Special Issue "Polymeric Membrane Materials for Separation Liquid and Gas Mixtures"

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: 30 June 2020.

Special Issue Editors

Prof. Alexander Toikka
E-Mail Website
Guest Editor
Head of the Department of Chemical Thermodynamics and Kinetics, Institute of Chemistry, St. Petersburg State University, Universitetskiy prospect, 26, Peterhof, 198504, Saint Petersburg, Russia
Interests: polymeric membranes; pervaporation; gas separation; ultrafiltration; thermodynamic and thermochemical properties; non-equilibrium thermodynamics; modeling
Dr. Alexandra Pulyalina
E-Mail Website
Guest Editor
Department of Chemical Thermodynamics and Kinetics, Institute of Chemistry, St. Petersburg State University, Universitetskiy prospect, 26, Peterhof, Saint Petersburg, 198504, Russia
Interests: polymeric membranes synthesis and application; pervaporation; gas permeation; ultrafiltration; sorption; physical chemistry of membrane transport

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the creation and study of new materials and methods, and of their preparation to increase the stability and performance of polymer membranes. The membrane separation of liquid and gas mixtures is now effectively used to solve important problems of energy- and resource-saving technologies, including the tasks of green chemistry. The possibilities to flexibly change the structure of polymer and composite membrane materials allow for obtaining new high-performance membranes, including cases when other methods of separation cannot be applied or are not sufficiently effective. For example, pervaporation offers the possibility of separating the azeotropic and closely boiling mixtures that are difficult to separate by the usual distillation. The effectiveness of membrane separation is primarily determined by the choice of membrane materials. For applied tasks of chemical engineering, other performance characteristics are important, namely: resistance in an aggressive environment, the stability of membrane properties, and others. The subject of the Special Issue is the presentation of advanced polymeric membrane materials for the pervaporation, ultrafiltration, and gas separation; the results of a detailed study of their thermomechanical, physical properties, chemical stability, and transport parameters; and the features of trans-membrane processes involving new polymeric membranes.

Prof. Alexander Toikka
Dr. Alexandra Pulyalina
Guest Editors

Keywords

  • innovative polymers for membranes
  • polymeric and composite membrane materials
  • pervaporation
  • ultrafiltration
  • gas separation
  • features of trans-membrane processes

Published Papers (4 papers)

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Research

Open AccessArticle
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(3), 645; https://doi.org/10.3390/polym12030645 (registering DOI) - 12 Mar 2020
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Polymeric Membrane Materials for Separation Liquid and Gas Mixtures)
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Open AccessArticle
Improved Desulfurization Performance of Polyethyleneglycol Membrane by Incorporating Metal Organic Framework CuBTC
Polymers 2020, 12(2), 414; https://doi.org/10.3390/polym12020414 - 11 Feb 2020
Abstract
In this paper, copper benzene-1,3,5-tricarboxylate (CuBTC) was incorporated into polyethylenglyol (PEG) to prepare a mixed matrix membrane (MMM) for pervaporation desulfurization. The characterization results showed that the prepared CuBTC particles had an ideal octahedral shape and micropores. The Cu2+ in CuBTC interacts [...] Read more.
In this paper, copper benzene-1,3,5-tricarboxylate (CuBTC) was incorporated into polyethylenglyol (PEG) to prepare a mixed matrix membrane (MMM) for pervaporation desulfurization. The characterization results showed that the prepared CuBTC particles had an ideal octahedral shape and micropores. The Cu2+ in CuBTC interacts with thiophene via π-complexation, thus enhancing the separation performance of the hybrid membranes. The effect of CuBTC content and the operating condition on the pervaporation performance of the MMMs was investigated. An optimal pervaporation separation performance was acquired with a permeation flux of 2.21 kg/(m2·h) and an enrichment factor of 8.79, which were increased by 100% and 39% compared with the pristine PEG membrane. Moreover, the CuBTC-filled PEG membrane showed a good stability in the long-term desulfurization under a high operating temperature of 75 °C for five days. Full article
(This article belongs to the Special Issue Polymeric Membrane Materials for Separation Liquid and Gas Mixtures)
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Open AccessArticle
Transport Properties of Thermoplastic R-BAPB Polyimide: Molecular Dynamics Simulations and Experiment
Polymers 2019, 11(11), 1775; https://doi.org/10.3390/polym11111775 - 29 Oct 2019
Abstract
The present work evaluates the transport properties of thermoplastic R-BAPB polyimide based on 1,3-bis(3,3′,4,4′-dicarboxyphenoxy)benzene (dianhydride R) and 4,4′-bis(4-aminophenoxy)biphenyl (diamine BAPB). Both experimental studies and molecular dynamics simulations were applied to estimate the diffusion coefficients and solubilities of various gases, such as helium (He), [...] Read more.
The present work evaluates the transport properties of thermoplastic R-BAPB polyimide based on 1,3-bis(3,3′,4,4′-dicarboxyphenoxy)benzene (dianhydride R) and 4,4′-bis(4-aminophenoxy)biphenyl (diamine BAPB). Both experimental studies and molecular dynamics simulations were applied to estimate the diffusion coefficients and solubilities of various gases, such as helium (He), oxygen (O2), nitrogen (N2), and methane (CH4). The validity of the results obtained was confirmed by studying the correlation of the experimental solubilities and diffusion coefficients of He, O2, and N2 in R-BAPB, with their critical temperatures and the effective sizes of the gas molecules, respectively. The solubilities obtained in the molecular dynamics simulations are in good quantitative agreement with the experimental data. A good qualitative relationship between the simulation results and the experimental data is also observed when comparing the diffusion coefficients of the gases. Analysis of the Robeson plots shows that R-BAPB has high selectivity for He, N2, and CO2 separation from CH4, which makes it a promising polymer for developing gas-separation membranes. From this point of view, the simulation models developed and validated in the present work may be put to effective use for further investigations into the transport properties of R-BAPB polyimide and nanocomposites based on it. Full article
(This article belongs to the Special Issue Polymeric Membrane Materials for Separation Liquid and Gas Mixtures)
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Open AccessArticle
Asymmetric Membranes Based on Copolyheteroarylenes with Imide, Biquinoline, and Oxazinone Units: Formation and Characterization
Polymers 2019, 11(10), 1542; https://doi.org/10.3390/polym11101542 - 22 Sep 2019
Abstract
Modern ultrafiltration requires novel perfect membranes with narrow pore size, high porosity, and minimal pore tortuosity to achieve high separation performance. In this work, copolyamic acid (co-PAA) was synthesized and used for the preparation of asymmetric porous membranes by phase inversion technique. Several [...] Read more.
Modern ultrafiltration requires novel perfect membranes with narrow pore size, high porosity, and minimal pore tortuosity to achieve high separation performance. In this work, copolyamic acid (co-PAA) was synthesized and used for the preparation of asymmetric porous membranes by phase inversion technique. Several co-PAA membranes were heated up to 250 °C; during heating, they undergo solid-phase transformation into co-polybenzoxazinoneimide (co-PBOI) via dehydration and cyclization. Comparative characterization of both co-PAA and co-PBOI membranes was realized by scanning electron microscopy, mechanical testing, thermogravimetric analysis, and ultrafiltration experiments. Membrane calibration was carried out using a mixture of seven proteins with different molecular weights. During heat treatment, the molecular weight cut-off of the membranes decreased from 20 × 103 g/mol (co-PAA) to 3 × 103 g/mol (co-PBOI). Abnormally low dispersions of rejection (0.3 for co-PAA and 0.45 for co-PBOI) were observed for the studied membranes; this fact indicates that the membranes possess enhanced resolving power. Full article
(This article belongs to the Special Issue Polymeric Membrane Materials for Separation Liquid and Gas Mixtures)
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