Possibility to maintain modified atmosphere in pouches made from biopolymer materials
2016
Bulut, Sandra (Faculty of Technology, Novi Sad (Serbia)) | Lazić, Vera (Faculty of Technology, Novi Sad (Serbia)) | Popović, Senka (Faculty of Technology, Novi Sad (Serbia)) | Šuput, Danijela (Faculty of Technology, Novi Sad (Serbia)) | Hromiš, Nevena (Faculty of Technology, Novi Sad (Serbia)) | Popović, Ljiljana (Faculty of Technology, Novi Sad (Serbia))
Because of their excellent properties, synthetic plastic materials have a major use in all branches of industry, especially in packing. However, their intensive use has led to a major ecological problem of disposing and recycling synthetic material waste. Therefore, science is more focused on biodegradable biopolymer materials that can be obtained from natural resources and decomposed naturally in the environment. In recent years, there has been a great interest in biopolymers obtained from agro-industrial waste. One of the widely used techniques for improving quality and safety of food products is modified atmosphere packaging (MAP). MAP can preserve the quality and extend the shelf life of foods by slowing down chemical and biochemical reactions and growth of microorganisms that affect food spoilage. The aim of this paper was to compare barrier and mechanical properties of biodegradable biopolymer pouches, obtained from agro-industrial waste (pumpkin oil cake-zein) and high-barrier commercial packaging material (polyamide-polyethylene). Possibility to maintain modified atmosphere in the pouches, as well as influence of food product on modified atmosphere, were also investigated. A semi-hard Mozzarella cheese was chosen as a food product. Obtained results showed that both materials have great O2 barrier properties. Pumpkin oil cake-zein laminated pouches have higher CO2 permeability, and this can be considered as an advantage for packaging food products with high respiration rates, such as cheese. In commercial high-barrier material, used in this study, increase of the CO2 content was observed. Commercial packaging material showed better results it maintaining modified atmosphere, because of better barrier properties.
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