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Liu B, Zhang S, Li M, Wang Y, Mei D. Metal-Organic Framework/Polyvinyl Alcohol Composite Films for Multiple Applications Prepared by Different Methods. MEMBRANES 2023; 13:755. [PMID: 37755178 PMCID: PMC10537366 DOI: 10.3390/membranes13090755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/13/2023] [Accepted: 08/18/2023] [Indexed: 09/28/2023]
Abstract
The incorporation of different functional fillers has been widely used to improve the properties of polymeric materials. The polyhydroxy structure of PVA with excellent film-forming ability can be easily combined with organic/inorganic multifunctional compounds, and such an interesting combining phenomenon can create a variety of functional materials in the field of materials science. The composite membrane material obtained by combining MOF material with high porosity, specific surface area, and adjustable structure with PVA, a non-toxic and low-cost polymer material with good solubility and biodegradability, can combine the processability of PVA with the excellent performance of porous filler MOFs, solving the problem that the poor machinability of MOFs and the difficulty of recycling limit the practical application of powdered MOFs and improving the physicochemical properties of PVA, maximizing the advantages of the material to develop a wider range of applications. Firstly, we systematically summarize the preparation of MOF/PVA composite membrane materials using solution casting, electrostatic spinning, and other different methods for such excellent properties, in addition to discussing in detail the various applications of MOF/PVA composite membranes in water treatment, sensing, air purification, separation, antibacterials, and so on. Finally, we conclude with a discussion of the difficulties that need to be overcome during the film formation process to affect the performance of the composite film and offer encouraging solutions.
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Affiliation(s)
| | - Shuhua Zhang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; (B.L.); (M.L.); (Y.W.)
| | | | | | - Dajiang Mei
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; (B.L.); (M.L.); (Y.W.)
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Metal Organic Frameworks Derived Sustainable Polyvinyl Alcohol/Starch Nanocomposite Films as Robust Materials for Packaging Applications. Polymers (Basel) 2021; 13:polym13142307. [PMID: 34301062 PMCID: PMC8309366 DOI: 10.3390/polym13142307] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/08/2021] [Accepted: 07/12/2021] [Indexed: 12/11/2022] Open
Abstract
Bio-nanocomposites-based packaging materials have gained significance due to their prospective application in rising areas of packaged food. This research aims to fabricate biodegradable packaging films based upon polyvinyl alcohol (PVA) and starch integrated with metal-organic frameworks (MOFs) or organic additives. MOFs offer unique features in terms of surface area, mechanical strength, and chemical stability, which make them favourable for supporting materials used in fabricating polymer-based packaging materials. zeolitic imidazolate frameworks (ZIFs) are one of the potential candidates for this application due to their highly conductive network with a large surface area and high porosity. Present research illustrates a model system based on ZIF-67 (C8H10N4Co) bearing 2–10 wt.% loading in a matrix of PVA/starch blend with or without pyrolysis to probe the function of intermolecular interaction in molecular packing, tensile properties, and glass transition process. ZIF-67 nanoparticles were doped in a PVA/starch mixture, and films were fabricated using the solution casting method. It was discovered through scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) that addition of ZIF-67 and pyrolyzed ZIF-67 changed and enhanced the thermal stability of the membrane. Moreover, 2–10 wt.% loading of ZIF-67 effected the thermal stability, owing to an interlayer aggregation of ZIF-67. The membranes containing pyrolyzed ZIF-67 showed mechanical strength in the order of 25 MPa in a moderate loading of pyrolyzed ZIF-67 (i.e., at 4 wt.%). The crystallinity enhanced by an increment in ZIF-67 loading. On the other hand, pyrolyzed ZIF-67 carbon became amorphous because of the inert environment and elevated temperature. The surface area also increased after the pyrolysis, which helped to increase the strength of the composite films.
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Silbernagl D, Ghasem Zadeh Khorasani M, Cano Murillo N, Elert AM, Sturm H. Bulk chemical composition contrast from attractive forces in AFM force spectroscopy. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2021; 12:58-71. [PMID: 33564603 PMCID: PMC7849247 DOI: 10.3762/bjnano.12.5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 12/10/2020] [Indexed: 05/08/2023]
Abstract
A key application of atomic force microscopy (AFM) is the measurement of physical properties at sub-micrometer resolution. Methods such as force-distance curves (FDCs) or dynamic variants (such as intermodulation AFM (ImAFM)) are able to measure mechanical properties (such as the local stiffness, k r) of nanoscopic heterogeneous materials. For a complete structure-property correlation, these mechanical measurements are considered to lack the ability to identify the chemical structure of the materials. In this study, the measured attractive force, F attr, acting between the AFM tip and the sample is shown to be an independent measurement for the local chemical composition and hence a complete structure-property correlation can be obtained. A proof of concept is provided by two model samples comprised of (1) epoxy/polycarbonate and (2) epoxy/boehmite. The preparation of the model samples allowed for the assignment of material phases based on AFM topography. Additional chemical characterization on the nanoscale is performed by an AFM/infrared-spectroscopy hybrid method. Mechanical properties (k r) and attractive forces (F attr) are calculated and a structure-property correlation is obtained by a manual principle component analysis (mPCA) from a k r/F attr diagram. A third sample comprised of (3) epoxy/polycarbonate/boehmite is measured by ImAFM. The measurement of a 2 × 2 µm cross section yields 128 × 128 force curves which are successfully evaluated by a k r/F attr diagram and the nanoscopic heterogeneity of the sample is determined.
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Affiliation(s)
- Dorothee Silbernagl
- BAM Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin, Germany
| | | | - Natalia Cano Murillo
- BAM Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin, Germany
| | - Anna Maria Elert
- BAM Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin, Germany
| | - Heinz Sturm
- BAM Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin, Germany
- TU Berlin, IWF, Pascalstr. 8–9, 10587 Berlin, Germany
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Padarthi Y, Mohanta S, Gupta J, Neogi S. Assessment of transport kinetics and chemo-mechanical properties of GF/Epoxy composite under long term exposure to sulphuric acid. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2020.109436] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Meinardi F, Ballabio M, Yanai N, Kimizuka N, Bianchi A, Mauri M, Simonutti R, Ronchi A, Campione M, Monguzzi A. Quasi-thresholdless Photon Upconversion in Metal-Organic Framework Nanocrystals. NANO LETTERS 2019; 19:2169-2177. [PMID: 30726093 DOI: 10.1021/acs.nanolett.9b00543] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Photon upconversion based on sensitized triplet-triplet annihilation ( sTTA) is considered as a promising strategy for the development of light-managing materials aimed to enhance the performance of solar devices by recovering unused low-energy photons. Here, we demonstrate that, thanks to the fast diffusion of excitons, the creation of triplet pairs in metal-organic framework nanocrystals ( nMOFs) with size smaller than the exciton diffusion length implies a 100% TTA yield regardless of the illumination condition. This makes each nMOF a thresholdless, single-unit annihilator. We develop a kinetic model for describing the upconversion dynamics in a nanocrystals ensemble, which allows us to define the threshold excitation intensity Ithbox required to reach the maximum conversion yield. For materials based on thresholdless annihilators, Ithbox is determined by the statistical distribution of the excitation energy among nanocrystals. The model is validated by fabricating a nanocomposite material based on nMOFs, which shows efficient upconversion under a few percent of solar irradiance, matching the requirements of real life solar technologies. The statistical analysis reproduces the experimental findings, and represents a general tool for predicting the optimal compromise between dimensions and concentration of nMOFs with a given crystalline structure that minimizes the irradiance at which the system starts to fully operate.
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Affiliation(s)
- F Meinardi
- Dipartimento di Scienza dei Materiali , Università degli Studi Milano-Bicocca , via R. Cozzi 53 , 20125 Milano , Italy
| | - M Ballabio
- Dipartimento di Scienza dei Materiali , Università degli Studi Milano-Bicocca , via R. Cozzi 53 , 20125 Milano , Italy
| | - N Yanai
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS) , Kyushu University , Moto-oka 744 , Nishi-ku, Fukuoka 819-0395 , Japan
| | - N Kimizuka
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS) , Kyushu University , Moto-oka 744 , Nishi-ku, Fukuoka 819-0395 , Japan
| | - A Bianchi
- Dipartimento di Scienza dei Materiali , Università degli Studi Milano-Bicocca , via R. Cozzi 53 , 20125 Milano , Italy
| | - M Mauri
- Dipartimento di Scienza dei Materiali , Università degli Studi Milano-Bicocca , via R. Cozzi 53 , 20125 Milano , Italy
| | - R Simonutti
- Dipartimento di Scienza dei Materiali , Università degli Studi Milano-Bicocca , via R. Cozzi 53 , 20125 Milano , Italy
| | - A Ronchi
- Dipartimento di Scienza dei Materiali , Università degli Studi Milano-Bicocca , via R. Cozzi 53 , 20125 Milano , Italy
| | - M Campione
- Department of Earth and Environmental Sciences , Università degli Studi Milano-Bicocca , Piazza della Scienza 4 , 20126 Milano , Italy
| | - A Monguzzi
- Dipartimento di Scienza dei Materiali , Università degli Studi Milano-Bicocca , via R. Cozzi 53 , 20125 Milano , Italy
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Cao X, Wang Z, Qiao Z, Zhao S, Wang J. Penetrated COF Channels: Amino Environment and Suitable Size for CO 2 Preferential Adsorption and Transport in Mixed Matrix Membranes. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5306-5315. [PMID: 30607936 DOI: 10.1021/acsami.8b16877] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Developing mixed matrix membranes (MMMs) is challenging because the interface between different matrices often forms undesirable structures. Herein, we demonstrate a method of creating suitable CO2-selective channels based on interface regulation that greatly enhances membrane separation performance. The poly(vinylamine), which also acts as a polymer matrix, was immobilized onto covalent organic frameworks (COFs) to obtain polymer-COF hybrid materials (COFp). The COFp and polymer matrix are highly compatible because they have the same segment. The polymer matrix was induced to penetrate the oversized COFp, resulting in an amino-environmental pore wall and appropriately sized CO2-selective channels dispersed in MMMs. The MMMs exhibited satisfactory membrane performance for CO2/N2, CO2/CH4, and CO2/H2 separation. A CO2 transport model for preferential adsorption and transport is clearly presented for the first time. The membrane separation mechanism is also discussed. This work demonstrates potential applications for material, interface, and membrane investigations.
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