Study on Preparation and Migration Behavior of Polyvinyl Alcohol Active Packaging Film Based on Clove Essential Oil/β-Cyclodextrin Inclusion Complex

Active packaging film was prepared using polyvinyl alcohol (PVA), as film forming material, and inclusion complexes composed of cyclodextrin and clove oil, as active agents. Scanning electron microscopy was used to characterize the membrane. Aspergillus niger was used to test anti-fungal properties for the active packaging film. Moreover, migration behavior of the clove oil in PVA active packaging film was also studied and results showed that the microcapsule particles were evenly distributed in the active packaging film. The active packaging film had a clear inhibitory effect on the Aspergillus niger. Migration occurred in the following 3 kinds of solvents; 3% acid, 10% ethanol and olive oil. However, the migration rate was not the same in different solvents. The Clove oil migrated fastest in the olive oil. Moreover, the speed of clove oil for achieving a balanced migration was not the same in different solvents. Concentration of clove oil that reached equilibrium in the olive oil took 32 h, while ethanol took 72 h and acetic acid 80 h. Temperature had the effect on migration of clove oil in ethanol and acetic acid. In addition, the faster rate for migration was with the higher temperature.