PE-BW-SiO2复合包装膜对草鱼保鲜效果的研究

Preservation Effect of PE-BW-SiO2 Composite Packaging Film on Grass Carp

中文关键词: 草鱼  保鲜  蜂蜡  纳米SiO2  PE-BW-SiO2复合包装膜

英文关键词: grass carp  preservation  beeswax  nano-SiO2  PE-BW-SiO2 composite packaging film

中文摘要:

      目的 开发一种具有优良理化性能，并能有效应用于草鱼保鲜的新型活性包装膜。方法 采用聚乙烯为基膜材料，以蜂蜡和纳米SiO2为活性成分，采用熔融共混和造粒吹膜工艺制备PE-BW-SiO2复合包装膜。测定包装膜的力学性能、阻隔性能和疏水性能，并研究它在4 ℃贮藏条件下对草鱼的保鲜效果。结果 通过添加BW-SiO2活性成分，包装膜的力学性能、阻隔性能和疏水性能得到提高。其中，BW-SiO2添加量(质量分数)为2%的包装膜的力学性能、阻隔性能等综合性能达到最佳水平。将不同包装膜包装的草鱼置于4 ℃下贮藏11 d，结果表明，与纯PE包装膜相比，添加BW-SiO2功效因子的复合PE包装膜对草鱼的保鲜效果更好，能够减缓鱼肉的水分流失和脂质氧化反应，有效延缓鱼肉的腐败变质进程，从而延长鱼肉的贮藏期。结论 PE-BW-SiO2复合包装膜具有良好的理化性能和保鲜效果，它有效地阻隔了外界水分的渗透和氧气的进入，从而减缓了水分流失和脂质氧化反应，同时还能防止微生物的滋长。此包装膜有效延缓了草鱼的腐败变质进程，在4 ℃下贮藏时将草鱼的货架期延长至11 d。

英文摘要:

      The work aims to develop a new type of active packaging film with excellent physicochemical properties for the preservation of grass carp. The PE-BW-SiO2 composite packaging film was produced by melt blending and granulation blown film process with polyethylene as the base film material, and beeswax and nano-SiO2 as the active ingredients. Meanwhile, the mechanical, barrier and hydrophobic properties of the film were determined and its freshness preservation effect on grass carp under 4 ℃ storage conditions was investigated. The mechanical, barrier and hydrophobic properties of the packaging film were improved by the addition of BW-SiO2. Among them, the packaging film with 2% BW-SiO2 achieved the best mechanical, barrier, and other comprehensive properties. After the grass carp packed in different packaging films was stored at 4 ℃ for 11 days, it was shown that compared with the pure PE packaging film, the composite PE packaging film with BW-SiO2 active ingredient had a better preservation effect on the grass carp, and it could reduce the water loss and lipid oxidation reaction of the fish, effectively slowing down the corruption and deterioration and prolonging the storage period. PE-BW-SiO2 composite packaging film has excellent physicochemical properties and a high capacity to preserve freshness. It effectively blocks external water and oxygen penetration, which slows down water loss and lipid oxidation reactions, thereby preventing microorganisms from growing. This packaging film can extend the shelf life of grass carp up to 11 days at 4 ℃ by effectively slowing down the spoilage process.