Aromatic Polyamides for Pervaporation Application

Chan et al. carried out pervaporation experiments through membranes comprising of different poly(amide-sulfonamides) (PASA s) [76]. They found that the best separation factor was achieved with a membrane based on N,N, -bis(4-aminophenylsulfonyl)-l,3-diaminopropane and isophthaloyl chloride. However, since they produced dense membranes by solvent evaporation the fluxes for all of the membranes prepared were very low in the region of 0.007-0.034 kg/m h. 

Wang et al. reported a series of novel aromatic PAs (PA-23and PA-23B ) based on the 2,2-bis[4-(4-aminophenoxy)phenyl]propane and 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoro-propane with 

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