20.500.12556/DKUM-93284 Sinteza in lastnosti poliHIPE materialov na osnovi N-vinilpirolidona magistrsko delo Synthesis and properties of polyHIPE materials based on N-vinylpyrrolidone V magistrskem delu smo uspešno sintetizirali visoko porozne polimerne materiale na osnovi N-vinilpirolidona (N-VP) s prosto radikalsko fotopolimerizacijo kontinuirne faze emulzije z visokim deležem notranje faze (HIPE) tipa olje v vodi. Z uporabo različnih zamreževal (pentaeritritol tetraakrilat (PETA), etilen glikol dimetakrilat (EGDMA) in trimetilolpropan triakrilat (TMPTA)) smo preučili njihov vpliv na morfologijo, poroznost in sposobnost absorpcije vode. Rezultati so pokazali, da lahko izbira zamreževala pomembno vpliva na nastanek različnih poroznih struktur – od tipične odprto celične poliHIPE strukture preko bikontinuirne morfologije do inverzne morfologije zlitih kroglic. Poleg tega na končno morfologijo materialov vpliva predhodna stabilnost emulzije (kemijska struktura in koncentracija surfaktanta ter kosurfaktanta) in sestava emulzije (volumen notranje faze in vrsta uporabljenih monomerov). Materiali so izkazali visoko poroznost (do 70%), kar je nekoliko nižje od teoretično pričakovane. To je verjetno posledica porušitve por med sušenjem. Uspešnost sinteze smo potrdili s FTIR spektroskopijo, kjer smo zaznali signale za značilne funkcionalne skupine. Vsi sintetizirani materiali so absorbirali vodo, pri čemer je imela največji vpliv koncentracija in tip zamreževala. Pri enaki koncentraciji zamreževala so najvišjo sposobnost absorpcije vode (okoli 400 % glede na maso vzorca) dosegli materili zamreženi z EGDMA, najmanj (okoli 100 % glede na maso vzorca) pa materiali zamreženi s PETA. Izvedene raziskave so potrdile uspešno sintezo visoko poroznih materialov na osnovi N-vinilpirolidona s prilagodljivimi morfološkimi in funkcionalnimi lastnostmi, ki predstavljajo dobro osnovo za nadaljnje raziskave in morebitno uporabo na biomedicinskih področjih. In this master thesis, highly porous polymeric materials based on N-vinylpyrrolidone (N-VP) were successfully synthesised by free radical photopolymerisation of the continuous phase of a high internal phase oil-in-water emulsions (HIPE). Different crosslinkers — pentaerythritol tetraacrylate (PETA), ethylene glycol dimethacrylate (EGDMA) and trimethylolpropane triacrylate (TMPTA) — were used to investigate their influence on the morphology, porosity and water absorption capacity of the materials. The choice of crosslinker was found to significantly influence the formation of different porous structures, ranging from the typical open-cell polyHIPE morphology to bicontinuous structures and inverted structures of fused spheres. Furthermore, the final morphology of the materials was found to be influenced by the initial emulsion stability (chemical structure and concentration of the surfactant and co-surfactant) as well as the emulsion composition (volume of the inner phase and type of monomers used). The synthesised materials exhibited high porosity (up to 70%), although this was slightly lower than theoretically expected, probably due to pore collapse during the drying process. The successful synthesis was confirmed by FT-IR spectroscopy, where characteristic signals from functional groups were detected. All synthesised materials absorbed water, with the concentration and type of crosslinker having the greatest influence. At the same crosslinker concentrations, the highest water absorption capacity (approx. 400 % of the sample weight) was observed for materials crosslinked with EGDMA, while the lowest capacity (approx. 100 % of the sample weight) was observed for materials crosslinked with PETA. The investigations carried out confirmed the successful synthesis of highly porous N-vinylpyrrolidone-based materials with tunable morphological and functional properties, providing a solid foundation for further research and potential biomedical applications. visoko porozni polimeri N-vinilpirolidon hidrogeli morfologija zamreževalo. highly porous polymers N-vinylpyrrolidone hydrogels morphology crosslinker. true true false [M. Vengust] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-06-17 23:03:25 2025-07-01 07:43:40 2025-07-24 03:09:26 0000-00-00 00:00:00 2025 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (X, 52 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.095.26(043.2) 243536899 MAG_Vengust_Melani_2025.pdf MAG_Vengust_Melani_2025.pdf 1 2B1E0BED6785A41F985ED47E92283462 80d97aae0dc6ed1a56f53749c784c2a8a065b22098197d5ba20947a6665d78c2 cefbe6a2-5345-11f0-84e1-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=192847 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0