Characterization and pervaporation dehydration of heat-treatment PAN hollow fiber membranes

▶ The PV performances of PAN hollow fiber membrane can be improved by heat-treatment. ▶ The heat-treated membranes morphology become denser and the free volume is reduced. ▶ The occupied space of PEG lead water molecules easy to permeate during PV. ▶ The long-term PV stability of heat-treated membranes can last at least 250 days.