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

Autor:	Farooq Sher, Naveed Ahmed Khan, Tayyaba Noor, Muhammad Bilal Khan Niazi, Zaib Jahan, Ofaira Azhar, Naseem Iqbal, Tazien Rashid
Rok vydání:	2021
Předmět:	Thermogravimetric analysis Materials science Polymers and Plastics Organic chemistry 02 engineering and technology 010402 general chemistry 01 natural sciences Polyvinyl alcohol Article Crystallinity chemistry.chemical_compound QD241-441 Ultimate tensile strength sustainable polymers Thermal stability Nanocomposite General Chemistry 021001 nanoscience & nanotechnology MOFs 0104 chemical sciences Amorphous solid ZIF-67 chemistry Chemical engineering bio-nanocomposite films solvothermal synthesis 0210 nano-technology PVA/starch Zeolitic imidazolate framework
Zdroj:	Polymers, Vol 13, Iss 2307, p 2307 (2021) Polymers Volume 13 Issue 14
ISSN:	2073-4360
DOI:	10.3390/polym13142307
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd9fc649043e188950b6a5f18e09c751 https://doi.org/10.3390/polym13142307 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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