Tannin-inspired robust fabrication of superwettability membranes for highly efficient separation of oil-in-water emulsions and immiscible oil/water mixtures

Chisiang Ong, Yusuf Shi, Jian Chang, Fadhilah Alduraiei, Nimer Wehbe, Zeyad Ahmed, Peng Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)


In this work, a simple and facile approach was developed to modify hydrophobic polyvinylidene fluoride (PVDF) microfiltration membrane with superhydrophilicity and excellent underwater anti-oil adhesion properties. The approach involves a rapid deposition of tannic acid (TA) on the membrane surface followed by its oxidation by sodium periodate (NaIO4). The modified membrane not only showed a promising oil/water separation (greater than 98%) with an average water flux ranging from 38 ± 13 to 401 ± 97 L/m2-h for different kinds of surfactant-stabilized oil-in-water emulsions driven by vacuum pressure but also exhibited excellent recyclability and chemical stability. The modification method is versatile, can be applied on different types of substrate materials, such as non-woven textile and mesh, and thus has a great potential to fabricate materials at large-scale for industrial oily wastewater treatment.

Original languageEnglish
Article number115657
JournalSeparation and Purification Technology
Publication statusPublished - 15 Nov 2019
Externally publishedYes


  • Oil-in-water emulsions
  • Polyvinylidene fluoride
  • Superwettability
  • Tannic acid

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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