Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated Foods
The aim of this work concerned the production of an active food packaging suitable for refrigerated foods. Polylactic-acid-based films were produced by optimizing the solvent casting technique and testing different loadings of extracts obtained from spent coffee grounds. Indeed, an extract obtained...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Foods |
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| Online Access: | https://www.mdpi.com/2304-8158/12/22/4167 |
| _version_ | 1797459334189285376 |
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| author | Margherita Pettinato Maria Bolla Roberta Campardelli Giuseppe Firpo Patrizia Perego |
| author_facet | Margherita Pettinato Maria Bolla Roberta Campardelli Giuseppe Firpo Patrizia Perego |
| author_sort | Margherita Pettinato |
| collection | DOAJ |
| description | The aim of this work concerned the production of an active food packaging suitable for refrigerated foods. Polylactic-acid-based films were produced by optimizing the solvent casting technique and testing different loadings of extracts obtained from spent coffee grounds. Indeed, an extract obtained by high-pressure and -temperature extraction (HPTE) and a further purified extract by liquid–liquid extraction (LLE) were separately used as active agents, and the effects on packaging features and active compounds migration were analyzed. The selected active agents showed antioxidant and lipid peroxidation inhibition effects on food simulants (peroxide values of 9.2 ÷ 12.0 meqO<sub>2</sub>/kg extra virgin olive oil), demonstrating the possibility of enhancing food shelf life. In addition, significant effects on the packaging structure due to the presence of the extract were observed, since it can enhance gas barrier properties of the polymer (O<sub>2</sub> permeability of 1.6 ÷ 1.3 × 10<sup>−9</sup> cm<sup>2</sup>/s) and confer better processability. In general, the HPTE extract exhibited better performances than the further purified extract, which was due to the presence of a complex pool of antioxidants and the browning effect on the film but a limited loading capacity on the polymer (840 μg <sub>caffeine</sub>/g <sub>PLA</sub>), while higher loading capabilities were enabled using LLE extract. |
| first_indexed | 2024-03-09T16:49:57Z |
| format | Article |
| id | doaj.art-7f290071c0da42548cf6088fbe600f1e |
| institution | Directory Open Access Journal |
| issn | 2304-8158 |
| language | English |
| last_indexed | 2024-03-09T16:49:57Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Foods |
| spelling | doaj.art-7f290071c0da42548cf6088fbe600f1e2023-11-24T14:42:17ZengMDPI AGFoods2304-81582023-11-011222416710.3390/foods12224167Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated FoodsMargherita Pettinato0Maria Bolla1Roberta Campardelli2Giuseppe Firpo3Patrizia Perego4Department of Civil, Chemical and Environmental Engineering, Polytechnic School, University of Genoa, Via All’Opera Pia 15, 16145 Genoa, ItalyDepartment of Civil, Chemical and Environmental Engineering, Polytechnic School, University of Genoa, Via All’Opera Pia 15, 16145 Genoa, ItalyDepartment of Civil, Chemical and Environmental Engineering, Polytechnic School, University of Genoa, Via All’Opera Pia 15, 16145 Genoa, ItalyDepartment of Physics, Nanomedicine Laboratory, University of Genoa, Via Dodecaneso 33, 16146 Genoa, ItalyDepartment of Civil, Chemical and Environmental Engineering, Polytechnic School, University of Genoa, Via All’Opera Pia 15, 16145 Genoa, ItalyThe aim of this work concerned the production of an active food packaging suitable for refrigerated foods. Polylactic-acid-based films were produced by optimizing the solvent casting technique and testing different loadings of extracts obtained from spent coffee grounds. Indeed, an extract obtained by high-pressure and -temperature extraction (HPTE) and a further purified extract by liquid–liquid extraction (LLE) were separately used as active agents, and the effects on packaging features and active compounds migration were analyzed. The selected active agents showed antioxidant and lipid peroxidation inhibition effects on food simulants (peroxide values of 9.2 ÷ 12.0 meqO<sub>2</sub>/kg extra virgin olive oil), demonstrating the possibility of enhancing food shelf life. In addition, significant effects on the packaging structure due to the presence of the extract were observed, since it can enhance gas barrier properties of the polymer (O<sub>2</sub> permeability of 1.6 ÷ 1.3 × 10<sup>−9</sup> cm<sup>2</sup>/s) and confer better processability. In general, the HPTE extract exhibited better performances than the further purified extract, which was due to the presence of a complex pool of antioxidants and the browning effect on the film but a limited loading capacity on the polymer (840 μg <sub>caffeine</sub>/g <sub>PLA</sub>), while higher loading capabilities were enabled using LLE extract.https://www.mdpi.com/2304-8158/12/22/4167active food packagingspent coffee groundswaste valorizationhigh-pressure and -temperature extractionpolylactic acidgas barrier properties |
| spellingShingle | Margherita Pettinato Maria Bolla Roberta Campardelli Giuseppe Firpo Patrizia Perego Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated Foods Foods active food packaging spent coffee grounds waste valorization high-pressure and -temperature extraction polylactic acid gas barrier properties |
| title | Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated Foods |
| title_full | Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated Foods |
| title_fullStr | Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated Foods |
| title_full_unstemmed | Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated Foods |
| title_short | Potential Use of PLA-Based Films Loaded with Antioxidant Agents from Spent Coffee Grounds for Preservation of Refrigerated Foods |
| title_sort | potential use of pla based films loaded with antioxidant agents from spent coffee grounds for preservation of refrigerated foods |
| topic | active food packaging spent coffee grounds waste valorization high-pressure and -temperature extraction polylactic acid gas barrier properties |
| url | https://www.mdpi.com/2304-8158/12/22/4167 |
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