Natamycin release from alginate/pectin films for food packaging applications

Author(s)

Krause Bierhalz, Andrea Cristiane ^[1] ; da Silva, Mariana Altenhofen ^[1] ; Kieckbusch, Theo Guenter ^[1]

Affiliation

^[1] Univ Estadual Campinas, Fac Engn Quim, UNICAMP, BR-13083852 Campinas, SP - Brazil

• Document type: Journal article
• Source: Journal of Food Engineering; v. 110, n. 1, p. 18-25, MAY 2012.
• Web of Science Citations: 74

Abstract

Single and composite films based on alginate and pectin containing natamycin as active agent were prepared and the release behavior in water and the diffusion coefficients were evaluated. The influence of natamycin on physical attributes of the films was also investigated. Addition of natamycin promoted an increase in soluble matter in water, in the water vapor permeability and in the opacity and a decreased in tensile strength when compared to films without the added anti-microbial agent. The natamycin mass released by immersion of the film in water fitted well to Fick's second law diffusional model, with effective diffusivity values ranging from 3.2 x 10(-9) (single pectin films) to 9.2 x 10(-12) cm(2)/s (single alginate films). The values of the diffusional exponents ranged between 0.5 and 1.0, suggesting that the transport process had non-Fickian (anomalous) characteristics. The single alginate films exhibit more suitable attributes for application in packaging than the single pectin and the composite films. (C) 2011 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 08/52830-9 - Preparation and characterization of active films based on LM-pectin and LM-pectin/alginate crosslinked with calcium
• Grantee: Andrea Cristiane Krause Bierhalz
• Support Opportunities: Scholarships in Brazil - Master