Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
28, С. 3414 - 3421
Опубликована: Дек. 27, 2023
This
study
involved
the
preparation
of
novel
samples
polypyrrole-doped
carbon/polyvinyl
alcohol/lithium
titanate
nanocomposites,
PPY-C/PVA/LiO,
with
a
tuning
LiO
concentration
using
casting
technique
to
be
applicable
in
different
applications.
Various
analytical
procedures
were
employed
examine
their
optical,
morphological,
structural,
and
electrical
properties.
It
was
decided
that
PPY-C/PVA
is
an
amorphous
structure
became
crystalline
when
NPs
added.
happened
because
functional
groups
interacted
each
other.
confirmed
by
appearing
new
characteristic
diffraction
peaks
vibrational
stretching
peak
at
588
cm−1
metal-O
bond
deducing
uniform
distribution
blend
matrix
increase
number
white
dots,
it
served
as
evidence
impact
surface
roughness
on
properties
nanocomposite.
Also,
studies
conductivity
showed
goes
up,
AC
conductivity,
dielectric
constant,
loss
all
go
down.
more
nanofiller
added,
immobile
ions
form
clumped
areas,
dipole
polarization
adding
polymeric
makes
matrix's
chains
less
flexible,
which
raises
crystallinity
ratio.
The
obtained
results
suggest
these
nanocomposite
films
are
promising
candidates
can
used
fabrication
or
nano-electronic
devices.
Polymer Testing,
Год журнала:
2023,
Номер
129, С. 108258 - 108258
Опубликована: Окт. 31, 2023
Silver
nanoparticles
(Ag
NPs)
were
synthesized
using
Capsicum
annuum
extract,
which
is
a
cost-effective
and
green
technique.
At
the
same
time,
selenium
(Se
prepared
by
sol-gel
Then,
series
of
PVA/SA
blend
samples
filled
with
different
contents
Ag–Se
via
solution
casting
way.
The
nanocomposite
films
investigated
measurements.
XRD
scans
nanocomposites
displayed
decrease
in
crystallinity
increasing
content
NPs
as
nanofillers
matrix.
FT-IR
spectra
indicated
complexation
positive
interactions
between
NPs.
thermal
stability
polymeric
was
improved
after
addition
nanofiller
(Ag–Se
NPs),
shown
TGA
scans.
Moreover,
indirect/direct
optical
energy
gap
decreased
from
3.96/5.28
to
2.73/3.59
eV
concentrations
NPs,
confirming
improvement
properties
samples,
UV/visible
spectra.
Dielectric
studies
revealed
that
filling
increases
defects
leads
greater
number
dipoles
within
and,
thus,
an
increase
dielectric
constant
loss
samples.
antibacterial
test
showed
all
had
broad
activity
against
Gram-positive
Gram-negative
bacteria
compared
pure
it
linearly
related
Improvements
thermal,
optical,
electrical
make
present
suitable
for
multiple
functions
many
applications,
such
high-density
storage
flexible
electronic
devices.
In
contrast,
enhancement
could
indicate
these
can
also
be
used
packaging
biomedical
purposes.
Arabian Journal of Chemistry,
Год журнала:
2023,
Номер
16(10), С. 105171 - 105171
Опубликована: Июль 20, 2023
Polymer-based
energy
storage
has
recently
attracted
the
attention
of
researchers.
Herein,
sol-gel
prepared
zinc
oxide
nanoparticles
(ZnO
NPs),
as
nanofiller
up
to
5
wt.%
filling
levels
and
a
host
polymeric
blend
matrix
polyvinyl
chloride
(PVC)
poly
(N-vinyl
carbazole)
(PVK)
were
taken
synthesize
nanocomposite
films
via
solution
casting.
The
ratio
PVC:
PVK
was
90:10
wt.%.
X-ray
diffraction
(XRD)
results
indicated
that
films'
crystallinity
decreased
ZnO
NPs
content
increased;
it
from
54.23
22.14
%.
scanning
electron
microscope
(SEM)
micrographs
revealed
good
miscibility
PVC/PVK
homogeneous
distribution
within
matrix.
thermal
stability
nanocomposites
studied
through
TGA
technique,
activation
calculated
using
Coats-Redfern
method.
In
optical
results,
absorption
spectra
gap
for
allowed
direct
transition
reduced
under
adding
NPs;
3.61
eV
pure
2.96
film
with
AC
conductivity
experiments
electrical/dielectric
properties
get
enhanced
by
increasing
content.
Following
incorporation
NPs,
electrical
(σac),
dc
(σdc),
dielectric
constant
(ε′),
loss
(ε′′)
values
PVC/PVK/ZnO
improved;
σdc
increased
6.46×10-16
S/cm
3.63×10-13
Additionally,
both
ε′
ε′′
while
These
findings
could
suggest
be
promise
applications
polymer-based
capacitors.
