Strategies in forward osmosis membrane substrate fabrication and modification: A review

Nur Diyana Suzaimi, Pei Sean Goh, Ahmad Fauzi Ismail, Stanley Chinedu Mamah, Nik Ahmad Nizam Nik Malek, Jun Wei Lim, Kar Chun Wong, Nidal Hilal

Research output: Contribution to journalReview articlepeer-review

Abstract

Forward osmosis (FO) has been recognized as the preferred alternative membrane-based separation technology for conventional water treatment technologies due to its high energy efficiency and promising separation performances. FO has been widely explored in the fields of wastewater treatment, desalination, food industry and bio-products, and energy generation. The substrate of the typically used FO thin film composite membranes serves as a support for selective layer formation and can significantly affect the structural and physicochemical properties of the resultant selective layer. This signifies the importance of substrate exploration to fine-tune proper fabrication and modification in obtaining optimized substrate structure with regards to thickness, tortuosity, and porosity on the two sides. The ultimate goal of substrate modification is to obtain a thin and highly selective membrane with enhanced hydrophilicity, antifouling propensity, as well as long duration stability. This review focuses on the various strategies used for FO membrane substrate fabrication and modification. An overview of FO membranes is first presented. The extant strategies applied in FO membrane substrate fabrications and modifications in addition to efforts made to mitigate membrane fouling are extensively reviewed. Lastly, the future perspective regarding the strategies on different FO substrate layers in water treatment are highlighted.

Original languageEnglish (US)
Article number332
Pages (from-to)1-42
Number of pages42
JournalMembranes
Volume10
Issue number11
DOIs
StatePublished - Nov 2020

Keywords

  • Blending
  • Electrospinning
  • FO substrate
  • Fabrication and modification
  • Fouling mitigation
  • Internal concentration polarization
  • Surface coating
  • Template-assisted technique
  • Thin film composite

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Filtration and Separation

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