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Polymers
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Polymers for Membrane Separation Process
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Polymers for Membrane Separation Process

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

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 2423

Special Issue Editors

Dr. Yaocihuatl Medina-Gonzalez

E-Mail Website
Guest Editor
CNRS Research Scientist, Laboratory of the Future, UMR CNRS Solvay 5258, 178 Avenue du Dr Albert Schweitzer, 33600 Pessac, France
Interests: chemical engineering; solvent engineering; polymeric membranes; membrane processes; new solvents for membranes fabrication
Dr. Clara Casado-Coterillo

E-Mail Website
Guest Editor
Department of Chemical and Biomolecular Engineering, Universidad de Cantabria, Santander, Spain
Interests: thin film composite membranes; CO2 selective membranes; ion-exchange membranes; membrane coated electrodes; biopolymer based membranes; mixed matrix membranes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is a pleasure for us to coordinate the Special Issue “Polymers for Membrane Separation Process” of Polymers (MDPI). This Special Issue is motivated by the ubiquitous presence of polymers in membrane synthesis and fabrication and the extensive use of polymer membranes in separation processes. The objective of this Special Issue is to cover traditional polymers for membranes fabrication (PVDF, Polysulfone, PTFE, Polyethylene, etc.) and more specific and special polymers such as biodegradable, biobased polymers used in membranes for separation processes (chitosan, etc.), the role of fabrication parameters in the performance of polymeric membranes in separation processes as for instance the use of new, biodegradable, neoteric and/or greener solvents and non-solvents used during membranes fabrication; the use of polymers in composite membranes for separation processes will also be addressed as well as polymers used for the fabrication of gas separation membranes. As the scope of this Issue is focused on the polymers all the membrane geometries will be taken into consideration.

Dr. Yaocihuatl Medina-Gonzalez
Dr. Clara Casado-Coterillo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • polymeric membranes
  • biodegradable polymers for membranes
  • asymmetric polymeric membranes
  • solvents
  • non-solvents for polymers
  • solvent exchange

Published Papers (2 papers)

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Research

18 pages, 5060 KiB  
Article
Gas Permeability through Polyimides: Unraveling the Influence of Free Volume, Intersegmental Distance and Glass Transition Temperature
by Alba Torres, Cenit Soto, Javier Carmona, Bibiana Comesaña-Gandara, Mónica de la Viuda, Laura Palacio, Pedro Prádanos, María Teresa Simorte, Inmaculada Sanz, Raúl Muñoz, Alberto Tena and Antonio Hernández
Polymers 2024, 16(1), 13; https://doi.org/10.3390/polym16010013 - 19 Dec 2023
Viewed by 890
Abstract
The relationships between gas permeability and free volume fraction, intersegmental distance, and glass transition temperature, are investigated. They are analyzed for He, CO2, O2, CH4, and N2 gases and for five similar polyimides with a wide [...] Read more.
The relationships between gas permeability and free volume fraction, intersegmental distance, and glass transition temperature, are investigated. They are analyzed for He, CO2, O2, CH4, and N2 gases and for five similar polyimides with a wide range of permeabilities, from very low to extremely high ones. It has been established here that there is an exponential relationship between permeability and the free volume fraction, and between permeability and the most probable intersegmental distance as measured by WAXS; in both cases, with an exponential coefficient that depends on the kinetic gas diameter as a quadratic polynomial and with a preexponential positive constant. Moreover, it has been proven that the intersegmental distance increases linearly with the free volume fraction. Finally, it has been established that the free volume fraction increases with the glass transition temperature for the polymers tested, and that they depend on each other in an approximate linear way. Full article
(This article belongs to the Special Issue Polymers for Membrane Separation Process)
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16 pages, 4946 KiB  
Article
Fluorine-Containing, Self-Assembled Graft Copolymer for Tuning the Hydrophilicity and Antifouling Properties of PVDF Ultrafiltration Membranes
by Seung Jae Moon, Young Jun Kim, Du Ru Kang, So Youn Lee and Jong Hak Kim
Polymers 2023, 15(17), 3623; https://doi.org/10.3390/polym15173623 - 01 Sep 2023
Viewed by 964
Abstract
Neat poly(vinylidene fluoride) (PVDF) ultrafiltration (UF) membranes exhibit poor water permeance and surface hydrophobicity, resulting in poor antifouling properties. Herein, we report the synthesis of a fluorine-containing amphiphilic graft copolymer, poly(2,2,2-trifluoroethyl methacrylate)-g-poly(ethylene glycol) behenyl ether methacrylate (PTFEMA-g-PEGBEM), hereafter referred [...] Read more.
Neat poly(vinylidene fluoride) (PVDF) ultrafiltration (UF) membranes exhibit poor water permeance and surface hydrophobicity, resulting in poor antifouling properties. Herein, we report the synthesis of a fluorine-containing amphiphilic graft copolymer, poly(2,2,2-trifluoroethyl methacrylate)-g-poly(ethylene glycol) behenyl ether methacrylate (PTFEMA-g-PEGBEM), hereafter referred to as PTF, and its effect on the structure, morphology, and properties of PVDF membranes. The PTF graft copolymer formed a self-assembled nanostructure with a size of 7–8 nm, benefiting from its amphiphilic nature and microphase separation ability. During the nonsolvent-induced phase separation (NIPS) process, the hydrophilic PEGBEM chains were preferentially oriented towards the membrane surface, whereas the superhydrophobic PTFEMA chains were confined in the hydrophobic PVDF matrix. The PTF graft copolymer not only increased the pore size and porosity but also significantly improved the surface hydrophilicity, flux recovery ratio (FRR), and antifouling properties of the membrane. The membrane performance was optimal at 5 wt.% PTF loading, with a water permeance of 45 L m−2 h−1 bar−1, a BSA rejection of 98.6%, and an FRR of 83.0%, which were much greater than those of the neat PVDF membrane. Notably, the tensile strength of the membrane reached 6.34 MPa, which indicated much better mechanical properties than those reported in the literature. These results highlight the effectiveness of surface modification via the rational design of polymer additives and the precise adjustment of the components for preparing membranes with high performance and excellent mechanical properties. Full article
(This article belongs to the Special Issue Polymers for Membrane Separation Process)
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