Pembuatan dan Karakterisasi Bioplastik Berbahan Dasar Pati Sukun (Artocarpus Altilis) dengan Variasi Penambahan Kitosan dan Sorbitol

Abstract

Bioplastics are plastics whose raw materials come from nature and can be degraded by the activity of microorganisms, so they do not pollute when discharged into the environment. Starch is the most widely used raw material in the manufacture of bioplastics with the addition of chitosan which functions as an antimicrobial, increases water resistance and tensile strength and sorbitol which functions as a material so that the plastic is flexible/not stiff. Blending method which is a method of mixing two or more ingredients into one. In this study, a comparison of variations between chitosan: sorbitol and sorbitol: chitosan was used with variations of 4:1, 4:1.5, 3:1, 3:1.5, 2:1, 2:1.5 (w/v) . The results of the tensile strength values of bioplastics were obtained at 94.3 MPa and 49.8 MPa, elongation values 23.7% and 21.4% and had met SNI, water absorption values were 270% and 116.67%, respectively. The results of the FT-IR spectrum show that there is no change in the groups in the composition with the functional groups O-H bending, C-H stetching, N-H and C-O. The results of the SEM analysis showed that the breadfruit starch bioplastic had an uneven and rough surface which was indicated by the number of white spots due to the less soluble starch. Bioplastics degrade within 7 days. From the above results, the optimum bioplastic variation of breadfruit starch was obtained at variations of 3ml sorbitol: 1g chitosan and 4g chitosan: 1ml sorbitol.