4. Conclusions
In this study, improvement of fish gelatin film properties was investigated by Ch association. Fish gelatin and Ch were totally compatible to form solutions and films. The addition of these negatively charged polysaccharides could improve the properties of films made from fish gelatin by improvement mechanical properties and decreasing permeability. Hence, it is possible to replace mammalian gelatin in some applications. Moreover, the concentration of the two biopolymers in the film affected the physical, mechanical and optical properties of the films to various extents. In this case, The film prepared with the blend 60G:40Ch was found to be the best as it had lower water vapour permeability and film solubility. These results suggest a high potential of these films to be used as active packaging materials, and further studies would be required to determine the use of these films in commercial food systems.