开发低密度聚乙烯薄膜,涂上基物质,用于长时间的生物活性
Iro Giotopoulou1, Renia Fotiadou2, Haralambos Stamatis2
1Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
Polymers
|January 17, 2024
概括
这项研究开发了使用天然的低密度聚乙烯 (LDPE) 食品包装的生物活性涂层. 这些涂层有效地抑制了细菌的生长,并提供了抗氧化剂的好处,延长了食品的保存时间.
科学领域:
- 食品科学与技术 食品科学与技术
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 传统的食品包装材料,如低密度聚乙烯 (LDPE),往往缺乏固有的抗菌或抗氧化特性.
- 对于积极的食品包装解决方案的需求越来越大,以提高食品安全性和延长保质期.
- 天然化合物为改善包装功能提供了合成添加剂的可持续替代品.
研究的目的:
- 为食品包装制造生物活性低密度聚乙烯 (LDPE) 薄膜开发一种高效的涂层方法.
- 评估涂有天然化合物的LDPE薄膜的抗菌和抗氧化特性.
- 在储存条件下评估开发的涂层的耐用性和长期生物活性.
主要方法:
- 将三个天然的基物质 (卡瓦克罗尔,蒂摩尔和橄叶提取物) 纳入基于甲基纤维素的溶液中.
- 优化表面活性剂/乳化剂度,以控制生物活性物质的捕获,并尽量减少加工过程中的损失.
- 用准备好的溶液涂覆LDPE薄膜.
- 对抗大肠杆菌*的抗微生物活性评估.
- 评估涂层薄膜的抗氧化活性和机械性能.
- 在密封袋中储存40天以上的长期生物活性测试.
主要成果:
- 开发的涂层大大抑制了大肠杆菌的生长.
- 涂层LDPE薄膜表现出极好的抗氧化活性.
- 在涂层过程后,LDPE薄膜的机械性能保持不变.
- 涂有卡瓦克罗尔和蒂摩尔的薄膜在长达7天的时间内显示出相当大的生物活性.
- 橄叶提取物涂层的薄膜保持了高的抗微生物和抗氧化特性至少40天.
结论:
- 建立了一种高效的涂层方法来生产具有增强食品包装性能的生物活性LDPE薄膜.
- 自然的化合物,特别是橄叶提取物,可以为LDPE包装提供长时间的抗菌和抗氧化功能.
- 开发的生物活性涂层为改善食品安全和延长包装食品的保质期提供了一个有希望的方法.
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