| dc.description.abstract | Abstract— One of the solutions to the plastic pollution crisis is
biodegradable plastic. The most efficient raw material for
making biodegradable plastic is cassava starch, but it has a
weakness in that natural fibers are generally added as
reinforcement and natural filler. In this study, Robusta coffee
skin fiber was used as a reinforcement for biodegradable plastic.
To obtain the right variation of coffee skin composition, this
study applied a completely randomized design (CRD) with two
factors. The parameters observed in this study were thickness,
water absorption, biodegradation, tensile strength, elongation,
and modulus of elasticity. Data were analyzed using descriptive
statistics and ANOVA test, coupled with the effectiveness index
test was carried out. The results showed a thickness value of
0.703 – 1.007 mm. The value of water absorption is between 3.437
– 13.512 %. The resulting biodegradation value is between 32.914
– 68.971%. The tensile strength value is 19,056 – 46,507% and it
is directly proportional to the modulus of elasticity, which is
produced between 2.557 – 16.442 Mpa. The effectiveness index
test demonstrated that the best treatments were obtained from
the addition of 15% coffee skin with 20% glycerol, 10% glycerol
with 20% coffee skin, and 5% glycerol with 20% coffee skin. | en_US |
