Radiation Synthesis And Modification Of Polymeric Material Applied In Food Packaging And Their Bioactivity And Biodegradation
Nada Rabi Ahmad Nasef;
Abstract
Abstract
Blends of biodegradable copolymer based on starch, poly lactic acid (PLA),
poly vinyl alcohol (PVA) and natural rubber (NR) have been prepared. Gamma
radiation
induced
synthesis
and
modification
of
polymer
hydrogel
was
studied.
The
polymer
blends
have
been
chemically
surface
modified
by
glycerol.
The
modified
polymer blends have been investigated for swelling ratio,
ensile strength and 9 scanning electron microscopy. The swelling ratio of po
ymer
blends
increased
significantly
after
surface
modification
with
glycerol.
The
swelling
of
polymer
was
decreased
as
a
function
of
(NR)
content
in
polymer
blends.
The
gel
fraction
(PVA-starch-PLA)
and
(PVA-starch-NR)
blends
ncreased
by
increasing
the
radiation
doses
(kGy)
to
reach
the
maximum
amount
of
(~99%)
and
(~88.2%),
respectively.
Addition
of
2.5%
(PLA)
led
to
greater increase of the swelling ratio than 10% (NR) to blends and the maximum
swelling
was
found
at
dose
(5
kGy).
At
concentration
of
glycerol
(5.0%
w/w),
tensile
strength
decreased
and
elongation
at
break
%
increased.
The
po
ymers
degrading
microorganisms
were
isolated
from
soil
samples.
The
degradation
ability
of
the
microbial
isolates
for
each
polymeric
material
was
ested
on
agar
plates.
Among
these
isolates,
the
most
efficient
degrader
iso
ates
for
prepared
blends
in
MSM
shaking
flasks
were
selected
and
the
degradation
was
confirmed
by
scanning
electron
microscopy.
Blends of biodegradable copolymer based on starch, poly lactic acid (PLA),
poly vinyl alcohol (PVA) and natural rubber (NR) have been prepared. Gamma
radiation
induced
synthesis
and
modification
of
polymer
hydrogel
was
studied.
The
polymer
blends
have
been
chemically
surface
modified
by
glycerol.
The
modified
polymer blends have been investigated for swelling ratio,
ensile strength and 9 scanning electron microscopy. The swelling ratio of po
ymer
blends
increased
significantly
after
surface
modification
with
glycerol.
The
swelling
of
polymer
was
decreased
as
a
function
of
(NR)
content
in
polymer
blends.
The
gel
fraction
(PVA-starch-PLA)
and
(PVA-starch-NR)
blends
ncreased
by
increasing
the
radiation
doses
(kGy)
to
reach
the
maximum
amount
of
(~99%)
and
(~88.2%),
respectively.
Addition
of
2.5%
(PLA)
led
to
greater increase of the swelling ratio than 10% (NR) to blends and the maximum
swelling
was
found
at
dose
(5
kGy).
At
concentration
of
glycerol
(5.0%
w/w),
tensile
strength
decreased
and
elongation
at
break
%
increased.
The
po
ymers
degrading
microorganisms
were
isolated
from
soil
samples.
The
degradation
ability
of
the
microbial
isolates
for
each
polymeric
material
was
ested
on
agar
plates.
Among
these
isolates,
the
most
efficient
degrader
iso
ates
for
prepared
blends
in
MSM
shaking
flasks
were
selected
and
the
degradation
was
confirmed
by
scanning
electron
microscopy.
Other data
| Title | Radiation Synthesis And Modification Of Polymeric Material Applied In Food Packaging And Their Bioactivity And Biodegradation | Authors | Nada Rabi Ahmad Nasef | Issue Date | 2018 |
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