Fabrication of PSS/PDADMAC Polyelectrolyte Membrane via Layer-by-Layer (LbL) Technique for Forward Osmosis (FO) Application

Abstract:

In this study, FO membrane was fabricated by Layer-by-Layer (LbL) coating technique using Poly (sodium 4-styrene-sulfonate)(PSS) and Poly (diallyl-dimethylammoniumchloride) (PDADMAC) as the active polyelectrolytes. Different concentrations of polyelectrolytes and deposition time of polyelectrolytes were investigated. The success of the coated layer was confirmed using ATR-FTIR and FESEM images. The membrane performance was determined by water flux and reverse solute diffusion (RSD) using pure water and 1.75M Na₂SO₄ as feed and draw solution, respectively. It was observed that the highest water flux, 6.76 L/ was recorded at the lowest polyelectrolytes concentration and longer deposition time. Meanwhile, the minimum RSD was achieved by the membrane fabricated at the longest deposition time and highest polyelectrolyte concentration.

• Periodical: Key Engineering Materials (Volume 797)
• Pages: 13-19
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.797.13
• Online since: March 2019
• Authors: Mok Tze How, Mazrul Nizam Abu Seman*
• Keywords: Desalination, Forward Osmosis, LbL Technique, Reverse Salt Flux, Water Flux

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