Antioxidant and Antimicrobial Properties of Chitosan-PE Bi-Layer Films by Incorporating Oregano Essential Oil

Abstract:

Chitosan-PE bi-layer films exhibit antimicrobial activity but poor antioxidant activity. Oregano essential oil (100μL/100mL) was incorporated into chitosan solution to improve films antioxidant and antimicrobial behaviors. The present work investigated the scavenging of O₂·, ·OH, DPPH radical and reducing power of film, antimicrobial activity was also evaluated. The results showed that the scavenging effect of film solution on O₂·, ·OH, and DPPH was 80.87%, 85.56%, and 87.24%, respectively. Reducing power of film increased with the improvement of oregano essential oil. The antibacterial activity against E. Coli and B. Subtilis increased from 80.77% to 96.15% and from 93.02% to 98.10%, respectively. The preservation experiments showed that chitosan-PE film incorporated with oregano essential oil could extend the shelf life of pork to 810 days at 4°C.

• Periodical: Applied Mechanics and Materials (Volume 469)
• Pages: 140-147
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.469.140
• Online since: November 2013
• Authors: Hui Juan Bao, Yan Jiang*, Jia Qi Liu, Hai Yue Zhang
• Keywords: Antimicrobial, Antioxidant, Bi-Layer Film, Chitosan, Oregano Essential Oil, PE

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