20.500.12556/DKUM-10027 VPLIV TOPIL NA MORFOLOŠKO STRUKTURO POROZNIH ZAMREŽENIH POLISTIRENSKIH MEMBRAN Times New Roman CE; Influence of solvents on morphological structure of porous crosslinked polystyrene membranes Namen diplomske naloge je bil raziskati vpliv različnih topil (porogenih) na morfološko strukturo poroznih zamreženih polistirenskih membran. Iz organske in vodne faze smo pripravili vodno-oljne (v/o) emulzije z visokim deležem notranje faze (HIPE). Nastale emulzije smo nanesli na stekleno ploščo v tanki plasti in jih polimerizirali s povišano temperaturo. Po čiščenju smo dobili porozne zamrežene poliHIPE membrane. Membrane smo pripravili na osnovi stirena, zamreženega z divinilbenzenom (DVB). Spreminjali smo delež vodne faze (75 % in 85 %) in delež DVB (2 % in 4 %). Da bi raziskali vpliv topil na strukturo membran, smo membrane modificirali z dodatkom plastifikatorja (2-etilheksil akrilat) in dveh porogenih topil (toluen in klorobenzen). Vse dobljene membrane smo okarakterizirali z merjenjem njihove končne debeline, s pretočnostjo za deionozirano vodo in z določitvijo stopnje nabrekanja v štirih različnih topilih (v vodi, acetonitrilu, toluenu in kloroformu). V izdelavo membran smo vključili tudi 4-nitrofenil akrilat kot reaktivno komponento v organski fazi, zaradi možnosti nadaljnje funkcionalizacije membran in uporabe pri sinteznih tehnikah. Purpose of this diploma work was to investigate how diferent solvents influenced the morphological structure of porous crosslinked polystyrene membranes. Water in oil (w/o) high internal phase emulsions were prepared from organic and water phase. Membranes were prepared by casting a thin layer of emulsion on a glass plate and polymerised at elevated temperature. After purification porous poliHIPE membranes were obtained. The ratio of water phase (75 % and 85 %) and ratio of divinylbenzene (2 % and 4 %) were altered. Divinylbenzene (DVB) was used as a crosslinker and styrene was used as a basic component of oil (organic) phase. In order to study the effects of solvents on the stucture of membranes we modified the membranes by adding two porogens (toluene and chlorobenzene) and the plasticizer (2-ethylhexyl acrylate). All yielding membranes were characterized by measuring theirs cast thickness, flux of deionised water and swelling degree in four solvents (deionised water, acetonitrile, toluene and chloroform). Further, we used 4-nitrophenylacrylate as a reactive component in organic phase to prepare membranes for further functionalisation. stiren divinilbenzen polimeri emulzije z visokim deležem notranje faze (HIPE) poliHIPE materiali membrane styrene divinylbenzene polymers high internal phase emulsions (HIPEs) polyHIPE materials membranes true true false [S. Seifried] Slovenski jezik Angleški jezik Diplomsko delo 2009-03-25 19:05:57 2009-08-06 11:49:41 2022-04-11 15:56:13 2022-04-15 03:34:17 2009 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.725.2:66.061.18(043.2) 13318166 URN:SI:UM:DK:IGPB083T UNI_Seifried_Silvo_2009.pdf UNI_Seifried_Silvo_2009.pdf 1 F42E04FF18198B53F60F11AF34CC8577 dcf5e8d00b6396552954890f94b9161447067ca140de00583102b5e6e80a6348 b358acaf-7c02-11eb-bb7a-00155d0001ca 20.500.12556/dkum/5c361601-9d5b-4f99-bee0-ae02a5e0e833 https://dk.um.si/Dokument.php?lang=slv&id=7911 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0