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Title:VPLIV TOPIL NA MORFOLOŠKO STRUKTURO POROZNIH ZAMREŽENIH POLISTIRENSKIH MEMBRAN
Authors:Seifried, Silvo (Author)
Krajnc, Peter (Mentor) More about this mentor... New window
Stropnik, Črtomir (Co-mentor)
Files:.pdf UNI_Seifried_Silvo_2009.pdf (2,45 MB)
 
Language:Slovenian
Work type:Undergraduate thesis (m5)
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract: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.
Keywords:stiren, divinilbenzen, polimeri, emulzije z visokim deležem notranje faze (HIPE), poliHIPE materiali, membrane
Year of publishing:2009
Publisher:[S. Seifried]
Source:Maribor
UDC:544.725.2:66.061.18(043.2)
COBISS_ID:13318166 Link is opened in a new window
NUK URN:URN:SI:UM:DK:IGPB083T
Views:2505
Downloads:132
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:Times New Roman CE; Influence of solvents on morphological structure of porous crosslinked polystyrene membranes
Abstract: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.
Keywords:styrene, divinylbenzene, polymers, high internal phase emulsions (HIPEs), polyHIPE materials, membranes


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