Pembuatan dan Karakterisasi Bioplastik Pati Porang (Amorhophallus Oncophyllus)/Talas Beneng (Xanthosoma Undipes K. Koch) dengan Plasticizer Sorbitol

Abstract

Research has been carried out on the manufacture of bioplastics and chitosan with sorbitol plasticizer made using the melt intercalation method on variations of starch (porang/beneng) versus chitosan 30% : 70%, 40% : 60%, 50% : 50%, 60% : 40%, and 70%: 30% added sorbitol plasticizer with variations of 40%, 60% and 80%. Characterization carried out using physical and mechanical testing obtained tensile strength and elongation test values for the BPBA5 sample with a value of 3.671 Mpa; 19.9328%, BPBB4 sample with a value of 2.614 Mpa; 25.452%, BPBC1 sample with a value of 2.287 Mpa; 27,500%. And the respective water absorption tests were 35.18%; 36.07%; 28.57%. The degradability test showed a mass reduction over 28 days with the highest percentage of each variation of starch and chitosan by adding sorbitol plasticizer reaching 26.90%. The SEM results show that there is still mixing between starch and a less homogeneous solution as evidenced by several spots on the bioplastic which are still white, and the same groups are obtained between the bioplastic constituents, namely O-H, C-H, and N-H.