Pemanfaatan Pati Talas Beneng (Xantoshoma Undipes K.Koch) pada Pembuatan Bioplastik dengan Plasticizer Sorbitol dan Karakterisasinya

Abstract

Research has been conducted on the manufacture of bioplastics and chitosan with with sorbitol plasticizer was made by varying starch and chitosan in the ratio of 30%: 70%, 40% : 60%, 50% : 50%, 60% : 40%, and 70% : 30% and added sorbitol plasticizer with variations of 40%, 60%, and 80%. Characterization was carried out on the composition of starch and chitosan with the addition of sorbitol plasticizer starting with physical and mechanical testing, then obtained 3 bioplastics with show the highest test value according to elongation data, code in sample BPBA4 with a ratio of starch and chitosan 60% : 40% with addition of 40% sorbitol plasticizer showed an elongation value of 16,6782% and tensile strength of 7,8176 MPa, sample BPBB4 in the ratio of starch and chitosan 60% : 40% by adding sorbitol plasticizer showed an elongation value 21,68898% and tensile strength of 1,7352 MPa, and sample BPBC1 with a ratio of starch and chitosan 30% : 70% with the addition of 80% sorbitol plasticizer showed an elongation value of 23, 3997% and tensile strength of 2,3997 MPa. The biodegradability test on bioplastics showed a mass reduction for 4 weeks and 28 days with the highest percentage of each variation of starch and chitosan by adding sorbitol plasticizer reaching 19,38%. SEM results show that there is still mixing at between starch and a less homogeny solution as evidenced by several points on bioplastics that are still white, and the same groups are obtained between the constituents of bioplastics, namely O-H, C-H, and N-H.