Migration of styrene from plastic packaging based on polystyrene into food simulants
Migration of styrene from plastic packaging based on polystyrene into food simulants
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DOI：
10.1002/pi.3161
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发表时间：
2012-01-01
影响因子：
3.2
通讯作者：
Paraskevopoulou, Adamantini
中科院分区：
文献类型：
--
作者：
Paraskevopoulou, Despoina;Achilias, Dimitris S.;Paraskevopoulou, Adamantini
塑料包装材料中潜在有毒物质的迁移在食品工业中非常重要，因为它决定了聚合物在食品包装中的适用性。在这项工作中，介绍了苯乙烯单体从基于硬质或泡沫聚苯乙烯的塑料包装中迁移的结果。水、乙醇/水溶液和异辛烷（类似油）被认为是食品模拟物。实验在不同温度下进行，迁移测试时间为 30 分钟至 30 天。使用具有外部校准和苯乙烯标准溶液的气相色谱法进行测量。除了在高温和长时间的情况下之外，在水中没有测量到苯乙烯，而乙醇/水中的苯乙烯含量总是大于异辛烷中的苯乙烯含量。最后，使用基于菲克扩散方程的严格模型估算了所有不同实验条件下的苯乙烯扩散系数，并评估了单体在两相之间的分配，从而评估了迁移过程的活化能。版权所有(C)2011 中国化工学会
Migration of potentially toxic substances from plastic packaging materials is very important in the food industry since it determines the suitability of polymers when used in food packaging. In this work, results are presented on the migration of styrene monomer from plastic packaging based on either rigid or foamed polystyrene. Water, ethanol/water solution and isooctane (resembling oil) were considered as food simulants. Experiments were carried out at various temperatures and migration was tested from 30 min to 30 days. Measurements were carried out using gas chromatography with external calibration and styrene standard solutions. No styrene was measured in water, except at high temperatures and long time periods, while the amount in ethanol/water was always grater than that in isooctane. Finally, the styrene diffusion coefficients for all the various experimental conditions were estimated using a rigorous model based on the Fick diffusion equation and the partitioning of the monomer between the two phases and consequently the activation energy of the migration process was evaluated. Copyright (C) 2011 Society of Chemical Industry