Developing thin-film-composite forward osmosis membranes on the PES/SPSf substrate through interfacial polymerization
KAUST DepartmentWater Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
MetadataShow full item record
AbstractA new scheme has been developed to fabricate high-performance forward osmosis (FO) membranes through the interfacial polymerization reaction on porous polymeric supports. p-Phenylenediamine and 1,3,5-trimesoylchloride were adopted as the monomers for the in-situ polycondensation reaction to form a thin aromatic polyamide selective layer of 150 nm in thickness on the substrate surface, a lab-made polyethersulfone (PES)/sulfonated polysulfone (SPSf)-alloyed porous membrane with enhanced hydrophilicity. Under FO tests, the FO membrane achieved a higher water flux of 69.8 LMH when against deionized water and 25.2 LMH when against a model 3.5 wt % NaCl solution under 5.0 M NaCl as the draw solution in the pressure-retarded osmosis mode. The PES/SPSf thin-film-composite (TFC)-FO membrane has a smaller structural parameter S of 238 μm than those reported data. The morphology and topology of substrates and TFC-FO membranes have been studied by means of atomic force microscopy and scanning electronic microscopy. © 2011 American Institute of Chemical Engineers (AIChE).
SponsorsThe authors thank financial support from King Abdullah University of Science and Technology (KAUST) by Award No SA-C0005/UK-C0002, and National University of Singapore (NUS) for funding this research project with the grant number of and R-279-000-265-598. Special thanks are due to Dr. Youchang Xiao, Dr. Jincai Su, Mr. Shipeng Sun, and Ms. Rui Chin Ong for their valuable suggestions.