Manara - Qatar Research Repository
2 files

A spiral-windable, free-standing, durable membrane constructed with ultralong hydrogel@MnO2 nanowires for oil/water separation under harsh environment

journal contribution
submitted on 2024-05-16, 08:33 and posted on 2024-05-16, 08:33 authored by Oluwaseun Ogunbiyi, Jayaprakash Saththasivam, Yongfeng Tong, Jenny Lawler, Zhaoyang Liu

An ideal membrane for oil/water separation at industrial scale is expected to possess the combined merits of excellent separation performance, sound mechanical flexibility, and high durability under harsh environments. In response to these challenging requirements, we came up with a new concept to design the membrane constructed with ultralong hydrogel-functionalized MnO2 nanowires. The super-oleophobic nanowires form highly open and tight pore structures within the membrane, which endows its high permeation flux (2800 L h−1 m−2 bar−1), high oil/water separation efficiency (>99 %) and low fouling tendency for separating emulsified oil from water. Furthermore, the brittleness problem of MnO2 materials is collectively resolved due to the high aspect ratio and surface functionalization of the hydrogel-functionalized MnO2 nanowires. This results in the new membrane with extraordinary mechanical flexibility and potential for spiral-wound membrane modules, which are highly desired in industrial applications due to a lower footprint and lower capital cost. The new membrane also demonstrates high durability under harsh environments with non-neutral pH values or high salinities. Given its facile synthesis process and inexpensive materials, this spiral-windable and durable membrane with high separation performance has the great potential to be applied at industrial scale for oily wastewater treatment under harsh environments.

Other Information

Published in: Separation and Purification Technology
See article on publisher's website:


Open Access funding provided by the Qatar National Library.



  • English



Publication Year

  • 2024

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License.

Institution affiliated with

  • Hamad Bin Khalifa University
  • Qatar Environment and Energy Research Institute - HBKU

Usage metrics

    Qatar Environment and Energy Research Institute - HBKU



    Ref. manager