1992 Volume 48 Issue 10 Pages 576-582
Porous hollow fibers of polysulfone (PS) were spun by the wet or dry-wet spinning technique by using four-hole tube-in-orifice spinneret, polymer dope consisting of PS/Dimethylformamide (DMF)=20/80wt%, and water as bore precipitant and coagulant. Contacting solvent (DMF) to dope from bore precipitant side (inside) and coagulant side (outside), water (inside)-solvent (DMF)-dope-solvent (DMF) extruded from the four-hole spinnineret were drawn into a coagulation water bath. The coagulation rate was controlled by solvent onto the dope. Performance of the porous hollow fibers, i.e., water content, density, stress-strain property, air flux and morphology were investgated. The surface and internal structures of porous hollow fibers could easily be controled by the time of contacting solvent with dope.
