Antimicrobial properties of chitosan and chitosan laminated films
Chitosan and chitosan laminated films containing
antimicrobial agents provide a type of active package
such that the preservatives released from the film deposit
on the food surface and inhibit the microbial growth [65,
74]. Torres et al. [77] evaluated the sorbateloaded edible
barrier for mold inhibition on food surfaces, and Field et
al. [78] advocated the use of glucose oxidase/glucose as
a dip for extension of shelf life of ®sh. The presence of
preservatives in chitosan films reduces the intermolecular electrostatic repulsion in the chitosan molecules and facilitates formation of intramolecular
hydrogen bonds [79]. Chen et al. [74] have observed that
the packaging film prepared from methylcellulose, chitosan and preservatives possesses antimicrobial activity.