Effect of Gelatinization Temperature and Chitosan on Mechanical Properties of Bioplastics from Avocado Seed Starch (Persea americana mill) with Plasticizer Glycerol
Ginting, Muhammad Hendra Sahputra
Tarigan, Fauzy Ramadhan
Singgih, Annisa Maharani
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Bioplastics are polymers which are derived from renewable biomass resources, such as starch, cellulose and lignin for plants and casein, protein and lipid for animals. The aim of this research to obtain the effect of gelatinization temperature and chitosan on the psychochemical properties of bioplastic. Starch is the raw material for bioplastics which extracted by the avocado seeds, then characterized to determine its chemical composition.The variation composition of avocado seed starch - chitosan used 7: 3, 8: 2 and 9: 1 and temperature bioplastic solution was varied at 80, 85 and 90 C. Bioplastics were analyzed physical and chemical properties. From the analysis, tbest condition of bioplastics obtained at temperature 90 C with comparison of mass starch - chitosan 7: 3 for tensile strength 5.096 MPa, elongation at break 14.016% and Modulus Young 36.359 MPa. From the results of FT-IR analysis indicated O-H group and N-H groups on bioplastics due to the addition of chitosan and glycerol. The results of mechanical properties were supported by Scanning Electron Microscopy (SEM) showed the bioplastic with chitosan as filler and plasticizer glycerol have the fracture surfaces were smooth and soft and a little cavity.