Дисертації з теми "Polymers-applications"
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Patil, Satish Amrutrao. "Ladder polymers for photonic applications." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972447490.
Повний текст джерелаLochab, Bimlesh. "Polymers for electro-optic applications." Thesis, University of Oxford, 2006. http://ora.ox.ac.uk/objects/uuid:34ac7813-b315-415c-ac8a-eac269c23432.
Повний текст джерелаKishi, Mariko. "Synthetic polymers for ophthalmic applications." Thesis, Aston University, 1987. http://publications.aston.ac.uk/9721/.
Повний текст джерелаBogdanowicz, Krzysztof Artur. "Liquid Crystalline Polymers for Smart Applications." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/321835.
Повний текст джерелаActualmente, PCL que incorporan elementos activos en la estructura (p.e., grupos de foto-sensibles, dendrones, etc.) conducen a un material selectivamente sensible. Se informa de que los polímeros se pueden aplicar en varios sistemas p.e. como materiales con memoria de forma, sensores o pantallas foto-ópticas. Nuestros estudios se centran en dos aplicaciones diferentes: microcápsulas fotosensibles para sistemas de entrega controlada y las membranas autoensambladas conductoras de protones para la fotosíntesis artificial. La versatilidad y las propiedades anisotrópicas de PCL, los hacen como candidatos ideales para numerosos aplicaciones inteligentes. Para obtener sistemas con liberación foto-activa, una familia de copolímeros, que contiene alfa-estilbeno y diferentes espaciadores se han diseñado y sintetizado. Alfa-estilbeno es un mesogéno foto-activo. Las microcápsulas basadas de alfa-metilestilbeno, con vainillina en núcleo, estaban preparados. Experimento de liberación con y sin fotoirradiación demostró la eficacia de este sistema. CLP de estructura adecuada para auto-ensamblaje en una estructura columnar que podría ser efectivo en el transporte de protones selectivo. Alineación homeotrópica de columnas en una membrana polimérica permite conseguir conductividad de protones. Objetivo de nuestro trabajo fue: lograr estructuras organizadas utilizando poliaminas modificadas con un mesógeno dendrítico en posición lateral; preparación de membranas orientadas usando estos materiales poliméricos; evaluar la eficacia de las membranas hacia el transporte de protones. Se prepararon membranas híbridas de cerámica/poliamina. El material mostró alta conductividad de protones selectiva y transporte agua-independiente.
Liquid Crystalline Polymers (LCPs) possess properties which are a combination of crystalline solids and fluids. Currently, LCPs which incorporate active elements into the structure (i.e. photo-sensitive groups, dendrons, etc.) lead to selectively sensitive material. It is reported, that those polymers can be applied in a variety of systems i.e. as memory-shape materials, sensors or photo-optical displays. Our studies are focused on two different applications: photosensitive microcapsules for controlled delivery systems and self-assembly proton-conducting membranes for artificial photosynthesis. The extreme versatility and the characteristic anisotropic properties of LCPs, make them the ideal candidates for numerous smart applications. To achieve systems with photo-triggered release, a family of copolymers which contained alpha-methylstilbene and different spacers were designed and synthesized. Alpha-methylstilbene is a well-known photo-active mesogenic group. Microcapsules based on alpha-methylstilbene containing vanillin as a core were prepared. Release experiment in the presence and the absence of photoirradiation proved the effectiveness of this system. LC polymers of proper structure self-assembly into a columnar structure which could be effective in selective proton transport. Homeotropic alignment of columns in a polymeric membrane allows to achieve proton-conductivity. Aim of our work was: achieving organized structures using polyamine modified with a dendritic mesogen in side position; preparing oriented membranes based on this polymeric materials;assessing the effectiveness of the prepared membranes toward proton transport. Hybrid ceramic/polyamine membranes were prepared. The new material showed high selective proton conductivity and water independent transport.
Inal, Sahika. "Responsive polymers for optical sensing applications." Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/7080/.
Повний текст джерелаAls Reaktion auf bestimmte äußere Stimuli ändern bestimmte wasserlösliche Polymere reversibel ihren physikalischen Zustand. Dieser Vorgang kann mithilfe von Fluorophoren, die in die Polymerstrukturen eingebaut werden und deren Fluoreszenzeigenschaften vom Polymer¬zustand abhängen, detektiert werden. Diese Idee ist der Ausgangspunkt der vorliegenden Arbeit, die sich damit beschäftigt, wie äußerlich induzierte Änderungen der Löslichkeit solcher Polymere mit kovalent gebundenen Fluorophoren in Wasser in ein deutlich messbares Fluoreszenzsignal übersetzt werden können. Dazu werden photophysikalische Phänomene wie Fluoreszenz-Resonanz¬energie¬transfer und Solvatochromie ausgenutzt. In Kombination mit einem responsiven Polymergerüst wird es möglich, verschiedene Stimuli wie Lösungs¬temperatur oder Ionenstärke, oder auch Assoziation-Dissoziation Reaktionen mit anderen Makromolekülen oder biochemische Bindungs¬reaktionen über die Änderung von Fluorezenz¬farbe bzw. –Intensität autonom mit bloßem Auge zu detektieren. Unter anderem wurde ein wässriger ratiometrischer Temperatur- und Salzsensor entwickelt, der auf der komplexen supramolekularen Struktur eines thermoresponsiven Copolymers und eines thiophenbasierten konjugierten Polyelektrolyts beruht. Die Anbindung solvato¬chromer Fluorophore erlaubte den empfindlichen Nachweis einer Temperatur¬änderung oder des Vorhandenseins von Analyten. Komplexere Phänomene wie das kompetitive Anbinden von Analyten ließen sich hochempfindlich steuern und auslesen, indem gleichzeitig die Sensitivität dieser Polymeren gegenüber der Temperatur und spezifischen Antikörpern ausgenutzt wurde. Überraschenderweise wiesen die hier untersuchten thermoresponsiven Polymere wie poly-N-isopropylacrylamid (pNIPAm) oder poly-Oligoethylenglykolmethacrylate (pOEGMA) große Unterschiede bzgl. ihrer responsiven optischen Eigenschaften auf. Dies erforderte eine ausführliche Charakterisierung des Fluoreszenz- und Aggregationsverhaltens, unter- und oberhalb des Phasenübergangs, im Bezug auf die chemische Struktur. Ein Ergebnis war, dass alle drei Polymertypen sehr ähnliche temperaturabhängige makroskopische Absorptionseigenschaften aufweisen, während sich die Eigenschaften auf molekularer Ebene, wie der Hydratisierungsgrad oder die intermolekulare Polymerkettenaggregation, bei diesen Polymeren sehr unterschiedlich. Diese Arbeit zeigt damit anhand zweier sehr etablierter thermoresponsiver Polymere, nämlich pNIPAm und pOEGMA, das die chemische Struktur entscheidend für den Einsatz dieser Polymere in fluoreszenzbasierten Sensoren ist. Diese Ergebnisse haben große Bedeutung für die gezielte Entwicklung von Polymermaterialien für fluoreszenzbasierte Assays.
Wang, Jinfang. "Xanthine-imprinted polymers for decaffeination applications." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431777.
Повний текст джерелаSpampinato, Nicoletta. "Ferroelectric polymers for organic electronic applications." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0392/document.
Повний текст джерелаOrganic electronics represent a realistic alternative to conventional silicon-based technologies through the design, synthesis and implementation of functional organic materials into light and flexible devices. Organic materials, such as small molecules or organic polymers, are advantageous for their low-cost, flexibility and easy processing. Thanks to the economical and timesaving advantages, organic electronics have emerged as an innovative field with application in energy, environment, health, information and communication technologies.Organic electronics originates from the discovery of polymers with semiconducting functionalities. However, one should not neglect another class of outstanding polymers, the ferroelectric polymers. The electroactive nature of ferroelectric polymers, which are also pyroelectric and piezoelectric, combined with the intrinsic advantages of polymers have designated them as constituent elements of a widespread range of organic electronic devices. The most well-known family of ferroelectric polymers is that of poly(vinylidene fluoride), P(VDF), and its copolymers with trifluoroethylene, P(VDF-co-TrFE). Energy harvesting, data storage and sensing, main applications of organic electronics, can potentially all be realised using these exceptional functional materials.Since ferroelectricity is a structure-dependent property an insight into the interrelations between structure and final ferroelectric properties is indispensable in order to improve existing applications of ferroelectric polymers in organic electronics and to promote the introduction of P(VDF-co-TrFE) in new application fields. P(VDF-co-TrFE) as semi-crystalline polymer possess crystalline properties which are sensitive to thermal treatment. Since only the crystalline regions contribute to ferroelectric switching and not the amorphous ones, the degree of crystallinity is a key factor to modulate the ferroelectric properties. Moreover, crystallites orientation as well as the presence of defects within the crystallites are crucial parameters playing an important role in defining the final performance of the devices in which P(VDF-co-TrFE) is incorporated.Herein stands the aim of this thesis: reach an exhaustive understanding of processing-structure-function relationships that will serve as tool to modulate ferroelectric devices performances.Going one step further, the potential applications of P(VDF-co-TrFE) in organic electronics are explored by investigating it in: (1) medical piezoelectric catheter sensors for measuring cardiac function and eventually for detecting cardiac disease and (2) electronic devices in which P(VDF-co-TrFE) is blended with the semiconducting polymer poly(3-hexylthiophene), P3HT. The latter has already been applied in non-volatile ferroelectric memory diodes and the potential use in organic photovoltaics is explored
Kuroda, Kenichi 1972. "Thermally responsive polymers and their applications." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29641.
Повний текст джерелаVita.
Includes bibliographical references.
This thesis focuses on development of polymeric materials that can alter their functions according to temperature changes. We chose poly(N-isopropylacrylamide) (polyNIPA) as a platform, which phase-separates from water upon heating. The thermally responsive properties and applications of polyNIPA are introduced in Chapter One. In Chapter Two, we described the synthesis of polyNIPA gels with an imidazole comomoer and examined copper ion adsorption by the swollen (room temperature) and shrunken gels (60⁰C). The data analysis using a Langmuir adsorption isotherm indicates that the imidazole groups form 2:1 and 4:1 complexes with a copper ion in the swollen and shrunken gels, respectively, which suggests that thermal gel swelling and shrinking control the formation of multivalent Cu complexes by changing the distance among imidazole groups. In Chapters Three to Six, the synthesis of polyNIPA-conjugated polymer block copolymers and their applications are described. Non-ionic water-soluble poly(phenylene-ethynylene)s (PPEs) (Chapter Three) were used as conjugated polymer segments in the block copolymers. In a route to synthesis of the block copolymers, atom transfer radical polymerization (ATRP) and nitroxide-mediated radical polymerization (NMRP) of NIPA were developed. Incorporation of ATRP or NMRP initiators to the polymer ends of PPEs and the following polymerizations of NIPA were expected to provide tri-block copolymers with precise structures. The ATRP method produced pure polyNIPA with monodisperse and defined molecular weights (Chapter Four). However, endcapping of PPEs with an ATRP initiator ((α-chloroamide) was not successful due to its instability to PPE polymerization conditions (Chapter Five).
(cont.) On the other hand, PPEs could be endcapped with a NMRP initiator (a tert-butyl nitroxide derivative), and the following NMRP of NIPA provided the tri-block copolymers (Chapter Six), phase-separate from aqueous solutions upon heating due to the polyNIPA aggregation. In Chapter Six, we examined fluorescence resonance energy transfer (FRET) between a PPE-polyNIPA block copolymer and Rhodamine B (RhB) bound to polyNIPA. The RhB emission from the polymer precipitates produced by thermally induced phase-separation from the aqueous mixtures increased relative to that from the solutions, which indicates that thermal precipitation brought the PPE and RhB within the F6rster radius of each other and induced FRET between the PPE and RhB.
by Kenichi Kuroda.
Ph.D.
Maine, Elicia M. A. (Margaret Anne). "Future of polymers in automotive applications." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10509.
Повний текст джерелаSvensson, Mikael. "Conducting redox polymers for battery applications." Thesis, Uppsala universitet, Strukturkemi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-415137.
Повний текст джерелаMartin, Benjamin Ryan. "Energy Harvesting Applications of Ionic Polymers." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32024.
Повний текст джерелаMaster of Science
wang, xin. "PEPTIDE LINKED POLYMERS FOR CADIOVASCULAR APPLICATIONS." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1340826344.
Повний текст джерелаPerrot, Solène. "Semi-metallic polymers for thermoelectric applications." Thesis, Bordeaux, 2021. http://www.theses.fr/2021BORD0043.
Повний текст джерелаThermoelectric (TE) materials have the potential to convert vast amounts of waste heat directly into electricity, therefore reducing the dependence on fossil fuel. In thermoelectrics, the concept of a phonon glass/electron crystal is often used to describe an ideal thermoelectric material. According to this concept, a good TE material should inhibit the conduction of phonons (thus having a low thermal conductivity) while efficiently conducting electronic charge carriers (high electrical conductivity). In order to quantify the efficiency of TE systems, the figure of merit, ZT, is used as a measure of performance. Recently, conducting polymers have gained momentum in the TE community for applications at room temperature. Their great advantage is an intrinsically low thermal conductivity at room temperature (0.2-0.6 W.m-1K-1) that is complemented by their easy processability and their low cost. Thin films of poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives doped with p-toluenesulfonate (Tos) molecules can exhibit a ZT as high as 0.25 at room temperature underlining the high potential of such systems for future applications. In this thesis, we focused on the understanding of PEDOT:Tos thin films properties by playing on the polymerization method. We demonstrated that the electrical conductivity can be improved by adding additives to the formulation of PEDOT:Tos materials. Moreover, the concentration of p-toluenesulfonate is an important parameter to tune the electrical conductivity without changing the Seebeck coefficient. Finally, the hybridization of PEDOT:Tos precursors with block copolymers allows us to design PEDOT:Tos nanostructures
Apaydin, Dogukan Hazar. "Electrochromic And Photovoltaic Applications Of Conjugated Polymers." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614481/index.pdf.
Повний текст джерелаTse, Chui-wan. "Rhenium containing hyperbranched polymers for photonic applications." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38574512.
Повний текст джерелаRafati, Ali. "The analysis of polymers for biomedical applications." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/11914/.
Повний текст джерелаTse, Chui-wan, and 謝翠雲. "Rhenium containing hyperbranched polymers for photonic applications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38574512.
Повний текст джерелаPierre, Viera Marie. "New water-soluble polymers for surface applications." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4205/.
Повний текст джерелаNoimark, Sacha M. "Light-activated antimicrobial polymers for healthcare applications." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1470179/.
Повний текст джерелаAmara, John Paul. "Polymers for electronics and chemical sensing applications." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36256.
Повний текст джерелаVita.
Includes bibliographical references.
The incorporation of molecular structures such as shape persistent molecular frameworks, strong hydrogen bond donor groups or perfluoro-alkyl groups can result in considerable gains in the performance of some established polymeric materials. This dissertation details the synthesis and properties of polymers that demonstrate such types of functionality for emerging electronics and chemical sensing applications. In Chapter 1, we present a general introduction to organic electronic materials and chemical sensory technologies. This chapter introduces many of the important principles that are explored throughout the rest of the text. In Chapters 2 and 3, we develop some novel polymeric materials for organic electronics applications. In Chapter 2, the development of several insulating polymers that demonstrate very high porosity in the solid state is discussed. The high porosity is provided by rigid three-dimensional frameworks, which present large amounts of internal free volume. In Chapter 3, we present the development of conducting polymeric materials that present rigid iptycene frameworks. These materials are prepared through an electro-chemical deposition process.
(cont.) In Chapter 4, we find that the performance of an established conjugated polymer-based chemical sensory technology can be enhanced through the employment of pendant hexafluoroisopropanol groups that function as strong hydrogen bond-donating sorbant elements for weakly-binding analytes. In Chapter 5, we demonstrate that these hexafluoroisopropanol groups can be incorporated into a host of polymeric materials through a unique solid-state functionalization step that employs the reactive chemical hexafluoroacetone. These materials may be useful for analyte pre-concentration applications. Finally, in Chapter 6, we develop new, highly-luminescent conjugated polymers for future organic light-emitting diode-based display applications using hexafluoroacetone as a source of fluorination for the polymers. These materials demonstrate greater photo-oxidative stability that may extend their lifetimes in device applications.
by John Paul Amara.
Ph.D.
Long, James. "Protein containing porous polymers for biocatalytic applications." Thesis, Liverpool John Moores University, 2005. http://researchonline.ljmu.ac.uk/5660/.
Повний текст джерелаTreharne, Andrew J. "Development of biocompatible polymers for ocular applications." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/344289/.
Повний текст джерелаLi, Bin. "Molecularly imprinted polymers for applications in cosmetology." Thesis, Compiègne, 2013. http://www.theses.fr/2013COMP2083.
Повний текст джерелаMolecularly imprinted polymers (MIPs) are tailor-made synthetic receptors possessing specific cavities for a given target molecule. They are produced by introducing, into the polymer precursors, guest molecules that act as templates at the molecular level. Interacting and cross-linking monomers are then copolymerized to form a cast-like shell. After removal of the template, cavities complementary to the template in size, shape and position of functional groups are revealed in the polymer, which can now specifically bind the template. Thanks to these specific molecular recognition properties, MIPs have found applications in areas like bio sensors, solid phase extraction, affinity chromatography, catalysis, and drug delivery. Although the MIP concept originated from imprinted silica in the 1930s, imprinted sol-gel materials received little attention afterwards due to the introduction of the more versatile organic polymers as imprinting matrix. However, compared to organic polymers, sol-gels possess higher thermal stability, better water compatibility and larger inner surface area. There have been many applications to biomolecules in aqueous conditions with sol-gel imprinting materials. In this thesis, we have developed organic and silica sol-gel MIPs for applications in cosmetics and drug delivery. MIPs able to adsorb the dandruff-inducing molecule oleic acid (OA) were produced via both the organic and inorganic routes. In the organic MIPs synthesis, different positively charged monomers were used, one of which, acryloyl aminobenzamidine, was specifically synthesized. Although some binding of oleic acid was obtained, specificity and capacity of these polymers were not satisfying. Sol-gel MIPs, on the other hand, exhibited good specific recognition and high binding capacity for OA. A MIP of the composition OA:APTES:TEOS= 1:1.6:1.7 yielded a capacity of 625 μmol.g-1 in artificial sebum. Furthermore, tests were carried out to capture OA on stratum corneum and reconstructed skin (Episkin). Less penetration of OA was observed in the presence of a MIP than with a non-imprinted control polymer. Deodorant materials are another topic of this thesis. MIPs that are able to adsorb certain precursors of odorant molecules, the glutamine conjugates of (E)-3-methyl-2-hexenoic acid (3M2H) and 3-hydroxy-3-methyl-hexanoic acid (3H3MH) were prepared. N-hexanoyl glutamine and N-hexanoyl glutamate were used as templates. After optimization of the MIP composition, we found that MIPs synthesized with acryloyl aminobenzamidine as functional monomer had the highest adsorption capacity for N-hexanoyl glutamine, and also recognised the glutamine targets of 3M2H and 3H3MH. Some preliminary promising binding results were obtained in artificial sweat. The third part of this work concerns a drug delivery MIP. Salicylic acid (SA) is a drug used to treat acne. SA-imprinted polymers were prepared via both organic imprinting and the sol-gel process.Compared to organic MIPs, sol-gel MIPs have a higher capacity, 180 μmol.g-1, and 7 times higher binding than to a non-imprinted control polymer was observed. Release tests were carried out in different aqueous media, the most efficient drug release was observed in pure water. In conclusion, applications of molecularly imprinted polymers for cosmetics and drug delivery have been investigated. Our results demonstrate the great potential of in particular sol-gel MIPs for these purposes
Cartwright, Luke. "Donor-acceptor conjugated polymers for optoelectronic applications." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/12054/.
Повний текст джерелаVolodin, Boris Leonidovich 1965. "Design, physics, and applications of photorefractive polymers." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282188.
Повний текст джерелаNimmagadda, Alekhya. "Design, Synthesis, Applications of Polymers and Dendrimers." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7430.
Повний текст джерелаCocchi, Davide <1989>. "Nanofibrous-structured polymers and their engineering applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9666/1/cocchi_davide_tesi.pdf.
Повний текст джерелаBasto, M. José Ricardo. "Mechanical characterization of aged recycled polymers and applications." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2649.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xxv, 217 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 163-164).
Kellam, Edwin Clay. "The synthesis and applications of phosphazene-containing polymers." Full text available online (restricted access), 2001. http://images.lib.monash.edu.au/ts/theses/Kellam.pdf.
Повний текст джерелаForsberg, Julia. "Derivatisation of Betulin for industrial applications : - Green polymers." Thesis, Umeå universitet, Kemiska institutionen, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-66951.
Повний текст джерелаSchmit, Jean-Paul. "Novel polymers for applications in light emitting diodes." Thesis, Lancaster University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322867.
Повний текст джерелаAl-Eid, Manal Ali. "Redox-active molecules and polymers with photovoltaic applications." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4657/.
Повний текст джерелаHarismah, Kun. "Development of New Carbazole Polymers for LED Applications." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500291.
Повний текст джерелаYin, Xunqian. "Modification of electrostrictive polymers and their electromechanical applications." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0041/document.
Повний текст джерелаElectroactive polymers (EAPs), which can realize the conversion between electrical and mechanical energy, have been emerging as one of the most interesting smart materials in the past two decades due to their low density, excellent mechanical properties, ease of processing, low price and potential applications in the fields of sensors, actuators, generators, biomimetic robots and so on. The object of this work is to modify electrostrictive terpolymers with different approaches to improve the electromechanical performances and to develop some applications based on modified terpolymers. Firstly, an organic/inorganic (terpolymer/carbon black) nanocomposite was prepared to improve the dielectric permittivity based on the percolation theory. Secondly, based on the heterogeneous nature of semi-crystalline terpolymer and the important role that interface polarization plays for dielectric and electromechanical response, small molecular plasticizer bis(2-ethylhexyl) phalate (DEHP) was introduced into electrostrictive terpolymer to form an all-organic polymer composite with improved electromechanical performances. Finally, two applications including mechanical energy harvesting and microfluidic pump based on DEHP modified terpolymers were investigated
Beldon, Patrick John. "New synthetic methods & applications for coordination polymers." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708056.
Повний текст джерелаBenzeval, Ian. "Development of responsive polymers for drug delivery applications." Thesis, University of Bath, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500696.
Повний текст джерелаDai, Xiaoshu. "Synthesis and Processing of Polymers for Biomedical Applications." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-dissertations/431.
Повний текст джерелаKim, Youngmi Ph D. "Synthesis and applications of electron deficient conjugated polymers." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32484.
Повний текст джерелаVita.
Includes bibliographical references.
Chapter 1. In this introductory chapter, we present the general properties of conjugated polymers for sensory and electronic applications, with a special emphasis placed on electron-deficient materials. Chapter 2. In this chapter is presented the synthesis, characterization, and applications of a series of electron-deficient poly(p-phenylene vinylene)s (PPVs) homopolymers and copolymers. Poly(p-phenylenevinylene)s containing trifluoromethyl substituted aromatic rings (CF3- PPVs) exhibited high photooxidative stability to give robust materials suitable for molecular electronic device applications. Chapter 3. Hyperconjugative and Inductive Perturbations in Poly(p-phenylene vinylenes) New approaches that produce high fluorescence quantum yields and also tune electron affinity of conjugated polymers are presented. Novel three-dimensional poly(phenylene vinylenes) having [2.2.2] bicyclic ring system were synthesized to give highly efficient solid- state fluorescence and hyperconjugative and inductive electronic perturbations. The ability of hyperconjugative and inductive perturbation to tune the polymers' sensory applications was determined by investigating the fluorescence quenching responses to electron-rich and electron-deficient analytes in solution and solid thin films. Chapter 4. High Ionization Potential Conjugated Polymers In this chapter is presented a series of poly(p-phenylene ethynylenes) (PPEs) with high ionization potentials. Their photophysical properties were investigated using steady-state and time-resolved fluorescence techniques.
(cont.) The ionization potentials of the polymer thin films were determined using ultraviolet photoelectron spectroscopy (UPS), and those with the highest ionization potentials displayed high sensitivity for the detection of electron-donating aromatic compounds. The effects of sterics and electronic properties on the polymers' sensory responses were investigated by fluorescence quenching experiments in both solution and solid thin films. In addition, in some cases the excited state charge-transfer complexes (exciplexes) of the PPEs with analytes were observed. These effects provide promising opportunities for the formation of sensitive and selective chemical sensors. Chapter 5. Highly Emissive Conjugated Polymer Excimers Conjugated polymers often display a decrease of fluorescence efficiency upon aggregation due in large part to enhanced interpolymer interactions that produce weakly emissive species generally described as having excimer character. We have found that poly(phenylene ethynylene)s with fused pendant [2.2.2] ring structures having alkene bridges substituted with two ester groups function to give highly emissive, broad, and red-shifted emission spectra in the solid state. To best understand the origin of this new solid-state emissive species, we have performed photophysical studies of a series of different materials in solution, spin-coated thin films, solid solutions, and Langmuir films. We conclude that the new, red-shifted, emissive species originate from excimers produced by interchain interactions being mediated by the particular [2.2.2] ring system employed.
(cont.) The ability to predictably produce highly emissive excimers from conjugated polymers is important for the understanding how solid-state structures can control emissive behaviors. Chapter 6. Electron-Deficient Polyelectrolytes For Biosensory Applications In this chapter is described a novel photo-oxidizing water-soluble fluorescent polymer that was designed for the detection of electron-rich biological analytes. The polymer fluorescence is strongly quenched through an efficient photoinduced electron transfer from electron-donating aromatic moieties in amino acids, neurotransmitters, and proteins to the photo-oxidizing polymer. These efficient fluorescence quenching responses may be further enhanced by rapid exciton migration in the polymer backbone and further facilitated by ion- pairing between the polymer and quencher.
by Youngmi Kim.
Ph.D.
Ruano, Torres Guillem. "Conducting polymers and hybrid materials for technological applications." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/673194.
Повний текст джерелаDegut al desenvolupament de l'economia globalitzada i la industrialització, s'ha accelerat l'esgotament de recursos naturals i fonts d'energia no renovables. En els últims anys, la comunitat científica ha dedicat una gran part dels seus esforços a desenvolupar i millorar les fonts d'energia renovable. En aquest context, els capacitors electroquímics, o supercapacitors, han rebut un gran interès degut a les seves propietats i potencials aplicacions. El principal camp de treball d'aquesta tesis són els supercapacitors i les diferents parts que els constitueixen, més concretament la tesis estudia l'ús d'hidrogels en diverses funcions diferents. El treball fet a la tesis s'ha desenvolupat tant a nivell experimental com corroborat mitjançant estudis teòrics basats en la mecànica quàntica i la dinàmica molecular. El cos principal de la tesis està dividit en 3 parts. La primera part inclou la síntesis i caracterització d'un hidrogel derivat d'una poliesteramida insaturada com a electròlit sòlid en un supercapacitor. Aquesta part consta de la caracterització electroquímica de l'hidrogel obtingut, avaluant el rendiment de l'hidrogel a l'hora d'actuar com un electròlic sòlid, així com també consta d'un estudi de difusió dels ions a través d¿aquest dut a terme amb dinàmica molecular. Aquests estudis permeten obtenir les condicions òptimes per la síntesis i ús d'aquest hidrogel. La segona part està dedicada a la preparació i caracterització d'un sistema multicapa com a elèctrode en un supercapacitor. Més concretament, es basa en la preparació d'un sistema multicapa format per PVA i el polímer conductor PEDOT, preparat mitjançant un procés capa per capa. El capítol consta també d'un estudi teòric de mecànica quàntica en el que s'estudia el moviment i canvis d'una monocapa de PEDOT, i permet elucidar els mecanismes i propietats electròniques que no s'havien entès completament a nivell experimental. Finalment, l'última part es tracta de la preparació d'un sistema multifuncional format completament per hidrogels. El capítol comença detallant la preparació d'un elèctrode d'un supercapacitor basat en un hidrogel de PEDOT i alginat. Després de la seva caracterització com a elèctrode, s'exploren les altres funcionalitats que se li poden donar a aquest sistema. Es prepara un sensor de pressió reutilitzable i reciclable que permet detectar canvis de pressió linealment i amb una gran sensibilitat, i també es prepara un sistema d'alliberament controlat de fàrmacs, concretament l'alliberament controlat mitjançant estímul elèctric de curcumina
Polimers i biopolimers
James, Hodari-Sadiki L. "Thermo-Responsive Polymers for Cell-Based Therapeutic Applications." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1416231680.
Повний текст джерелаLiu, Qingsheng. "Developing Ultralow-Fouling Multifunctional Polymers for Biomedical Applications." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1439840291.
Повний текст джерелаEccleston, Mark Edward. "Functional polymers for biomedical application : synthesis and applications." Thesis, Aston University, 1995. http://publications.aston.ac.uk/9591/.
Повний текст джерелаYassin, Zakiya. "Characterization of OSTE-based polymers for acoustofluidic applications." Thesis, KTH, Tillämpad fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209924.
Повний текст джерелаHaynes, Dahlia. "Novel lactide derived polymers ; syntheses, properties and applications." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1239896057/.
Повний текст джерелаMiyata, Mamoru. "Synthesis of novel organoboron polymers and their applications." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148876.
Повний текст джерелаERRAHALI, MINA. "Microporous polyaromatic polymers designed for gas storage applications." Doctoral thesis, Università del Piemonte Orientale, 2015. http://hdl.handle.net/11579/115581.
Повний текст джерелаINVERARDI, NICOLETTA. "3D Printed Shape Memory Polymers for Biomedical Applications." Doctoral thesis, Università degli studi di Brescia, 2021. http://hdl.handle.net/11379/544096.
Повний текст джерелаCheung, Wai-kei, and 張偉基. "Low band-gap donor-acceptor polymers and heterolyptic ruthenium complex containing polymers for photovoltaic applications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B47753006.
Повний текст джерелаpublished_or_final_version
Chemistry
Master
Master of Philosophy
Hughes-Brittain, Nanayaa Freda. "Photoembossing for biomedical applications." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8294.
Повний текст джерелаMellinger, Axel. "Charge storage in electret polymers mechanisms, characterization and applications /." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976642212.
Повний текст джерела