Jump to main content
Jump to site search

Issue 36, 2017
Previous Article Next Article

Smart candle soot coated membranes for on-demand immiscible oil/water mixture and emulsion switchable separation

Author affiliations

Abstract

Oil/water separation is of great importance for the treatment of oily wastewater, including immiscible light/heavy oil–water mixtures, oil-in-water or water-in-oil emulsions. Smart surfaces with responsive wettability have received extensive attention especially for controllable oil/water separation. However, traditional smart membranes with a switchable wettability between superhydrophobicity and superhydrophilicity are limited to certain responsive materials and continuous external stimuli, such as pH, electrical field or light irradiation. Herein, a candle soot coated mesh (CSM) with a larger pore size and a candle soot coated PVDF membrane (CSP) with a smaller pore size with underwater superoleophobicity and underoil superhydrophobicity were successfully fabricated, which can be used for on-demand immiscible oil/water mixtures and surfactants-stabilized oil/water emulsion separation, respectively. Without any continuous external stimulus, the wettability of our membranes could be reversibly switched between underwater superoleophobicity and underoil superhydrophobicity simply by drying and washing alternately, thus achieving effective and switchable oil/water separation with excellent separation efficiency. We believe that such smart materials will be promising candidates for use in the removal of oil pollutants in the future.

Graphical abstract: Smart candle soot coated membranes for on-demand immiscible oil/water mixture and emulsion switchable separation

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Jun 2017, accepted on 19 Aug 2017 and first published on 21 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR04448H
Citation: Nanoscale, 2017,9, 13610-13617
  •   Request permissions

    Smart candle soot coated membranes for on-demand immiscible oil/water mixture and emulsion switchable separation

    J. Li, Z. Zhao, D. Li, H. Tian, F. Zha, H. Feng and L. Guo, Nanoscale, 2017, 9, 13610
    DOI: 10.1039/C7NR04448H

Search articles by author

Spotlight

Advertisements