可生物降解的Levan/Chitosan复合膜:在牛肉包装中开发和应用
Anissa Haddar1,2, Emna Sellami1, Oumayma Bouazizi1
1Laboratory of Plants Improvement and Valorization of Agroressources, National School of Engineering of Sfax, University of Sfax, Sfax 3000, Tunisia.
Foods (Basel, Switzerland)
|June 26, 2025
概括
为牛肉包装开发了可生物降解的levon-chitosan薄膜. 该L25:C75配方显示出出色的机械,抗氧化和抗菌特性,延长牛肉片的保质期并减少细菌生长.
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
- 生物技术是生物技术.
背景情况:
- 传统的食品包装材料,如低密度聚乙烯 (LDPE),有助于环境污染.
- 食品包装中越来越需要可持续和可生物降解的替代品.
研究的目的:
- 为牛肉包装开发和描述可生物降解的Levon-Chitosan复合膜.
- 优化薄膜配方,以提高功能性质和食品保存效率.
- 评估开发的薄膜的生物降解性和抗菌活性.
主要方法:
- 复合膜是使用溶液造来制备的,使用不同的levon-chitosan比率和糖醇作为可塑剂.
- 功能性质通过机械测试 (抗拉强度,破裂时延长),水溶性,FTIR分析,抗氧化活性测试 (ABTS•+抑制) 和对大肠杆菌和金黄色杆菌的抗菌测试来评估.
- 性能最好的薄膜 (L25:C75) 的有效性在冷藏下对牛肉包装进行了评估,将细菌数量与LDPE包装进行了比较.
- 通过监测土壤降解速度来评估生物降解性.
主要成果:
- 配方L25:C75表现出最佳的机械性能 (拉力强度:15.43 MPa,破裂时延长:35.37%) 和高水溶性 (46.64%).
- FTIR证实了莱文和基托之间的成功集成和分子间相互作用.
- 这些膜表现出显著的抗氧化活性 (91%的ABTS•+抑制) 和广泛的抗菌作用.
- 在4°C下7天后,在牛肉片上的应用,与LDPE包装相比,减少了1.8log CFU/g的总活性细菌数量.
- 含量较高的Levon薄膜 (L75:C25) 显示出良好的生物降解性,14天后在土壤中降解68%.
结论:
- 莱万-奇托桑复合薄膜,特别是L25:C75配方,显示出作为有效和可生物降解的包装材料,以延长牛肉片的保质期的显著前景.
- 这些薄膜为传统塑料提供了可持续的替代品,既解决了食品保存需求,也解决了环境问题.
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