Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging
Само за регистроване кориснике
2018
Аутори
Milovanović, StojaHollermann, Gesa
Errenst, Cornelia
Pajnik, Jelena
Frerich, Sulamith
Kroll, Stephen
Rezwan, Kurosch
Ivanović, Jasna
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Biodegradable polymers with antibacterial properties are highly desirable materials for active food packaging applications. Thymol, a dietary monoterpene phenol with a strong antibacterial activity is abundant in plants belonging to the genus Thymus. This study presents two approaches for supercritical CO2 impregnation of poly (lactic acid)(PLA)/poly(epsilon-caprolactone)(PCL) blended films to induce antibacterial properties of the material: (i) a batch impregnation process for loading pure thymol, and (ii) an integrated supercritical extraction-impregnation process for isolation of thyme extract and its incorporation into the films, operated in both batch or semi-continuous modes with supercritical solution circulation. The PCL content in films, impregnation time and CO2 flow regime were varied to maximize loading of the films with thymol or thyme extract with preserving films' structure and thermal stability. Representative film samples impregnated with thymol and thyme extract were ...tested against Gram ( - ) (Escherichia col) and Gram( + ) (Bacillus subtilis) model strains, by measuring their metabolic activity and re-cultivation after exposure to the films. The film containing thymol (35.8 wt%) showed a strong antibacterial activity leading to a total reduction of bacterial cell viability. Proposed processes enable fast, controlled and organic solvent-free fabrication of the PLA/PCL films containing natural antibacterial substances at moderately low temperature, with a compact structure and a good thermal stability, for potential use as active food packaging materials.
Кључне речи:
Antibacterial food packaging / Poly(lactic acid) / Poly(epsilon-caprolactone) / Supercritical CO2 impregnation / Thyme extract / ThymolИзвор:
Food Research International, 2018, 107, 486-495Издавач:
- Elsevier Science Bv, Amsterdam
Финансирање / пројекти:
- Функционални физиолошки активни биљни материјали са додатом вредношћу за примену у фармацеутској и прехрамбеној индустрији (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45017)
- common initiative of the German Federal Government [FKZ 01PL11082B]
- German Academic Exchange ServiceDeutscher Akademischer Austausch Dienst (DAAD) [57140416]
- DAAD Funding programme Research Stays for University Academics and Scientists [57210259]
DOI: 10.1016/j.foodres.2018.02.065
ISSN: 0963-9969
PubMed: 29580511
WoS: 000430770700051
Scopus: 2-s2.0-85042767849
Колекције
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Milovanović, Stoja AU - Hollermann, Gesa AU - Errenst, Cornelia AU - Pajnik, Jelena AU - Frerich, Sulamith AU - Kroll, Stephen AU - Rezwan, Kurosch AU - Ivanović, Jasna PY - 2018 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4037 AB - Biodegradable polymers with antibacterial properties are highly desirable materials for active food packaging applications. Thymol, a dietary monoterpene phenol with a strong antibacterial activity is abundant in plants belonging to the genus Thymus. This study presents two approaches for supercritical CO2 impregnation of poly (lactic acid)(PLA)/poly(epsilon-caprolactone)(PCL) blended films to induce antibacterial properties of the material: (i) a batch impregnation process for loading pure thymol, and (ii) an integrated supercritical extraction-impregnation process for isolation of thyme extract and its incorporation into the films, operated in both batch or semi-continuous modes with supercritical solution circulation. The PCL content in films, impregnation time and CO2 flow regime were varied to maximize loading of the films with thymol or thyme extract with preserving films' structure and thermal stability. Representative film samples impregnated with thymol and thyme extract were tested against Gram ( - ) (Escherichia col) and Gram( + ) (Bacillus subtilis) model strains, by measuring their metabolic activity and re-cultivation after exposure to the films. The film containing thymol (35.8 wt%) showed a strong antibacterial activity leading to a total reduction of bacterial cell viability. Proposed processes enable fast, controlled and organic solvent-free fabrication of the PLA/PCL films containing natural antibacterial substances at moderately low temperature, with a compact structure and a good thermal stability, for potential use as active food packaging materials. PB - Elsevier Science Bv, Amsterdam T2 - Food Research International T1 - Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging EP - 495 SP - 486 VL - 107 DO - 10.1016/j.foodres.2018.02.065 ER -
@article{ author = "Milovanović, Stoja and Hollermann, Gesa and Errenst, Cornelia and Pajnik, Jelena and Frerich, Sulamith and Kroll, Stephen and Rezwan, Kurosch and Ivanović, Jasna", year = "2018", abstract = "Biodegradable polymers with antibacterial properties are highly desirable materials for active food packaging applications. Thymol, a dietary monoterpene phenol with a strong antibacterial activity is abundant in plants belonging to the genus Thymus. This study presents two approaches for supercritical CO2 impregnation of poly (lactic acid)(PLA)/poly(epsilon-caprolactone)(PCL) blended films to induce antibacterial properties of the material: (i) a batch impregnation process for loading pure thymol, and (ii) an integrated supercritical extraction-impregnation process for isolation of thyme extract and its incorporation into the films, operated in both batch or semi-continuous modes with supercritical solution circulation. The PCL content in films, impregnation time and CO2 flow regime were varied to maximize loading of the films with thymol or thyme extract with preserving films' structure and thermal stability. Representative film samples impregnated with thymol and thyme extract were tested against Gram ( - ) (Escherichia col) and Gram( + ) (Bacillus subtilis) model strains, by measuring their metabolic activity and re-cultivation after exposure to the films. The film containing thymol (35.8 wt%) showed a strong antibacterial activity leading to a total reduction of bacterial cell viability. Proposed processes enable fast, controlled and organic solvent-free fabrication of the PLA/PCL films containing natural antibacterial substances at moderately low temperature, with a compact structure and a good thermal stability, for potential use as active food packaging materials.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Food Research International", title = "Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging", pages = "495-486", volume = "107", doi = "10.1016/j.foodres.2018.02.065" }
Milovanović, S., Hollermann, G., Errenst, C., Pajnik, J., Frerich, S., Kroll, S., Rezwan, K.,& Ivanović, J.. (2018). Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging. in Food Research International Elsevier Science Bv, Amsterdam., 107, 486-495. https://doi.org/10.1016/j.foodres.2018.02.065
Milovanović S, Hollermann G, Errenst C, Pajnik J, Frerich S, Kroll S, Rezwan K, Ivanović J. Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging. in Food Research International. 2018;107:486-495. doi:10.1016/j.foodres.2018.02.065 .
Milovanović, Stoja, Hollermann, Gesa, Errenst, Cornelia, Pajnik, Jelena, Frerich, Sulamith, Kroll, Stephen, Rezwan, Kurosch, Ivanović, Jasna, "Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging" in Food Research International, 107 (2018):486-495, https://doi.org/10.1016/j.foodres.2018.02.065 . .