The design of nanosheets
interlayer between the substrate and polyamide
layer has attracted growing attention to improve the performance of
thin-film composite membranes. However, the membrane size is limited
by current fabrication methods such as vacuum filtration. Herein,
a high-performance MXene (Ti3C2T
x
) interlayered polyamide forward osmosis (FO) membrane
is fabricated based on a combination of a facile and scalable brush-coating
of MXene on nylon substrates and the interfacial polymerization process.
The as-prepared FO membrane shows high water permeability of 31.8
L m–2 h–1 and low specific salt
flux of 0.27 g L–1 using 2.0 mol L–1 sodium chloride as the draw solution. This is attributed to the
adjustment of substrate properties and the polyamide layer by coating
of MXene as well as the facilitation of water transportation by the
interlayer distances between Ti3C2T
x
. The membrane also exhibits a good organic solvent
forward osmosis performance with high ethanol flux as 9.5 L m–2 h–1 and low specific salt flux
of 0.4 g L–1 using 2.0 mol L–1 lithium chloride as the draw solution. Moreover, the MXene interlayered
FO membrane demonstrates a feasible application in real seawater desalination
and industrial textile wastewater treatment. This work presents an
effective approach to fabricating nanomaterials interlayered FO membranes
with superior performance for both desalination and organic solvent
recovery.
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