hollow fiber membrane with improved separability and fabrication of a hollow fiber membrane that has enhanced separability

摘要

The invention relates to a method for fabricating a hollow fiber membrane beam from a plurality of pvp and polysulfone based hollow fiber membranes comprising providing a spinning solution comprising a polysulfone based material. in particular polysulfone, a vinylpyrrolidone-based polymer, in particular polyvinylpyrrolidone, an aprotic solvent, in particular dimethylacetamide, provide a coagulant liquid comprising water and an aprotic solvent, in particular dimethylacetamide, coextruding the spinning solution and the coagulant liquid through a concentric annular die forming a hollow wire, through which the wire cavity is filled with coagulant liquid, drive the wire through a precipitation gap, introduce the wire into a rainfall bath comprised substantially of water so To obtain a hollow fiber membrane, guide the hollow fiber membranes through at least one rinse and dry the obtained hollow fiber membrane, arrange the resulting hollow fiber membranes in a hollow fiber membrane bundle and treat the hollow fiber membrane bundle with water vapor.