Multilayer reactive barrier materials

Carranza, Susana; Paul, Donald R; Bonnecaze, Roger T.

doi:10.1016/j.memsci.2012.01.030

Cited by 12 publications

(13 citation statements)

References 17 publications

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“…The oxygen scavenging in polymeric films is a complex, heterogeneous process, involving the coexistence of physical and chemical phenomena such as the physical dissolution and diffusion of the gas through the polymer and reaction of the active phase with oxygen . Many efforts are present in the literature devoted to model these phenomena in order to predict the performance of scavenging films pointing out that there is a strong difference between the behavior of multilayers and single layer systems …”

Section: Resultsmentioning

confidence: 99%

Development and oxygen scavenging performance of three‐layer active PET films for food packaging

Maio

Scarfato

Galdi

et al. 2014

J of Applied Polymer Sci

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Polymeric active materials represent an innovative food packaging concept that has been introduced to improve the quality of foods and to enhance their shelf life. In this article, the effect of the inclusion of an oxygen scavenger in a polymeric matrix, realizing multilayer active polyester films by coextrusion process, is analyzed. In particular, three layer active films, at different mass ratios of the layers, were produced to form symmetrical "ABA" structures comprising polyethylene terephthalate (PET) with a polymeric oxygen scavenger (OS) as core layer and pure PET as external layers. Oxygen scavenging tests conducted on the multilayer active structures have pointed out the role of the relative layer thickness in controlling the scavenging capacity, the activity time and the oxygen absorption rate. A modeling of the scavenging phenomena, which combines a quasi steady‐state distribution in the skin layers with a flat profile of O2 content in the active core layer, can explain the experimentally observed oxygen absorption rate at short times. Moreover, steady state oxygen transport measurements, performed when the scavenger reactive capacity is exhausted, have shown that the presence of the active phase slightly reduces the O2 permeability, compared with the neat PET. The effect, which progressively increases with the amount of active phase in the film formulation, was related to the different morphological state developed on processing. Finally, preliminary shelf life tests on fresh‐cut untreated apples suggest that the developed three layer active films have a significant potential in the shelf‐life extension of oxygen sensitive food products. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41465.

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Section: Resultsmentioning

confidence: 99%

Development and oxygen scavenging performance of three‐layer active PET films for food packaging

Maio

Scarfato

Galdi

et al. 2014

J of Applied Polymer Sci

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“…In fact, η depends mostly on the scavenger dispersion within the matrix. By following the approach used by Carranza et al, the mass balance for the oxygen and the scavenging material is expressed by these reported equations:

\frac{\partial C_{o x y}}{\partial t} = D_{i} \frac{\partial^{2} C_{o x y}}{\partial x^{2}} - k_{b i}^{*} C_{o x y} ε

\frac{d ε}{d t} = - ν k_{b}^{*} C_{o x y} ε

where v is the stoichiometric coefficient for scavenging reaction and x is the position along the film thickness.…”

Section: Methodsmentioning

confidence: 99%

“…However, due to the fast reaction process over diffusion, the radius of the reactive core decreased with time and made the shell around it to be thicker. Many other studies, devoted to improve the barrier performance of the multilayer films, pointed out that the barrier properties of multilayer polymeric films could be improved by inclusion of scavenging materials . The configuration of single reactive layer within a multilayer film with different number of inert layers have been also studied, however, there are only limited studies on the analysis of the layers' thickness with respect to the concentration of the scavengers.…”

Section: Introductionmentioning

confidence: 99%

“…Many other studies, devoted to improve the barrier performance of the multilayer films, pointed out that the barrier properties of multilayer polymeric films could be improved by inclusion of scavenging materials . The configuration of single reactive layer within a multilayer film with different number of inert layers have been also studied, however, there are only limited studies on the analysis of the layers' thickness with respect to the concentration of the scavengers. The specific selection of the polymer that has to be incorporated into the multilayer film depends on the specific requirement of the food product to be packed and its required shelf life.…”

Section: Introductionmentioning

confidence: 99%

“…In a previous study, three‐layers ABA type multilayer polymeric films (A and B represent the inert‐ and the reactive‐layer, respectively) were experimentally produced by a co‐extrusion process in order to study the role of the different mass ratio and layer thickness on controlling the scavenging capacity, activity time, and oxygen absorption rate. Carranza et al described the effect of configuration and the number of layers on the scavenging performance of the films, and pointed out that an ABA type is the preferable configuration for food and pharmaceutical applications. Tung et al evaluated styrene‐butadiene‐styrene block copolymer with varying amounts of a cobalt catalyst as an oxygen scavenging component for barrier systems, and recommended a theoretical model to predict the critical thickness of multilayer films from basic principles rather than using the extensive experimental protocols.…”

Section: Introductionmentioning

confidence: 99%

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Oxygen transfer in co‐extruded multilayer active films for food packaging

et al. 2017

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Oxygen scavenger applications in flexible food packaging are still limited due to the difficulty to ensure scavenging activity during storage and throughout the product shelf life. To avoid fast inactivation of the scavenger, multilayer active structures can be realized by inserting the active layer between two or more inert layers. In this work, an unsteady-state 1D reaction-diffusion mass transfer model was developed for predicting and optimizing the barrier-to-oxygen performance and the physical configurations of the co-extruded multilayer active films. The film configuration was a three-layers structure composed of polyethylene terephthalate (PET) as external inert layers, and PET with a polymeric oxygen scavenger as the core reactive layer. Scavenging activity of the multilayer film increased with the reactive layer thickness. Oxygen absorption reaction at short times decreased proportionally with the thickness of the external layers. The most appropriate combinations of inert-to-active film thickness were studied and analyzed

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Oxygen Scavengers in Food Packaging

Apicella

Incarnato

2019

Reference Module in Food Science

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Multilayer reactive barrier materials

Cited by 12 publications

References 17 publications

Development and oxygen scavenging performance of three‐layer active PET films for food packaging

Development and oxygen scavenging performance of three‐layer active PET films for food packaging

Oxygen transfer in co‐extruded multilayer active films for food packaging

Oxygen Scavengers in Food Packaging

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