Hyperbaric storage (HS) consists in storing foods packaged in flexible plastic pouches under moderate hydrostatic pressure (P < 250 MPa) inside steel vessels for prolonged periods (i.e., up to months). When applied at room temperature, HS guarantees food safety for up to several months with near-zero energetic expenditure. However, the technological readiness level (TRL) of HS is still very low, primarily due to a scarce understanding of the technical framework of the technology. Within the latter, the capability of flexible packaging materials to withstand HS conditions without losing performance is a mandatory, yet untested, requirement. Therefore, the aim of this work was to explore the effects of HS on PA/PE, PP/EVOH/PE, PET and PLA films, selected as packaging materials typically employed in the food industry. To this aim, each film was formed into 10 x 10 cm pouches, filled with simulant (50 % (v/v) hydroalcoholic solution), and subjected to HS (200 MPa, 20 ± 1 °C) for up to 35 days. Control samples were stored at room conditions (0.1 MPa, 20 ± 1 °C). Samples were evaluated for optical (colour, UV-Vis spectroscopy), mechanical (tensile properties) and barrier (overall migration, water vapor transmission rate -WVTR) properties during storage. Storage under pressure caused some modification in the film properties: in PLA film, a significant decrease in WVTR was detected in concomitance with an increase in elongation at break (E%); PET film showed an opposite trend. Results suggest that the effect of HS on film properties is material-specific and time-dependent. The occurrence of changes in packaging film properties upon pressurization should be carefully considered to assess their suitability for HS. To this regard, deeper structural investigation might be performed to obtain sound information driving the choice for optimal HS packaging solutions.
Exploring the effects of hyperbaric storage on the structural, optical, mechanical and barrier properties of food packaging materials / Basso, F.; Feroce, A.; Manzocco, L.; Licciardello, F.. - (2022). (Intervento presentato al convegno SLIM2022 - X Shelf Life International Meeting tenutosi a Bogota (Colombia) nel Nov. 28- Dec 1, 2022.).
Exploring the effects of hyperbaric storage on the structural, optical, mechanical and barrier properties of food packaging materials
Feroce A.
;Licciardello F.
2022
Abstract
Hyperbaric storage (HS) consists in storing foods packaged in flexible plastic pouches under moderate hydrostatic pressure (P < 250 MPa) inside steel vessels for prolonged periods (i.e., up to months). When applied at room temperature, HS guarantees food safety for up to several months with near-zero energetic expenditure. However, the technological readiness level (TRL) of HS is still very low, primarily due to a scarce understanding of the technical framework of the technology. Within the latter, the capability of flexible packaging materials to withstand HS conditions without losing performance is a mandatory, yet untested, requirement. Therefore, the aim of this work was to explore the effects of HS on PA/PE, PP/EVOH/PE, PET and PLA films, selected as packaging materials typically employed in the food industry. To this aim, each film was formed into 10 x 10 cm pouches, filled with simulant (50 % (v/v) hydroalcoholic solution), and subjected to HS (200 MPa, 20 ± 1 °C) for up to 35 days. Control samples were stored at room conditions (0.1 MPa, 20 ± 1 °C). Samples were evaluated for optical (colour, UV-Vis spectroscopy), mechanical (tensile properties) and barrier (overall migration, water vapor transmission rate -WVTR) properties during storage. Storage under pressure caused some modification in the film properties: in PLA film, a significant decrease in WVTR was detected in concomitance with an increase in elongation at break (E%); PET film showed an opposite trend. Results suggest that the effect of HS on film properties is material-specific and time-dependent. The occurrence of changes in packaging film properties upon pressurization should be carefully considered to assess their suitability for HS. To this regard, deeper structural investigation might be performed to obtain sound information driving the choice for optimal HS packaging solutions.Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris