Objective: Jackfruit (Artocarpus heterophyllus) is a tropical fruit that has high
amylose content in its seeds similar to sago starch. Thus, jackfruit seeds and sago are suitable
raw materials for the production of biodegradable plastic (BGP). The objective of this research
is to investigate the physical and mechanical properties of BGP produced from the
blend of jackfruit seed and sago starch.
Methods: The BGP was prepared by mixing different ratios of the jackfruit seed flour to the
sago flour in distilled water with the addition of 0.1 M hydrochloric acid (HCl). The mixture
was stirred and heated at 80oC and later mixed with glycerol. The mixture was neutralized
with 0.1 M sodium hydroxide (NaOH) and was cast by using the casting plate technique.
Results: The results showed that the optimum tensile strength was obtained at 2.06 MPa. at
the blend ratio of 7:3. The maximum absorption rate of water ranged from 32 % to 34 % occurred
at the blend ratio of 1:9 while the lowest absorption rate ranged from 21% to 26% occurred
at the blend ratio of 5:5. The degradability of BGP was indicated by decreasing the
FT-IR spectra peaks intensity and broadening of the bandwidth due to the degradation of
starch in the BGP.
Conclusion: The blend ratio of 10:0 showed the highest degradability rate. Conclusively,
that the physical and mechanical properties are affected by the blend ratios.
Keywords: Jackfruit seed, sago starch, biodegradable plastic, mechanical properties, physical properties,
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