| Popis: |
In this study, the effect of polyvinylpyrrolidone (PVP) as a pore former on the performance of polysulfone (PSF) membrane was studied. XRD spectra revealed that a crystalline-to-amorphous phase transition occurred with the increasing PVP amount. SEM results indicated the shape and size of macrovoids in the membranes were altered with the increasing PVP amount in the polymer solution. The Tg values for the pure PSF and of 5 wt% PVP added PSF membrane were measured as 189 and 182 °C, respectively. The performances of the membranes were determined by using the pure water flux (PWF) measurements. The PWF of the membranes increased from 36.76 to 86.80 L m-2 h-1 with the increase of PVP amount (0 to 10 wt %) in PSF polymer solution. The relationship between PWF and PVP content was explained with the increased thermodynamic instability and kinetic hindrance. |
