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Vliv teploty lepidla a povrchu adherendu na hloubku penetrace lepidla do masivního dřeva
Voldřichová, Anna
The final thesis deals with the influence of different gluing conditions on the depth of penetration of the adhesive into the surface of solid wood, specifically of the influence of increased pressure during pressing. Furthermore, the thesis investigates the effect of penetration on the strength of the glued joint under tensile loading. Specimens of spruce and oak wood were glued with UF glue and PVAC glue, pressed under different compression pressures and then subjected to tensile test. SEM analysis on an electron microscope was used to evaluate the depth of penetration. The results of the investigation of the effect of ink on the strength of the bonded joint and the penetration depth of the adhesive into the material are also included. The ink was used in the adhesive mixtures for the purpose of colouring the bonded joint.
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Study of limestone decarbonation process
Koporcová, Diana Mária ; Bureš,, Jaroslav (referee) ; Dvořák, Karel (advisor)
Submitted master´s thesis examines research of connections between the type of limestone and the process of decarbonation. Types of limestones and genesis of limestones are described in the theoretical part of the thesis, followed by the description of the process of decarbonation, methods used for analysis of limestone structure and research of solved problems. Experimental part of the thesis describes HT-XRD analysis, SEM analysis and simultaneous TG/DTA analysis performed on chosen group of limestone samples. The process of decarbonation and the change of microstructure of the developing calcium oxide are examined from the obtained data.
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Speciální technické řešení pro úpravu přírodních substrátů pomocí atmosférického plazmového výboje
ŠOFRONIČ, Tomáš
The thesis deals with the design and subsequent construction of a special hermetic box for the treatment of biological substrates with the help of plasma discharge Gliding Arc. In the theoretical part of the thesis there is a summary of the basic information concerning the design of hermetic box, plasma, hexamethyldisiloxane as a precursor and wood as a lignocellulosic substrate. The experimental part of the thesis is focused on pilot measurements in which specimens were treated plasma and hexamethyldisiloxane. Furthermore, the effect of the treatment on the hydrophobic of the surface was investigated with the drop method. With the help of SEM microscopy was investigated the effect of modification on surface morphology
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Surface functionalization of the materials by plasma technologies
TROUP, František
This thesis deals with the plasma functionalization of nanofiber materials for biomedical applications. Nanofibers of SiO2 and PCL was functionalized using a microwave plasma in order to establish amine functional groups. The work includes theoretical assumptions selection of these materials, their properties and current use with emphasis on biomedical applications. The paper also presents the theoretical foundations of plasma technology, their principles and practical applications. The experimental part of the work includes the optimization of process parameters for each nanofiber materials, review hydrophilisation surface and material degradation through SEM and private functionalization. In conclusion outlines proposals for further action beyond the experiments of this work.
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