| Abstract [eng] |
This project explores the possibilities of incorporating green synthesised silver nanoparticles into electrospun polyvinylpyrrolidone (PVP) nonwoven materials to create antibacterial and environmentally friendly materials. The study addresses a problem related to the application of sustainable nanoparticle production methods and the influence of incorporating these nanoparticles into a polymer matrix on fiber formation, morphology and material properties. The research plan included the preparation of marigold extract and its use for reducing silver ions, the electrospinning of PVP different solutions and various voltages The materials were analysed using SEM, TEM, viscosity measurements, conductivity and wettability tests, UV-VIS spectroscopy. The results showed that the size and shape of AgNPs formed during green synthesis are influenced by the properties of the extract, while the method of their incorporation determines changes in the viscosity and conductivity of the solutions, which directly affect the fiber diameter and the number of defects in the nonwoven materials. It was determined that marigold extract can successfully form silver nanoparticles whose morphology corresponds to that described in the literature, and that their incorporation into the PVP solution significantly alters the solution properties - small amounts of AgNPs increase viscosity, where higher concentrations reduce it due to aggregation, while electrical conductivity consistently increases with nanoparticle content. These changes had a direct impact on the electrospinning process: higher conductivity resulted in stronger electrostatic stretching and the formation of thinner, more uniform nanofibers, and appropriately selected synthesis and mixing conditions helped reduce the number of polymer beads and produce a more homogeneous nonwoven structure. Wettability tests revealed altered surface properties due to the incorporation of AgNPs. From a social and environmental perspective, green synthesized nanoparticles and their integration into nonwoven materials can reduce the use of chemical reagents and contribute to the development of sustainable technologies. Finally, the analysis confirmed that the incorporation of green-synthesized silver nanoparticles into electrospun nonwoven materials is a promising, safe, and socially valuable direction, enabling the creation of sustainable and functional materials whose properties can be deliberately controlled by adjusting solution preparation and electrospinning parameters, opening new application opportunities in medicine, filtration, and other fields of functional materials. |
