20.500.12556/DKUM-53207 Strjevanje polimera v sistemu polisulfon/N,N-dimetilacetamid/voda in njegova morfološka raznolikost Solidification of polymer in system polysulfone/N,N-dimethylacetamide/water and its morphologic variety Preučevali smo mokro fazno inverzijo ternaranega sistema polisulfon/N,N-dimetilacetamid/voda (PSf/DMA/voda) z namenom, poglobiti razumevanje mehanizma nastajanja polimernih asimetričnih poroznih membran. Morfologije presekov membran smo preučevali z vrstično elektronsko mikroskopijo, sam proces fazne inverzije pa smo opazovali z merjenjem motnosti membranotvornega sistema med procesom nastajanja membrane. Spreminjanje vsebnosti polimera v raztopini (PSf/DMA) in debeline njenega nanosa povzroči v procesu mokre fazne inverzije poleg nastanka polimernega lateksa formiranje morfološko različnih membran. Nastanejo membrane s celično, dvozvezno in krogličasto zrnatao morfologijo. Njihov nastanek lahko predstavimo s "potmi sestave" v ternarnem faznem diagramu polimer/topilo/netopilo in pojasnimo z različnimi načini fazne inverzije. Wet phase inversion of a ternary system polysulfone/N,N-dimethylacetamide/water (PSf/DMA/water) was studied with intention to enhance the understanding of the mechanism of polymeric asymmetric porous membranes formation. Membranes cross-sections were investigated with scanning electron microscopy and the phase inversion process was observed by turbidity measurement of membrane forming system during the membrane forming process. Changing of polymer content in a PSf/DMA solution and thickness of cast layer cause the formation of a polymer latex and morphologically different membranes during the process of wet phase inversion. Membranes with cellular, bicontinuous and bead-like morphology are formed. Their formation can be presented in ternary phase diagram polymer/solvent/nonsolvent by "composition paths" and explained by different modes of phase inversion. polisulfonske asimetrične porozne membrane mokra fazna inverzija načini fazne inverzije morfologija polysulfone asymmetric porous membranes wet phase inversion formation mechanism modes of phase inversion morphology true false true Slovenski jezik Angleški jezik Znanstveno delo 2015-07-10 19:41:33 2015-07-10 19:41:33 2022-06-02 03:09:28 2021-05-10 03:35:29 2000 0 0 str. 151-155 št. 3/4 Letn. 34 2000 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1580-2949 678.6 106193664 221866 1580-2949 URN:SI:UM:DK:OPE4HNNZ Materiali_in_tehnologije_2000_Kaiser,_Stropnik_Strjevanje_polimera_v_sistemu_polisulfonN,N-dimetilacetamidvoda_in_njegova_morfoloska_raz.pdf Materiali_in_tehnologije_2000_Kaiser,_Stropnik_Strjevanje_polimera_v_sistemu_polisulfonN,N-dimetilacetamidvoda_in_njegova_morfoloska_raz.pdf 1 EC7B1E137881EA61CD16A1B25048F257 687a190bdc3db98fdaf60341f27293ec19722726657e92c49096648f028b8ccc 008faca0-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=109984 http://mit.imt.si/Revija/izvodi/mit0023/kaiser.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=109983 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0