一项关于在与食品接触期间聚乙烯基基甲基甲酸 (PBAT) 薄膜的性能,结构,组成和释放行为变化的研究
Linwang Fan1, Jiaxin Ma2, Wenyan Liu3
1School of Materials Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, Hainan Province, China.
Journal of hazardous materials
|May 15, 2024
概括
这项研究研究了用于食品包装的聚丁烯基酸二甲基甲酸 (PBAT) 可生物降解薄膜. 在与食物接触的条件下,PBAT膜显示降解增加,并释放了像2,4-DTBP和TPA这样的小分子.
科学领域:
- 材料科学 材料科学 材料科学
- 食品安全 食品安全
- 聚合物化学 聚合物化学
背景情况:
- 聚乙烯基基甲基乙烯酸 (PBAT) 是一种可生物降解的聚合物,越来越多地用于食品包装应用.
- 人们担心,PBAT中的小分子可能会迁移到食品中,从而影响食品安全.
- 对于其安全应用而言,全面了解与食品接触期间的PBAT行为至关重要.
研究的目的:
- 为了研究PBAT膜在与食物接触时的物理和化学变化.
- 识别和量化PBAT薄膜释放到食品模拟剂中的小分子.
- 评估环境因素对PBAT退化和迁移的影响.
主要方法:
- 采用了多层次的方法,检查了从宏观到分子水平的变化.
- 在宏观尺度上分析了表面粗度.
- 结晶度和降解指数是在微尺度上测量.
- 气色谱-质谱学 (GC-MS/MS) 和液色谱-质谱学 (LC-MS/MS) 用于分子分析和迁移研究.
主要成果:
- 随着食品仿真剂度降低和温度升高,PBAT薄膜表面粗度增加,特别是在酸性条件下.
- 微尺度分析显示结晶性和降解指数增加,导致热稳定性降低.
- 2,4-di-tert-butylphenol (2,4-DTBP) 显示出最高的迁移含量,其释放行为以迁移动力学为特征.
- 在酸性食品环境中检测到PBAT水解产物铁酸 (TPA).
结论:
- 在与食物接触时,PBAT膜会发生显著的变化,包括表面的修饰和降解.
- 小分子的迁移,如2,4-DTBP和TPA,从PBAT进入食物是一个关键问题.
- 调查结果提供了指导可持续发展和安全使用PBAT在食品包装中的基本数据.
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