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首页> 外文期刊>Journal of Applied Polymer Science >Biodegradable high oxygen barrier membrane for chilled meat packaging
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Biodegradable high oxygen barrier membrane for chilled meat packaging

机译：用于冷藏肉类包装的可生物降解的高氧阻隔膜

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"Chilled" meat is more nutritional, healthy and hygienic than the meat kept at ambient temperature. "Poly(propylene carbonate) (PPC) and poly(vinly alcohol) (PVA) were used to prepare biodegradable three-layer PPC/PVA/PPC films with high barrier and tensile properties. The potential benefits of the developed films were also evaluated on the shelf life of chilled meat products. Compared to PPC film, using 20 wt % PVA as an intermediate layer in PPC/PVA/PPC film remarkably enhanced oxygen barrier performance at 0 and 50 RH % by about 500 times, tensile strength by about 8 times, and Young's modulus by nine times, but no beneficial effect on water vapor barrier performance has been observed. A new "sandwich" type of completely biodegradable material with high barrier was obtained. The application of PPC/PVA20/PPC film as the packaging material of chilled meat was effectively kept the total viable count (TVC) and total volatile basic nitrogen (TVB-N) to acceptable levels in chilled meats until 19th day of storage at 4 degrees C, however, the spoilage occurred within 11th and 14th days of refrigerated storage in term of TVC and TVB-N, respectively, in the chilled meats packed with only PPC. Herein, we report that PPC/PVA/PPC three-layer film can be a promising well-defined biodegradable material with excellent potential in chilled meat packaging. (C) 2015 Wiley Periodicals, Inc.
机译：“冷藏”肉比保持在室温下的肉更营养，健康和卫生。 “聚碳酸亚丙酯（PPC）和聚乙烯醇（PVA）被用于制备具有高阻隔性和拉伸性能的可生物降解的三层PPC / PVA / PPC膜。与PPC膜相比，在PPC / PVA / PPC膜中使用20 wt％PVA作为中间层，与PPC膜相比，在0和50 RH％时的阻氧性能显着提高了约500倍，拉伸强度提高了约8倍，其杨氏模量提高了9倍，但对水蒸气阻隔性能未见有益效果，获得了一种新型的“三明治”型高阻隔性完全可生物降解材料，将PPC / PVA20 / PPC薄膜用作包装材料冷藏肉的材料有效地保持了冷藏肉的总生存量（TVC）和总挥发性碱性氮（TVB-N）到可接受的水平，直到在4摄氏度下储存第19天为止，但是，变质发生在第11天和第14天的分别以TVC和TVB-N形式冷藏在仅装有PPC的冷藏肉中。在本文中，我们报道PPC / PVA / PPC三层膜可以成为一种有前途的，具有良好定义的可生物降解材料，在冷藏肉类包装中具有出色的潜力。 （C）2015年Wiley Periodicals，Inc.

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