FOOD SCIENCE ›› 2017, Vol. 38 ›› Issue (15): 237-243.doi: 10.7506/spkx1002-6630-201715038

• Packaging & Storage • Previous Articles     Next Articles

Effect of Antimicrobial Ethylene-Vinyl Alcohol (EVOH) Copolymer Film Based on Sorbic Acid-Loaded Chitosan Microcapsules on the Preservation of Snakehead

HU Shuaifeng, YU Jie, ZHAO Bijie, WANG Zhe, LI Li   

  1. (1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; 2. Zhuhai College of Jilin University, Zhuhai 519041, China; 3. Center for Biomedical Materials and Interfaces, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China)
  • Online:2017-08-15 Published:2017-09-06

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Abstract: Using three different antimicrobials: sorbic acid, chitosan (CS) and sorbic acid-chitosan microcapsules (S-MP), each added at a level of 3%, antimicrobial ethylene-vinyl alcohol (EVOH) copolymer films, sorbic acid-EVOH (S-EVOH), chitosan-EVOH (CS-EVOH) and sorbic acid-chitosan microcapsules-EVOH (S-MP-EVOH), were prepared by sequential blending, granulation, extrusion and blow molding. Using polyethylene terephthalate (PET) pre-coated film as outer film, EVOH/PET, S-EVOH/PET, CS-EVOH/PET and S-MP-EVOH/PET composite films were prepared and applied to the preservation of snakehead fillets at (4 ± 1) ℃. The total viable count (TVC), total volatile basic nitrogen (TVB-N), pH, thiobarbituric acid (TBA), drip loss, K value and sensory evaluation were analyzed periodically during cold storage. The results indicated that CS-EVOH/PET film could extend the shelf-life of snakehead fillet by 2 days, and S-EVOH/PET and S-MP-EVOH/PET films could extend the shelf-life by 4 days compared to EVOH/PET film.

Key words: sorbic acid, chitosan, sorbic acid-chitosan microcapsules (S-MP), ethylene-vinyl alcohol (EVOH), snakehead, shelf-life

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