Nanoporous polyethersulfone (PES) membrane with enhanced flux applied in forward osmosis process
- Nanoporous polyethersulfone (PES) membrane with enhanced flux applied in forward osmosis process
- 유영범; 서선근; 김인철; 이석헌
- Polyethersulfone; Nanoporous; Forward osmosis membrane; Water flux; Reverse solute flux
- Issue Date
- Journal of membrane science
- VOL 375, NO 1-2, 63-68
- A forward osmosis (FO) membrane process uses the natural phenomenon of osmosis, which occurs when
two solutions of differing concentration are placed on opposite sides of a semipermeable membrane.
Therefore, osmotic pressure is highly influenced by the properties of the semipermeable membrane in
an FO membrane process. In this study, the properties of commercial polyamide (PA) and cellulose triacetate
(CTA) membranes were analyzed, and the water flux and reverse solute flux were evaluated
in FO mode. The major properties of an FO membrane that enhance its performance are its thickness,
hydrophilicity, and structure. This work developed a high-performance polyethersulfone (PES) membrane
for FO membrane process applications. The PES membrane consists of an active layer formed atop
a support layer that includes a backing filled with polymer. The water flux was maximized by forming a
loose finger-like structure and generating nano-sized pores to increase porosity. The reverse solute flux
was minimized by maintaining the thickness of the support layer including the backing. The performance
of the PES membrane was compared with that of commercial HTI-CTA membrane. The properties of the
PES membrane attributed to the high water flux and low reverse solute flux.
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