New antibacterial film keeps food 2-8 times longer

A team of chemists from RUDN University has created an antibacterial coating for food products. Mixture

consists of two components, safe forhuman health and forming a thin, non-toxic and biodegradable film. It has no color or taste and can increase the shelf life of products by 2.5-8 times. The research is published in Food Packaging and Shelf Life.

Food packaging is usually made fromchemical compounds based on synthetic polymers such as polyethylene and polypropylene. These materials are harmful to the environment and take tens, if not thousands of years to decompose. A team of chemists from the University of PFUR has created such a coating from polysaccharides - natural macromolecules that are the building blocks of living organisms. Polysaccharides have no negative health effects, are biodegradable and non-toxic.

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“We managed to obtain non-toxic derivativeschitosan, which have extraordinary antibacterial properties, almost similar to those of commercial antibiotics, and have been proposed to use them to increase film durability and antibacterial properties. Our coating is based on SC-Na salt, which has a high film-forming ability. In addition, it is non-toxic and works as an antioxidant, increasing the shelf life of food products, ”noted Andrey Kritchenkov, Ph.D. in Chemistry, Research Fellow at the Department of Inorganic Chemistry, RUDN University.

To test their invention, the team putseveral bananas in a film for 10 days. During the experiment, scientists measured their mass, vitamin C content and the level of carbon dioxide emissions. After 10 days, these parameters were compared with the results of the uncoated control group. The coated fruit lost 3 times less weight and 8 times less vitamin C.

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