Influence of membrane morphology on characteristics of porous hydrophobic PVDF hollow fiber contactors for CO2 stripping from water

► Different membrane morphologies were obtained using dry-wet spinning technique. ► Phosphoric acid (PA) and PEG-400 were used as non-solvent additives in the PVDF dope. ► The plain PVDF membrane showed a finger-like structure with high permeability, overall porosity and low wetting resistance. ► The PVDF/PA membrane exhibited sponge-like structure with high surface porosity and wetting resistance. ► The PVDF/PA and PVDF/PEG-400 membranes presented relatively higher CO2 stripping flux than the plain membrane.