• 文献标题:   Poly(vinyl alcohol)-graphene oxide nanohybrid "pore-filling" membrane for pervaporation of toluenein-heptane mixtures
  • 文献类型:   Article
  • 作  者:   WANG NX, JI SL, LI J, ZHANG R, ZHANG GJ
  • 作者关键词:   dynamic pressuredriven assembly, nanohybrid porefilling membrane, toluene/nheptane separation, graphene oxide
  • 出版物名称:   JOURNAL OF MEMBRANE SCIENCE
  • ISSN:   0376-7388 EI 1873-3123
  • 通讯作者地址:   Beijing Univ Technol
  • 被引频次:   60
  • DOI:   10.1016/j.memsci.2013.12.023
  • 出版年:   2014

▎ 摘  要

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 (OVA-GO) nanohybricl layer onto an asymmetric polyaci:ylonitrile ultrafiltration membrane. The results of the swelling experiment suggest that the pore-filling structure could effectively reduce swelling of the nanohybricl membrane. Assembly of the nanohybricl membrane by molecular-level dispersion of GO in OVA led to enhanced affinity of the membrane to aromatic compounds and thus improved performance in the pervaporation of toluene/ii-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. (C) 2014 Elsevier B.V. All rights reserved.