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Plazmové opracování porézních povrchů
Vaidulych, Mykhailo ; Hanuš, Jan (advisor) ; Pavlík, Jaroslav (referee) ; Tichý, Milan (referee)
Title: Plasma treatment of porous structures Author: Mykhailo Vaidulych Department / Institute: Department of Macromolecular Physics Supervisor of the doctoral thesis: Prof. Assist. Jan Hanuš, Ph.D., Department of Macromolecular Physics Abstract: The thesis is focused on the implementation of low-temperature plasma for the modification of porous materials. Two main strategies are involved: functionalization through the deposition of functional nanocomposite coatings and low-pressure plasma etching. In the first case, a gas-phase step-by-step deposition process based on the combination of deposition of nanoparticles and thin films was developed to obtain super-wettable nanocomposite coatings on filtration membranes. It was shown that the deposition parameters of thin films and particles of plasma polymer can tune the wetting characteristic of the membranes whereas embedding copper nanoparticles endows them with antibacterial properties. As a result, highly efficient superhydrophobic/superoleophilic and smart superamphiphilic membranes were successfully fabricated for oil/water separation. Plasma processing in the atmosphere of argon, oxygen or nitrogen was utilized to modify hard metal/polymer nanocomposites (Ag/a-C:H) with potential to be used as functional coatings for bone implants. An anisotropic etching...
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Plasma modification of materials for medical purposes
MATĚJÍČEK, Jan
This diploma thesis deals with the ongoing research under the auspices of the Department of Applied Physics and Technics Faculty of Education, University of South Bohemia in České Budějovice, in which the author of the work was actively participated. The thesis is divided into theoretical and experimental part. The theoretical part contains information from natural polymers, especially cellulose, plasma technology and infrared spectrometry. The subject of the experimental part of the thesis is research that deals with the functionalization of cellulose using a microwave plasma discharge on the apparatus CX-22. In the present research was also conducted to process optimization of functionalization with the liquid precursor hexamethyldisiloxane (HMDSO).
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Plasma modification of powder materials
ČERNÝ, Pavel
Thesis is focused on plasma modification of materials. The work has the character of a search of available literature, especially the papers presented in impacted journals. The aim is to provide a broader overview of the subject. The first section describes the most commonly modified powdered materials. The second part is focused on the plasma modification, the reasons for its use, capabilities and benefits respectively and disadvantages of these processes. The following sections are devoted to plasma discharges, plasma reactors, aspects of plasma modification and companies engaged in production, or modification of powders. Each chapter is intended to provide an overview of the modified powder materials, processes within the plasma discharges, construction and use of plasma reactors, plasma modification of aspects and the market situation in the context of powdered materials and companies dealing with the plasma modification.
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