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基于多乳酸和奇托的高级抗氧化二层薄膜:核桃油氧化抑制中的结构,功能和应用方面

Peng Gao¹, Yaru Lv¹, Shudan Wang¹

¹State Key Laboratory of Efficient Production of Forest Resources, Beijing Key Laboratory of Food Processing and Safety in Forestry, Department of Food Science and Engineering, College of Biological Sciences and Biotechnology, Beijing Forestry University, No.35 Tsinghua East Road, Haidian District, Beijing, 100083, PR China.

International journal of biological macromolecules

|December 18, 2025

概括

这项研究通过添加甲基 (CS) 层来增强聚乳酸 (PLA) 包装,提高塑性和屏障性能. 含有抗氧化剂的PLA/CS薄膜为食用油提供了卓越的保护,延长了其保质期.

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
食品包装技术食品包装技术

背景情况:

聚乳酸 (PLA) 是一种可生物降解的聚合物,具有包装应用的潜力.
然而,PLA的可塑性和屏障性能较差,限制了它在苛刻的包装场景中的使用.
开发基于PLA的先进材料对于可持续的包装解决方案至关重要.

研究的目的:

为了提高聚乳酸 (PLA) 薄膜的机械和屏障性能.
开发具有抗氧化剂功能的PLA/酸盐 (CS) 双层薄膜,用于增强食品包装.
评估这些薄膜在保护食用油免受氧化时的性能.

主要方法:

制造具有不同质量比率 (100:0至0:100) 的PLA/花素 (CS) 双层薄膜.
将抗氧化剂 (茶叶多,竹叶抗氧化剂,植物酸) 纳入CS层.
评估机械性能 (抗拉强度,破裂时的延长),氧气透性和抗氧化活性.
在核桃油包装中对抗透性和脂质氧化减缓的评估.

主要成果:

酸盐的加入显著提高了PLA薄膜的可塑性,并降低了氧气的透性.
50:50 PLA:CS 比例的薄膜显示出最佳的抗拉强度 (37.47 MPa) 和氧气屏障 (3.67 cm3·m−2·d−1·0.1 MPa−1).
抗氧化剂修饰的薄膜表现出80%的自由基清除能力和出色的抗透性,TP增强薄膜在防油方面优于PP薄膜.

结论:

两层PLA/CS薄膜提供了一种可行的策略,可以克服PLA在包装方面的局限性.
具有抗氧化剂功能的PLA/CS薄膜为食用油等对氧气敏感产品提供高性能,可持续的包装.
这些先进的材料延长了包装商品的保质期,减少了食物浪费.

关键词:

抗氧化剂双层薄膜是一种抗氧化剂.基托桑是一种酸盐.聚乳酸是一种多乳酸.核桃油的使用方法

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