Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: May 31, 2024
Abstract
This
work
presents
a
facile
approach
for
controlling
the
optical
and
electrical
parameters
of
biopolymeric
matrix
optoelectronics.
Vanadium
oxide
(V
2
O
5
)
chromium
(Cr
3
nanoparticles
(NPs)
were
prepared
incorporated
into
carboxymethylcellulose/polyethylene
glycol
(CMC/PEG)
blend
by
simple
chemical
techniques.
Transmission
electron
microscopy
(HR-TEM),
X-ray
diffraction
(XRD)
data
showed
that
V
Cr
exhibited
spherical
shapes
with
sizes
in
range
40–50
nm
10–20
nm,
respectively.
In
addition,
blend's
degree
crystallinity
was
sensitive
to
doping
ratios.
The
scanning
(FE-SEM)
elemental
analysis
(EDAX)
used
study
filler
distribution
inside
blend,
confirmed
existence
both
matrix.
Fourier
transform
infrared
(FTIR)
spectroscopy
dopants
significantly
affected
reactive
(C–O–C,
OH,
C=O)
groups.
stress–strain
curves
illustrated
reinforcing
effect
up
1.0
$$\text{wt\%}$$
wt\%
/V.
transmittance
absorption
index
spectra
visible-IR
wavelengths
decreased
increasing
content.
Utilizing
Tauc's
relation
(optical)
dielectric
loss,
direct
(indirect)
band
gap
narrowed
from
5.6
(4.5)
eV
4.7
(3.05)
at
All
films
have
an
refraction
1.93–2.17.
AC
conductivity
improved
content
temperature.
energy
density
50
°C
is
1–3
J/m
.
influence
on
conductivity,
constant,
modulus
CMC/PEG
reported.
These
enhancements
properties,
along
potential
engineering,
offer
promising
prospects
advanced
applications
optoelectronics
energy-related
fields.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 31, 2025
ABSTRACT
This
work
reports
the
influence
of
bio‐derived
silver
(Ag)
nanoparticles
insertion
on
properties
polyvinyl
alcohol/carboxymethyl
cellulose
(PVA/CMC)
polymer
blend
prepared
by
solution
casting
method.
X‐ray
diffraction
studies
reveal
dispersion
into
matrices.
Thermal
DSC
and
TGA
indicate
increased
thermal
stability
due
to
addition
nanoparticles.
Three
different
steps
weight
loss
shown
dTGA
curves
water
adsorbed,
elimination
side
chains,
decomposition
main
chain.
The
maximum
degradation
pure
sample
occurred
at
a
peak
temperature
around
252°C
with
65%
degradation,
whereas
doped
samples
322°C
26%
which
evidences
sample.
UV–visible
spectral
analysis
shows
decrease
in
both
direct
indirect
band
gap
values
increasing
dopant
concentration
host,
is
an
indication
formation
complexes
between
filler.
antifungal
PVA/CMC/Ag
films
are
evaluated
against
four
distinct
fungus
strains.
findings
that
activity
index
amount
Ag
filled
in.
According
study,
doping
PVA/CMC
increases
its
antimicrobial
efficacy.
Since
these
nanocomposites
have
electrical
conductivity
properties,
they
may
be
suggested
for
future
investigation
biomedical
applications,
including
wound
dressing
infection
prevention.
Polymer-Plastics Technology and Materials,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 32
Published: Dec. 30, 2024
Polyvinyl
alcohol
(PVA)
is
a
synthetic
biopolymer
widely
recognized
for
its
biodegradability,
biocompatibility,
and
excellent
film-forming
properties.
Recent
advancements
in
PVA-based
materials
have
expanded
use
diverse
fields,
including
packaging,
biomedicine,
wastewater
treatment.
This
review
offers
comprehensive
analysis
of
the
latest
innovations
PVA
applications,
emphasizing
their
role
as
sustainable
material,
particularly
through
development
nanocomposites.
The
addition
nanoparticles,
cross-linking
agents,
combinations
has
significantly
enhanced
mechanical
strength,
antibacterial
properties,
UV-blocking
capacity
PVA,
making
it
well-suited
advanced
packaging
biomedical
applications.
Cross-linking
improves
water
resistance
durability
while
combining
with
biopolymers
such
starch
chitosan
enhances
biodegradability.
highlights
structural,
mechanical,
optical,
electrical
properties
Open Physics,
Journal Year:
2024,
Volume and Issue:
22(1)
Published: Jan. 1, 2024
Abstract
Improving
coating
technology
and
thin
film
formation
by
optimizing
the
experimental
parameters
has
become
essential
for
various
industrial
technological
fields.
This
work
aims
to
study
influence
of
precursor
materials
on
physical
electro-optical
properties
Cr
2
O
3
films.
The
solutions
were
prepared
using
sol–gel
route
deposited
glass
slides
spin
technique.
structure
morphology
films
studied
XRD,
FT-infrared
(IR),
field-emission
scan-electron
microscope.
results
indicated
a
high-purity
(Eskolaite)
phase
in
form
spherical
nanoparticles
with
sizes
17–25
nm.
Three
bands
appear
at
490,
765,
889
cm−1
{{\rm{cm}}}^{-1}
FTIR
spectra,
which
are
attributed
mathvariant="normal">Cr
mathvariant="normal">–
mathvariant="normal">O
{\rm{Cr}}{\rm{\mbox{--}}}{\rm{O}}
/
mathvariant="normal">═
{\rm{Cr}}{\rm{═}}{\rm{O}}
vibrations.
I
–
V
curves
showed
linear
behavior
good
ohmic
features.
Ultraviolet-visible-near
infrared
spectra
that
highly
transparent,
band
gaps
range
2.60–2.90
eV,
refractive
indices
1.92–2.25.
sheet
resistances,
new
figure
merit,
real
fictional
dielectric
constants,
optical
conductivity
discussed.
best
candidates
utilizations,
including
solar
cells,
sensors
IR
region,
energy
storage.
