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多层薄膜由聚乙烯基基甲基甲和纤维素纳米晶体组成,具有高屏障和可堆肥性质

Beatriz Melendez-Rodriguez¹, Cristina Prieto¹, Maria Pardo-Figuerez^1,2

¹Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benllonch 7, 46980 Valencia, Spain.

|August 10, 2024

概括

这项研究开发了一种可堆肥的多层食品包装薄膜,使用聚乙烯基甲基甲基甲酸盐 (PBAT),聚氨基酸盐 (PHA),纤维素纳米晶体 (CNC) 和聚3-基酸盐-co-3-基酸盐) (PHBV). 该膜具有优良的屏障性能,并在60天内分解.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
可持续包装包装的可持续性

背景情况:

对可持续食品包装解决方案的需求日益增长.
需要高屏障材料来保持食品质量和延长保质期.
传统塑料在环境影响和屏障性能方面的局限性.

研究的目的:

开发和表征一种新的多层,高屏障,可堆肥膜用于食品包装.
评估纤维素纳米晶体 (CNC) 和电聚3-基酸-co-3-基酸 (PHBV) 对薄膜性能的影响.
评估薄膜适用于与食品接触的应用及其分解率.

主要方法:

制造四层吹膜,使用聚乙烯基甲基甲酸盐 (PBAT) 与聚酸酸盐 (PHA) 的混合物,并加入一个CNC屏障层和PHBV热层.
表面特性 (粗,张力),迁移,机械性能,剥离强度,屏障特性 (水蒸气,氧气) 和分解率的表征.
评估整体迁移以确定与食品接触的适宜性.

主要成果:

形成的膜表现出光滑的表面,并通过了整体迁移测试,表明适合与食物接触.
加入一个CNC间层显著改善了屏障特性,降低了高达90%的氧气透率,但降低了破裂时的延伸.
多层系统表现出良好的水蒸气屏障特性,并在60天内完全解体,层层之间具有牢固的粘附性.

结论:

开发的多层薄膜是一种完全可堆肥的结构,具有出色的屏障性能,适用于高屏障食品包装.
PBAT,PHA,CNC和PHBV的组合为传统包装材料提供了一个有希望的可持续替代品.
可能需要进一步优化,以平衡屏障性能与特定应用的机械灵活性.

关键词:

具有屏障特性,具有屏障特性.生物聚合物是一种生物聚合物.可堆肥,可以进行堆肥.移民移民迁移迁移多层多层的多层.纳米纤维素的纳米纤维素.包装包装包装包装

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