17 KB768 KB15 KB199219991999Kaiser, VladimirStropnik, Črtomirštevilka:3/4letnik:334 stranistr. 215-218ISSN:1318-0010COBISSID:157098URN:URN:NBN:SI:doc-58AEY8XYslInštitut za kovinske materiale in tehnologijeŽelezarna JeseniceŽelezarna RavneŽelezarna ŠtoreKovine zlitine tehnologijemembranepolisulfonvečfazni sistemiTernarni sistem polisulfon-dimetilacetatamid : voda; formiranje membrane po mokrem postopku fazne inverzije| Ternary system poly(sulphone)dimethylacetamide : water; formation of membrane by wet phase inversion|Polysulphone is an important material for polymeric asymmetric porous membranes preparation. Commonly used mode for their preparation is the wet phase inversion of ternary system polysulphone/dimethylacetamide:water (PSf/DMA:?$H_2O$?). We have studied characteristics of the system PSf/DMA:?$H_2O$? by formation of polysulphone membrane in the coagulation bath. In test-tubes we have made similar studies also by adding nonsolvent (?$H_2O$?) in initial PSfMA solution and vice-versa. By recognition that we attained we have tried to clear up PSf membrane formation mechanism, that we explained with "composition paths" in ternary phase diagram polymer/solvent:nonsolventPolisulfon je pomemben material za pripravo polimernih asimetričnih poroznih membran. Najširše uporabljen način njihove priprave je mokri postopek fazne inverzije ternanrnega sistema polisulfon/dimetilacetamid:voda (PSf/DMA:?$H_2O$?). Sistem PSf/DMA:?$H_2O$? smo opazovali pri formiranju polisulfonske membrane v koagulacijski kopeli. Podobna opazovanja smo izvedli tudi v epruvetah tako, da smo dodajali netopilo (?$H_2O$?) v izhodno raztopino in obratno. Pridobljena spoznanja smo poskušali uporabiti pri pojasnjenvanju mehanizma nastanka polisulfonskih membran, ki jih razlagamo s "potmi sestave" v ternarnem faznem diagramu polimer/topilo:netopiloTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije