An experimental study on phase inversion behavior of PVDF solutions and the prepared membrane morphology

Phase inversion of PVDF solutions was investigated by introducing various non-solvent additives. Hollow fiber membranes were prepared via a wet spinning process to correlate phase inversion and morphology. The precipitation of the polymer solutions with additive was following the trend of phosphoric acid> glycerol> ethanol> PEG-400. From FESEM, the membrane morphology was affected by thermodynamic and kinetic effects of phase inversion

Keywords:

Polyvinylidene fluoride , Phase inversion , Non-solvent additive , Asymmetric membrane