Article ID Journal Published Year Pages File Type
9952618 Journal of Membrane Science 2018 26 Pages PDF
Abstract
Herein, we reported a facile and effective method to fabricate Janus ceramic membrane (JCM) and applied the membrane in the separation of oil/water emulsions. The original hydrophilic ceramic membrane was modified by hexadecyltrimethoxysilane (HDTMS), and the obtained hydrophobic membrane was exposed to O2/N2 plasma to achieve a bistratal hydrophilic-hydrophobic structure. Basically, JCM has underwater superoleophobicity and underoil superhydrophobicity on its hydrophilic plasma-treated and hydrophobic modified side, respectively; thus, it possesses an intelligent separation capability in many systems, including oil-in-water (O/W) emulsions with its hydrophilic side and water-in-oil (W/O) emulsions with its hydrophobic side. Moreover, on the hydrophilic side, JCM possesses an outstanding anti-fouling property, which is due to its higher surface free energy. The hydrophobic side could sieve W/O emulsions driven solely by gravity. An apparatus that could support changing-over filtration between W/O and O/W emulsions is devised and the long-time stability is also authenticated. We envision that our work can lead to the further development of Janus membranes in ceramic materials.
Related Topics
Physical Sciences and Engineering Chemical Engineering Filtration and Separation
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