Abstract:Transglutaminase (TGase) was added to gelatin-CaCO3 mineral films and its effect on properties of gelatin-CaCO3 mineral films were studied. Thickness, gel strength, tensile strength (TS), elongation at break (EAB), water solubility (WS) and water vapor permeability (WVP) were characterized by scanning electric microscopy (SEM), rheological study and differential scanning calorie (DSC). The results showed that TGase treatment significantly increased (p≤0.05) the thickness, gel strength, TS and EAB of gelatin-CaCO3 mineral films by 19.69%, 17.24%, 28.05% and 21.27%, respectively; TGase treatment had no effect on the WS and WVP values of gelatin-CaCO3 mineral films. The TGase-treated films had rougher surfaces and cross-sections compared with the films without TGase. Rheological study showed that TGase significantly increased the viscosity. DSC confirmed the occurrence of cross-linking induced by TGase.
