Agar-based packaging films produced by melt mixing: Study of their retrogradation upon storage

The ability of agar with different purification degrees to produce packaging films has been evaluated and the stability obtained materials after prolonged storage investigated. less purified resulted in higher water vapor permeability lower mechanical performance than pure commercial agar. However, film required addition a plasticizer that could be manipulated. It also observed at 53 % RH results change semi-crystalline structure water-polysaccharide interactions. As result, undergo rigidizing effect resulting unmanageable 7 days storage. presence glycerol improved by limiting structural changes up 14 In contrast, from least extract, seemed affected moisture, showing during This points potential extract used as an additive reduce costs improve films.