28 KB668 KB18 KB200020262011Krajnc, PeterPulko, IrenaSeifried, SilvoSevšek, UrškaStropnik, Črtomirštevilka:3letnik:45str. 247-251ISSN:1580-2949COBISSID:860074URN:URN:NBN:SI:doc-QPGNBRNSenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijemembranemikroemulzijepolimeriporoznostPoly(styrene-co-divinylbenzene-co-2-ethylhexyl)acrilate membranes with interconnected macroporous structure| Poli(stiren-ko-divinilbenzen-ko-2-etilheksil)akrilatne membrane s povezano porozno strukturo|A combination of doctor blading and emulsion templating was used to prepare macroporous poly(styrene-co-divinylbenzene-co-2-ethylhexylacrylate) and poly(styrene-co-divinylbenzene) membranes with an interconnected porous structure. Water in oil high internal phase emulsions including monomers in the oil phase were cast onto a glass plate and polymerised at elevated temperature. After purification porous polyHIPE membranes were obtained. The volume ratio of aqueous phase (75 % or 85 %) and the molar ratio of divinylbenzene (2 % or 4 %) were varied, while the addition of chlorobenzene to the oil phase influenced the viscosity of the emulsions. A comonomer, 2-ethylhexylacrylate substantially improved the flexibility of the membranes. All yielding membranes were characterized by measuring their cast thicknesses and flow densities for deionised water. Scanning electron microscopy was used to study the morphological features of the membranesZa pripravo makroporoznih poli(stiren-ko-divinilbenzen-ko-2-etilheksil)akrilatnih in poli(stiren-ko-divinil)benzenskih membran z odprto porozno strukturo smo uporabili kombinacijo nanosa z nožem in emulzij. Emulzije tipa voda v olju z visokim deležem notranje faze, z monomeri v oljni fazi smo nanesli na stekleno ploščo in polimerizirali pri povišani temperaturi. Po čiščenju smo pridobili porozne poliHIPE-membrane. Variirali smo volumski delež vodne faze (75 % ali 85 %) in molski delež divinilbenzena (2 % ali 4 %), medtem ko je dodajanje klorobenzena v oljno fazo vplivalo na viskoznost emulzije. Z dodatkom komonomera, 2-etilheksil akrilata so se elastične lastnosti membran bistveno izboljšale. Dobljene membrane smo okarakterizirali z merjenjem njihove končne debeline in merjenjem njihove pretočnosti za deionizirano vodo. Elektronsko vrstično mikroskopijo smo uporabili za študij morfoloških lastnosti membranTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije