| dc.description.abstract | Bioplastics are polymers derived from renewable biomass sources, such as starch, cellulose
and lignin for the plant as well as casein, proteins and lipids for the animals. The purpose of
this study to determine the characterization of avocado seed and determine the effect of
chitosan and ethylene glycol on the physicochemical properties of bioplastics from waste
avocado seed. Avocado seeds can be used as a raw material for starch bioplastics. Starch
which is a raw material for bioplastics extracted from the seeds of avocado, then
characterized to determine its chemical composition. Analysis was also performed FT-IR
(Fourier Transform InfraRed), SEM (Scanning Electron Microscope) and RVA (Rapid Visco
Analyzer) in the avocado seed starch. Manufacture of bioplastics refers to weiping band
methods, which performed chemical modification of starch with the addition of plasticizers
and fillers ethylene glycol chitosan. In the manufacture of bioplastics starch composition
avocado seed - chitosan used is 5: 5, 6: 4 7: 3, 8: 2 and 9: 1, while the weight% ethylene
glycol used is, 5%, 10%, 15%, 20%, 25% and 30%. The heating temperature of bioplastic
varied solution at 85 °C. The resulting bioplastics analyzed the physical and chemical
properties like 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
the wave number 3394.72 cm-1 to 3622.32 cm-1 for the OH group. The results of
mechanical tests are further supported by analysis of scanning electron microscopy (SEM),
which shows the avocado seed starch granules have a size large and bioplastics with filler
and chitosan plasticizer ethylene glycol their rough fracture surface and contained little
cavity. From the analysis of the avocado seed starch obtained 16.6% moisture content, ash
content of 0.23%, the starch content of 73.62%, 0.07% amylose content, amylopectin
content of 73.55%, 2.16% protein content, fat content 1.09%, gelatinization temperature of
91.33 ° C with a peak viscosity of 674.5 cP and the best conditions of starch bioplastics
avocado seeds obtained in the comparison of starch: chitosan (w / w) = 6: 4 with the
addition of 5% plasticizer ethylene glycol with a density value of 0.203 g/cm3, the tensile
strength of 30.213 MPa, elongation at break 5.370%, Elastic modulus 2031.326 MPa and
water absorption of 53.06%. | en_US |
