Novel
Dimensionally Controlled Nanopore Forming Template in Forward Osmosis
Membranes
Version 2 2018-02-20, 20:21
Version 1 2018-02-20, 20:19
Posted on 2018-02-20 - 20:21
To
lower the unfavorable internal concentration polarization effect in
forward osmosis (FO) membranes, support layers of highly porous interconnected
structures with specifically large surface-to-volume ratios are indispensable.
Herein, zinc oxide (ZnO) has been introduced as a new template to
manipulate the porous structure of poly(ether sulfone) (PES) support
layer. The ZnO can be readily synthesized as desired in different
dimensionally controlled nanostructures. The performance of the FO
membrane was initially ameliorated in terms of permeability and selectivity
through simple incorporation of ZnO nanostructures in the PES support
layer. The PES support layer was blended with appropriate amounts
of ZnO nanostructures, casted on a glass plate, and subsequently acid
washed to leach out the embedded ZnO nanostructures. Different nanoporous
structures were achieved when ZnO of different nanostructures was
used to modify the PES support layer. The experimental results indicated
that the permeability of FO membranes could be simply improved by
incorporation of ZnO nanostructures in PES support layer. Higher hydrophilicity
and formation of suitable internal pores were mainly responsible for
such observation. Although surface hydrophilicity of the support layers
was reduced after being acid washed, water permeation through the
membrane was intensified due to the formation of interconnected porous
structure.
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Rastgar, Masoud; Bozorg, Ali; Shakeri, Alireza (2018). Novel
Dimensionally Controlled Nanopore Forming Template in Forward Osmosis
Membranes. ACS Publications. Collection. https://doi.org/10.1021/acs.est.7b05583
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AUTHORS (3)
MR
Masoud Rastgar
AB
Ali Bozorg
AS
Alireza Shakeri