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Reflex Treatment of Transparent Materials
Meluzín, Ondřej ; Tulka, Jaromír (referee) ; Molliková, Eva (advisor)
This thesis deals with the possibilities and methods of coating of transparent materials in order to improve their optical-reflective properties. It describes various methods that nowadays coatings can be applied on an industrial scale, while maintaining a constant thickness and properties across the applied coating. Further provides specific examples of how the application of different optical coatings can improve the desired properties of materials used for technical applications.
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The Influence of Nanoparticles on The Properties of Hard Polyurethane Foams
Eliáš, Filip ; Kotlík, Josef (referee) ; Petrůj, Jaroslav (advisor)
The theoretical part of the thesis focuses on general principles of polyurethane chemistry. Nanotechnologies are also discussed, in particular using nanoparticles in the production of polyurethane foams. There are also mentioned selected preparation methods of silver and titanium dioxide nanoparticles. The experimental part describes mainly a novel method for synthesis of the concentrated solution of titanium dioxide nanoparticles in glycerol and their analysis by using confocal microscopy, scanning electron microscopy, dynamic light scattering and UV-VIS spectroscopy. Finally, there are suggested particular steps for further investigation of prepared nanoparticles for the production of rigid polyurethane foams, and also for other applications.
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Polymeric nanocomposites - preparation methods
Černý, Miroslav ; Žídek, Jan (referee) ; Kučera, František (advisor)
Literature search of bachelor thesis was focused to methods of CaCO3 nanoparticles preparation, surface modification and PS/CaCO3 nanocomposites processing. Experimental part was based on two methods of PS/CaCO3 nanocomposites preparation: emulsion and bulk technique of styrene radical polymerization in presence of CaCO3 and by compounding CaCO3 with PS in Brabender mixer at 220 °C. Prepared samples were observed using electron microscope.
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Compaction of ceramic nanoparticle suspensions by centrifugal forces
Mišák, Jiří ; Maca, Karel (referee) ; Trunec, Martin (advisor)
In bachelor’s thesis, there was researched compacting of ceramic suspensions prepared from aluminium oxide with particle size of 100 nm by centrifugal forces. The homogeneity of centrifuged bodies was described in dependence of the speed of centrifugation. It was shown, that homogenous plate samples with regular particle packing could be prepared from centrifuged bodies. The structure and sintering behaviour of such bodies were superior to samples prepared by cold isostatic pressing. Similar properties could be reached in samples prepared from suspension with high loading (47,5 vol.%) as well as with lower loading (20 vol.%). The advantage of regular and dense particle packing by centrifugal compaction was demonstrated by manufacturing of transparent ceramic samples.
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Bioceramic Materials and Their Biocopatibility with Bone Tissues
Novotná, Lenka ; Trunec, Martin (referee) ; Cihlář, Jaroslav (advisor)
The thesis concerns the study of ceramic coatings of zirconia nanoparticles deposited on alumina, zirconia and glass substrates by ultrasonic spraying. The quality of deposits was investigated in dependence on the type of substrate (composition, temperature, roughness) and concentration of ceramic suspension. The best results were received by the deposition of suspension of low concentration on rough substrates at low temperatures. The biocompatibility was tested in vitro. Good cytocompatibility of ceramics with nanostructure coatings was found.
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High-grade concrete using nanoparticles
Labaj, Martin ; Bodnárová, Lenka (referee) ; Hela, Rudolf (advisor)
The aim of this paper is to summarize and assess the possibility of using nanoparticles as additives in high performance concrete. These particles have the ability to improve the mechanical and physical properties of cement composites or even gave them brand new ones. Industrial use, however, is hampered by several obstacles. In particular, it is the task of effective incorporation of nanoparticles into the matrix, the health and environmental risks and, last but not least, the financial costs. The experimental part of the work deals with the first-mentioned problem, namely with dispersing carbon nanotubes in aqueous solution and their subsequent integration into the structure of cement mortar.
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Titanium oxide and its properties in building materials
Rypák, Peter ; Vyšvařil, Martin (referee) ; Rovnaník, Pavel (advisor)
Theoretical part of thesis deals with conclusion of aquired informations about photocatalysis of titanium dioxide, its influence on properties of chosen building materials and its practic use in research of building materials with abitlity to decompose organic and anorganic matters. Experimental part deals with influence of quantity of titanium dioxide on mechanical strength of tested samples based on alkali activated slag and its ability to decompose organic colorant Rhodamine B
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Potential risks of nano-particle materials utilization
Flimelová, Miroslava ; Šmejkalová, Daniela (referee) ; Kučerík, Jiří (advisor)
The thesis „Potential risks of nano-particle materials utilization“ summarizes scientific knowledge on nanotechnology, nano-particle and nano-chemistry. The aim of the work is the literature overview on potential problems associated with their utilization. Thesis is focused particularly on nanoparticles exploitation and limits connected with their understanding and prediction of their fate in the environment. The impact of nanotechnology on the society and every-day life is discussed with respect to various risk sources.
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Změna barvy povrchu modifikovaného dubového dřeva působením umělého slunečního záření
Rozboril, Tadeáš
This bachelor thesis conducted as an experiment is concerned by the color change of modified oak wood surface affected by artificial sun light. Part of the thesis is also focused on influence of chosen modification to the color change of oak wood surface. Samples of oak wood for experiment were modified by ammonia and by iron nanoparticles. Both modifications darken the surface of samples. Color change by the artificial sun light was measured on modified oak samples, also on subfossil and natural oak wood. The dry regime caused darkening of untreated oak, and whitening of all other samples. The wet regime caused whitening of all samples, however smallest color change was measured on samples modified by nano-iron.
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The new nanoparticles in the ultastructural diagnostics
MARTYKÁNOVÁ, Denisa
The aim of this master thesis is to focus on a various methods of the conjugation of palladium nanoparticles of different shapes on the protein. The main point was to use both covalent and non-covalent conjugation of palladium nanoparticles on the protein and to use the functional conjugates to find out their stability in time.
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