Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Aug. 15, 2024
This
study
investigates
the
development
of
novel
nanocomposite
films
based
on
a
blend
polyethylene
oxide
(PEO)
and
polyvinyl
alcohol
(PVA)
loaded
with
varying
weight
percentages
copper
cobaltite
nanoparticles
(CuCo2O4
NPs).
The
primary
objective
was
to
fabricate
these
nanocomposites
using
solution
casting
technique
explore
influence
CuCo2O4
content
their
structural,
optical,
electrical,
dielectric
properties.
Spinel-type
NPs
were
synthesized
via
hydrothermal
method
incorporated
into
PEO/PVA
blend.
X-ray
diffraction
(XRD)
analysis
revealed
transformation
polymer
matrix
towards
an
amorphous
state
increasing
content.
UV–Vis
spectroscopy
studies
demonstrated
decrease
in
both
direct
indirect
band
gaps
nanocomposites,
suggesting
potential
applications
optoelectronic
devices.
Impedance
measurements
significant
enhancement
ionic
conductivity
(three
orders
magnitude
higher
than
pristine
blend)
for
film
containing
1.8
wt%
CuCo2O4.
real
permittivity
(ε′)
imaginary
(ε″)
exhibited
frequency
due
interplay
various
polarization
mechanisms.
Notably,
incorporating
led
remarkable
improvement
energy
density
compared
Additionally,
barrier
observed.
These
findings
demonstrate
successful
fabrication
PEO/PVA-CuCo2O4
enhanced
observed
improvements
suggest
promising
materials
storage
devices
potentially
like
light-emitting
diodes.
Results in Physics,
Journal Year:
2024,
Volume and Issue:
59, P. 107582 - 107582
Published: March 18, 2024
Polymer
nanocomposites
(PNCs)
composed
of
biopolymers
and
metallic
oxides
are
important
classes
materials.
In
addition
to
the
environmental
economic
considerations,
these
materials
became
best
candidates
for
various
industrial
fields.
current
study,
solution
cast
procedure
is
used
prepare
polymer
based
on
polyethylene
glycol
(PEG)/chitosan
(CS)
blend
varying
concentrations
tungsten
trioxide
nanoparticles
(WO3
NPs),
as
a
nanofiller.
TEM
micrograph
shows
that
WO3
NPs
have
particle
sizes
5–32
nm
their
shapes
cubic
spherical.
The
XRD
results
reveal
semicrystalline
PEG/CS
through
showing
three
distinct
diffraction
peaks
at
2θ
=
7.42°,
19.47°
23.62°
degree
crystallinity
decreased
after
incorporation
due
formation
polymer-nanoparticle
interactions
indicated
by
FTIR
spectra.
values
optical
energy
bandgap
(direct
indirect)
reduce
while
Urbach
increases
with
raising
concentration
in
matrix.
PEG/CS-WO3
films'
PL
spectra
show
photoemission
peak
about
387
nm,
where
this
loses
intensity
becomes
broader
induced
defects
increase
disordering
within
nanocomposite
films.
Additionally,
dielectric
investigation
an
constant,
loss,
AC
electrical
conductivity,
which
may
be
sign
charge
carriers
content
amorphous
regions
assists
movement
carriers.
DC
conductivity
conduction
mechanism
also
reported.
Argand
plot
half
semicircle
implying
Debye-type
relaxation
mechanism.
experimental
suggest
use
possible
contender
futuristic
storage
optoelectronic
applications.
Journal of Vinyl and Additive Technology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
Abstract
This
study
explores
the
development
of
biodegradable
nanocomposites
using
HPMC,
PVA,
and
CMC,
incorporated
with
copper
oxide
(CuO)
nanoparticles,
aiming
to
create
sustainable
packaging
materials
improved
antimicrobial
properties.
CuO
nanoparticles
were
synthesized
via
a
chemical
precipitation
method
integrated
into
polymer
blend
through
casting
technique.
X‐ray
diffraction
(XRD)
analysis
confirmed
monoclinic
crystal
structure
semi‐crystalline
nature
blends.
Fourier
transform
infrared
(FTIR)
spectroscopy
revealed
interactions
between
host
polymers
nanoparticles.
Optical
tests
showed
that
addition
reduced
both
direct
(E
gd
)
indirect
gi
energy
gaps.
Electrical
conductivity
measurements
indicated
an
increase
in
higher
concentrations,
attributed
enhanced
charge
carrier
mobility
crystallinity.
Contact
angle
decreased
hydrophobicity
as
concentration
increased,
suggesting
biocompatibility.
Cell
viability
on
HFB4
fibroblast
cells
demonstrated
significant
cell
viability,
highest
value
observed
at
5.0
wt%
CuO,
indicating
favorable
biocompatibility
for
biomedical
applications.
Moreover,
testing
inhibition
against
Gram‐positive
Gram‐negative
bacteria,
stronger
effect
strains.
These
results
highlight
potential
enhancing
properties
HPMC/PVA/CMC
blends,
offering
promising
applications
materials,
electronic
devices,
fields.
Highlights
Biodegradable
films
eco‐friendly
use.
optical
electrical
by
reducing
band
Enhanced
activity
bacteria.
Biocompatibility
confirmed,
showing
best
performance.
Developed
are
uses
packaging.
