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Polymers
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Polymer and Metal Organic Framework Membranes
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Polymer and Metal Organic Framework Membranes

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

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 4014

Special Issue Editors

Dr. Ahmad Rahimpour

E-Mail Website
Guest Editor
Department of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
Interests: polymer membranes; metal organic frameworks; separation processes; water treatment; gas separation
Special Issues, Collections and Topics in MDPI journals
Dr. Mark Elliott

E-Mail Website
Guest Editor
Department of Civil, Construction and Environmental Engineering, University of Alabama, Tuscaloosa, AL, USA
Interests: water; environmental engineering; on-site and decentralized wastewater treatment; ultraviolet disinfection; polymers
Dr. Alberto Tiraferri

E-Mail Website
Guest Editor
Department of Environment, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
Interests: environmental phenomena occurring at the solid/water interface and the engineering applications involving these phenomena; with special focus on water and wastewater separation using membranes; desalination; membrane fouling mechanisms; the coupling of membrane processes with advanced oxidation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Polymeric membranes have been extensively employed for gas and liquid separation, mainly due to their high performance in terms of permeability and selectivity. However, the issue of the trade-off between the selectivity and permeability as well as the fouling/biofouling propensity have limited their use in various applications. Therefore, developing new polymeric membranes are still necessary to overcome this limitation. The unique features of metal–organic frameworks (MOFs) as porous materials make them attractive candidates for application in polymer membranes for a targeted application. MOF/polymer hybrid membranes are promising for energy-efficient gas separations and antifouling liquid purification. In addition, antibacterial membranes can be produced by combining the relevant MOF with polymer matrix. Despite the many merits of MOF/polymer hybrid membranes, more advanced MOF/polymer hybrid-membranes should be developed to address the issue of scaling up these kind of hybrid membranes, economically, for large-scale industrial applications. Accordingly, this Special Issue aims to highlight new developments in the theory, experimental methods and applications of MOF/polymer hybrid-membranes to address the above challenges.

Dr. Ahmad Rahimpour
Dr. Alberto Tiraferri
Dr. Mark Elliott
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

  • hybrid membrane
  • polymer
  • metal–organic framework
  • antibacterial
  • gas separation
  • liquid separation
  • fouling mitigation

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Published Papers (1 paper)

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Research

18 pages, 6447 KiB  
Article
Design and Gas Separation Performance of Imidazolium Poly(ILs) Containing Multivalent Imidazolium Fillers and Crosslinking Agents
by Kathryn E. O’Harra, Emily M. DeVriese, Erika M. Turflinger, Danielle M. Noll and Jason E. Bara
Polymers 2021, 13(9), 1388; https://doi.org/10.3390/polym13091388 - 24 Apr 2021
Cited by 14 | Viewed by 3511
Abstract
This work introduces a series of vinyl-imidazolium-based polyelectrolyte composites, which were structurally modified via impregnation with multivalent imidazolium-benzene ionic liquids (ILs) or crosslinked with novel cationic crosslinkers which possess internal imidazolium cations and vinylimidazolium cations at the periphery. A set of eight [C [...] Read more.
This work introduces a series of vinyl-imidazolium-based polyelectrolyte composites, which were structurally modified via impregnation with multivalent imidazolium-benzene ionic liquids (ILs) or crosslinked with novel cationic crosslinkers which possess internal imidazolium cations and vinylimidazolium cations at the periphery. A set of eight [C4vim][Tf2N]-based membranes were prepared via UV-initiated free radical polymerization, including four composites containing di-, tri-, tetra-, and hexa-imidazolium benzene ILs and four crosslinked derivatives which utilized tri- and tetra- vinylimidazolium benzene crosslinking agents. Structural and functional characterizations were performed, and pure gas permeation data were collected to better understand the effects of “free” ILs dispersed in the polymeric matrix versus integrated ionic crosslinks on the transport behaviors of these thin films. These imidazolium PIL:IL composites exhibited moderately high CO2 permeabilities (~20–40 Barrer), a 4–7× increase relative to corresponding neat PIL, with excellent selectivities against N2 or CH4. The addition of imidazolium-benzene fillers with increased imidazolium content were shown to correspondingly enhance CO2 solubility (di- < tri- < tetra- < hexa-), with the [C4vim][Tf2N]: [Hexa(Im+)Benz ][Tf2N] composite showing the highest CO2 permeability (PCO2 = 38.4 Barrer), while maintaining modest selectivities (αCO2/CH4 = 20.2, αCO2/N2 = 23.6). Additionally, these metrics were similarly improved with the integration of more ionic content bonded to the polymeric matrix; increased PCO2 with increased wt% of the tri- and tetra-vinylimidazolium benzene crosslinking agent was observed. This study demonstrates the intriguing interactions and effects of ionic additives or crosslinkers within a PIL matrix, revealing the potential for the tuning of the properties and transport behaviors of ionic polymers using ionic liquid-inspired small molecules. Full article
(This article belongs to the Special Issue Polymer and Metal Organic Framework Membranes)
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