Synthesis and characterization of sulfonated-poly(vinyl alcohol) membranes for the pervaporation dehydration of isopropanol

► Flux was increased with increasing the SPTA content from 5 to 15 mass% in PVA. ► Total flux and flux of water are overlapping; suggest that membranes are selective. ► Membrane containing 15 mass% of SPTA showed the highest separation selectivity. ► The negative ΔHs values indicated that Langmuir's mode of sorption is predominant.