RSC Advances,
Год журнала:
2025,
Номер
15(4), С. 2766 - 2778
Опубликована: Янв. 1, 2025
This
study
investigates
the
development
and
characterization
of
a
novel
composite
material
consisting
polyvinyl
alcohol
(PVA)
integrated
with
Uncaria
gambir
(UG)
zinc
oxide
(ZnO)
as
fillers.
The
synergistic
effects
UG
ZnO
were
investigated,
focusing
on
their
ability
to
enhance
film's
properties.
UV-vis
spectrophotometry
demonstrated
that
film
effectively
blocked
all
UV
(UV-A
UV-B)
blue
light
wavelengths.
mechanical
properties
significantly
enhanced,
tensile
strength
improving
by
56%
elasticity
38%
compared
pure
PVA.
Additionally,
water
contact
angle
measurements
showed
an
increase
from
34.4°
for
PVA
84.4°
PVA/UG/ZnO
composites,
indicating
substantial
improvement
in
hydrophobicity,
which
suggests
potential
extended
application
environments
where
moisture
resistance
is
crucial.
These
findings
illustrate
utilizing
natural
extracts
metal
oxides
polymer
composites
applications
require
durable
effective
protection
against
photodegradation
environmental
factors.
establishes
foundation
further
exploration
into
biocompatible
environmentally
sustainable
materials
enhanced
protective
RSC Advances,
Год журнала:
2024,
Номер
14(40), С. 29624 - 29635
Опубликована: Янв. 1, 2024
Developing
a
simple
and
environmentally
friendly
method
to
vary
the
physical,
mechanical,
thermal
properties
of
cellulose
films
is
great
importance.
This
study
aimed
characterize
2,2,6,6-tetramethylpiperidinyl-1-oxyl
(TEMPO)-oxidized
bacterial
(BC)
prepared
using
non-pressurized
hot
water
vapor
(NPHWV)
method.
A
wet
BC-pellicle
that
had
been
oxidized
with
TEMPO
was
treated
NPHWV
for
60,
120,
240
minutes,
respectively.
As
control,
TEMPO-oxidized
BC
(TOBC)
film
without
prepared.
The
results
show
longer
duration
TOBC
increased
tensile
properties.
became
more
hydrophobic
showed
lower
moisture
absorption,
conductivity
organic
solvent
uptake,
crystalline
structure,
higher
fiber
density
after
treatment.
acquired
provide
simple,
inexpensive,
ecologically
varying
Polymer Composites,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 6, 2025
Abstract
This
work
was
focused
on
the
changes
in
structural
features
of
pistachio
shell
(PS)
waste
upon
alkaline
and
ultrasound
treatment
their
potential
as
sustainable
reinforcement
fillers
starch‐based
films
(SF).
Scanning
electron
microscopy
analysis
revealed
etching,
thinning,
cavities
surface
PS
after
alkaline/ultrasound
treatment,
which
allowed
NaOH
species
to
act
internally
microstructure
PS,
promoting
alteration
functional
groups
CO
CO
hemicellulose
lignin
molecules,
well
an
increment
crystallinity
index
from
31.41%
46.91%.
X‐ray
photoelectron
spectroscopy
used
identify
oxidation
mechanism
modified
added
a
starch
matrix.
The
atomic
ratio
hydroxyl
decreased,
leading
increase
stronger
OCO
(from
5.98–17.91%)
OC
bonds
15%
27.49%)
interactions.
Thermogravimetric
confirmed
interaction
between
increased
storage
modulus
198
MPa
up
721
MPa,
thereby
increasing
rigidity.
compatibility
enhancement
may
interest
packaging
industry
those
looking
develop
scalable
process.
Highlights
Alkali/ultrasound
determined
modification
degree.
treatments
disturbed
hydrogen
lignocellulosic
components.
Pistache
shells
reduced
COH
glycerol.
fibers
interact
strongly
with
by
bonds.
improved
rigidity
films.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Апрель 6, 2025
This
study
investigated
the
use
of
cotton
linter
pulp
with
blending
cellulose
nanofibers
(CNFs)
to
produce
paper
improved
functional
attributes.
The
CNFs
were
added
in
varying
proportions
(0,
20,
40,
60,
80,
and
100%
on
a
dry
weight
basis).
handsheets
60
±
1
g/m2
prepared
evaluated
for
surface
morphology,
crystallinity,
mechanical,
barrier,
optical
properties.
Surface
morphology
revealed
high
compactness
incorporated
CNFs.
No
significant
changes
roughness
observed
upon
addition
Mechanical
properties
substantially
CNF
loading,
leading
notable
increase
tensile
strength
(3.6-9.4
fold),
tearing
resistance
(1.6-2.1
bursting
(1.1-4.2
fold)
folding
endurance
(6-184
compared
control
paper.
caused
marked
reduction
Cobb
value
(up
63.3%)
increased
air
34.3%),
demonstrating
barrier
showed
decrease
brightness
31.8%)
variable
opacity
trends
findings
suggested
linters
are
suitable
producing
high-quality
specialty
research
ascertained
potential
as
sustainable
green
material
enhance
mechanical
performance
products.
