Dehydration of isopropanol by poly(vinyl alcohol) hybrid membrane containing oxygen-plasma treated graphene oxide in pervaporation process

Poly(vinyl alcohol) (PVA)/polyethersulfone (PES) composite membranes were fabricated using two PVA polymers with molecular weights of 50,000 and 15,000 different crosslinker agents. The membrane the top layer consisting formaldehyde as found to have a better separation factor than others for pervaporative dehydration isopropanol. While adding 1.0 wt% graphene oxide could represent pervaporation factor, 248.7% higher that unfilled membrane, treating nanosheets cold plasma irradiation under oxygen atmosphere yield 47.5% compared containing untreated owing functional groups on treated enhance crosslinking density membrane. best treatment conditions in selected range 60 s 0.3 mbar pressure device power 25 watts. superior performance optimal present study was confirmed by comparing values normalized water index those previous studies. • Incorporating GO improve PVA/PES IPA dehydration. Plasma GOs increased their sites yielded factor. Improvement related density. Superior confirmed.