来自PBAT/PLA的活性包装膜含有Rosmarinus officinalis L. 提取物:抗氧化剂,紫外线屏蔽和可堆肥性质
Xiaoyan He1,2, Lisheng Tang1,2, Ran Huang1,2,3,4
1Provincial Intelligent Health Proof-of-Concept Center, Yiwu Research Institute of Fudan University, Yiwu 322000, China.
Molecules (Basel, Switzerland)
|January 28, 2026
概括
这项研究使用迷香提取物 (RM) 增强了可生物降解的聚乙烯基合甲基 (PBAT) /聚乳酸 (PLA) 薄膜. 功能化的薄膜显示出改进的抗氧化和紫外线阻断特性,适用于环保食品包装.
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
- 食品科学 食品科学 食品科学
背景情况:
- 对可持续食品包装的日益增长的需求推动了对可生物降解聚合物的兴趣,例如PBAT/PLA混合物.
- 现有的PBAT/PLA薄膜具有包括低抗氧化能力,紫外线稳定性和抗菌活性在内的局限性.
- 自然添加剂提供了一种途径,以提高可生物降解包装材料的功能.
研究的目的:
- 为了提高PBAT/PLA复合膜的抗氧化,紫外线屏蔽和抗菌性能.
- 为了评估加入Rosmarinus officinalis L.提取物 (RM) 对薄膜特性的影响.
- 评估RM功能化的PBAT/PLA薄膜对于可持续食品包装应用的适用性.
主要方法:
- PBAT/PLA/RM混合膜是使用融挤出和吹膜加工制造的,使用不同的RM度 (0.1%1%).
- 综合性表征包括热稳定性,机械性质,形态,抗氧化活性 (DPPH测定),紫外线阻断,抗微生物有效性和生物降解性测试.
- 在模拟的堆肥条件下分析了片的性能.
主要成果:
- RM显著提高了抗氧化能力,在0.3%的RM中进行了最佳的DPPH基因清除.
- 紫外线阻性能随着RM度的增加而增加;具有≥0.5%RM的薄膜阻了≥90%的UVA/UVB辐射.
- 所有的薄膜都显示出生物降解性 (在240天内降解90%以上),尽管RM稍微延长了初始阶段. 抗菌作用有限,高度的RM (>1%) 导致处理问题 (粘性).
结论:
- 罗斯马林斯 (Rosmarinus officinalis L.) 提取物是一种有效的天然添加剂,可增强PBAT/PLA膜的抗氧化和紫外线屏蔽性能.
- 具有RM功能的薄膜保持出色的生物降解性,为可持续的食品包装提供了可行的选择.
- 优化的RM整合平衡了功能增强与加工可行性,解决了PBAT/PLA复合材料的主要局限性.
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