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Article

Metal Organic Frameworks Derived Sustainable Polyvinyl Alcohol/Starch Nanocomposite Films as Robust Materials for Packaging Applications

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Department of Chemical Engineering, School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan
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Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
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Department of Chemical Engineering, NFC Institute of Engineering and Fertilizer Research, Faisalabad 38000, Pakistan
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U.S.-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Science and Technology, Sector H-12, Islamabad 44000, Pakistan
*
Author to whom correspondence should be addressed.
Academic Editors: Nadia Lotti, Michelina Soccio, Alexey Iordanskii and Valentina Siracusa
Polymers 2021, 13(14), 2307; https://doi.org/10.3390/polym13142307
Received: 21 May 2021 / Revised: 8 July 2021 / Accepted: 12 July 2021 / Published: 14 July 2021
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. View Full-Text
Keywords: sustainable polymers; MOFs; ZIF-67; solvothermal synthesis; PVA/starch; bio-nanocomposite films sustainable polymers; MOFs; ZIF-67; solvothermal synthesis; PVA/starch; bio-nanocomposite films
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MDPI and ACS Style

Khan, N.A.; Niazi, M.B.K.; Sher, F.; Jahan, Z.; Noor, T.; Azhar, O.; Rashid, T.; Iqbal, N. Metal Organic Frameworks Derived Sustainable Polyvinyl Alcohol/Starch Nanocomposite Films as Robust Materials for Packaging Applications. Polymers 2021, 13, 2307. https://doi.org/10.3390/polym13142307

AMA Style

Khan NA, Niazi MBK, Sher F, Jahan Z, Noor T, Azhar O, Rashid T, Iqbal N. Metal Organic Frameworks Derived Sustainable Polyvinyl Alcohol/Starch Nanocomposite Films as Robust Materials for Packaging Applications. Polymers. 2021; 13(14):2307. https://doi.org/10.3390/polym13142307

Chicago/Turabian Style

Khan, Naveed A., Muhammad B.K. Niazi, Farooq Sher, Zaib Jahan, Tayyaba Noor, Ofaira Azhar, Tazien Rashid, and Naseem Iqbal. 2021. "Metal Organic Frameworks Derived Sustainable Polyvinyl Alcohol/Starch Nanocomposite Films as Robust Materials for Packaging Applications" Polymers 13, no. 14: 2307. https://doi.org/10.3390/polym13142307

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