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Novel Polyester Amide Membranes Containing Biquinoline Units and Complex with Cu(I): Synthesis, Characterization, and Approbation for n-Heptane Isolation from Organic Mixtures

1
Saint Petersburg State University, Institute of Chemistry, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia
2
Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 Saint Petersburg, Russia
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(3), 645; https://doi.org/10.3390/polym12030645 (registering DOI)
Received: 11 February 2020 / Revised: 4 March 2020 / Accepted: 10 March 2020 / Published: 12 March 2020
(This article belongs to the Special Issue Polymeric Membrane Materials for Separation Liquid and Gas Mixtures)
The wide possibilities of designing a chemical structure and creating complexes with transition metals make polymers of heteroaromatic structure interesting objects, from both scientific and practical aspects. In this work, modern biquinoline-containing polymers, namely polyester amide (PEA) and its metal–polymer complex (PEA–Cu(I)), were synthesized and used to form dense flat membranes. A comparative study of their morphology, same physical properties (density, free volume, and contact angles), and thermomechanical characteristics was carried out. The transport properties of the modern membranes were studied during pervaporation, to solve a problem of n-heptane isolation from its binary mixtures with thiophene and methanol. It was shown that only the PEA membrane is selective for the separation of thiophene impurities from the mixture with n-heptane. In pervaporation of methanol/n-heptane mixture, the РЕА–Cu(I) membrane exhibits significantly higher pervaporation separation index, as compared with that of the РЕА membrane. View Full-Text
Keywords: polyester amide; metal–polymer complex; membranes; pervaporation; n-heptane isolation polyester amide; metal–polymer complex; membranes; pervaporation; n-heptane isolation
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Pulyalina, A.; Faykov, I.; Nesterova, V.; Goikhman, M.; Podeshvo, I.; Loretsyan, N.; Novikov, A.; Gofman, I.; Toikka, A.; Polotskaya, G. Novel Polyester Amide Membranes Containing Biquinoline Units and Complex with Cu(I): Synthesis, Characterization, and Approbation for n-Heptane Isolation from Organic Mixtures. Polymers 2020, 12, 645.

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