Article ID Journal Published Year Pages File Type
633890 Journal of Membrane Science 2014 8 Pages PDF
Abstract

•GO and PVA nanohybrid membrane for pervaporation of toluene/n-heptane mixtures.•“Pore-filling” composite membranes prepared by dynamic pressure-driven assembly.•Improvements of PV performance and swelling resistance with the addition of GO.

The stability of the membrane for pervaporation separation of aromatic/aliphatic mixtures is critical for industrial applications. To improve the stability of the membrane, a “pore-filling” membrane was prepared by dynamic pressure-driven assembly of a poly(vinyl alcohol)–graphene oxide (PVA–GO) nanohybrid layer onto an asymmetric polyacrylonitrile ultrafiltration membrane. The results of the swelling experiment suggest that the pore-filling structure could effectively reduce swelling of the nanohybrid membrane. Assembly of the nanohybrid membrane by molecular-level dispersion of GO in PVA led to enhanced affinity of the membrane to aromatic compounds and thus improved performance in the pervaporation of toluene/n-heptane mixtures. Moreover, the dynamic assembly process could easily be used to adjust the separation performance by controlling the pressure, filtration time, polymer, and GO concentration.

Keywords
Related Topics
Physical Sciences and Engineering Chemical Engineering Filtration and Separation
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