20.500.12556/DKUM-87951 Polimerizacija zamreženega odzivnega polimera na osnovi akrilamida diplomsko delo univerzitetnega študijskega programa I. stopnje Polymerization of crosslinked responsive polymer based on acrylamide V okviru diplomskega dela smo pripravili visoko porozne poli(N-izopropilakrilamid-ko-N,N'-metilenbisakrilamidne) polimere z različnimi stopnjami zamreženja s polimerizacijo kontinuirne (monomerne) faze emulzije z visokim deležem notranje faze. Monomerna faza emulzije je bila sestavljena iz monomerov, topila, surfaktanta in fotoiniciatorja Irgacure-819. Kot monomere smo uporabili N-izopropilakrilamid (NIPAm) in N,N'-metilenbisakrilamid (MBAA) kot zamreževalo. Monomere smo raztopili v mešanici topila etanola in vode. Emulzije smo stabilizirali z mešanico surfaktantov Pluronic L-121 in Triton x-405. Kot notranjo fazo emulzije pa smo uporabili cikloheksan (80 vol.%). Uspešnost polimerizacije smo preverili z gravimetrijo in s FT-IR spektroskopijo, s katero smo potrdili prisotnost karakterističnih funkcionalnih skupin v polimeru. Za preučevanje poliHIPE morfologije smo uporabili vrstično elektronsko mikroskopijo, z absorpcijo/desorpcijo dušika po Brunauer-Emmett-Teller (BET) metodi pa smo določili BET specifično površino poroznih polimerov. Ugotovili smo, da pri višji stopnji zamreženja (30 mol.% MBAA) dobimo polimere s tipično porozno poliHIPE morfologijo, ki se po polimerizaciji minimalno skrčijo. Materiali z nižjim odstotkom zamreženosti pa so imeli zaradi skrčenja materiala po polimerizaciji slabšo oz. bolj porušeno poliHIPE strukturo por. Vsi poliHIPE materiali na osnovi akrilamidov so imeli relativno nizko BET specifično površino (do 30 m2/g) in visok izkoristek polimerizacije (višji od 90%). Nadaljnji razvoj takšnih materialov bi ogromno doprinesel na področju biomedicinskih aplikacij, kontroliranem sproščanju zdravil in filtracijskih sistemih. This diploma thesis focuses on preparing highly porous poly(N-isopropylacrylamide-co-N,N’-methylenebisacrylamide) polymers with various degrees of crosslinking by polymerisation of the continuous (monomer) phase of a high internal phase emulsion. The monomer phase of the emulsion consisted of monomers, a solvent, a surfactant and a photoinitiator Irgacure-819. N-isopropylacrylamide (NIPAm) was applied as the monomers; N,N'-methylenebisacrylamide (MBAA) was used as a crosslinker. The monomers were dissolved in a mixture of ethanol and distilled water. The emulsions were stabilized with a mixture of surfactants Pluronic L-121 and Triton x-405. Cyclohexane (80 vol.%) was used as the internal phase of the emulsion. The success of polymerization was verified by gravimetry and FT-IR spectroscopy, which confirmed the presence of characteristic functional groups in the polymer. The scanning electron microscopy was used to study the morphology of polyHIPE; the nitrogen gas adsorption/desorption according to the Brunauer-Emmett-Teller (BET) theory was applied to determine the BET specific surface area of porous polymers. We found out that at a higher degree of crosslinking (30 mol.% MBAA) polymers with a typical porous polyHIPE morphology that minimally shrink upon polymerization were obtained. Materials with a lower percentage of crosslinking had a less promising or more disrupted polyHIPE pore structure due to the shrinkage of the material after polymerization. All acrylamide-based polyHIPE materials had a relatively low BET specific surface area (up to 30 m2/g) and high polymerization efficiency (higher than 90%). Further development of highly porous materials would make a huge contribution in the field of biomedical applications, controlled drug release and filtration systems. fotopolimerizacija HIPE poliHIPE materiali poliNIPAm FT-IR SEM photopolymerization HIPE polyHIPE materials polyNIPAm FT-IR SEM true true false [S. Kupec] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-04-02 21:33:04 2024-04-26 08:39:11 2024-07-27 04:26:44 0000-00-00 00:00:00 2024 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (VIII, 33 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 661.717.53.095.26(043.2) 202939907 UN_Kupec_Sara_2024.pdf UN_Kupec_Sara_2024.pdf 1 46532DC0633638442064B00D544533C8 a2133ef703e349e1b3d677008c7ddb9ce8eee6a2646341f796da03445db6c590 29026b4c-02f9-11ef-887c-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=178919 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0