Chitosan film is regarded as biofunctional material, well
tolerated by living tissues, particularly applicable as edible
coatings to prolong shelf-life and preserve quality of fresh
foods[6]. In medical field, chitosan films have been tested
as curative wound dressing and as scaffolds for tissue and
bone engineering[7]. Additionally the reactive functional
groups present in chitosan (amino group at the C2 position
of each deacetylated unit and hydroxyl groups at the C6
and C3 positions) can be readily subjected to chemical
derivatization allowing the manipulation of mechanical and
solubility properties[8] enlarging its biocompatibility