Abstract: The article reported the laboratory experiment to
obtain the optimal condition of particle size and Reynold Number of bioplastic
film based on the plastic package standard of High Density Polyethylene
(HDPE). Particle sizes of starch were varied at 63, 90, 106, 600, and 1000
micron, and the
mixing rate were
changes at 190,
252, 313, 375,
and 437 rpm. The
concentration of chitosan
and gliserol added
to solution were
set as constant variable as
20 and 10
wt %, respectively.
The temperature of
gelatinitation was also fixed
at 95OC. The
fabricated of bioplastic
film were characterized
for mechanical property such
as tensile strength,
elongation at break
and Modulus Young
by using a Universal Testing
Machine. The morphology
of film sheets
were observed by
using a scanning electron
microscopy (SEM). Moreover, the obtained film was also investigated for water
uptake parameter. The
result showed that
the mechanical properties
were improve by increasing mixing rate at smallest particle sizes of
starch. The water uptakes shows
decrease at hight
mixing rate. SEM
images showed that
the morphology of bioplastic was almost simmilar to the
morphology of HDPE. The optimum condition was found that
the best film
was obtained at
particle size of
starch 63 micron,
Reynold Number of 959, with
mixing rate of 375 rpm. The mechanical
value at best condition was 19.27%, 757.046
Mpa, and 142.875
for elongation, Modulus
Young, and tensile strength, respectively.
Keywords: bioplastic, reynold Number, starch, sorgum
Penulis: Yuli Darni
Kode Jurnal: jpkimiadd110009
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