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| Pokročilé materiály na báze anorganických vrstevnatých štruktúr študované modelovým a experimentálnym prístupom | |
| Advanced materials based on the inorganic layered structures studied by model and experimental approaches | |
| Program: | VEGA |
| Project leader: | Ing. Scholtzová Eva, CSc. |
| Annotation: | The project presents a combined theoretical and experimental research of selected pollutants adsorbed on the layered structures (LS) based on graphene (G), aluminosilicates (AS) and their modifications with improved physicochemical properties. Pollutants are extracted significantly, e.g., from contaminated waters, by adsorption on these LS. A comparative study on the adsorption effectivity of pollutants by layered structures of the G type (expensive materials) and clays (lower cost) is focused on understanding the interactions responsible for the forming and stability of these complexes. New knowledge about the way of pollutants immobilisation also contributes to the proposal of advanced hybrid materials combining properties of both types of LS applied in green technologies. The outputs from modelling will also interpret the results obtained experimentally to achieve a complex characterisation of the studied advanced materials based on the inorganic layered structures. |
| Duration: | 1.1.2023 – 31.12.2026 |
| Photomat – Fotofunkčné hybridné materiály organických luminofórov a nanočastíc vrstevnatých silikátov | |
| Photofunctional hybrid materials of organic luminophores and nanoparticles of layered silicates | |
| Program: | SRDA |
| Project leader: | Mgr. Boháč Peter, PhD. |
| Annotation: | The topic of the project is based on modern trends in materials research, and the experience and recent results of the project team. It was discovered that adsorption, intercalation, or molecular aggregation of specific types of organic molecules can significantly increase their photoactivity, manifesting as an increase in luminescence. The strategy of increasing photoactivity will be the main objective of the project. Each of the phenomena should be applied depending on the molecular structure of the luminophores. The project will focus on hybrids of photoactive organic luminophores and layered silicates. Structurally optimized S,N-heteroaromatic dyes and their ion metal complexes will be prepared within the project. Heteroaromatic systems will be modified by cationic groups or their functionalization with cationic metal ions including Ru(II), Ir(III), Au(III), and others to increase the compatibility of these chromophores with silicates and achieve the required photophysical properties. Appropriate selection of the layered carrier, choice of chemical modification, and suitable conditions for the synthesis of hybrid systems will be the key factors to achieve the project objectives. In addition to improving the properties of molecules, other goals will be to prepare complex functional materials with efficient use of light energy. Here, the organization of molecules in nanostructural hybrids will play a key role to achieve optimal photophysical interactions aimed at specific functionality. In addition to luminescent properties, the aim will be to prepare hybrids with mainly photosensitizing properties. The last step will be the use of nanoparticles for the modification of technical polymers by the formation of nanocomposites. The objective will be obtaining surfaces with photosensitizing and photodisinfection properties, which will be tested for the growth of microbial biofilms. |
| Duration: | 1.7.2023 – 30.6.2026 |
| BENTONITE – GAP – Bentonit: strategická surovina Slovenska – inovatívne hodnotenie zdrojov a ich kvality pre jej efektívne využívanie | |
| Bentonite: Slovak strategic raw material – Innovative assessment of bentonite quality and origin for its efficient use | |
| Program: | SRDA |
| Project leader: | RNDr. Madejová Jana, DrSc. |
| Annotation: | Bentonite is an important industrial raw material. Due to the high amount of clay minerals from the smectite group, bentonite has unique properties, e.g. high swelling capacity, plasticity, high specific surface area, cation exchange capacity and low hydraulic conductivity. Due to these properties bentonites have broad range of possible applications. Consequently, worldwide bentonite production is constantly increasing. Slovak republic (SR) is one of the world\’s leading bentonite producers and bentonites belong to the strategic raw materials in SR. In the last 10-15 years, several new bentonite deposits have been opened in SR, most of which have never been studied in detail.Which is one of the causes that the potential of Slovak bentonites is not fully utilized. One of the objectives of the project is therefore the comprehensive characterization of bentonites from new deposits. The mineral and chemical composition of bentonites, their physico-chemical, mechanical, and rheological properties will be determined. The obtained results will help to better understand the geology and genesis of bentonite deposits which may lead to thediscovery of other economic accumulations of bentonites. The main contribution of the project lies in the rational, economical, and efficient use of domestic raw materials which will lead to the long-term sustainability of bentonite exploitation in SR. The way in which the proposed changes will be implemented is highly innovative. The main application outputs of the project such as: passports for the optimal utilization of different qualitative types of bentonites, including economic analysis, 3D model of bentonite quality and geological model of selected bentonite deposit, will contribute to achieve this ambitious goal. The multidisciplinary team of experts on domestic and worldbentonites in cooperation with major bentonite producer in SR, REGOS, s.r.o. is guarantee of successful solution ofthe proposed project. |
| Duration: | 1.1.2021 – 30.6.2025 |
| BioPolSil – Bionanokompozitné materiály na báze vrstevnatých silikátov | |
| Bionanocomposites based on organic polycations and layered silicates | |
| Program: | SRDA |
| Project leader: | RNDr. Madejová Jana, DrSc. |
| Annotation: | The basic research project deals with the preparation and complex characterisation of the structurally unique typesof hybrid materials consisting of clay minerals from smectite group and new synthesized poly(ethylene imine)based polycations. Polymerization of oxazolines opens a wide range of possibilities for the preparation of welldefinedpolycations with precisely designed molecular architectures and properties in order to prepare suitableintercalating agents for clay minerals modifications. The aim is to provide nanocomposites with interestingbiocompatible or biodegradable properties. To achieve this aim a detailed investigation of the effect of variousfactors on the molecular characteristics of poly(ethylene imine) based polycations and consequently on theirbehavior upon smectites interlayers intercalation has to be performed using wide range of different experimentaltechnique (e.g., XRD, XPS, MAS NMR, and IR spectroscopies) but also by means of DFT method in the solidstate.Biocompatibility of prepared polycations and their smectite intercalates will be assed based on cell viability assayand cell morphology after direct contact with selected substances. Prepared polycationic-smectites will be furtherstudied due to their possible applications as new types of fillers for selected biodegradable polymers, drug-deliverysystems and as new composite materials with optical properties. Interdisciplinary project, as designed, providesunique platform for understanding the properties of the newly synthesized polycation-smectite composites. This approach can significantly contribute to the current level of knowledge in the fields of nanomaterials and has the potential for acquiring fundamentally new results. |
| Duration: | 1.7.2020 – 30.6.2024 |