Membranes based on polyimide–polyaniline nanocomposites for pervaporation of organic mixtures |
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| Authors: | G. A. Polotskaya T. K. Meleshko I. G. Sushchenko A. V. Yakimansky A. Yu. Pulyalina A. M. Toikka Z. Pientka |
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| Affiliation: | 1. Institute of Macromolecular Compounds, Russian Academy of Sciences, Saint Petersburg 199004, Russia;2. Department of Chemical Thermodynamics and Kinetics, Saint Petersburg State University, Petrodvoretz, Saint Petersburg 198504, Russia;3. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague 162 06, Czech Republic |
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| Abstract: | Polyimide–polyaniline nanocomposites were obtained by mixing poly{[4,4′‐bis(4″‐N‐phenoxy)diphenylsulfone]imide‐1,3‐bis(3,4‐dicarboxyphenoxy)benzene} (PI) and polyaniline (PANI) solutions in N‐methylpyrrolidone. These solutions were used for the preparation of homogeneous and composite membranes. Uniform distribution of PANI particles in the membranes, resulted from interactions between macromolecules, was confirmed by transmission electron microscopy. Membranes based on PI and PI–PANI were tested in pervaporation of binary organic mixtures: methanol/toluene and methanol/cyclohexane and showed a remarkable selectivity with respect to methanol. In both pervaporation processes, selectivity was improved in PANI‐containing membranes. Interactions between membrane polymers and liquid penetrants (methanol, toluene, and cyclohexane) were studied by measurements of surface tension, sorption, and pervaporation parameters. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 |
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| Keywords: | membranes pervaporation polyimide polyaniline |
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