APPLICATION OF PHYSICOCHEMICALLY MODIFIED POLYMERIC FOIL TO DEVELOP ANTIOXIDANT PACKAGING

The method of propyl gallate immobilization on the surface of polymeric film has been developed. Surface of polyethylene foil was modified by electric corona and coated with a chitosan layer prepared from 1% solution of polysaccharide dissolved in 1% lactic acid. Then, it was gelated in a mixture of ethanol and NaOH solution. A portion of gallate ranging from 2.87 to 5.67 μg/cm² was immobilized in the coating prepared with the sorption method. The film obtained was characterised by antioxidant activity measured by scavenging DPPH^• radicals and its mean value was equal to 9 x 10^-3 TE/cm². Preliminary measurements showed that the obtained polyethylene film coated with the chitosan layer containing immobilized propyl gallate lost half of its activity after about 5 months of storage at room temperature.

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.