Journal of Physics D Applied Physics,
Год журнала:
2023,
Номер
57(3), С. 035301 - 035301
Опубликована: Окт. 13, 2023
Abstract
The
fabrication
of
polymer
nanocomposites
with
specialized
traits
is
gaining
popularity
across
the
world
due
to
novel
added
qualities.
In
this
work
we
used
a
flash
auto-combustion
method
prepare
Mn
0.5
Fe
1.5
Mg
Ni
O
4
nanoparticles
and
casting
/PVA
nanocomposite
films
doping
various
from
1–5
wt.%.
effect
addition
on
structural,
optical,
dielectric
characteristics
was
analyzed.
structural
properties
were
studied
using
x-ray
diffraction
pattern,
high
resolution
transmission
electron
microscope,
Fourier
transform
infrared,
field
emission
scanning
microscope.
effects
ac
conductivity,
electric
modulus,
impedance,
constant
investigated.
It
shows
that
have
higher
values
permittivity
conductivity
than
PVA
exhibit
lower
loss,
impedance.
optical
showed
indirect
decreased
4.8
4.4
eV.
According
experimental
results,
these
show
promise
for
laser
CUT-OFF
filters
energy
storage
devices.
Polymer Engineering and Science,
Год журнала:
2023,
Номер
63(11), С. 3684 - 3697
Опубликована: Авг. 28, 2023
Abstract
In
the
present
work,
sol–gel‐synthesized
titanium
oxide
nanoparticles
(TiO
2
NPs)
were
added
to
polyvinyl
chloride
(PVC)
and
polymethyl
methacrylate
(PMMA)
create
polymer
nanocomposites
(PNCs)
samples.
The
preparation
was
carried
out
via
solution
casting
method.
synthesized
TiO
NPs
have
a
tetragonal
anatase
phase
an
average
grain
size
of
15.7
nm.
XRD
analysis
reveals
that
NPs'
addition
PVC/PMMA
causes
decrease
in
crystallinity
PNCs
films.
Infrared
Fourier
demonstrated
interplay/complexity
between
blend
NPs.
UV/visible
spectrum
showed
two
absorbance
peaks
at
278
208
nm,
which
may
result
from
n
→
π*
π
transitions.
Also,
optical
bandgaps
for
indirect
direct
allowed
transitions
decreased
with
increasing
concentration.
samples'
AC
electrical
conductivity
dielectric
properties
measured
room
temperature.
As
content
nanocomposite
rises,
percolating
network
begins
emerge
inside
composite,
demonstrating
obeys
Jonscher's
law.
Additionally,
it
has
been
nanoparticle
concentration
leads
higher
composite
loss
constant.
These
findings
suggest
possibility
using
prepared
capacitive
energy
storage
optoelectronic
devices.
Highlights
PVC/PMMA‐TiO
nanocomposites'
films
fabricated
Adding
reduces
rising
content.
conductivity,
impedance,
characteristics
discussed.
indicate
use
samples
Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
24, С. 8241 - 8251
Опубликована: Май 1, 2023
Herein,
nanocomposite
polymer
electrolyte
films
were
prepared
from
the
blend
of
two
polymers,
polyethylene
oxide
(PEO)
and
carboxymethyl
cellulose
(CMC),
stuffed
with
various
contents
gold
quantum
dots
(AuQDs)
copper
nanoparticles
(CuNPs)
as
hybrid
nanofiller
via
solution
casting
method.
AuQDs
using
laser
ablation
in
liquid
(LAL).
TEM
images
showed
that
average
size
is
nearly
6.21
nm
a
spherical
shape.
The
effects
nano-filler
(AuQDs
CuNPs)
on
PEO/CMC
structural,
optical,
electrical/dielectric
characteristics
have
been
investigated
discussed.
XRD
results
revealed
crystallinity
degree
samples
decreased
increasing
AuQDs/CuNPs
content.
Also,
UV–Vis
spectroscopy
analysis
uncovered
optical
energy
gap
reduced
nanofillers'
content
increased.
At
room
temperature,
electrical
impedance
(EIS)
measurements
loading
increases
films'
conductivity.
In
dielectric
properties,
space
charges
polarization
higher
values,
where
constant
(ε′)
increased
at
lower
frequency
regions.
Nyquist
diagram
semicircular
shape
frequencies
part
linear
decreasing
radius;
equivalent
circuit
models
could
be
best
fit.
These
suggest
these
candidates
for
capacitors
flexible
storage
devices.
Polymers,
Год журнала:
2023,
Номер
15(10), С. 2391 - 2391
Опубликована: Май 20, 2023
The
solution
casting
technique
is
utilized
to
fabricate
blank
and
CuO-doped
polyvinyl
alcohol/chitosan
(PVA/CS)
blends
for
eco-friendly
applications.
structure
surface
morphologies
of
prepared
samples
were
explored
by
Fourier
transform
infrared
(FT-IR)
spectrophotometry
scanning
electron
microscopy
(SEM),
respectively.
FT-IR
analysis
reveals
the
incorporation
CuO
particles
within
PVA/CS
structure.
SEM
exposes
well-dispersion
in
host
medium.
linear/nonlinear
optical
characteristics
found
on
basis
UV-visible-NIR
measurements.
transmittance
decreases
upon
increasing
20.0
wt%.
bandgap
(Eg
dir./Eg
ind.)
from
5.38/4.67
eV
(blank
PVA/CS)
3.72/3.12
(20.0
wt%
CuO-PVA/CS).
An
obvious
improvement
constants
blend
achieved
doping.
Wemple-DiDomenico
(WDD)
Sellmeier
oscillator
models
examine
role
dispersion
behavior
blend.
shows
clear
enrichment
parameters
host.
novel
findings
current
study
nominate
films
applications
devices.
Polymer Engineering and Science,
Год журнала:
2024,
Номер
64(9), С. 4321 - 4331
Опубликована: Июнь 24, 2024
Abstract
In
the
current
work,
a
blend
matrix
that
combines
polyvinyl
alcohol
and
pyrrolidone
(PVA/PVP)
was
reinforced
by
titanium
dioxide
(TiO
2
)
nanoparticles
via
casting
technique.
The
FTIR
spectra
XRD
examinations
of
nanocomposites
offer
insight
into
structural
changes
have
taken
place
with
inclusion
TiO
in
matrix.
elements
were
detected
EDX
detector
linked
to
scanning
electron
microscope
(SEM).
transmission
absorption
PVA/PVP‐TiO
evaluated
UV–visible
spectrophotometer.
Tauc's
model
demarcated
optical
bandgap
(E
g
),
which
declined
from
4.91
eV
for
pure
4.66
PVA/PVP—0.75
wt.%TiO
film.
refractive
index
increases
1.903
6.646
PVA/PVA/0.75
wt%TiO
,
respectively.
nonlinear
features
(as
predicted
Wemple‐DiDomenico
model)
are
enriched.
proliferation
significantly
increased
third‐order
susceptibility
χ
(3)
1.87
×
10
−14
5.091
−13
PVA/PVP‐0.75
wt.%
attributed
oscillation
surface
plasmons
NPs.
thermal
stability
films
inspected.
Doping
enhanced
its
stability.
‐filled
PVA/PVP
demonstrate
hopeful
various
requests
can
be
utilized
optoelectronics
devices
due
their
tunable
parameters
Highlights
Thermal
loading
PVA/PVP–TiO
studied.
Extinction
coefficient
Proliferation
.
