DefinePK

Abstract

The work was aimed to determine the characteristics of jackfruit seeds and investigate the effect of chitosan and sorbitol on the physicochemical properties of bioplastics. Bioplastics were prepared from jackfruit seed starch and reinforced with chitosan with composition ratio were 7: 3, 8: 2 and 9: 1 (w/w) and using sorbitol as plasticizer with variation of 0.2, 0.25, 0.3, 0.35, and 0.40 (v/w of starch). The jackfruit seed starch has water content 6.04%, ash content 1.08%, protein content 4.68%, fat content 0.54%, starch content 70.22% with amylose content 16.39% and amylopectin content 53.83%. Gelatinization profil of jackfruit seed starch was performed by rapid visco analyzer (RVA). The starch began to gelatinize at temperature of 88.82 oC. Physical properties of bioplastic were tested through density, water uptake and FT-IR analysis. It was observed that the density increased as the amount of the chitosan increased but the water uptake decreased and indicated an increase for the OH group and the group NH on bioplastics due to the addition of chitosan and sorbitol. The best conditions of bioplastics obtained at a ratio of starch: chitosan (w/w) = 8: 2 and the concentration of plasticizer sorbitol 25% with tensile strength 13.524 MPa, elongation at break 14.67%, and modulus young 92.188 MPa. The analysis of scanning electron microscopy (SEM) showing bioplastic has a smooth fracture surface and slightly hollow compare to bioplastic without fillers chitosan and plasticizer sorbitol.