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Abstract
Composite polyamide membranes are prepared using in-situ interfacial polymerization using mixed amine system comprising 1,4-phenylene diamine and pipperazine. Separation performance of the membranes are studied as a function of the concentration of amine and acid chloride, the concentration ratio of the amines, nature of the acid chloride, and the presence of surfactant and acid acceptor in the aqueous reagent. The effect of esterification and hydrazide reactions involving residual carboxylic acid groups in the polymeric membranes on the co-polymeric composite membrane performance is also studied. The membrane performance can be tailored easily by conversion of the residual reactive functional groups in post-treatment.
ACKNOWLEDGEMENTS
The authors wish to acknowledge the assistance provided by Shri Sai Laxman in carrying out some of the experiments reported in this paper.
Notes
Concentration of TMC: 0.3% (w/v).
Time in hexane-TMC solution: 60 seconds.
Concentration of Amine: 2.0% (w/v).
Time in hexane-TMC solution: 60 seconds.
Concentration of Amine: 2.0% (w/v).
Concentration of Acid chloride: 0.3% (w/v).
Concentration of TMC: 0.3% (w/v).
Concentration of TMC: 0.3% (w/v).
Concentration of TMC: 0.3% (w/v).