Release Mathematical Model of Active Agent from Packaging Material into Food (original) (raw)

Active packaging is an innovative packaging technology by which active compounds are released from the package to enhance the quality and microbial safety for a wide range of foods. The problem of active ingredient release through the bilayer packaging food system is studied from a theoretical viewpoint. A release model is built to provide predictions of concentration and amount of active ingredient. The equations are built based onFickiandiffusion, and numerical solutions are obtained through finite difference. Different diffusion coefficientsDPandDCof active ingredient in different packaging layers, partition coefficientkCPat the interface of outer layer and inner layer, partition coefficientkFCat the interface of inner layer and food, and mass transfer coefficienthmat the interface of inner layer and food are considered in the model. The effects ofkCP, thicknesses of outer layer and inner layer,CP0,DP,DC,kFC, andhmon the release are discussed. Corresponding conclusions and analys...