20.500.12556/RUL-145173 Vpliv ultrazvočnega soniciranja na zamreževanje TEMPO modificirane nanoceluloze in njenih mešanic Effect of ultrasonic sonication on the crosslinking of TEMPO modified nanocellulose and its blends Hidrogeli so tridimenzionalna polimerna omrežja, ki lahko absorbirajo in zadržijo velike količine vode. So funkcionalni materiali, primerni za uporabo na številnih področjih zaradi svojih dobrih lastnosti in biokompatibilnosti, zlasti za biomedicinske namene. Pri diplomskem delu sem se ukvarjal s pripravo in karakterizacijo hidrogelov pripravljenih iz TEMPO oksidirane nanoceluloze. V okviru eksperimentalnega dela so bile pripravljene različne mešanice hidrogelov iz nanoceluloznih vlaken in skleroglukana. Na podlagi meritev smo hidrogelom določili viskoelastične lastnosti ter spremljali spremembe v strukturi soniciranih in nesoniciranih enokomponentnih raztopin hidrogelov ter mešanic. Sonicirani vzorci tako TEMPO nanoceluze kot vzorci mešanic so se izkazali kot bolj zamreženi z višjimi vrednostmi viskoelastičnih modulov. Sonicirani vzorci so se izkazali za bolj toge v primerjavi z nesonicirani vzorci. Hydrogels are three-dimensional polymer networks that can absorb and retain large amounts of water. They are functional materials suitable for use in several fields due to their good properties and biocompatibility, especially in the biomedical field. In my thesis, I was involved in the preparation and characterization of hydrogels prepared from TEMPO oxidized nanocellulose. As part of the experimental work, various mixtures of hydrogels were prepared from TEMPO nanocellulose fibers and scleroglucan. Based on the measurements, we determined the viscoelastic properties of hydrogels and monitored changes in the structure of sonicated and non-sonicated one-component solutions of hydrogels and their mixtures. Sonicated samples of both TEMPO nanocellulose and mixtures were found to be better cross-linked with higher viscoelastic moduli values. Sonicated samples have proven to be more rigid than non-sonicated samples. TEMPO nanoceluloza zamreževanje hidrogel reologija ultrazvok TEMPO nanocellulose crosslinking hydrogel rheology ultrasound true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2023-04-12 11:15:00 2023-04-12 11:15:06 2023-04-14 09:58:25 0000-00-00 00:00:00 2023 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 22187 149156867 Marinic_Matija_-_Vpliv_ultrazvocnega_soniciranja_na_zamrezevanje_TEMPO_modificirane_nanoceluloze.pdf Marinic_Matija_-_Vpliv_ultrazvocnega_soniciranja_na_zamrezevanje_TEMPO_modificirane_nanoceluloze.pdf 1 49E69476873BA14AA3F80CEB6DDBBBB5 cd192a4a5ae914d4c48bb3f4e2273781c08f1237627519d6b7506d752dac6be6 5e979b29-d912-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167866 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0