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Air conditioning in the library
Pospíšilová, Lucie ; Uher, Pavel (referee) ; Blasinski, Petr (advisor)
Dissertation offers a plan for air – conditioning equipment of library building in Brno and it involves air filter experimental measurement. The proposal is divided into three parts. The first part explains air filter theory with detailed description of atmospheric air filters for separation of particles for general ventilation - filter parameter determination. Theory part ends specifically with pocket air filters and their construction. The second part focuses on experimental pocket air filter measurement execution, which calculates with variable filter cartridges and pocket count. Measurement also evaluates pressure drop and their efficiency. The last part of the dissertation looks at air – conditioning equipment design for specified building, concretely library building. The project solves fresh air traffic into interior of selected library rooms and it counts with thermal heat gain in summer season, heat loss in winter season and air humidity modification.
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Application of nanofillers into thermoplastics
Žák, Luboš ; Žídek, Jan (referee) ; Kučera, František (advisor)
Bachelor thesis is focused on the search of the state of knowledge in the preparation, properties and applications of nanocomposites with thermoplastics polymer matrix and different types of nanofillers in theoretical part. Methods for the preparation of nanocomposites and techniques used for their characterization are clearly describes. The first method for preparing nanocomposites is an application of nanofiller to the polymer solution with subsequent removal of the solvent. The second method is the dispersion polymerization of nanofiller in the monomer. The last one is the application of nanofiller in the dispersion of ethanol into the polymer melt. The experimental part deals with the preparation of foils for characterization of rheological properties of nanocomposites at first. Polystyrene was polymer matrix and selected nanofillers was applied to the polymer solution and then it was removed the solvent. The second method was the preparation of nanocomposites dispersion polymerization of nanofillers in the monomer. The method in-situ preparation of nanocomposite is based on the thermal initiated polymerisation of styrene in the dispersion of nanofillers with the selected type radical initiator. The third proposed method was the application of ethanol dispersion of fillers into the polymer melt in the Brabender mixer.
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Influence of nanoparticles on the properties of electroinsulating materials
Sedláček, Michal ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This work deals with influence nanoparticles, as fillers of polymer, to electrical properties dielectric composite materials. Addition of just a few weight percent of nonofillers has profound impact on the physical, chemical, mechanical and electrical properties orf polymer. Simultaneously is focused on production and diagnostics by the relaxation spectroscopy and measure internal resistance. Examination material is epoxy resin TSA 220S filled Al2O3 and SiO2 nanoparticles.
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Preparation of Epoxy Based Insulating Materials Filled by Nanoparticles
Mockovčiak, Kristian ; Čech, Ondřej (referee) ; Chladil, Ladislav (advisor)
The present thesis deals with the preparation of epoxy insulating materials filled with nanoparticles and its electrical properties. Experimental samples are made of epoxy resin as a matrix and titanium dioxide nanoparticles (TiO2) as nanofillers in 0.5, 1 and 3 percent filling. Temperature dependencies of internal resistivity, relative permittivity and loss factor are measured on nanocomposite samples. The influence of the filler on the resulting electrical properties of the polymer used is discussed.
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Influence of High Concentration of Silica Nanoparticles on the Dielectric Spectra
Soud, Ammar Al ; Daradkeh, Samer ; Knápek, Alexandr ; Liedermann, Karel ; Holcman, Vladimír ; Sobola, Dinara
In the presented work, we report the dielectricbehavior of epoxy–silicon oxide composites in the temperaturerange 240– 300 K, over the frequency range 10-2 Hz – 107 Hz. Themeasuring apparatus was based on the Novocontrol AlphaAnalyser and the measured data were analyzed and interpretedusing the Havriliak – Negami equation. The master curves of thereal part of permittivity and the dielectric loss number wereobtained by time–temperature superposition principle, and theresults showed that the nano-composite had a much higher lossfactor. Through the analysis of the origin of the dielectric responsein epoxy/silica composite, the reason for the different dielectricrelaxation behaviors of the nano-composite, and the pure epoxywas discussed.
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Preparation of Epoxy Based Insulating Materials Filled by Nanoparticles
Mockovčiak, Kristian ; Čech, Ondřej (referee) ; Chladil, Ladislav (advisor)
The present thesis deals with the preparation of epoxy insulating materials filled with nanoparticles and its electrical properties. Experimental samples are made of epoxy resin as a matrix and titanium dioxide nanoparticles (TiO2) as nanofillers in 0.5, 1 and 3 percent filling. Temperature dependencies of internal resistivity, relative permittivity and loss factor are measured on nanocomposite samples. The influence of the filler on the resulting electrical properties of the polymer used is discussed.
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Air conditioning in the library
Pospíšilová, Lucie ; Uher, Pavel (referee) ; Blasinski, Petr (advisor)
Dissertation offers a plan for air – conditioning equipment of library building in Brno and it involves air filter experimental measurement. The proposal is divided into three parts. The first part explains air filter theory with detailed description of atmospheric air filters for separation of particles for general ventilation - filter parameter determination. Theory part ends specifically with pocket air filters and their construction. The second part focuses on experimental pocket air filter measurement execution, which calculates with variable filter cartridges and pocket count. Measurement also evaluates pressure drop and their efficiency. The last part of the dissertation looks at air – conditioning equipment design for specified building, concretely library building. The project solves fresh air traffic into interior of selected library rooms and it counts with thermal heat gain in summer season, heat loss in winter season and air humidity modification.
|
|
|
Influence of nanoparticles on the properties of electroinsulating materials
Sedláček, Michal ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This work deals with influence nanoparticles, as fillers of polymer, to electrical properties dielectric composite materials. Addition of just a few weight percent of nonofillers has profound impact on the physical, chemical, mechanical and electrical properties orf polymer. Simultaneously is focused on production and diagnostics by the relaxation spectroscopy and measure internal resistance. Examination material is epoxy resin TSA 220S filled Al2O3 and SiO2 nanoparticles.
|
|
|
Application of nanofillers into thermoplastics
Žák, Luboš ; Žídek, Jan (referee) ; Kučera, František (advisor)
Bachelor thesis is focused on the search of the state of knowledge in the preparation, properties and applications of nanocomposites with thermoplastics polymer matrix and different types of nanofillers in theoretical part. Methods for the preparation of nanocomposites and techniques used for their characterization are clearly describes. The first method for preparing nanocomposites is an application of nanofiller to the polymer solution with subsequent removal of the solvent. The second method is the dispersion polymerization of nanofiller in the monomer. The last one is the application of nanofiller in the dispersion of ethanol into the polymer melt. The experimental part deals with the preparation of foils for characterization of rheological properties of nanocomposites at first. Polystyrene was polymer matrix and selected nanofillers was applied to the polymer solution and then it was removed the solvent. The second method was the preparation of nanocomposites dispersion polymerization of nanofillers in the monomer. The method in-situ preparation of nanocomposite is based on the thermal initiated polymerisation of styrene in the dispersion of nanofillers with the selected type radical initiator. The third proposed method was the application of ethanol dispersion of fillers into the polymer melt in the Brabender mixer.
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