Effects of Plasticizers on Physical and Mechanical Properties of Tamarind Kernel Powder-Gelatin Film

The flexibility and durability of biopolymers are enhanced by the supplementation of plasticizers. Various types of plasticizers are commonly utilized. This research aims to investigate the effects of different plasticizer types on the characteristics of biopolymer films prepared from tamarind kernel powder (TKP) and gelatin crosslinked with glutaraldehyde. Three types of plasticizers were examined: glycerol, sorbitol, and polyethylene glycol. The concentration of plasticizers was controlled at 1% w/w. The chemical and mechanical properties of the films were analyzed. The results indicated that the plasticizers differentially improved the mechanical properties of the biopolymer films. Additionally, the opacity, color, and water solubility of the films were influenced by the type of plasticizer used. The TKP-gelatin film supplemented with sorbitol exhibited improved mechanical properties, as indicated by both higher tensile strength and elongation at break, compared with that supplemented with glycerol and polyethylene glycol.