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Correction published on 11 May 2020, see Symmetry 2020, 12(5), 799.
Article

Polyimide Asymmetric Membrane vs. Dense Film for Purification of MTBE Oxygenate by Pervaporation

1
Institute of Chemistry, Saint Petersburg State University, 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.
Symmetry 2020, 12(3), 436; https://doi.org/10.3390/sym12030436
Received: 17 February 2020 / Revised: 1 March 2020 / Accepted: 5 March 2020 / Published: 9 March 2020
(This article belongs to the Special Issue Asymmetric Membranes)
Membrane properties are determined by their morphology, which may be symmetric (dense) or asymmetric (dense/porous). Two membrane types based on the poly[(4,4′-oxydiphenylene)pyromelliteimide] (symmetric dense and asymmetric dense/porous) were prepared for a comparative study of morphology, physical properties, and transport characteristics in the pervaporation of methanol/MTBE mixture over a wide range of concentrations including the azeotropic composition. The asymmetric membrane is a good example of improving the transport properties of the polyimide by creating structure composed of a thin dense top layer on the surface of sponge-like microporous substrate. It was found that the use of the asymmetric membrane allows increasing the total flux in separation of azeotropic mixture by 15 times as compared with the dense membrane. View Full-Text
Keywords: asymmetric membrane; pervaporation; MTBE; polyimide; methanol asymmetric membrane; pervaporation; MTBE; polyimide; methanol
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MDPI and ACS Style

Pulyalina, A.; Tataurov, M.; Faykov, I.; Rostovtseva, V.; Polotskaya, G. Polyimide Asymmetric Membrane vs. Dense Film for Purification of MTBE Oxygenate by Pervaporation. Symmetry 2020, 12, 436. https://doi.org/10.3390/sym12030436

AMA Style

Pulyalina A, Tataurov M, Faykov I, Rostovtseva V, Polotskaya G. Polyimide Asymmetric Membrane vs. Dense Film for Purification of MTBE Oxygenate by Pervaporation. Symmetry. 2020; 12(3):436. https://doi.org/10.3390/sym12030436

Chicago/Turabian Style

Pulyalina, Alexandra, Maksim Tataurov, Ilya Faykov, Valeriia Rostovtseva, and Galina Polotskaya. 2020. "Polyimide Asymmetric Membrane vs. Dense Film for Purification of MTBE Oxygenate by Pervaporation" Symmetry 12, no. 3: 436. https://doi.org/10.3390/sym12030436

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