Dear all;
I am looking forward to your suggestion to choose a new commercial FO membrane which I can use in FO setup to recovery the water from different aqueous solutions, and to compare its performance to my fabricated laboratory nano-composite membrane (pvdf-based membrane).
Thank you in advance
Read the following references
Reverse draw solute permeation in forward osmosis: modelling and experiments, Philip et. al., 2010
Influence of concentrative and dilutive internal concentration polarization on flux behaviour in forward osmosis, McCutcheon et. al., 2006
Nano gives the answer: breaking the bottleneck of internal concentration polarization with a nanofiber composite forward osmosis membrane for a high water production rate, Song et. al., 2011
Recently, polyamide-based thin film composite (TFC) membranes have been prepared for forward osmosis applications. TFC membrane formation is a two-step process. First a support membrane, typically composed mainly of polyethersulfone, is formed by phase inversion of precursor dope solution. Next, a thin (around 200nm) polymeric rejection layer is formed on top of the support membrane by interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC). A similar process has been used since the 1990ies to produce RO membranes. The difference between TFC FO and TFC RO membranes lies mainly is the support substrate, which for FO membranes is considerably more porous, more hydrophilic, and thinner.
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