Fabrication of low pressure polyamide multi-layer membrane for decrease internal concentration polarization in Forward Osmosis process.

Today, internal concentration polarization is one of main preventives for development of Forward Osmosis process in different research and industrial fields particularly in water reuse (or water treatment) and desalination. The aim of this study is decrease in internal concentration polarization and as its result improve in FO membrane performance and efficiency that means high water flux and low salt reverse flux. For this purpose polyamide thin layers were directly formed on a polyester nonwoven backbone without presence of common polymeric support (e.g. Polysulfone, polyether sulfone and cellulose triacetate). Water flux and salt reverse flux was obtained about 60.18 and 188.511, representatively. Membranes structure and chemical properties were characterized by ATR IR spectra, SEM surface and cross-section images and Surface topographic AFM images.

کلیدواژه ها:

Internal concentration polarization ، multi-layer thin film ، polyamide ، forward Osmosis