Thin-film composite hollow fiber membranes incorporated with graphene oxide in polyethersulfone support layers for enhanced osmotic power density

Myoung Jun Park, Sungil Lim, Ralph Rolly Gonzales, Sherub Phuntsho, Dong Suk Han, Ahmed Abdel-Wahab, Samer Adham, Ho Kyong Shon

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This study focused on the development of pressure retarded osmosis (PRO) thin film composite (TFC) membranes for enhanced osmotic power using hollow fiber polyethersulfone (PES) support structure modified by incorporating hydrophilic graphene oxide (GO) nanosheets. The GO loadings in the hollow fiber substrates were varied to improve water flux performances without compromising the mechanical strength. GO embedded (≤0.2 wt%) PES hollow fiber supports revealed noticeable improvements in pure water permeability, improved structural morphologies, as well as the hydrophilicity within the support layer, without deteriorating the mechanical properties. The GO (0.2 wt%)-incorporated TFC-PRO membrane appeared to have an initial PRO flux (without any applied pressure) of 43.74 L m −2 h −1 , lower specific reverse salt flux of 0.04 g L −1 and structural parameter (S) of 522 μm, significantly better than the control membrane. The maximum power density of 14.6 W m −2 was achieved at an operating pressure of 16.5 bar under the condition of DI water and 1 M NaCl as feed and draw solutions, respectively. The results obtained in this study indicate that modification of PRO hollow fiber support layer by incorporating nanoparticles such as GO nanosheet can be a useful tool to improve the PRO performance.

Original languageEnglish
Pages (from-to)63-75
Number of pages13
JournalDesalination
Volume464
DOIs
Publication statusPublished - 15 Aug 2019

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Keywords

  • Graphene oxide
  • Hollow fiber membrane
  • Polyethersulfone
  • Pressure retarded osmosis
  • Thin film composite

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

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