Pengaruh Penambahan Variasi Plasticizer Sorbitol terhadap Karakterisasi Bioplastik Pati Porang (Amorphophallus Oncophyllus) dan Kitosan

Abstract

Research has been carried out on the manufacture of bioplastics with variations in the composition of porang starch: chitosan with glycerol plasticizer and the effect of adding sorbitol (0%, 25%, 50%, 75%, 100%) with the melt intercalation method, at a gelatinization temperature of 800C and a burning temperature of 700C. Physical test results obtained with the highest thickness value of 0.28 mm; the highest density is 1.8448 gr/mm3; the highest water absorption is 36.36%. The highest tensile strength value was found in bioplastics with 80% glycerol plasticizer and the addition of 75% sorbitol variation of 0.7797 MPa. While the lowest value of the tensile strength of bioplastics with 100% glycerol plasticizer with the addition of 50% sorbitol was 0.3280 MPa. The highest elongation value was found in bioplastics with 80% glycerol plasticizer and the addition of 75% sorbitol variation of 155.20%. While the lowest elongation value of bioplastics with 80% glycerol plasticizer with the addition of 25% sorbitol variation was 36.24%. The percentage of degradation until the fourth week increases every week to the highest percentage of 46.89%. The SEM results with 1000 and 2000 times magnification respectively showed that there was still agglomeration due to the influence of gelatinization temperature and homogeneity. The FT-IR results showed the same groups as the constituent components, namely O-H, C-H, and N-H.