The Effect of Chitosan, Sorbitol, and Heating Temperature Bioplastic Solution on Mechanical Properties of Bioplastic from Durian Seed Starch (Durio zibehinus)

Nowadays, bioplastics is often researched to substitute the conventional plastics because bioplastics come from\ud raw materials that is very enviromentally friendly and bioplastics is degradable. The purposes of this research are\ud to know the characteristics of starch from durian seed and to know the effect of additional chitosan as filler,\ud sorbitol as plasticizer, and variation of heating temperature bioplastic solution on mechanical properties of\ud bioplastics. In process, the ratio between durian-seed starch and chitosan are 7:3, 8:2 and 9:1 gram, while the\ud concentration of sorbitol are 20%, 30%, and 40%. The heating temperature of bioplastic solution is varied at 70\ud oC, 80 oC and 90 oC. Result of bioplastic FTIR shows there is increation of wave number N-H from 1570.06 cm-\ud 1\ud to 1589.34 cm-1 and O-H from 3352.28 cm-1\ud to 3653.18 cm-1\ud . The characteristic of durian seed starch has water\ud content 12.73%, ash content 0,51%, starch content 76,65%, amylose content 22.34%, amylopectin content\ud 54.32%, protein content 11.61%, and fat content 0.61%. Optimum mechanical properties of bioplastic from\ud durian seed starch occurs in heating temperature 70 oC with composition between durian-seed starch and\ud chitosan is 7:3 grams and sorbitol 20.0 grams