Development of a biomaterial based on chayotextle starch (Sechium Edule)-gelatin blend. Molecular, mechanical, physical, barrier and structural properties

Films made from a mixture of Chayotextle starch-Gelatin (SG) were prepared in concentrations of SG13, SG22 and SG31 respectively. Two controls were considered; gelatin (G) and starch films (S). Glycerol was added as a plasticizer to all treatments at 2%. G treatment presented higher elasticity, permeability and solubility in comparison to those treatments using starch. FT-IR showed that both ingredients gelatin and starch respected their molecular spaces. However, their contribution was relevant for the formation of the matrix of films. The lowest percentage of crystallinity appeared in S films with 30.8%. This value increased up to 48.5 % in the G treatment. The variation of ratios in the mixture gelatin-starch resulted in different degrees of structural composition and these changes could be configured, adapted and applied to the requirements of the food engineering, pharmaceutical, and biomedical industry.