塑料包装材料内的小分子物质扩散系数模型

Models for Prediction of Diffusivity of Small Substances in Plastic Packaging Materials

试验表明,基于Fick扩散定律可对塑料包装材料内小分子物质向食品(模拟物)的迁移进行模拟预测。但无论是扩散模型的解析解或数值解,模型动力学控制参量扩散系数DP都必须是已知或可求的。近年来,开发高效实用的扩散系数预测模型成了迁移研究的一个重点方向。文中就四个常用的扩散系数模型作了分析比较。

Migration of small substances from plastic packaging materials into foods（simulants） can be modeled and predicted based on Fick＇ s Diffusion Law. Diffusivity, parameter of the migration model determining dynamic process should be known or able to be determined whenever considering the analysis or numerical solution of the model. Establishing new model for prediction of diffusivity is now a key and hot research area. Four famous models for diffusivity prediction were discussed.