| dc.description.abstract | Bioplastics are alternative materials to replace conventional plastic
packaging in order to reduce environmental pollution. Starch is a natural polymer
that can be used for the production of bioplastics because its source is abundant,
renewable and easily degraded. Jackfruit seeds can be used as raw material for
bioplastics because its contains starch. The aim of this study to determine the
characteristics of jackfruit seeds and determine the effect of chitosan and sorbitol
on the physicochemical properties of bioplastics from jackfruit seeds. Starch is
extracted from jackfruit seeds were then characterized to determine its chemical
composition. Do characteristics of FT-IR (Fourier Transform Infra Red), SEM
(Scanning Electron Microscope) and RVA (Rapid Visco Analyzer) on starch
jackfruit seeds. To obtain a starch bioplastics plasticizer sorbitol and chitosan is
added. In the manufacture of bioplastics starch composition jackfruit seeds -
chitosan used was 7: 3, 8: 2 and 9: 1 (g / g), while the concentration of sorbitol
used was 20%, 25%, 30%, 35%, and 40% by weight dry ingredients. Bioplastics
were analyzed physical and chemical properties as density, tensile strength,
elongation at break, Young's modulus, water absorption, FT-IR, SEM, and RVA.
From the results of FT-IR analysis indicated an increase in wave number 3336.85
cm-1 to 3657.04 cm-1 for the OH group and 1570.06 cm-1 to 1593.20 cm-1 for
the group NH on bioplastics due to the addition of chitosan and sorbitol. The
results of mechanical tests is further supported by analysis of scanning electron
microscopy (SEM) showing jackfruit seed starch has a small granule size with the
size of 7.6 μm and in bioplastics with chitosan filler and plasticizer sorbitol their
fracture surface is smooth and slightly hollow compared bioplastics without fillers
chitosan and plasticizer sorbitol. From the analysis of jackfruit seed starch
obtained water content of 6.04%, ash content of 1.08%, the starch content of
70.22%, 16.39% amylose content, amylopectin content of 53.83%, 4.68% protein
content, fat content 0.54%, gelatinization temperature of 88.82 ° C with a peak of
3276.5 cP viscosity and the best conditions of starch bioplastics jackfruit seeds
obtained at a ratio of starch: chitosan (w / w) = 8: 2 and the concentration of
plasticizer sorbitol 25% by a density value of 1.111 g / cm3, 13.524 MPa tensile
strength, elongation at break 14.67%, 92.188 MPa Young's modulus and water
absorption 45.84%. | en_US |
