Dissertations / Theses on the topic 'Mesostructured'
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Zürner, Andreas. "New Methods Visualizing Mesostructured Materials." Diss., lmu, 2011. http://nbn-resolving.de/urn:nbn:de:bvb:19-138428.
Full textAndersson, Nina. "Mesostructured materials : Synthesis towards applications /." Stockholm : Department of Physical, Inorganic and Structural Chemistry, Stockholm university, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-6584.
Full textLiong, Monty. "Biomedical applications of mesostructured silica materials." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1905693461&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Full textPatel, Jiten. "Optimal design of mesostructured materials under uncertainty." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31829.
Full textCommittee Chair: Choi, Seung-Kyum; Committee Member: Muhanna, Rafi; Committee Member: Rosen, David. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Biz, Sophie. "Synthesis and characterization of mesostructured molecular sieves." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17920.
Full textYang, Bin. "Surfactant and polyelectrolytes templated mesostructured inorganic materials." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528113.
Full textKimura, Tatsuo. "Synthesis of novel mesostructured and mesoporous materials /." Electronic version of summary, 1999. http://www.wul.waseda.ac.jp/gakui/gaiyo/2729.pdf.
Full textVogel, Robert. "Dye doped mesostructured materials for optical device applications /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17360.pdf.
Full textTiemann, Michael. "Mesostructured aluminium phosphates synthesised by supramolecular structure direction." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963107097.
Full textKirstein, Johanna. "Diffusion of single molecules in nanoporous mesostructured materials." Diss., lmu, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-79478.
Full textXu, Shiyu. "Characterisation of mesostructured films and single zeolite nanosheets." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-mesostructured-films-and-single-zeolite-nanosheets(2a2a1047-bf17-49c1-b711-120e98ac4cf2).html.
Full textNagamine, Shinsuke. "Synthesis of Mesostructured Solids Templated by Surfactant Micellar Structure." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150278.
Full textKhimyak, Yaroslav Zenonovych. "Synthesis and characterisation of novel mesostructured and mesoporous solids." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621782.
Full textPark, In. "Mesostructured silica for the reinforcement of thermoset epoxy polymers." Diss., Connect to online resource - MSU authorized users, 2006.
Find full textZürner, Andreas [Verfasser], and Thomas [Akademischer Betreuer] Bein. "New Methods Visualizing Mesostructured Materials / Andreas Zürner. Betreuer: Thomas Bein." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2011. http://d-nb.info/1018847278/34.
Full textHawley, Adrian Marcus. "Surfactant templated mesostructured titania films : a comparison of three methods." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512325.
Full textAkpe, Victor. "Controlled, self-assembly of silica nanoparticles into uniform mesostructured glass." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17565.
Full textCorrales, Tomas P. [Verfasser]. "Local dynamics and bending mechanics of mesostructured materials / Tomas P. Corrales." Mainz : Universitätsbibliothek Mainz, 2013. http://d-nb.info/1045264318/34.
Full textDocampo, Pablo. "Electronic properties of mesostructured metal oxides in dye-sensitized solar cells." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:e97e90f9-47fe-4259-a462-c97f0bf81469.
Full textSörensen, Malin Helena. "Mesostructured particulate silica materials with tunable pore size : Synthesis, characterization and applications." Doctoral thesis, KTH, Ytkemi (stängd 20081231), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10089.
Full textQC 20100811
Kim, Jee Yun. "Data-driven Methods in Mechanical Model Calibration and Prediction for Mesostructured Materials." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85210.
Full textMaster of Science
A material system obtained by applying a pattern of multiple materials has proven its adaptability to complex practical conditions. The layer by layer manufacturing process of additive manufacturing can allow for this type of design because of its control over where material can be deposited. This possibility then raises the question of how a multi-material system can be optimized in its design for a given application. In this research, we focus mainly on the problem of accurately predicting the response of the material when subjected to stimuli. Conventionally, simulations aided by finite element analysis (FEA) were relied upon for prediction, however it also presents many issues such as long run times and uncertainty in context-specific inputs of the simulation. We instead have adopted a framework using advanced statistical methodology able to combine both experimental and simulation data to significantly reduce run times as well as quantify the various uncertainties associated with running simulations.
Sörensen, Malin Helena. "Mesostructured particulate silica materials with tunable pore size : synthesis, characterization and applications /." Stockholm : Skolan för kemivetenskap, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10089.
Full textKustra, Joanna. "Elaboration of micro and mesostructured sol-gel materials using polysilsesquioxane molecular precursors." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1081/document.
Full textThe main goal of this research was the synthesis of new siliceous materials with controlled microstructures, using low-temperature polycondensation process, and develop the new approach towards 3D microfabrication under two-photon excitation of a sol-gel formulation. Synthesis of microstructured materials is based on the sol-gel process, i.e. hydrolytic polycondensation. Most known siliceous materials with controlled microstructure are synthesized from tetraethoxysilane (TEOS). The materials are generally structured by structuring molecular agents ("templates") such as surfactant compounds, which are then removed by heat treatment or washing with appropriate solvents. This stage of removal of structuring agents is often problematic, particularly at the industrial level, because it uses either high temperatures or large amounts of solvents. Therefore, new methods to obtain materials with controlled porosity without the need to use templates are still being developed. Two strategies are discussed during this research work. First one involved the use of organosilicon precursors with a define structure that at molecular level modify the structure of the final materials. The use of well-defined precursors (silsesquioxanes), in appropriate proportions, allows the control of the porosity of the obtained silica materials. The second approach investigated in this work is the local photo-induced structuration of silicon based pre-hydrolyzed precursors under two-photon excitation allowing high 3D resolution
CARA, CLAUDIO. "Siliceous and non-siliceous mesostructured iron oxide nanocomposites for H2S removal from syngas." Doctoral thesis, Università degli Studi di Cagliari, 2018. http://hdl.handle.net/11584/255985.
Full textHoldaway, James. "A study of the structure and formation of biocompatible mesostructured polymer- surfactant hydrogel films." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648942.
Full textMUREDDU, MAURO. "Mesostructured metal oxide-based nanocomposites as sorbents for H2S removal from syngas coal gasification." Doctoral thesis, Università degli Studi di Cagliari, 2015. http://hdl.handle.net/11584/266555.
Full textZhang, Kun. "Mesostructured porous materials : Pore and surface engineering towards bio-inspired synthesis of heterogeneous copper catalysts." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2008. http://tel.archives-ouvertes.fr/tel-00310153.
Full textSchöbel, Judith [Verfasser], and Andreas [Akademischer Betreuer] Greiner. "Block Copolymer Micelles as Efficient Templates for Mesostructured Hybrid Materials / Judith Schöbel ; Betreuer: Andreas Greiner." Bayreuth : Universität Bayreuth, 2018. http://d-nb.info/115963310X/34.
Full textArcher, Jared Rausch. "Synthesis, characterization, and application of thin films and mesostructured materials using self-assembled surfactant templates." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1111694248.
Full textArcher, Jared Rausch. "Synthesis, characterization, and application of thin films and mesostructured materials using self-asssembled surfactant templates." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1111694248.
Full textTitle from first page of PDF file. Document formatted into pages; contains xvi, 161 p.; also includes graphics (some col.). Includes bibliographical references (p. 155-161). Available online via OhioLINK's ETD Center
Crosman, George Adrian. "Immobilization of Rh-diphosphine complexes on mesostructured materials and their application to asymmetric hydrogenation and hydroboration." Aachen Shaker, 2009. http://d-nb.info/999464981/04.
Full textZhou, Wen-Juan. "Polyamine and Schiff base metal complexes incorporated in mesostructured templated porous silicas : tentative application in selective oxidation." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2009. http://tel.archives-ouvertes.fr/tel-00533599.
Full textCrosman, George A. [Verfasser]. "Immobilization of Rh-diphosphine complexes on mesostructured materials and their application to asymmetric hydrogenation and hydroboration / George A Crosman." Aachen : Shaker, 2009. http://d-nb.info/1124365893/34.
Full textPark, Seok Chan. "Single molecule tracking studies of flow-aligned mesoporous silica monoliths: pore order and pore wall permeability." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/35731.
Full textDepartment of Chemistry
Daniel A. Higgins
This dissertation describes single-molecule tracking (SMT) studies for the quantitative characterization of one-dimensional (1D) nanostructures in surfactant-templated mesoporous silica monoliths prepared within microfluidic channels. Single molecule diffusion of fluorescent probe molecules within the cylindrical mesopores reflects microscopic morphologies and mass-transport properties of the materials with high temporal and spatial resolution. The pore organization and materials order are initially investigated as a function of sol aging prior to loading into the microfluidic channels. Mesopores in these materials are templated by Cetyltrimethylammonium bromide (CTAB). Wide-field fluorescence videos depict 1D motion of the dyes within the individual mesopores. Orthogonal regression analysis of these motions provides a measure of the mesopore orientation. Channels filled prior to gelation of the sol produce monoliths incorporating large monodomains with highly aligned mesopores. In contrast, channels filled close to or after gelation yield monoliths with misaligned pores that are also more disordered. Two-dimensional (2D) small angle X-ray scattering (SAXS) experiments support the results obtained by SMT. These studies help to identify conditions under which highly aligned mesoporous monoliths can be obtained and also demonstrate the utility of SMT for characterization of mesopore order. The non-ionic surfactant Pluronic F127 is also utilized as the structural-directing agent. The diffusive motions of PDI dyes that are uncharged, cationic and anionic are explored by SMT and fluorescence correlation spectroscopy (FCS). The SMT studies for the uncharged dye show development of 1D diffusion along the flow direction while charged dyes exhibit predominant isotropic diffusion, with each of these behaviors becoming more prevalent as a function of aging time after filling of the microfluidic channels. SMT studies from silica-free F127 gels suggest that partitioning plays a important role in governing the diffusion behavior of the PDI dyes within the surfactant-filled mesopores. FCS results exhibit similar mean diffusion coefficients for all three dyes that suggest these dyes diffuse through similar sample regions. These studies demonstrate that the silica pore walls in the mesoporous silica monoliths remain permeable after gelation and that partitioning of solute species to different regions within the pores plays an important role in restricting the dimensionality of their diffusive motion
Costacurta, Stefano. "Mesoporous films obtained by supramolecular self-assembly and their characterisation by advanced techniques." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425017.
Full textAlvarado, Perea Leo [Verfasser], Andreas [Akademischer Betreuer] Seidel-Morgenstern, and Franziska [Akademischer Betreuer] Scheffler. "Direct conversion of ethene to propene on Ni-alumino-mesostructured catalysts : synthesis, characterization and catalytic testing / Leo Alvarado Perea. Betreuer: Andreas Seidel-Morgenstern ; Franziska Scheffler." Magdeburg : Universitätsbibliothek, 2014. http://d-nb.info/1054638403/34.
Full textAlvarado, Perea Leo [Verfasser], Andreas Akademischer Betreuer] Seidel-Morgenstern, and Franziska [Akademischer Betreuer] [Scheffler. "Direct conversion of ethene to propene on Ni-alumino-mesostructured catalysts : synthesis, characterization and catalytic testing / Leo Alvarado Perea. Betreuer: Andreas Seidel-Morgenstern ; Franziska Scheffler." Magdeburg : Universitätsbibliothek, 2014. http://d-nb.info/1054638403/34.
Full textBaffert, Mathieu. "Synthesis of ruthenium complexes having one or more N-heterocyclic carbene ligands supported on hybrid mesostructured silicas and their use in the hydrogenation of carbon dioxide." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00838661.
Full textAdeyeye, Adekunle Olusola. "Magnetic mesostructures." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627615.
Full textNykl, Scott L. "Interactive Mesostructures." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1382459151.
Full textLopes, Silva Susana. "Développement de nouveaux catalyseurs d'hydrotraitement basés sur l'encapsulation d'hétéropolyoxometallates dans des silices mésostructurées : application à la production de carburants propres." Thesis, Lyon, École normale supérieure, 2013. http://www.theses.fr/2013ENSL0799/document.
Full textEconomic growth in the developing countries over the past decade has increased the global demand for crude oil. It is projected that the global crude slate will become sourer, with a sulfur content above 1.3 wt%. An overall aim of policymakers is thus to ensure that transportation fuels do not surpass a sulfur content of 10 ppm. Several solutions are possible to achieve the nowadays goals, that affect either the process or the catalyst. The latter solution, which does not involve significant additional costs for refiners, is therefore the most studied. One way to improve the nowadays catalysts would be to increase the content of active metal (eg cobalt and molybdenum in the case of CoMo systems). Nevertheless, at higher metal loadings, the formation of refractory species such as CoMoO4 or Co3O4 by sintering during calcination and/or sulfidation steps has been reported for alumina-Supported catalysts. This PhD project is based on the development of new hydrotreating catalysts, through a 2-Step one-Pot method : synthesis of polyoxometalates-Containing mesoporous SBA-15 materials, followed by incipient wetness impregnation of active phase promoter. The encapsulation of these species within the silica matrix would prevent the agglomeration of large particles during sulfidation reactions and could thus lead to systems with high content of active metal well dispersed over the support. One aim of this study was to evaluate the potential of these catalysts in the hydrotreating of several feedstocks, such as diesel oil, gasoline or vegetal oil. A second objective was the understanding of the nature of the different interactions between the active phase precursors and the support, according to each preparation technique.The non-Promoted hybrid catalyst showed a better dispersion of the metallic phase in the oxide state, compared to the catalysts prepared by incipient wetness impregnation, which can be correlated with stronger interactions between encapsulated POM and silica functionalities, such as siloxanes and silanols, as evidenced by Raman spectroscopy. However, the wide-Angle XRD showed the presence of MoO3 crystallites. HRTEM analyzes of the sulfided catalysts showed different species on this catalyst: small MoS2 slabs and metal particles (∼ 1 nm) mainly in the walls but also on the surface of pores; curved MoS2 slabs at mesopores surface leaving the entrance of the pore free; MoS2 hanks blocking the pores.This catalyst showed a relatively low sulfidation rate (determined by XPS), which could be associated with the presence of refractory species already present before activation. Thus, the toluene conversion represented per MoS2 clearly showed the interest of the catalyst prepared by this innovative method, presenting an intrinsic activity two-Fold higher than that of the catalyst prepared by dry impregnation.The subsequent impregnation of the active phase promoter of the hybrid catalyst (Pr(NO3)2, Pr = Ni or Co; 4
Perrot, Alexandre. "Revêtements sol-gel incorporant des particules mésostructurées actives élaborées par aérosol pour la protection contre la corrosion des alliages d’aluminium aéronautiques." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066744.
Full textThe aim of this PhD is to replace anticorrosion protection coatings containing carcinogenic hexavalent chromium by hybrid sol-gel films containing active aerosol particles. Our protection strategy is to incorporate aerosol particles loaded with corrosion inhibitors within a mesostructured hybrid layer on top of the substrate, covered by a hybrid barrier top layer. This layer’s goal is to prevent chemical species associated with corrosion initiation (Cl- et H2O) to diffuse to the alloy thus providing a passive protection. In case of film cracking aerosol particles release their corrosion inhibitors which can diffuse through the mesostructure of the film to corrosion sites where they form a passive insoluble film which stops corrosion reactions thus providing an active protection. Spatial separation between those two different actions allows us to overcome the necessary compromise found in reference corrosion protection systems between inhibitor diffusion and barrier effect thus maximizing anticorrosion efficiency. Aerosol mesostructured particles were obtained by spray drying using different catalysts. They were later charged with two organic corrosion inhibitors 8-HQ and BTA with variable loadings. Loaded particles were then incorporated within different sol-gel films in order to demonstrate their active effect on corrosion. Anticorrosion efficiency of those different materials was evaluated through electrochemical impedance spectroscopy and salt spray test
Harvey, Michael D. "Hybrid material systems for micro-optical devices : the synthesis and characterisation of dye doped mesostructured TiO2, low refractive index mesoporous SiO2 and the analysis of thin films made thereof /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19323.pdf.
Full textMueller, Andre. "Designer 3D magnetic mesostructures." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558883.
Full textAlabi, Akinleye Christopher Grubbs Robert H. Davis Mark E. "I. Synthesis and proton conductivity studies of mesostructured organosilicates and bitriazole-polymer composites ; II. Targeted nanoparticles for siRNA delivery /cChristopher Akinleye Alabi ; Robert H. Grubbs, committee chair ; Mark E. Davis, advisor." Diss., Pasadena, Calif. : California Institute of Technology, 2009. http://resolver.caltech.edu/CaltechETD:etd-05262009-145437.
Full textNykl, Erik L. "Point Cloud Mesostructure Impostors." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou151214093467185.
Full textFaul, C. F. J. (Charles Frederick James). "Directed synthesis of polymer mesostructures." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51729.
Full textENGLISH ABSTRACT: The objective of this research was to produce discrete, nano-shaped polymeric structures on the same length scale as, or one to one copies of, templates, deformable templates or structure-directing hosts. Polymerisation of hydrophobic organic monomers in high concentration surfactant solutions, leads to the formation of shaped particles (rod-like, plank-like and ribbon-like particles) in the micrometer size range. The origin of these regularly shaped particles was investigated. It is proposed that they were not polymeric in nature, but formed by the crystallisation of the surfactant in the presence of electrolytes and ethanol as solvent. The polymeric particles that were formed were found to be of spherical shape, and no directing of the shape was detected. Mesostructured hosts were then investigated for their possible use as structure-directing agents. A series of polyelectrolyte-surfactant complexes of polydiallylammonium chloride with sodium sulphate surfactants (ranging from C10 to C16) were synthesised and characterised in terms of their thermal, mechanical and structural properties. The complex of polydiallylammonium chloride and sodium dodecyl sulphate was selected as an appropriate self-assembled model system for investigations into the structure-directing properties of these new materials. The polymerisation of hydrophobic organic monomers, such as styrene and the di-functional monomer m-diisopropenylbenzene (m-DIB), within the above mesoscopically structured polyelectrolyte-surfactant complex as host, lead to the formation of unconventionally shaped polymeric particles. The influence of the presence of monomers and guest polymers on the phase morphology of the host was investigated by small angle X-ray analyses (SAXS) and dynamic mechanical analyses (DMA). SAXS analyses showed that these new, stable hosts can hold up to 17 % guest polymer before phase disruption is encountered. These findings were supported by changes in the mechanical properties, as determined by DMA. The transmission electron microscopy (TEM) images of particles obtained after polymerisation showed very clearly that the poly-(m-DIB) did not form a continuous copy of the 3D hexagonal structure of the host, but rather colloidal copies of a part of the host structure that swelled the most. The shapes of the polymer mesostructures were dictated by the morphology of the phase of the structure-directing host, to produce nanosized wires (dimensions 4 by 100 nm), cigar-shaped particles (dimensions 8 by 50 nm) and fibrillar bent shapes (larger than 200 nm), as revealed by TEM. According to literature these are the first shaped, polymer nano-particles produced in a soft, selfassembled, organic templating host.
AFRIKAANSE OPSOMMING: Die doel van hierdie navorsing was om diskrete, nano-gevormde polimeriese partikels van dieselfde lengteskaal as, of direkte een tot een kopië van, 'n templaat, 'n vervormbare of struktuur-rigtende gasheersisteem te produseer. Die polimerisasie van hidrofobiese organiese monomere in seep oplossings van hoë konsentrasie, het gelei tot die produksie van gevormde partikels. Die oorsprong van hierdie partikels is ondersoek. Dit word voorgestel dat die partikels nie polimeries van aard is nie, maar gevorm is deur die kristallisasie van die seep in die teenwoordigheid van elekotroliete en etanol as oplosmiddel. Die polimeriese partikels wat wel geproduseer is, was sferies in vorm, en geen rigtende invloed op die vorm van die partikels is waargeneem nie. Meso-gestruktureerde gasheersisteme is ook ondersoek vir moontlike gebruik as struktuur-rigtende agente. 'n Reeks poliëlektroliet-seep komplekse van polidiallielammoniumchloried en natriumsulfaat sepe (van C10 tot C16) is gesintetiseer en gekarakteriseer in terme van hul termiese, meganiese en strukturele eienskappe. Die kompleks van polidiallielammoniumchloried en natrium dodekielsulfaat is gekies as 'n toepaslike self-organiserende modelsisteem vir die ondersoeke na die struktuur-rigtende eienskappe van hierdie nuwe materiale. Polimerisasie van hidrofobiese organiese monomere, soos byvoorbeeld stireen en die di-funksionele monomeer m-di-isopropenielbenseen (m-DIB), in hierdie mesoskopies-gestruktureerde poliëlektroliet-seep kompleks, het gelei tot die vorming van nie-konvensionele gevormde polimeriese partikels. Die invloed van die teenwoordigheid van monomere en gaspolimere op die fasemorfologie van die gasheersisteem is ondersoek d.m.v. kleinhoek X-straal diffraksie (Eng. SAXS) en dinamiese meganiese analise (DMA). SAXS analises het aangetoon dat hierdie nuwe, stabiele gasheersisteem tot 17 % gaspolimeer kan inkorporeer voordat fasevernietiging plaasvind. Hierdie resultate is verder ondersteun deur veranderinge in die meganiese eienskappe soos waargeneem deur DMA. Transmissie elektronmikroskopie (TEM) afbeeldinge van partikels geïsoleer na polimerisasie het baie duidelik gewys dat, in die geval van poli-(m-DIB), die gaspolimeer nie 'n kontinue kopie van die drie dimensionele heksagonale struktuur van die gasheersisteem produseer nie. Daar word eerder 'kolloïdale kopieë' van dele van die gasheersisteem wat die meeste swel gevorm. Die vorms van die polimeer mesostrukture word dus bepaal deur die morfologie van die fase van die struktuur-rigtende gasheer, om nanogrootte draadjies (dimensies 4 x 100 nm), sigaarvormige partikels (8 x 50 nm) en fibrillêre gebuigde vorms (groter as 200 nm) te vorm, soos waargeneem met TEM. Volgens die literatuur is hierdie die eerste geval van gevormde polimeer nanopartikels geproduseer in 'n self-organiserende templaat gasheersisteem.
Ho, Christopher Sui-keung. "Mesostructure quantification of fibre-reinforced composites." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0017/MQ49722.pdf.
Full textEngbarth, Miles. "Hall magnetometry of electrodeposited superconducting Pb mesostructures." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520543.
Full textSilva, Luis Carlos Cides da. "Síntese de sílica mesoestruturada empregando tratamento hidrotérmico em forno de microondas." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-23022018-174331/.
Full textHighly ordered, thermally and hidrotermally stable, with large pore size of 12 nm, caged-like cubic mesoporous silica structures (originally denoted FDU-1) were synthesized from TEOS and poly(ethylene oxide)-poly(butylene oxide)poly(ethylene oxide) B50-6600 triblock copolymer template (EO39BO47EO39) under acidic conditions.The synthesis procedure was developed using microwave oven for hydrothermal treatment to obtain FDU-1 silica. After hydrothermal treatment, the samples were calcined to 540 ºC, in two stages, using N2 and air atmospheres. The materials characterized by elementary analysis, FTIR, TG, DRX and nitrogen adsorption isothermal at 77 K. The data association of SAXS and the nitrogen adsorption isothermal demonstrated that the material isolated with 45 and 60 minutes of the exposition to the microwaves in the hydrothermal treatment showed testure properties compatible to that one of material obtained by the conventional method. Thermogravimetric experiments evidenced the temperature range where occur copolymer thermal decomposition according to the synthesis, as synthesized materials. This information was important to optimize the material calcination conditions. The TG/DTG curves indicated that, in the material heated up to 1200 ºC, occurs complete transformation of silanol in to siloxane groups with water elimination. This fact is confirmed through the IR spectra and enabled to calculate the quantity of the Si-OH groups in the material surface which vary hydrothermal treatment time in the syntesis stage.