Controlled Release of Potassium Sorbate from Pectin/Carboxymethyl Cellulose Active Films

Abstract

The aim of this study was to evaluate the kinetics of potassium sorbate (PS) from low methoxyl pectin/carboxymethyl cellulose (LMP/CMC) films with montmorillonite (MMT) and CaCl2 into food simulant. The release kinetics of PS were described using Fickian model. The content of MMT was ranged from 0 to 12%, and the corresponding diffusion coefficients were obtained from 0.96×10-12 to 0.23×10-12 cm2·s-1. The content of CaCl2 was ranged from 1% to 8%, and the corresponding diffusion coefficients were obtained from 0.96×10-12 to 0.32×10-12 cm2·s-1. The results shown that the addition of MMT and CaCl2 decrease or declay the release rate of PS from film matrixes. The addition of MMT and CaCl2 also resulted into the decreasing of partition coefficient, significantly. The results indicate that the film has a good potential to achieve a controlled release in antimicrobial packaging.