Influence Of Hydrolysis, Solvent And Pvp Addition On The Porosity Of Psf/Pur Blend Partly Degradable Hollow Fiber Membranes Evaluated Using The Memoexplorer Software

Asymmetric hollow fiber membranes were prepared by a dry/wet phase inversion process. Polysulfone and 2 types of polyurethanes (PUR) (with a different percentage share of ester bonds in PUR structure) were used as membrane-forming materials, N-methyl-2-pyrrolidone or N,N-dimethylformamide as a solvent and polyvinylpyrrolidone as a pore precursor addition. The membranes were treated with NaOH solution (hydrolysis process) due to the presence of ester bonds in the PUR structure. Scanning electron microscopy (SEM) was used to analyze the morphology of the membranes. The influence of hydrolysis process, the type of solvent and pore precursor addition on the porosity was studied. Differences of the porosity in various membranes were evaluated by the MeMoExploror software using SEM images.