20.500.12556/DKUM-89836 Vpliv iniciatorja in zamreženja na odzivnost hidrogel/stiren dvodomenskih poroznih polimerov magistrsko delo Effect of initiator and crosslinking on the responsiveness of hydrogel/styrene bidomain porous polymers Magistrsko delo predstavlja rezultate sinteze in proučevanja vplivov iniciatorja, zamreženja in drugih dejavnikov na dvodomenski porozni polimer. Ena domena je hidrogel, ki vsebuje akrilno kislino zamreženo z N,N'-metilenbis(akrilamid)-om, medtem ko druga domena, v kateri se ta hidrogel nahaja, vsebuje stiren zamrežen z divinilbenzenom. Tako se hidrogelu omeji prostor za nabrekanje in s tem poveča uporabnost. Polimer smo sintetizirali z verižno radikalsko polimerizacijo emulzije z visokim deležem notranje faze. Pomembno je bilo zagotoviti stabilnost emulzije, da ni prišlo do ločevanja faz. Monoliti so bili bele barve, togi, krhki in porozni, s sposobnostjo absorbiranja velike količine vode, kar je glavna lastnost hidrogelov. Najpomembnejši dejavnik, ki vpliva na absorpcijo vode, je bil delež zamreženja z divinilbenzenom. Uspešnejša kot je bila polimerizacija, višja je bila absorpcija vode. Karakterizacijo smo izvedli z vrstičnim elektronskim mikroskopom, gravimetrijo in testiranjem absorpcije vode. Material lahko okarakteriziramo kot mikrogel v polimerni matriki, vendar bi to bilo potrebno potrditi s presevnim elektronskim mikroskopom zaradi omejitev vrstičnega elektronskega mikroskopa. The master's thesis presents the results of the synthesis and study of the effects of the initiator, crosslinking, and other factors on a dual-domain porous polymer. One domain is a hydrogel containing acrylic acid crosslinked with N,N'-methylenebis(acrylamide), while the other domain, which encapsulates this hydrogel, contains styrene crosslinked with divinylbenzene. This restricts the swelling space of the hydrogel, thereby enhancing its applicability. The polymer was synthesized via high internal phase emulsion free-radical polymerization. It was crucial to ensure the stability of the emulsion to prevent phase separation. The resulting monoliths were white, rigid, brittle, and porous, with a high water absorption capacity, a key characteristic of hydrogels. The most significant factor affecting water absorption was the degree of crosslinking with divinylbenzene. The more successful the polymerization, the higher the water absorption. Characterization was carried out using scanning electron microscopy, gravimetry, and water absorption testing. The material can be characterized as a microgel within a polymer matrix, but this needs to be confirmed with transmission electron microscopy due to the limitations of scanning electron microscopy. poliHIPE hidrogel dvodomenski porozni polimer stiren divinil benzen akrilna kislina N N′-metilenbis(akrilamid) verižna radikalska polimerizacija absorpcija vode polyHIPE hydrogel dual-domain porous polymer styrene divinylbenzene acrylic acid N N'-methylenebis(acrylamide) free-radical polymerization water absorption true true false [D. Slemenšek] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-08-13 23:26:23 2024-09-03 08:33:11 2024-11-22 03:10:15 0000-00-00 00:00:00 2024 0 Maribor 0 Celje 1 spletni vir (1 datoteka PDF (XI, 81 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.773.432.057(043.2) 215914755 MAG_Slemensek_Domen_2024.pdf MAG_Slemensek_Domen_2024.pdf 1 4B9913E6648B03888183207AE3372191 5f1e236e29331de8efa32875650b7f35a762be831a8586106712e674e944159f 4431f2df-684a-11ef-83d7-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=183915 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0