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Membranes from polysulfone/N,N-dimethylacetamide/water system
Vladimir Kaiser, Črtomir Stropnik, 2000, izvirni znanstveni članek

Opis: Polymeric membranes were prepared by the wet-phase separation method from solutions of different contents of polysulfone in N,N-dimethylacetamide; solutions were cast in different thickness before immersion into the pure water coagulation bath. Two main processes take place during the formation of membranes: nucleation and growth of the polymer lean phase with subsequent solidification of the polymer rich phase, and the formation of channels, macrovoids and mega-macrovoids. By the first process a cellular structure is formed whilst the second process connects the cells by opening the space between them. The degree of interconnectedness is an additional factor that affects the pure water flux. By changing the cast solution compositions and/or their cast thickness the interconnectedness of the cells can be controlled.
Ključne besede: chemical technology, organic technology, polymer membranes, membrane preparation, wet phase inversion, polymers, polysulphon
Objavljeno: 18.08.2017; Ogledov: 515; Prenosov: 56
.pdf Celotno besedilo (112,47 KB)
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