7th Takreer Research Centre Symposium
Open Access

Table 1

Summary of prominent work done on approaching anti-oil-fouling composite membranes.

Author Approach Findings
  • Zuo and Wang [22]

  • Hydrophilic/hydrophobic composite membrane Polyethylene glycol + TiO2 deposition on PVDF by plazma grafting

  • Pore size reduction from 0.55 μm to 0.27 μm

  • CA for water decreased from 120° to 25.2°

  • Stable flux observed (6.3 L/m2h)

  • 13% flux reduction to the baseline PVDF.

  • Wang and Lin [23]

  • Underwater-oleophobic/hydrophobic composite (FS/CTS/PFO-PVDF)

  • Stable in-air CA: 139.6°, in-water CA < 90° (hydrophilic)

  • Sharp reduction in permeate flux (31 L/m2 h for PVDF to 0.49 L/m2 h for FS/CTS/PFO-PVDF)

  • Lee et al. [25]

  • Omniphobic composite membrane Electrospun BTEAC/PVDF-HFP coated with SiNPs

  • Reduction of pore size from 2.23 μm for PVDF-HFP to 0.42 μm for BTEAC/PVDF-HFP

  • Water CA of ~150°

  • Stable flux and salt rejection

  • Lin et al. [26]

  • Omniphobic composite membrane APTES-coated GF with (-ve) charged SiNPs suspension treated with fluorinated alkyl silane (FAS)

  • High water CA (≈140°)

  • High oil CA (≈100°)

  • 100% salt rejection

  • Low flux of 2.7 L/m2 h (32.6 L/m2 h for PTFE)

  • Wang et al. [27]

  • Underwater-oleophobic/hydrophobic composite (CTS-PFO/SiNPs) Silica nanoparticles-polymer coating on PVDF substrate

  • Composite membrane porosity of 72.5% and pore size 388 nm, compared to 75% and 392 nm for the baseline PVDF

  • 4% membrane thickness increase in-air water CA: 0°, underwater oil CA: 149.5° Stable flux with initial value of 26.15 L/m2 h

  • Ahmed et al. [29]

  • Hydrophilic/hydrophobic composite Cellulose electrospun PVDF-HFP composite membrane

  • Pore size reduction from 0.92 μm to 0.3 μm

  • Porosity reduction from 91% to 35%

  • PVDF hydrophobic: water CA 130°, Cellulose/PVDF composite: oil CA of 169° and 0° for water

  • 90%–99% of oil separation efficiency achieved

  • Flux of 1781 L/m2 h bar

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