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
PolyNanoPhoto – Povrchy polymérov modifikované vrstevnatými nanočasticami a fotoaktívnymi farbivami
Polymer surfaces modified with layered nanoparticles and photoactive dyes
Program: SRDA
Project leader: Ing. Pálková Helena PhD.
Annotation: The project is an interdisciplinary basic research on nanocomposites of technically used polymers whosefunctionality depends on the properties of the organic dyes present. The aim will be to provide nanocompositeswith an increased particle concentration on the surface of the polymer. The particles must be pretreated withorganic surfactants prior to the synthesis of nanocomposites to achieve compatibility with the polymer, which willbe one of the main tasks of the project. In the next step, the modified particles will be functionalized with dyemolecules and used to prepare nanocomposite. The surface functionality will be achieved by suitably selecteddyes with interesting photophysical and photochemical properties. The goal will be to obtain surfaces which areattractive in terms of possible applications such as photosensitizing and photo-disinfecting properties,luminescent surfaces, systems capable of intermolecular light energy resonance transfer, etc. The selection ofthe dyes used will be directed to both to commercially available laser dyes and to photosensitizers mainly fromthe xanthene and thiazine dye groups, as well as to newly prepared fluorescent dyes.
Duration: 1.7.2019 – 30.6.2023
Porozumenie mechanizmu interakcií znečisťujúcich látok adsorbovaných na povrchu aluminosilikátových štruktúr
Insight into the mechanism of interactions of pollutants adsorbed on the surface of aluminosilicate structures
Program: VEGA
Project leader: Ing. Scholtzová Eva CSc.
Annotation: Proposed project presents a combined theoretical and experimental research of surface complexes formed by selected pollutants (oxyanions, herbicides, medicaments) on layered aluminosilicates (LAS) and aluminosilicate nanotubes (ASN). The pollutants can be strongly dismantled by adsorption on aluminosilicates, e.g. from polluted water. The study of these surface complexes will be focused on the detailed (molecular scale) description and understanding of the interactions responsible for the formation and stability of the complexes. Further, the effect of solvent on the stability of the complexes will be investigated as well. Molecular modelling approach, mainly based on the density functional theory (DFT) will bring a new knowledge about structure and properties of LAS/ASN surfaces and their ability to form stable complexes with pollutants. The results from experiments will be also interpreted by help of the modelling outputs to get a complex characterization of the pollutant-aluminosilicate complexes.
Duration: 1.1.2019 – 31.12.2022
Funkcionalizácia ílových minerálov netradičnými organickými surfaktantmi
Functionalization of clay minerals using unconventional organic surfactants
Program: VEGA
Project leader: RNDr. Madejová Jana DrSc.
Annotation: This project represents a combined experimental and theoretical approach to the study of nanoparticles of smectites functionalized by non-traditional organic surfactants. It is focused on new types of materials modified with selected quaternary alkylphosphonium and alkylammonium surfactants and cationic polymers. The research is mainly aimed on the relationship between smectite composition, structure and resulting properties of prepared materials. A special attention is devoted to the effects of surfactant\’s ionic head-group type, molecule size, shape and polarity on the structural characteristics and surface activity of prepared organoclays. Complex characterization of structure and properties of prepared advanced materials will be obtained from X-ray diffraction, spectroscopic methods and quantum calculations by DTF (Density Functional Theory). Studied materials have application potential as fillers for polymer composites, carriers of photoactive molecules and metal nanoparticles active in catalysis.
Duration: 1.1.2017 – 31.12.2020
nanomat – Nanokompozitné materiály na báze organo-fosfóniových smektitov a polymérov
Nanocomposite materials based on organo-phosphonium smectites and polymers
Program: SRDA
Project leader: Mgr. Jankovič Ľuboš PhD.
Annotation: Inorganic-organic composite materials are currently intensively studied systems, in particular in relation to the rapid development of new Technologies. The focus of the project is on the preparation and complex characterisation of new types of multicomponent systems based on clay minerals from the smectite group modified with alkylphosphonium surfactants. These materials have application potential in polymer composites and in optically active systems. The project will be focused on 1) synthesis of commercially unavailable alkylphosphonium sylts, 2) optimization of the procedure of their intercalation to smectites to achieve better properties in the interlayers compared to commercial alkylammonium organoclays, 3) preparation of complex systems of alkylphosphonium smectites and dyes of the photochemical and photophysical properties, which so far have not yet been studied and 4) testing of the synthetized alkylphosphonium organomontmorillonites as fillers in polymer matrices in order to take advantage of their properties to improve the thermal stability of composites, to reduce their flammability and to improve the barrier properties of packaging materials. A description of the structure and properties of the intercalates will be obtained by diffraction and spectroscopic methods and from quantum chemical calculations by means of DFT method in the solid state. It is expected that a comprehensive multidisciplinary approach, also thanks to the quality of the researchers and top/ranking instrumentation of both partners the objectives of the project will be met.
Duration: 1.7.2016 – 31.12.2020
BiofNano – Prevencia a eradikácia mikrobiálnych biofilmov vo vzťahu k nanomateriálom
Prevention and eradication of microbial biofilms in relationship to nanomaterials
Program: SRDA
Project leader: prof. RNDr. Bujdák Juraj DrSc.
Duration: 1.7.2016 – 31.12.2020