Development and characterization of biodegradable chitosan films containing two essential oils

Poly[(3‐hydroxybutyrate)‐co‐(3‐hydroxyvalerate)] active bilayer films obtained by compression moulding and applying essential oils at the interface

“…Incorporation of some additives to polymer matrices usually results in a reduction of the thermal resistance of the network due to the weakening effect of the chain bonds . Nevertheless, some authors reported an increase in the polymer thermal resistance when some essential oils are added. Among all formulations, the film with CLO is the most thermally resistant, which could be associated with stronger interactions between PHBV and some components of the EO, thus reinforcing the polymer network.…”

Influence of liposome encapsulated essential oils on properties of chitosan films

“…The equilibrium moisture content of the films decreased significantly when both free and encapsulated lipid compounds were added, since the proportion of active sites for water adsorption per unit dry mass decreases . Likewise, possible interactions between the CH chains and the active compounds could reduce the availability of the CH polar groups to form hydrophilic bonds with water molecules . Compared to the films with non‐encapsulated active compounds, lecithin incorporation resulted in a significant WVP decrease.…”

Different strategies to obtain antimicrobial biodegradable films for food applications, using starch and/or chitosan with or without essential oils

“…The films with this lipid showed improved water barrier properties, higher tensile strength and lower stretchability. Similar results were observed by Shen & Kamdem (2015) for CH films containing citronella and cedarwood essential oils. found that the induced close contact polymer-oil caused by high pressure homogenization gave rise to more fragile films of increased stretchability, due the weakening effect on the chitosan matrix where chain interaction forces are reduced.…”

“…Likewise, possible interactions between the chitosan chains and the active compounds could reduce the availability of the chitosan polar groups to form hydrophilic bonds with water molecules (Shen & Kamdem, 2015). As compared to the films with non-encapsulated active compounds, lecithin incorporation resulted in a significant WVP decrease.…”