Upcycling Biodegradable PVA/Starch Film to a Bacterial Biopigment and Biopolymer
| Autor: | Ivana Aleksic, Sanja Stevanović, Brana Pantelic, Margaret Brennan Fournet, James J. Murray, Jasmina Nikodinovic-Runic, Marijana Ponjavic, Vukasin Jankovic |
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| Přispěvatelé: | Athlone Institute of Technology, European Union’s Horizon 2020 Research and Innovation Programme under grant agreement No. 870292 (BioICEP), which is in connection with the National Natural Science Foundation of China (Nos. 31961133016, 31961133015, and 31961133014) |
| Rok vydání: | 2022 |
| Předmět: |
Polymers and Plastics
Bioconversion Starch Upcycling Organic chemistry Mechanical properties biopolymers 02 engineering and technology engineering.material mechanical properties 010402 general chemistry 01 natural sciences Polyvinyl alcohol biodegradation Article Polyhydroxybutyrate chemistry.chemical_compound QD241-441 Biopolymers biopigments upcycling Biopigments Thermoplastic starch General Chemistry Biodegradation 021001 nanoscience & nanotechnology 6. Clean water 0104 chemical sciences Polyester Low-density polyethylene chemistry Chemical engineering 13. Climate action thermoplastic starch PVA engineering Biopolymer Materials Research Institute - AIT 0210 nano-technology |
| Zdroj: | Polymers Volume 13 Issue 21 Polymers, Vol 13, Iss 3692, p 3692 (2021) |
| Popis: | Meeting the challenge of circularity for plastics requires amenability to repurposing post-use, as equivalent or upcycled products. In a compelling advancement, complete circularity for a biodegradable polyvinyl alcohol/thermoplastic starch (PVA/TPS) food packaging film was demonstrated by bioconversion to high-market-value biopigments and polyhydroxybutyrate (PHB) polyesters. The PVA/TPS film mechanical properties (tensile strength (σu), 22.2 ± 4.3 MPa strain at break (εu), 325 ± 73% and Young’s modulus (E), 53–250 MPa) compared closely with low-density polyethylene (LDPE) grades used for food packaging. Strong solubility of the PVA/TPS film in water was a pertinent feature, facilitating suitability as a carbon source for bioprocessing and microbial degradation. Biodegradability of the film with greater than 50% weight loss occurred within 30 days of incubation at 37 °C in a model compost. Up to 22% of the PVA/TPS film substrate conversion to biomass was achieved using three bacterial strains, Ralstonia eutropha H16 (Cupriavidus necator ATCC 17699), Streptomyces sp. JS520, and Bacillus subtilis ATCC6633. For the first time, production of the valuable biopigment (undecylprodigiosin) by Streptomyces sp. JS520 of 5.3 mg/mL and the production of PHB biopolymer at 7.8% of cell dry weight by Ralstonia eutropha H16 from this substrate were reported. This low-energy, low-carbon post-use PVA/TPS film upcycling model approach to plastic circularity demonstrates marked progress in the quest for sustainable and circular plastic solutions. |
| Databáze: | OpenAIRE |
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