While a continuous structure was observed for the chitosan film the presence of essential oil the presence
of essential oil (Fig. 5b–d) caused a heterogeneous structure in which oil droplets were entrapped in the continuous carbohydrate network.The number and size of the lipid droplets were increased
with the essential oil concentration. Little creaming was observed in the emulsified films at 10% and 20% w/w essential oil concentration,probably due to the reduction of oil droplet mobility induced
by the highly viscous effect of chitosan, which, increased when drying progressed