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. 2022 Feb 28;14(5):990.
doi: 10.3390/polym14050990.

Effect of Ultrasound Treatment on Barrier Changes of Polymers before and after Exposure to Food Simulants

Mario Ščetar  1 , Davor Daniloski  2   3 , Mirela Tinjić  1 , Mia Kurek  1 , Kata Galić  1
Affiliations

Effect of Ultrasound Treatment on Barrier Changes of Polymers before and after Exposure to Food Simulants

Mario Ščetar et al. Polymers (Basel). .

Abstract

In this study, we investigated the impact of ultrasound treatment on barrier properties of linear low-density polyethylene (LLDPE) and acrylic/poly(vinylidene chloride) polypropylene (PPAcPVDC)-coated pouches intended for food packaging before and after exposure to food simulants. Packaging pouches were filled with two food simulants, namely ethanol (10% (v/v)) and acetic acid (3% (w/v)), in order to simulate food−packaging interaction and possible compound migration from packaging materials. Samples were subjected to an ultrasound water bath treatment for 5 min, 15 min, and 30 min at 60 °C (±2 °C) and with an amplitude of 100% as an equivalent to the heat-treatment conditions combined with an ultrasound effect. Furthermore, the effect of temperature on the polymer barrier (water vapour and oxygen permeability) properties was tested at 20 °C, 40 °C, and 60 °C. Results showed that PPAcPVDC possessed better properties of water vapour permeability and oxygen permeability properties to LLDPE. Statistical analyses showed a significant (p < 0.001) impact of ultrasound treatment on the overall migration value, regardless of the food simulant used.

Keywords: barrier properties; coated polypropylene; food–packaging interaction; linear low-density polyethylene; overall migration; ultrasound.

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Conflict of interest statement

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Arrhenius plots of gas solubility (ln S) as a function of temperature (T-1); (A) PPAcPVDC and (B) LLDPE samples.
Figure 2
Figure 2
Arrhenius plots of gas diffusion (ln D) as a function of temperature (T−1); (A) PPAcPVDC and (B) LLDPE samples.
Figure 3
Figure 3
Arrhenius plots of gas permeability (ln P) as a function of temperature (T−1); (A) PPAcPVDC and (B) LLDPE samples.
See this image and copyright information in PMC

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