ADVANCED MATERIALS

Dissertation thesis topics

The dissertation thesis topics proposed within the Advanced Materials research programme correspond to the research interests and objectives of the following research groups: Advanced Ceramic Materials, Cybernetics in Material Science, Advanced Polymers and Composites and Advanced Metallic Materials and Metal Based Composites. 


For details click on the title of disertation:

 

1. 3D printing of ceramic particles

Study of selective ceramic nanoparticles linking by photopolymer composition for ceramic prototypes manufacturing on the special 3D printer (Lithography based Ceramic Manufacturing). The photochemical processes of photopolymer crosslinking initialised by UV light will be studied. This photochemical reactions leads to selective connections of nanoparticles to patterned ceramic layers or 3D ceramic body. The physical and chemical properties of prepared ceramic layers will be studied.

SupervisorVeselý Michal, doc. Ing., CSc.


2. Organosilane binders of nanoparticles

A study of synthesis and properties of organosilane oligomeric condensates originating from various types of alkyl alkoxysilanes. Utilisation of these materials for desperation, ball-milling and stabilisation of nanoparticulate dispersion systems. Design of printing formulations and printing of thin layers for printed functionalities.

SupervisorVeselý Michal, doc. Ing., CSc.



3. Bioceramic composites and scaffolds and their 3D-printing using LCA method

Dissertation topic relates to functionally gradient composites and scaffolds based on multiphase Ca-phosphates. Synthesis, composition, morphology and properties of nanoparticles multiphase Ca-phosphate, non-stoichiometric Ca-phosphates and Ca-phosphate substituted biogenic elements and their application in the development of biocomposites and scaffolds of hierarchically or functionally gradient structure supporting osteoinduction of bone cells will be studied. Gradient or hierarchical structure of bioceramic composites and scaffolds will be shaped by means of 3-D printing using new 3D-photolithographic method (LCM- Lithography-based Ceramic Manufacturing) (device CeraFab 7500, Lithoz GmbH). Structure Supervisor: 

Supervisor: Cihlář Jaroslav, prof. RNDr., CSc.


4. Study of 3D-printing of advanced ceramic materials based on colloidal LCA method

The work is focused on the study of 3D-printing of advanced ceramic materials based on new 3D-photolithographic method (LCM- Lithography-based Ceramic Manufacturing) by means of the CeraFab 7500 equipment (Lithoz GmbH). Work will deal with preparation and study of stable homogeneous colloidal dispersions containing light-sensitive polymers and ceramic fillers to obtain dispersions suitable for 3D-printing of advanced oxide ceramics. PhD student will deal with issues of theoretical study and with experimental study of the properties of colloidal polymer-ceramic dispersions, dispersion behavior at 3D-printing and sintering of printed objects and evaluation of physical, mechanical and chemical properties of printed ceramics in relation to the structure of ceramics and conditions of the technological process.

SupervisorCihlář Jaroslav, prof. RNDr., CSc.


5. Nanostructured composites with a hierarchical structure

The topic of the dissertation is the study of polymer/inorganic composite biomaterials with a hierarchical structure composed of a nanofiber and nanoparticle components. Nanofiber polymeric components are prepared by methods electrospinning or centrifugal spinning and bioactive inorganic nanoparticles by ultrasonic or microwave synthesis. Preparation of hierarchical structures (biocomposites) will be studied by means of template methods and 3D-printing. The structure, mechanical and biochemical properties of biocomposites and their interactions with bone cells and tissues will be evaluated.

SupervisorCihlář Jaroslav, prof. RNDr., CSc.


6. Photoelectrochemical splitting of water and inorganic substances

Topic of dissertation relates of photoelectrochemical splitting of water and organic materials (aliphatic alcohols, aldehydes, etc.) in the visible spectrum. Experimental work will deal with the synthesis of photocatalytic active inorganic semiconductors and their modifications (eg. by carbonaceous phases), the preparation of stable colloidal precursors for the deposition of photoactive layers, preparing of photoelectrons and photoelectrochemical cells (reactors) and measuring of photoelectric parameters of photoelectrochemical cells and photocatalytic efficiency of photoreactors. Dissertation will also be focused on the study of the structure of the photocatalytic active systems and their interpetation by appropriate structural models and on design of foto electrocatalytic reactors in order to achieve maximum efficiency in the transformation of reactants and hydrogen production.

SupervisorCihlář Jaroslav, prof. RNDr., CSc.


7. Heterogeneous catalytic transformation of organic substances and hydrogen production

Dissertation will deal with the transformation of organic substances and the production of hydrogen using inorganic (mainly oxide) heterogeneous catalysts with perovskite, spinel or zeolite structure. The experimental part of the work will deal with the synthesis of catalytically active nanoparticles, preparation of stable colloidal precursors and preparation of catalytically active layers on inert (ceramic) supports by deposition methods. Kinetics of heterogeneously catalysed transformations of organic reactants (alcohols, hydrocarbons) in the gas phase will be studied with CATLAB apparatus (Hiden, UK). An important part of the thesis will present the study of nanostructures of catalytically active systems and interpretation of structural models in relation to long-term catalytic activity in order to achieve maximum efficiency in the conversion of organic reactants and hydrogen production.

SupervisorCihlář Jaroslav, prof. RNDr., CSc.


8. Ceramic high-temperature fuel cells and electrochemical reactors

Dissertation focuses on the study of ceramic high-temperature fuel cells and electrochemical reactors using organic compounds (hydrocarbons, aliphatic alcohols, etc.) as fuel or reactants. The experimental part of dissertation will deal with the synthesis of nanoparticles and colloidal precursors for preparation of ceramic high-temperature electrolytes, anodes and cathodes and manufacture of components, fuel cells and electrochemical reactors (electrolyte, electrodes…). To measure the electrical parameters of fuel cells and electrochemical parameters of electrochemical reactors the device of FulCellmaterials company for testing fuel cells, combined with a high-impedance spectroscopy and mass spectrometry will be used. The main aim of the dissertation is finding new electroceramic materials for reducing operating temperature of the fuel cells and to achieve maximum electrochemical efficiency of reactors.

SupervisorCihlář Jaroslav, prof. RNDr., CSc.


9. Electrospinning of ceramic and composite fibers 

The main objective of the study will be fabrication and characterization of electrospun ceramic based fibers for electric and electrochemical applications.

SupervisorČástková Klára, doc. Ing., Ph.D.


10. Colloidal processing of ceramic nanoparticles

The subject of the PhD study is focused on shaping and consolidation of nanoceramic oxide particles. The main task of the student will contain a study of bulk colloidal ceramics processing using ceramic particles with size below 100 nm via colloidal shaping methods. The research will concern primarily with methods of direct consolidation of ceramic particles. A common difficulty of all these methods lies in the preparation of a stable concentrated suspension of nanoparticles with appropriate viscosity. The solution of the problem assumes understanding and utilization of colloidal chemistry and rheology of ceramic suspensions.

SupervisorTrunec Martin, prof. Ing., Dr.


11. Machinable ceramics for 3D milling

The topic of this PhD study is a development of processing methods for a unique manufacturing of ceramic prototypes and small series of complex ceramic parts using 3D milling. The dissertation is focused on research into semiproducts (blanks) of advanced ceramics for 3D milling based on zirconia, alumina, calcium phosphates and other materials for dental and structural applications and prospectively even for customized complex-shaped surgical implants. The blanks will be prepared for both dense ceramic parts and bodies from a ceramic foam. For preparation of large and complex parts shaped machinable blanks will be developed that can ensure reliable and economical production of such parts.  The blanks will be processed by CAD/CAM methods utilizing CNC milling.

SupervisorTrunec Martin, prof. Ing., Dr.


12. Advanced ceramic materials and composites with multifunctional properties

The development in the field of advanced ceramic materials is directed to so-called multifunctional materials characterized by appropriate combination of mechanical, optical, electrical or magnetic properties. The design such materials includes selection of input powder precursors as well as advanced methods of their shaping and sintering leading to desired, usually heterogenous, microstructures. The aim of the dissertation work will be utilization of modern approaches of ceramic processing technology (plasma activation of precursors, dry and wet shaping methods, pressure-less or pressure-assisted sintering in various atmospheres) for preparation of multifunctional ceramic materials and composites, including evaluation of their properties linked to possible application.  Thesis will be supported by running mentor’s projects, such as „Utilization of theoretical and experimental approaches to sintering for tailoring the microstructure and properties of advanced ceramic materials“, „Physical activation of ceramic particles surface towards improved fine-grained advanced ceramics“, or „Transparent Alumina for Energy Saving Light Sources”.

SupervisorMaca Karel, prof. RNDr., Dr.


13. Tailoring of microstructure of advanced ceramic materials by conventional and non-conventional sintering approaches

The main goal of the thesis will be the tailoring the microstructure of advanced ceramics through the proper choice of sintering conditions. Various experimental approaches (conventional sintering, rapid sintering as well as non-conventional sintering-like Spark Plasma Sintering, Hot Isostatic Pressing etc.) will be studied and compared with the final aim to find the optimal way for processing of ceramics with improved microstructure and resulting improved structural and functional properties.  Part of the work will be aimed also to study of the energy transfer in various experimental conditions and its influence on mass transport mechanisms in polycrystalline ceramic materials. The work should result in comprehensive know-how of high-temperature processes in ceramic materials targeted to desired application. Thesis will be supported by running mentor’s projects, such as „Utilisation of theoretical and experimental approaches to sintering for tailoring the microstructure and properties of advanced ceramic materials“, „Physical activation of ceramic particles surface towards improved fine-grained advanced ceramics“, or „Transparent Alumina for Energy Saving Light Sources”.

SupervisorMaca Karel, prof. RNDr., Dr.


14. Shaping of bioceramic materials on micro level

Research in bioceramics is very rapid and directed towards application and preparation of customized scaffolds is required.  Porosity, shape of pores and internal channels are main parameters which have to be balanced to achieve tailored biological and mechanical properties. Aim of this Ph.D. study is tailoring of ceramic microstructure by customized shaping by combination of processing methods such as ice-templating, microtemplating, and slip-casting. Main investigated properties of ceramic bio scaffolds are porosity and microchannels architecture with focus on potential application in bone replacements or inorganic cells guides.

SupervisorSalamon David, doc. Ing., Ph.D.


15. Application of rapid sintering for local arrangement of ceramic microstructures

Development of advanced ceramic materials has emphasis on understanding the mechanical properties of ceramics and on improving their strength, toughness and damage resistance. Microstructure tailoring is crucial tool for this research, however localized microstructure tailoring is limited by possible localization of chemical or density compositions. The aim of this Ph.D. study is an investigation of the local application of rapid heating on microstructure tailoring. The proposed research is mainly focused on energy transfer via radiation and its new potential for control of microstructure. Future applications are in development of unique ceramic microstructures with better mechanical properties.

SupervisorSalamon David, doc. Ing., Ph.D.


16. Redox flow cells for energy storage

In this work the students will learn the current issue of storing energy through electrochemical redox flow cells. The experimental work will lead to the improvement of electrochemical cells based on the principle of reduction of vanadium compounds and to design and development of cells with new types of redox systems eventually aimed to replace the vanadium cells.

SupervisorVanýsek Petr, prof. RNDr., CSc.


17. Optical and electrochemical monitoring of the state of charge of electrochemical cells

In this work the students will become familiar with current issues in energy storage electrochemical redox flow cells and with monitoring the extent of their state of charge. The research will lead to the design and development of methods that can be used for continuous monitoring of the state of charge status. Two basic principles will be used: first, optical tracking in those systems where the spectrum varies coloration due to state of charge, and second, in the absence of optical changes,  measuring electrochemical properties.

SupervisorVanýsek Petr, prof. RNDr., CSc.


18. Modelling of the dependence of measured electrical and electrochemical material properties on the actual physical shape and dimensions of the studied samples

In this work the student will become familiar with problems of electrical and electrochemical measurements (especially impedance, voltage and current distribution on the electrodes and the flow of material in electrochemical cells). The student will concurrently learn the principles of computer modeling through the method "Finite Elements Modelling" while using commercial software. Computational research will lead to the clarification of the best practice for practical measurements, proposals for possible new practical geometry and the feedbacks to colleagues who are developing samples of functional designs.

SupervisorVanýsek Petr, prof. RNDr., CSc.


19. Influence of self-assembly of hydrogels on its deformation response

Self-assembly has significant influence to the deformation properties of hydrogels. This influence is not described in detail in literature. The task for PhD-student will be mapping of the different mechanisms of self-assembly. Selected mechanisms will be modelled by molecular dynamics. By this model, the student will analyze the transformation of self-assembly structures during deformation. Their influence to deformation behaviour will be investigated.

SupervisorŽídek Jan, Mgr., Ph.D.


20. „Smart“ polymer nanocomposite coatings

For detailed info please contact the supervisor.

SupervisorJančář Josef, prof. RNDr., CSc.


21. Hydrogel matrix nanocomposites for biomedical applications

For detailed info please contact the supervisor.

SupervisorJančář Josef, prof. RNDr., CSc.


22. Lightweight polyolefin structures with impact resistance engineered at nano-scale

For detailed info please contact the supervisor.

SupervisorJančář Josef, prof. RNDr., CSc.


23. Bottom-up assembly of nature inspired structural hierarchies

For detailed info please contact the supervisor.

SupervisorJančář Josef, prof. RNDr., CSc.


24. Spatial organisation of nanoparticles in block copolymers

For detailed info please contact the supervisor.

Supervisor:  Jančář Josef, prof. RNDr., CSc.


25. Effect of nanoparticle type, temperature, strain rate and system preparation technique on the non-linear deformation response of polymer glasses

For detailed info please contact the supervisor.

SupervisorJančář Josef, prof. RNDr., CSc.


26. Controlled life-span polyolefins

The ability of plastics to serve during their real application is a primary prerequisite of their commercial success. In the last few decades, however, much effort was given to their ability to get disintegrated after finishing their service. Despite there exist commercially available polymers with the controlled lifespan, such as polylactic acid (PLA) or polyhydroxyalkanoates (PHA), their prices and properties still do not match those of polyolefins, which are the cheapest and most produced plastics on the market (polyethylenes HDPE, LDPE, LLDPE, isotactic polypropylene (iPP) and its copolymers). The objective of this doctoral thesis should be investigation of complex pro degradant systems for selected polyolefins, where the polymer lifespan will be given by the controlled release of pro degradant system from micro-/nano- heterogeneous domains inside the polymer matrix, activation of pro degradant by outer impact such as absorption of radiation of appropriate wavelength or by deactivation of stabilizer protective system already present in the matrix.

SupervisorTocháček Jiří, doc. RNDr., CSc.


27. Effect of nanoparticle filler on physical behaviour and performance of stabiliser system in polymer

Effectiveness of stabilizers (antioxidants) in the polymer matrix is given not only by their chemical structure enabling them reactions with oxidative degradation intermediates, but also by their mobility within the polymer matrix and resisting the outer deteriorative impacts, capable of decreasing their level in polymer. Physical behaviour of stabilizer in the polymer matrix basically influences its polymer-protective performance. The presence of modifying nanofiller, which even in relatively low concentrations effectively impacts the physical behaviour of macromolecules and consequently changes physical properties of polymer matrix, influences also the behaviour and effectiveness of stabilizer system.  Investigation of the effect of presence of nanofiller on behaviour and function of particular groups of polymer stabilizers (processing, long-term, UV) in dependence on their chemical structure should be the objective of this doctoral thesis.

SupervisorTocháček Jiří, doc. RNDr., CSc.


28. Cell-Carriers by Chemical Modification of Polysaccharides

The aim of this dissertation is to use chitin/chitosan and their new derivatives (with different alkyl chains) and collagen to prepare 3D scaffold. The new chitin/chitosan derivatives will be used as matrices for different inorganic material (nano/micro hydroxyapatite, iron oxide). The chemical-physical interactions of the new nanocomposite will characterized by different tools (FTIR-TGA, NMR, XRD, SEM, TEM). The antibacterial, cytotoxicity, healing and histology of the new 3D bioscaffold will be analyzed and evaluated.

SupervisorAbdel-Mohsan Abdel-Lattif, Dr., Ph.D.


29. Effect of protein encapsulation on their controlled release accelerating regeneration of damaged tissue

For detailed info please contact the supervisor.

SupervisorVojtová Lucy, doc. Ing., Ph.D.


30. Hydrogel hybrid networks from biodegradable copolymers for medical applications

For detailed info please contact the supervisor.

SupervisorVojtová Lucy, doc. Ing., Ph.D.


31. Optimisation of biomechanical properties of composite resorbable cements for bone regeneration

For detailed info please contact the supervisor.

SupervisorVojtová Lucy, doc. Ing., Ph.D.


32. Effect of cell and scaffold staining on their 3D imaging using nanoCT

For detailed info please contact the supervisor.

Supervisor: Vojtová Lucy, doc. Ing., Ph.D.


33. Modification of synthetic hydrogels by biologically active substances

For detailed info please contact the supervisor.

SupervisorVojtová Lucy, doc. Ing., Ph.D.


34. Small diameter vascular grafts based on biodegradable polyurethanes

For detailed info please contact the supervisor.

SupervisorVojtová Lucy, doc. Ing., Ph.D.


35. Phase stability and magnetism of thin surface layers in Fe, Co, Pd a Pt binary alloys

FePd, FePt, CoPt, and other magnetic layers became extensively investigated because of their potential application in ultrahigh magnetic recording media. The aim of the study is to delimit a theoretical region of stability for selected crystals of binary alloys. Student will make a model of such crystals under simulated deformations using some of available ab initio codes. In particular, magnetic phase transitions will be studied during the deformation. Results will be compared with available literature data measured on thin films.

SupervisorČerný Miroslav, doc. Mgr., Ph.D.


36. Mechanic stability and strenght of crystalline solids from first principles

The aim of the study is to delimit a region of mechanical stability of selected crystals under nonhydrostatic triaxial loading. For this purpose, phonon spectra will be computed for the crystals in their ground states as well as in deformed states. Phonon spectra will be obtained using force constants that will be computed by the VASP code.

SupervisorČerný Miroslav, doc. Mgr., Ph.D.


37. Properties and behaviour of advanced materials in very-high-cycle fatigue régime

Special engineering and bio-mechanical applications require the use of advanced materials. Because of their cost and purpose it is essential to ensure adequate strength of components made from them over the lifetime. From the viewpoint of material fatigue the number of load cycles often exceeds 107. Materials for these special applications will be tested in very high cycle fatigue regime, i.e. from 106 to 1010 cycles. Numerical simulations by FEM will be used to design specimens, tests will be carried out on ultrasonic testing machine, failure mechanisms will be searched using a scanning electron microscope.

SupervisorKlusák Jan, doc. Ing., Ph.D.

 
38. Fracture mechanics of concentrators in composite materials

Composite materials exhibit outstanding properties thanks to suitable junction of two different materials. However, sharp materials interface can lead to degradation of the properties. Conditions of crack initiation in places of sharp shape and materials changes will be determined and evaluated using the procedures of generalized fracture mechanics.

SupervisorKlusák Jan, doc. Ing., Ph.D.


39. First-principles modeling of  metallic nanocomposites

One of the most interesting types of metallic nanocomposites is so-called superalloys formed by two different phases coherently sharing a common crystal lattice at the length scale of dozens and hundreds of nanometers. They exhibit a range of remarkable mechanical properties. Next to well-known classes of superalloys based on nickel or cobalt, there is a newly emerging class of very promising ferritic materials containing Fe and Al as base elements. The topic of the proposed doctoral thesis is a theoretical study of Fe-Al superalloys employing quantum-mechanical calculations and a design of their new chemical compositions.

SupervisorFriák Martin, Mgr., Ph. D. 


40. Damage mechanisms in nickel superalloys

Study of the damage in materials working at high temperatures in order to increase the fatigue and creep life and improve the energy efficiency of machines and equipment in aeronautics and energy production. Adopt demanding experimental techniques as computer controlled electrohydraulic testing machines and modern analytical methods (FESEM, EBSD FIB, TEM et al.) and study the behavior of nickel superalloys in conditions close to the service conditions. The principal damaging mechanisms during isothermal, high temperature fatigue in interaction with creep damage (dwells in a cycle) and during thermomechanical cyclic loading will be analyzed and used in prediction of service life.

SupervisorPolák Jaroslav, prof. RNDr. DrSc., dr.h.c.



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