This research was made possible by the financial support of Programme Canadien des Bourses de la Francophonie, Agence Canadienne de Développement International, Ottawa, Ontario, Canada. The authors thank Dr. Henry Schwartzberg for his invaluable comments and suggestions, which greatly helped improve this manuscript.
Diffusion of Acetic and Propionic Acids from Chitosan-based Antimicrobial Packaging Films
Article first published online: 20 JUL 2006
Journal of Food Science
Volume 65, Issue 5, pages 768–773, August 2000
How to Cite
Ouattara, B., Simard, R.E., Piette, G., Bégin, A. and Holley, R.A. (2000), Diffusion of Acetic and Propionic Acids from Chitosan-based Antimicrobial Packaging Films. Journal of Food Science, 65: 768–773. doi: 10.1111/j.1365-2621.2000.tb13584.x
- Issue published online: 20 JUL 2006
- Article first published online: 20 JUL 2006
- MS 19990814 received 8/10/99; revised 1/14/00; accepted 4/10/00.
The diffusion of acetic or propionic acids from thin (44 to 54 μm) chitosan-based antimicrobial packaging films in which they were incorporated was measured after immersion of the films in water, and the effects of pH (5.7, 6.4, or 7.0) and temperature (4 °C, 10 °C, or 24 °C) on diffusion were investigated. The kinetics of acetic- and propionic-acid release deviated from the Fickian model of diffusion. Diffusion was found to be unaffected by pH in the range of values tested, but a decrease in temperature from 24 °C to 4 °C resulted in a reduction of diffusion coefficients from 2.59 × 10−12 m2.s−1 to 1.19 × 10−12 m2.s−1 for acetic acid and from 1.87 × 10−12 m2.s−1 to 0.91 × 10−12 m2.s−1 for propionic acid. The effect of temperature on diffusion was well (r2 > 0.9785) described by an Arrhenius-type model with activation energies of 27.19 J.mole−1 (acetic) and 24.27 J.mole−1 (propionic). Incorporation of lauric acid or essential oils (cinnamaldehyde or eugenol) into the chitosan film at the time of preparation produced a subsequent reduction in the diffusion of acetic or propionic acid, and maximum effects were obtained with lauric acid and cinnamaldehyde incorporated to final concentrations of 1.0% and 0.5% (w/w), respectively.