The development includes selenium nanoparticles in its composition, which help extend the life of the product. This packaging, which can be used for conventional packaging lines, was developed by a group of researchers from the University of Zaragoza and the Complutense University of Madrid, together with the companies Magapor and Samtack.
This food packaging is characterized by antioxidant properties using selenium nanoparticles in its composition, which help to extend the shelf life of products and food, which has already been successfully tested with products that oxidize easily, such as hazelnuts, nuts and fried potatoes in olive oil. Some products where this packaging has been able to extend their life.
The system is based on nanoparticles that absorb free radicals, which are able to pass through the polyethylene polymer layer located on the inside of the food container.
This absorption comes from oxygen-derived free radicals, which are spontaneously generated from oxygen, moisture and UV radiation and which initiate all oxidation reactions. In this way, as they form, they are attracted to the selenium nanoparticles that are behind the polymer layer.
Nanoparticles are embedded in an adhesive material used in a multi-layer system that forms flexible packaging, as European legislation prohibits direct contact of particles with packaged food.
The presence of these nanoparticles does not migrate the content, because in all the cases in which it was tested it behaves as a good antioxidant. In fact, although the applicability of these nanoparticles has been little investigated, they may pose a lower risk to the consumer than silver nanoparticles used in some countries to prepare active packaging in the food industry.
The container, which will soon be on the market, can be used on conventional packaging lines, with the added benefit of being stable for more than a month in storage.
This development was carried out within the research projects Nanoflexipack (subsidized by the Ministry of Economy and Competitiveness) and Avansecal (financed by the Community of Madrid and the European FEDER program).
Source: El Economista España