Chitosan is a derivative of chitin.
Adding glycerol has no effect on the water vapour permeability but affects the oxygen permeability ,which water vapour permeability dried at room temperature were different without LMw tend to higher HMw.
Chitosan film can absorb UV in the range 200-400 nm. It also has UV protection.
Mechanical properties of the films can be mainly linked to the physico-chemical characteristic of the chitosan/glycerol.
chitosan-based films can exhibit bacteriostatic effect against E. coli and L. plantarum.