Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"in situ polymerization"”.
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Fundamental Studies of Various Poly(L-lactide)/clay Nanocomposite Systems by in-situ Polymerization
Biodegradable plastics are a promising solution to the increasing global concern of persistent plastic wastes on the environment. In order for biodegradable polymers to successfully compete with commodity polymers, mechanical, thermal, and gas barrier properties must be improved. This can be …
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In-situ Polymerization of Methacrylate based Solid Polymer Electrolyte for Solid State Lithium-ion Batteries
In the wake of global transition to renewable energy, the demand for energy storage devices has grown exponentially. With electric vehicles (EVs) becoming mainstream, energy dense lithium-ion batteries (LIBs) are the need of the hour. Conventional liquid electrolyte batteries for LIBs may pose a …
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Semiconductor nanocrystal composite materials and devices
… and possible device applications of the resulting luminescent materials. Chemically synthesized ZnS overcoated CdSe, (CdSe)ZnS, QDs are incorporated into a polymer host material. The main challenge in the preparation of QD-polymer composites is the prevention of both phase separation and …
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Novel interphases: Synthesis, molecular orientation and grafting of liquid crystal polymers on carbon fibers
… has been to study composite materials containing liquid crystal polymers either as matrices or in interfacial boundary zones. The fundamental point of interest here is the interfacial response that fiber surfaces can potentially induce in self ordering polymers. This investigation includes …
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Novel Platforms for Cardiovascular Repair
Collectively the experiments discussed in this thesis represent an attempt to improve upon current cardiovascular cell therapy practices. The first chapter focuses on the regenerative efficacy of immunoselected mesenchymal progenitor cells in the setting of acute myocardial ischemia. Particular …
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Synthesis of polymeric nanocomposites in supercritical carbon dioxide
Supereritical carbon dioxide has been of great interest in various areas of chemical science and engineering during the last decade. In this thesis, the properties of poly (methyl methacrylate) (PMMA)/silica nanocomposites with different surfactant and filler concentrations synthesized through …
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Thermally-responsive interpenetrating polymer network nanoparticles as intelligent therapeutic systems
Thermally-responsive interpenetrating polymer network (IPN) nanoparticles, composed of polyacrylamide, poly(acrylic acid), poly(methacrylic acid), poly(2-ethylacrylic acid), and poly(2-propylacrylic acid), were synthesized using a sequential inverse emulsion polymerization technique. These …
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Development of environmentally benign microencapsulation with polymer microspheres and liposomes
Microencapsulation means applying a shell-like coating to encapsulate the contents of interest in a particle form with a size range of few micrometers or below. In this work, aqueous liposome systems and polymer based encapsulation of fine particles in supercritical CO_2 were studied. Compared to …
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Development of conductive sheet composite based on kenaf fibre loaded with polyaniline for anti-static packaging application.
… the preparation of electrically conductive shielding sheets made up of kenaf fiber and polyaniline (KF/PANI) via in-situ polymerization method. This modification has the potential to be used as static shielding packaging, which will help to prevent the build-up of static electricity during the …
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Modified Nafion membranes for hydrogen production in Cu-Cl thermochemical cycle
… of water by a thermochemical cycle is a promising green method of producing hydrogen on a large scale. A thermochemical cycle is a combination of thermal and chemical reactions that ultimately leads to splitting water into hydrogen and oxygen. The Cu-Cl cycle, which is one of the most promising …
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High-resolution direct ink writing of soft conductive materials
… polymers are important materials that attract increasing attention in diverse fields due to their tunability and easy preparation. The various applications range from tissue-engineering scaffold in the biomedical field to intelligent electronics and energy storage devices. The ability to create …
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Polymer/Clay Nanocomposites as Barrier Materials Used for VOC Removal
The objective of this study was to determine if the method of incorporation of a silicate layered nanoclay into a polymer matrix can affect the barrier properties of the pristine polymer in order to decrease the transport of volatile organic compounds (VOC) in indoor air. Building materials are a …
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Epoxy + Liquid Crystalline Epoxy Coreacted Networks
Molecular reinforcement through in-situ polymerization of liquid crystalline epoxies (LCEs) and a non-liquid crystalline epoxy has been investigated. Three LCEs: diglycidyl ether of 4,4'-dihydroxybiphenol (DGE-DHBP) and digylcidyl ether of 4-hydroxyphenyl-4"-hydroxybiphenyl-4'-carboxylate …
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Novel surfactants for the production of functional nanostructured materials via the ionic self-assembly (ISA) route = Neuartige Tenside für die Synthese funktioneller nanostrukturierter Materialien durch ionische Selbsorganisation
In recent years, the aim of supramolecular syntheses is not only the creation of particular structures but also the introduction of specific functions in these supramolecules. The present work describes the use of the ionic self-assembly (ISA) route to generate nanostructured materials with …
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Preparación de nuevos nanocomposites multifuncionales de matriz epoxi basados en el empleo de materiales grafénicos
In this PhD Thesis, multifunctional epoxy matrix nanocomposite materials have been prepared and characterized, based on graphene related materials (GRMs). Four types of GRMs have been characterized by three different graphite exfoliation techniques: Liquid Phase Exfoliation (LPE) aiming to obtain …
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Tribopolymerization: Anti-Wear Behavior of New High Temperature Additive Classes
… materials have found many new applications in the automotive and other industries. To satisfy demands of higher temperatures and inert surfaces, new lubrication methods for these ceramics need explored and evaluated. This thesis focuses on a boundary lubrication method termed …
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The effect of acid mixtures on biomass cellulose poly (Furfuryl) alcohol nanocomposites
… nanocrystals (CNCs) via acid hydrolysis using sulphuric acid has been intensively studied. Moreover, the use of sulphuric acid requires shorter hydrolysis time, while producing stable suspensions with high yield and crystallinity. However, it results in CNCs with lower thermal stability and …
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Two-dimensional clay and graphene nanosheets for polymer nanocomposites and energy storage applications
… design of clay and graphene nanosheets, targeting special requirements in polymer nanocomposites and energy storage applications. The high aspect ratio and stiffness of clay and graphene nanosheets make them promising candidates to reinforce polymers. However, it is challenging to achieve a …
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Design and characterization of aromatic thermosetting copolyester resin for polymer matrix nanocomposites
… polymer nanocomposite systems utilizing aromatic thermosetting copolyester resin enriched with various forms of nanofiller particles. The molecular weight and crosslinking functionality of precursor oligomers during condensation polymerization reaction regulate thermal-mechanical …
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Microcapsule-based techniques for improving the safety of lithium-ion batteries
… and long cycle life. While they are predominantly used in small consumer electronics, new strategies for improving battery safety and lifetime are critical to the successful implementation of high-capacity, fast-charging materials required for advanced Li-ion battery applications. …
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