摘要
目的研究含α-生育酚的聚乙烯/聚乙烯醇(PE/PVA)活性包装膜对鲜切苹果品质的影响。方法通过溶液-涂布法制备得到含不同浓度α-生育酚的PE/PVA薄膜,测定分析贮藏期间含不同浓度α-生育酚的PE/PVA薄膜对鲜切苹果的色泽、质量损失率、硬度、维生素C含量、可滴定酸含量以及多酚氧化酶(PPO)活性的变化。结果含α-生育酚的PE/PVA薄膜可以使鲜切苹果的褐变减缓,失重率增加,硬度、维生素C含量和可滴定酸含量下降,抑制了其PPO活性,随着包装膜中α-生育酚含量的增加,对鲜切苹果品质的保护效果越好。结论该活性包装膜可以减缓鲜切苹果的品质变化,证明向包装薄膜中添加抗菌剂、抗氧化剂等来达到延长食品货架期是有效的。
The aim of this work was to study the effects of PE/PVA active packaging film containing α-tocopherol on the quality of fresh-cut apple. PE/PVA active packaging films containing different α-tocopherol concentrations were obtained through the solution-coating method and then applied to package fresh-cut apple. The changes of quality indexes were measured periodically during storage, including color, weight loss, firmness, VC content, titratable acid（TA） content and polyphenol oxidase（PPO） activity. The results showed that the PE/PVA active packaging film containing α-tocopherol could slow down browning, weight loss increasing, firmness descending, VC content and titratable acid content reducing of fresh-cut apple and inhibit its PPO activity. The fresh-keeping effectiveness for fresh-cut apple became better with increasing α-tocopherol concentration in PE/PVA active packaging film. In conclusion, it was shown that the PE/PVA active packaging film containing α-tocopherol could slow down the quality change of the fresh-cut apple. It proved that adding antimicrobial or antioxidant agent into packaging film to improve the shelf-life of food was viable.
出处
《包装工程》
CAS
CSCD
北大核心
2015年第21期17-21,33,共6页
Packaging Engineering
基金
"十二五"国家科技支撑计划(2013BAD19B06)
上海研发公共服务平台建设专项(11DZ2292800)
上海市高校青年教师培养资助计划(B-5409-13-0014)
上海海洋大学青年科研基金(A-0209-13-0600429)
上海市大学生创新项目(201531015059)
