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Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications
Food packaging plastic waste is posing great threats to ecosystems, human health, and the planet's overall sustainability; therefore, research has been directed towards the fabrication of biodegradable food packaging materials. In this study, active and biodegradable oxalic acid (OA) crosslinked pol...
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2025
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| _version_ | 1867613424188391424 |
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| access_status_str | Open Access |
| author | Elaasar, Reem Hazem Fathy Anwar |
| author_browse | Elaasar, Reem Hazem Fathy Anwar |
| author_facet | Elaasar, Reem Hazem Fathy Anwar |
| author_sort | Elaasar, Reem Hazem Fathy Anwar |
| collection | Thesis |
| description | Food packaging plastic waste is posing great threats to ecosystems, human health, and the planet's overall sustainability; therefore, research has been directed towards the fabrication of biodegradable food packaging materials. In this study, active and biodegradable oxalic acid (OA) crosslinked poly(vinyl alcohol) (PVA)/chitosan (CS) composite films of different weight ratios were synthesized via the solvent casting technique and their food packaging properties were investigated. Owing to its water resistance and antibacterial superiority, the composite film with the ratio of OA chemically crosslinked PVA/CS 80:20 was elected to be coated with green tea extract (GTE) to ameliorate its antibacterial and antioxidant activities. The chemical crosslinking of PVA by OA and the intermolecular hydrogen bonding between PVA and CS were confirmed by FTIR spectroscopy. Surface roughness of the composite films mainly determined their antibacterial activities. Interestingly, CS provided the composite films with higher mechanical strength and stiffness along with ultraviolet (UV) barrier and antibacterial properties. Despite reducing the water resistance, barrier properties and thermal stability of the composite films, the values are comparable to literature and the produced films are of a great potential for food packaging applications. Furthermore, GTE coating further augmented the active properties of the elected composite film yielding it quite applicable for active food packaging purposes. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-3430 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:35:55.364Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-3430 Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications Elaasar, Reem Hazem Fathy Anwar Food packaging plastic waste is posing great threats to ecosystems, human health, and the planet's overall sustainability; therefore, research has been directed towards the fabrication of biodegradable food packaging materials. In this study, active and biodegradable oxalic acid (OA) crosslinked poly(vinyl alcohol) (PVA)/chitosan (CS) composite films of different weight ratios were synthesized via the solvent casting technique and their food packaging properties were investigated. Owing to its water resistance and antibacterial superiority, the composite film with the ratio of OA chemically crosslinked PVA/CS 80:20 was elected to be coated with green tea extract (GTE) to ameliorate its antibacterial and antioxidant activities. The chemical crosslinking of PVA by OA and the intermolecular hydrogen bonding between PVA and CS were confirmed by FTIR spectroscopy. Surface roughness of the composite films mainly determined their antibacterial activities. Interestingly, CS provided the composite films with higher mechanical strength and stiffness along with ultraviolet (UV) barrier and antibacterial properties. Despite reducing the water resistance, barrier properties and thermal stability of the composite films, the values are comparable to literature and the produced films are of a great potential for food packaging applications. Furthermore, GTE coating further augmented the active properties of the elected composite film yielding it quite applicable for active food packaging purposes. 2025-02-15T08:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/2388 https://fount.aucegypt.edu/context/etds/article/3430/viewcontent/Reem_Hazem_Fathy_Anwar_Elaasar_thesis.pdf Theses and Dissertations AUC Knowledge Fountain active food packaging biopolymers natural extracts sustainability biodegradability Food Science Materials Chemistry Polymer Chemistry |
| spellingShingle | active food packaging biopolymers natural extracts sustainability biodegradability Food Science Materials Chemistry Polymer Chemistry Elaasar, Reem Hazem Fathy Anwar Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications |
| title | Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications |
| title_full | Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications |
| title_fullStr | Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications |
| title_full_unstemmed | Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications |
| title_short | Tailor-designed Oxalic Acid-Crosslinked Poly(vinyl alcohol)/Chitosan Biodegradable Films for Active Food Packaging Applications |
| title_sort | tailor designed oxalic acid crosslinked poly vinyl alcohol chitosan biodegradable films for active food packaging applications |
| topic | active food packaging biopolymers natural extracts sustainability biodegradability Food Science Materials Chemistry Polymer Chemistry |
| url | https://fount.aucegypt.edu/etds/2388 https://fount.aucegypt.edu/context/etds/article/3430/viewcontent/Reem_Hazem_Fathy_Anwar_Elaasar_thesis.pdf |
| work_keys_str_mv | AT elaasarreemhazemfathyanwar tailordesignedoxalicacidcrosslinkedpolyvinylalcoholchitosanbiodegradablefilmsforactivefoodpackagingapplications |