Journal of Thermal Analysis and Calorimetry,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 27, 2024
Abstract
This
study
focuses
on
the
development
of
bioactive
packaging
materials
by
incorporating
grape
pomace
and
copper
particles
into
polylactic
acid
(PLA)
composites.
The
goal
is
to
increase
shelf
life
packaged
foods
while
benefiting
health
consumers
through
use
these
active
materials.
6
recipes
composite
based
Proviplast
2624
plasticizer
were
obtained.
additives
added
were:
pomace,
at
0.5%,
1%
1.5%,
particles,
formed
using
PEG
600
+
CuSO₄,
2%,
5%
8%.
Material
characterization
techniques:
FTIR
Spectroscopy,
used
chemical
structure.
Differential
scanning
calorimetry
(DSC):
examined
thermal
transitions
such
as
glass
transition
melting
temperatures.
Thermogravimetric
analysis
(TGA)
differential
thermogravimetry
(DTG):
evaluated
stability
degradation
Scanning
electron
microscopy
(SEM)
atomic
force
(AFM):
analyzed
surface
morphology
Mechanical
tests:
tensile
strength,
elongation
break
flexibility.
Thermal
property
analyzes
revealed
that
acted
plasticizers,
reducing
intermolecular
forces
between
PLA
chains,
which
decreased
temperature
(Tg),
cold
crystallization
(Tcc)
(Tm).
addition
composites,
indicating
a
slight
reduction
in
stability.
transformation
temperatures
changed
nature
(exothermic
or
endothermic)
varied
with
additive
concentrations.
properties
indicated
strength
increasing
concentration.
Elongation
longitudinal
modulus
elasticity
increased
significantly,
especially
improving
flexibility
PLA.
These
changes
indicate
material
can
absorb
more
energy
before
breaking,
making
it
ductile
suitable
for
flexible
applications.
Increased
improved
resistance
ensure
withstand
demands
packaging,
handling
shipping.
combination
flexibility,
moderate
makes
PLA-based
composites
incorporated
enhance
aspect
sustainability
recycling
agricultural
waste,
both
ecological
functional,
viable
option
food
packaging.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 8, 2025
Abstract
Polymeric
materials
featuring
excellent
flame
retardancy
are
essential
for
applications
requiring
high
levels
of
fire
safety,
while
those
based
on
biopolymers
highly
favored
due
to
their
eco‐friendly
nature,
sustainable
characteristics,
and
abundant
availability.
This
review
first
outlines
the
pyrolysis
behaviors
biopolymers,
with
particular
emphasis
naturally
occurring
ones
derived
from
non‐food
sources
such
as
cellulose,
chitin/chitosan,
alginate,
lignin.
Then,
strategies
chemical
modifications
flame‐retardant
purposes
through
covalent,
ionic,
coordination
bonds
presented
compared.
The
is
placed
advanced
methods
introducing
biopolymer‐based
retardants
into
polymeric
matrices
fabricating
materials.
Finally,
challenges
sustaining
current
momentum
in
utilization
further
discussed.
Compounds,
Год журнала:
2025,
Номер
5(1), С. 4 - 4
Опубликована: Фев. 3, 2025
The
depletion
of
fossil
fuels
and
environmental
concerns
have
driven
the
development
sustainable
materials,
including
bio-based
biodegradable
plastics,
as
alternatives
to
conventional
plastics.
Although
these
plastics
aid
in
waste
management
climate
change
mitigation,
their
vulnerability
oxidative
degradation
impacts
longevity,
durability,
performance.
Natural
antioxidants
such
tocopherols,
flavonoids,
tannins,
extracted
from
plants
or
agri-food
waste,
present
a
alternative
synthetic
stabilizers
by
enhancing
thermal
stability
polymers
like
poly(lactic
acid)
(PLA),
poly(butylene
succinate)
(PBS),
succinate-adipate)
(PBSA),
adipate-co-terephthalate)
(PBAT),
poly(hydroxyalkanoate)
(PHA),
starch-based
materials.
This
review
highlights
recent
advances
stabilized
with
natural
antioxidants,
mechanisms
action,
role
improving
material
properties
for
applications
packaging.
Additionally,
it
explores
impact
on
recycling
processes,
advancements
composite
production
techniques,
future
research
directions.
Bioplastics
can
achieve
enhanced
performance,
reduce
support
circular
economy
incorporating
antioxidants.
Polymer,
Год журнала:
2024,
Номер
308, С. 127361 - 127361
Опубликована: Июль 5, 2024
This
study
focuses
on
developing
environmentally
friendly
plasticized
poly(lactide)
(PLA)
formulations
using
tartaric
acid
and
α-tocopherol
at
20
wt%.
The
extrusion
injection
molding
processes
demonstrated
the
industrial
applicability
of
these
plasticizers.
Mechanical
tests
revealed
positive
results
for
tartrate-based
plasticizers,
with
elongation
break
surpassing
220
%,
while
succinate
achieved
170
%.
However,
acetate
showed
limited
PLA
plasticization.
Field
emission
scanning
electron
microscopy
confirmed
plasticization
in
fractured
surfaces.
Thermal
analysis
indicated
a
reduction
PLA's
glass
transition
temperature
(Tg)
from
60
°C
to
around
30
underscoring
tartrates'
exceptional
efficiency.
cold
crystallization
(Tcc)
decreased
all
samples
due
enhanced
chain
mobility.
Thermomechanical
dimensional
shrinkage,
dimethyl
tartrate
(DMT)
causing
less
pronounced
effects.
Generally,
tartrates
yielded
superior
properties,
attributed
their
lower
molecular
weight
compared
α-tocopherol-derived
Notably,
plasticizers
employed
are
an
eco-friendly
approach
improve
processability
enhancing
ductile
properties.
