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Polymers
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Polymers in Metal–Organic Frameworks
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Polymers in Metal–Organic Frameworks

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

Deadline for manuscript submissions: closed (25 February 2022) | Viewed by 5179

Special Issue Editor

Prof. Dr. Yu Fu

E-Mail Website
Guest Editor
Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
Interests: metal–organic frameworks (MOFs); MOF-based catalysts; catalytic processes; hierarchical structure; interface assembly/synthesis

Special Issue Information

Dear Colleagues,

Metal-organic frameworks (MOFs) are a novel class of crystalline porous materials assembled by metal ions/clusters and organic ligands. MOFs have been at the forefront of materials science research, because of their advantageous properties, such as ultra-high porosity, designable structures, and tunable functions. Over the last two decades, the research into MOFs has greatly pushed the limit of these crystalline porous materials, enabling them to gain a wide range of applications, including catalyst, storage, separation, and purification.

In addition to adjusting primary MOFs, one can further expand their structural diversity and enhance their performance through the construction of composites. As a kind of fascinating multifunctional materials, the introduction of polymers into MOFs could collide with unique sparks, creating myriad marvellous architectures and properties. For example, in-situ polymerization within MOFs channels can endow polymers with topologies and structures different than those synthesized in the solution and bulk phase. Modification of polymers on the surface of the MOFs or onto ligands and metal-oxygen nodes can produce synergistic effects, bringing out non-native functionalities. Utilization of polymers as matrix to blend MOFs can prepare mixed matrix membranes (MMMs), which contain the adjustability of the polymers while retaining the MOFs intrinsic transport channels to facilitate molecular permeability. More intriguingly, polymers can be directly used as ligands to synthesize a unique class of MOFs-polymers composites, that break the doctrine that linear amorphous polymers cannot be turned into crystalline materials with high porosity. The great potential of the advanced polymers-MOFs composite materials has been successfully expanded into a series of important applications, such as gas separation, water purification, catalysis, sensing, and so on, indicating that the area is highly active and eminently practical.

Considering the great significance of this theme, this Special Issue is about to present a selection of original research papers and reviews articles emphasizing synthetic techniques, novel design and structures, unique natures and important applications of polymers combined with MOFs. The following keywords are listed as references to help prepare the submission, but any relevant work regarding polymers in MOFs, whose topic may not be explicitly mentioned in this list, is encouraged and welcomed.

Best regards
Prof.Dr. Yu Fu
Guest Editor

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

  • polymers
  • metal-organic frameworks (MOFs)
  • polymers-MOFs composites
  • mixed matrix membrane
  • polymer-grafted MOFs
  • polymerizations in MOFs
  • polymers templating MOFs
  • polyMOFs

Published Papers (2 papers)

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Research

9 pages, 1961 KiB  
Article
Iodine Immobilized UiO-66-NH2 Metal-Organic Framework as an Effective Antibacterial Additive for Poly(ε-caprolactone)
by Wei Chen, Ping Zhu, Yating Chen, Yage Liu, Liping Du and Chunsheng Wu
Polymers 2022, 14(2), 283; https://0-doi-org.brum.beds.ac.uk/10.3390/polym14020283 - 11 Jan 2022
Cited by 18 | Viewed by 2380
Abstract
Iodine has been widely used as an effective disinfectant with broad-spectrum antimicrobial potency. However, the application of iodine in an antibacterial polymer remains challenging due to its volatile nature and poor solubility. Herein, iodine immobilized UiO-66-NH2 metal-organic framework (MOF) (UiO66@I2) [...] Read more.
Iodine has been widely used as an effective disinfectant with broad-spectrum antimicrobial potency. However, the application of iodine in an antibacterial polymer remains challenging due to its volatile nature and poor solubility. Herein, iodine immobilized UiO-66-NH2 metal-organic framework (MOF) (UiO66@I2) with a high loading capacity was synthesized and used as an effective antibacterial additive for poly(ε-caprolactone) (PCL). An orthogonal design approach was used to achieve the optimal experiments’ conditions in iodine adsorption. UiO66@I2 nanoparticles were added to the PCL matrix under ultrasonic vibration and evaporated the solvent to get a polymer membrane. The composites were characterized by SEM, XRD, FTIR, and static contact angle analysis. UiO-66-NH2 nanoparticles have a high iodine loading capacity, up to 18 wt.%. The concentration of iodine is the most important factor in iodine adsorption. Adding 0.5 wt.% or 1.0 wt.% (equivalent iodine content) of UiO66@I2 to the PCL matrix had no influence on the structure of PCL but reduces the static water angle. The PCL composites showed strong antibacterial activities against Staphylococcus aureus and Escherichia coli. In contrast, the same content of free iodine/PCL composites had no antibacterial activity. The difference in the antibacterial performance was due to the different iodine contents in the polymer composites. It was found that MOF nanoparticles could retain most of the iodine during the sample preparation and storage, while there was few iodine left in the free iodine/PCL composites. This study offers a common and simple way to immobilize iodine and prepare antibacterial polymers with low antiseptic content that would reduce the influence of an additive on polymers’ physical properties. Full article
(This article belongs to the Special Issue Polymers in Metal–Organic Frameworks)
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9 pages, 2710 KiB  
Article
Preparation of Highly Porous Thiophene-Containing DUT-68 Beads for Adsorption of CO2 and Iodine Vapor
by Songtao Xiao, Menglin Li, Haifeng Cong, Lingyu Wang, Xiang Li and Wen Zhang
Polymers 2021, 13(23), 4075; https://0-doi-org.brum.beds.ac.uk/10.3390/polym13234075 - 24 Nov 2021
Cited by 5 | Viewed by 2310
Abstract
Zirconium-based metal-organic frameworks (Zr-MOFs) have great structural stability and offer great promise in the application of gas capture. However, the powder nature of MOF microcrystallines hinders their further industrial-scale applications in fluid-phase separations. Here, Zr-based DUT-68 was structured into nontoxic and eco-friendly alginate [...] Read more.
Zirconium-based metal-organic frameworks (Zr-MOFs) have great structural stability and offer great promise in the application of gas capture. However, the powder nature of MOF microcrystallines hinders their further industrial-scale applications in fluid-phase separations. Here, Zr-based DUT-68 was structured into nontoxic and eco-friendly alginate beads, and the gas capture properties were evaluated by CO2 and volatile iodine. DUT-68 beads were synthesized via a facile and versatile cross-linked polymerization of sodium alginate with calcium ions. The composite beads keep the structural integrity and most of the pore accessibility of DUT-68. The resulting DUT-68@Alginate (2:1) porous bead processes a surface area of 541 m2/g and compressive strength as high as 1.2 MPa, and the DUT-68 crystals were well-dispersed in the alginate networks without agglomeration. The DUT-68@Alginate bead with a 60% weight ratio of MOFs exhibits a high carbon dioxide capacity (1.25 mmol/g at 273 K), as well as an excellent high adsorption capacity for iodine, reaching up to 0.65 g/g at 353 K. This work provides a method to construct thiophene-contained composite beads with millimeter sizes for the capture of gases in potential industrial applications. Full article
(This article belongs to the Special Issue Polymers in Metal–Organic Frameworks)
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