization and applications of LDH polymer nanocomposites. As well as covering fundamental structural and chemical knowledge, this book also explores various properties and characterization techniques including microscopic, spectroscopic and mechanical behaviors. There is also a strong focus on the potential applications of LDH polymer nanocomposites, such as energy, electrical and electronic, electromagnetic shielding, biomedical, agricultural, food packaging and water purification functions. This book provides comprehensive coverage of cutting-edge research in the field of LDH polymer nanocomposites and their future applications. This book will be an essential read for all academics, researchers, engineers and students working in this area. Fundamental knowledge of LDH polymer nanocomposites, including chemical composition, structural features and fabrication techniques Provides an analytical overview of the different types of characterization techniques and technologies Extensive review on cutting-edge research for potential future applications, in a variety of industries

Author: Akihiro Abe
Publisher: Springer Science & Business Media
ISBN: 9783540253259
Category : Technology & Engineering
Languages : en
Pages : 240

View

Book Description
This series presents critical reviews of the present and future trends in polymer and biopolymer science including chemistry, physical chemistry, physics and materials science. It is addressed to all scientists at universities and in industry who wish to keep abreast of advances in the topics covered. Impact Factor Ranking: Always number one in Polymer Science. More information as well as the electronic version of the whole content available at: www.springerlink.com

Author: Hua Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 350

View

Book Description

Author: Medagama Liyanage Amila Udayanga Liyanage
Publisher:
ISBN:
Category : Clathrate compounds
Languages : en
Pages : 152

View

Book Description
Novel synthetic strategies are developed to prepare new intercalation compounds and nanocomposites with several layered hosts (NiPS3, Na-montmorillonite, MoS2 and MoO3). In these products, alkali metals are ionic intercalates and linear polymers, dendrimers or amines act as co-intercalates. In addition to new synthetic approaches, new structures are identified and characterized. A template synthesis method to prepare NiPS3/polymer nanocomposites is reported for the first time. Polymers studied were polyethylene oxide (PEO), polyethylenimine (PEI), polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP). NiPS3/PEO nanocomposites prepared by this template method contain polymer monolayers (delta d = 0.42 nm) between host layers, in contrast to the polymer bilayers reported in previous reports using a topotactic method. Packing fraction calculations reveals that the interlayer space is denser for template synthesized NiPS3/PEO than for the topotactically-derived MPS3/PEO nanocomposites (M = Ni, Fe, Cd, and Mn). NiPS3/PEI, NiPS3/PVA and NiPS3/PVP nanocomposites were prepared for the first time and also have polymer monolayers between host layers (delta d = 0.41, 0.42 and 1.56 nm, respectively). The monomer unit / NiPS3 formula ratio is ~ 1 for PEO, PEI and PVA nanocomposites and ~ 0.5 for PVP nanocomposites. More dilute conditions, more polar solvents, and longer aging times increase the crystallite size of the obtained products. Reaction progress studies indicate that the P2S6p4− and Ni2+ concentrations in the reaction mixture govern nanocomposite nucleation and growth. Intercalated nanocomposites with lower generation (G0.0-2.0) polyamidoamine (PAMAM) dendrimers and Na-montmorillonite (Na-MMT) are synthesized using an exfoliation-adsorption method. This is the first report of the G0.0 and G1.0 PAMAM/Na-MMT nanocomposites and of a structurally-ordered G2.0 PAMAM/Na-MMT nanocomposite. The structures obtained depend on the PAMAM generation and the starting reactant ratio. The spherical PAMAM in aqueous medium transforms to a highly flattened conformation after incorporation between the host layers. G0.0 PAMAM forms only monolayer galleries (delta d = 0.42 nm), while G2.0 PAMAM forms monolayers, bilayers, (delta d = 0.84 nm) and mixed phase structures at lower, higher, and intermediate, organic content, respectively, and exhibits an interesting monolayer to bilayer transition. G1.0 PAMAM shows intermediate behavior, with a monolayer to mixed-phase transition observed at the reactant ratios studied. This is the first report of a monolayer arrangement for PAMAM/clay nanocomposites. The maximum organic contents of G0.0 PAMAM monolayer and G2.0 PAMAM bilayer nanocomposites are ~7% and ~14% respectively, and these materials have ~2 times lower packing fractions (0.31-0.32) than for linear polymer intercalate nanocomposites of Na-MMT. Under acidic conditions all these nanocomposites form only monolayer galleries, which is ascribed to the stronger electrostatic attraction between negatively charged MMT layers and protonated PAMAM. Acidic conditions also slow the rate of formation of the nanocomposites and generate more ordered products. The Na+ ions in the Na-MMT structure play a significant role in PAMAM/Na-MMT nanocomposite formation. Both Na-MMT and PAMAM structural units are preserved in the nanocomposites obtained. Electride solutions obtained by dissolution of Na(m) in ethylenediamine (en) are used for the first time to generate MoS2 intercalation compounds with Na and en as intercalate and cointercalate, respectively. Two new phases, labeled [alpha] and [beta], have delta d = 0.35 and 0.57 nm, respectively; the different gallery dimensions are ascribed to parallel vs. perpendicular orientations of en in the galleries. The B phase structure has not been reported previously in any MS2 intercalation compounds. The intercalation reaction proceeds via the formation of a metastable kinetic product, the [beta] phase, and the subsequent generation of the thermodynamically stable [alpha] phase. Lower electride concentrations, lower reaction temperatures and shorter reaction times favor production of the [beta] phase. The products obtained have compositions of Na0.2-0.3MoS2·0.3-0.4en with a larger packing fraction than the structurally analogous A-en-GICs (A = alkali metal, GIC = Graphite intercalation compound). The electrochemical reduction of MoS2 in en/NaPF6 does not result in these intercalation reactions. The incorporation of dendrimers into MoO3 is reported for the first time. PAMAM/MoO3 nanocomposites are synthesized using an exfoliation - adsorption method. G0.0 PAMAM only forms monolayers (delta d = ~ 0.5 nm) between MoO3 layers and G2.0 PAMAM forms both monolayer and bilayers (delta d = ~ 0.7-0.8 nm). In addition to these two structures, a third unknown phase is observed with a much larger gallery expansion (delta d = ~ 1.4 nm). These nanocomposites have a comparable structures, compositions (12-14% organic component for G0.0 monolayer and 22-25% for G2.0 bilayer) and packing fractions (0.5-0.7 for monolayer and 0.7-0.9 for bilayer) to those in the previously reported linear polymer/MoO3 nanocomposites. In the above studies, analyses by powder X-ray diffraction (PXRD) are supported by compositional data from thermogravimetric analyses (TGA) and structural optimization (Gaussian). Additionally, the product morphologies, surface properties and constituents are evaluated using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Fourier transform infrared (FTIR) and Raman spectroscopies. UV-visible spectroscopy (UV-vis) is used to monitor reaction progress. Capillary zone electrophoresis (CZE) is used to study compositions and reaction progress.

Author: Nipaka Sukpirom
Publisher:
ISBN:
Category : Clathrate compounds
Languages : en
Pages : 280

View

Book Description

Author: Sabu Thomas
Publisher: Nova Publishers
ISBN: 9781604560633
Category : Science
Languages : en
Pages : 410

View

Book Description
The present book focuses on the preparation, properties, characterisation and applications of polymer nanocomposites. The various manufacturing techniques, analysis of morphology, filler dispersion, and interfacial interactions have been described are detail. In the case of polymer nanocomposites, filler dispersion, intercalation/exfoliation, orientation and filler-matrix interaction are the main parameters that determine the physical, thermal, transport, mechanical and rheological properties of the nanocomposites. In this book the ultimate properties of the nanocomposites have been correlated with the key parameters of filler dispersion and filler-matrix interaction. The use of various sophisticated instrument techniques for the characterisation of these nanocomposites are also reviewed.

Author: Smita Mohanty
Publisher: John Wiley & Sons
ISBN: 1119179068
Category : Technology & Engineering
Languages : en
Pages : 600

View

Book Description
This book covers all aspects of the different classes of nanomaterials – from synthesis to application. It investigates in detail the use and feasibility of developing nanocomposites with these nanomaterials as reinforcements. The book encompasses synthesis and properties of cellulose nanofibers, bacterial nanocellulose, carbon nanotubes / nanofibers, graphene, nanodiamonds, nanoclays, inorganic nanomaterials and their nanocomposites for high-end applications such as electronic devices, energy storage, structural and packaging. The book also provides insight into various modification techniques for improving the functionality of nanomaterials apart from their compatibility with the base matrix.

Author: Jitendra K. Pandey
Publisher: Springer Science & Business Media
ISBN: 3642386490
Category : Technology & Engineering
Languages : en
Pages : 538

View

Book Description
Volume A of Handbook of Polymer Nanocomposites deals with Layered Silicates. In some 20 chapters the preparation, architecture, characterisation, properties and application of polymer nanocomposites are discussed by experts in their respective fields

Author: Sabu Thomas
Publisher: John Wiley & Sons
ISBN: 352765240X
Category : Technology & Engineering
Languages : en
Pages : 294

View

Book Description
Polymer composites are materials in which the matrix polymer isreinforced with organic/inorganic fillers of a definite size andshape, leading to enhanced performance of the resultant composite.These materials find a wide number of applications in such diversefields as geotextiles, building, electronics, medical, packaging,and automobiles. This first systematic reference on the topic emphasizes thecharacteristics and dimension of this reinforcement. The authors are leading researchers in the field from academia,government, industry, as well as private research institutionsacross the globe, and adopt a practical approach here, coveringsuch aspects as the preparation, characterization, properties andtheory of polymer composites. The book begins by discussing the state of the art, new challenges,and opportunities of various polymer composite systems. Interfacialcharacterization of the composites is discussed in detail, as isthe macro- and micromechanics of the composites. Structure-propertyrelationships in various composite systems are explained with thehelp of theoretical models, while processing techniques for variousmacro- to nanocomposite systems and the influence of processingparameters on the properties of the composite are reviewed indetail. The characterization of microstructure, elastic,viscoelastic, static and dynamic mechanical, thermal, tribological,rheological, optical, electrical and barrier properties arehighlighted, as well as their myriad applications. Divided into three volumes: Vol. 1. Macro- and Microcomposites;Vol. 2. Nanocomposites; and Vol. 3. Biocomposites.