用于以ZnO改性低密度聚乙烯为基础的梅番茄的抗菌包装
Ludmila Motelica1,2, Denisa Ficai1,2, Ovidiu-Cristian Oprea1,2
1Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania.
International journal of molecular sciences
|June 19, 2024
概括
使用氧化 (ZnO) 纳米颗粒的新型复合膜提高了食品包装的安全性. 这些抗菌聚乙烯薄膜提供紫外线保护,并延长番茄等产品的保质期.
科学领域:
- 材料科学 材料科学 材料科学
- 食品科学 食品科学 食品科学
- 纳米技术 纳米技术
背景情况:
- 聚乙烯是广泛使用的食品包装材料,原因是工业对新技术的惯性.
- 修改现有的聚乙烯薄膜比采用全新的包装解决方案更可行.
- 将抗菌剂纳入聚乙烯可以赋予抗菌性质.
研究的目的:
- 为食品包装开发具有增强抗菌和紫外线阻断性能的新型复合膜.
- 研究将氧化 (ZnO) 纳米颗粒纳入低密度聚乙烯的效果.
- 评估开发的复合膜的抗菌疗效,物理性能和食品保存能力.
主要方法:
- 复合膜是通过化混合低密度聚乙烯与不同度的ZnO纳米颗粒 (高达5%) 在150°C10分钟的时间来制备的.
- 使用富里埃变换红外显微镜和扫描电子显微镜证实了ZnO纳米颗粒的均分散.
- 评估了抗微生物活性,UV-Vis透射率,机械性能,热稳定性和食品保存功效.
主要成果:
- 成功生产了高达5%的高同质复合膜.
- 这些片在可见光谱中表现出良好的透明度和出色的紫外线屏障特性 (透射率<5%).
- 从1%的 ZnO 开始观察到抗微生物和抗菌膜对格拉姆阳性和格拉姆阴性细菌的活性.
- 使用3%的ZnO可以达到最佳的机械屏障性能,热稳定性增加了100°C以上.
- 复合膜成功地保存了梅子番茄长达14天.
结论:
- 用ZnO纳米粒子增强的聚乙烯复合膜为提高食品包装安全性和质量提供了一个有前途的解决方案.
- 这些薄膜提供有效的抗微生物保护,紫外线屏蔽,以及改进的热和机械性能.
- 开发的包装材料显示了延长易腐食品的保质期的巨大潜力.
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