Effects of Green Tea Extract on Physicochemical and Antioxidant Properties of Polyamide Packaging Film

Subject Areas : Journal of Chemical Health Risks

Ali Asghar Barzegaran ¹ , Maryam Jokar ² , Majid Javanmard Dakheli ³

1 - 1Department of Food Technology, Damghan Branch, Islamic Azad University, Damghan, Iran
2 - 1Department of Food Technology, Damghan Branch, Islamic Azad University, Damghan, Iran
3 - Department of Food Science, Iranian Research Organization for Science & Technology, Tehran, Iran

Received: 2014-08-24 Accepted : 2018-10-29 Published : 2018-10-29

Keywords: Green tea, Natural antioxidant, Active packaging, Polyamide film,

Abstract :

Polyamide 6 has been widely used in food packaging applications and also green tea contains amounts of antioxidant compounds. The aim of this study was investigation of green tea effects on properties of polyamide packaging polymer. Polyamide 6 was dissolved in methanol which was saturated with calcium chloride. The active packaging film was produced by incorporation of methanol green tea extracts at levels of 2.5, 5, 10 and 20% in polyamide solution by solution casting method. Mechanical and barrier properties of polyamide films were investigated using ASTM standards and antioxidant activity of polyamide films was evaluated using DPPH method. Results indicated that green tea extract increased antioxidant properties and tensile and young modulus of polyamide films. Oxygen and water vapor permeability of films were decreased by incorporation of green tea extract into polyamide matrix. Green tea extract improved barrier and tensile properties of polyamide films, however elongation at break reduced as increasing of green tea extract in polyamide-based films significantly (P<0.05).

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