Polymer Composites,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 24, 2025
Abstract
This
study
develops
and
characterizes
epoxy‐based
nanocomposites
reinforced
with
titanium
dioxide
(TiO₂)
carboxyl‐functionalized
multi‐walled
carbon
nanotubes
(MWCNT‐COOH)
to
improve
mechanical
durability
under
accelerated
aging.
Four
configurations:
neat
epoxy
(NE),
E+0.1C
(0.1
phr
MWCNT‐COOH),
E+2
T
(2
TiO₂),
+
2
(binary
nanocomposite)
were
fabricated
using
magnetic
stirring,
ultrasonication,
vacuum
degassing.
Samples
underwent
continuous
ultraviolet
(UV)
exposure
4‐h
moisture
cycles
following
8‐h
intervals.
Mechanical
tests,
including
Vickers
hardness
(H
V
)
micro‐scratch
evaluations,
performed
before
aging
after
132
264
h,
along
absorption
assessments.
Microstructural
chemical
analyses
energy
dispersive
X‐ray
(EDX)
Fourier
transform
infrared
(FTIR)
evaluated
nanofiller
dispersion
filler–matrix
interactions.
After
the
binary
nanocomposite
exhibited
a
0.78%
weight
increase
versus
0.89%
for
NE
maintained
approximately
9%
higher
H
at
differences
becoming
insignificant
by
h.
For
scratch
length
of
5
mm,
coefficient
friction
(CoF)
hours
stabilized
0.29
constant
loading
0.22
progressive
both
samples.
However,
samples
an
initial
spike
in
CoF,
which
was
not
observed
The
morphology
scratched
done
scanning
electron
microscope
(SEM)
supported
numerical
results.
Overall,
it
that
demonstrated
optimum
properties
lowest
prolonged
Highlights
TiO₂
MWCNT‐COOH
effects
on
surface
are
investigated.
Aging
is
UV
radiation
up
analysis
carried
out
this
study.
Binary‐modified
showed
optimal
Findings
support
use
extreme
environments
commercial
applications.
Environmental Quality Management,
Journal Year:
2025,
Volume and Issue:
34(3)
Published: Feb. 12, 2025
ABSTRACT
This
study
scrutinizes
the
photodegradation
efficacy
of
methylene
blue
(MB)
and
selected
phenolic
compounds,
emphasizing
variables
such
as
pH,
catalyst
dosage,
initial
pollutant
concentration.
Employing
a
GO/TiO₂/SiO₂
composite
(NC‐II)
composed
50:50%
TiO₂
SiO₂,
research
identifies
NC‐II
optimal
catalyst,
achieving
up
to
100%
degradation
MB
under
ideal
conditions
(0.5
ppm
concentration,
pH
10).
For
degradation,
maximal
rates
were
recorded
alkaline
(pH
8–10),
with
reaching
84.6%
at
10,
surpassing
46.5%
observed
for
NC‐I
37.7%
NC‐III
same
level.
Results
also
indicate
that
an
increase
in
dosage
0.3
g
enhances
rates,
63.7%
this
contrast
17.8%
53.1%
NC‐III.
In
case
efficiencies
varied
between
55%
86%,
demonstrating
highest
capability,
86%
Bisphenol
A
dosage.
The
4‐chlorophenol
phenol
was
more
pronounced
neutral
(5–6),
zero‐order
kinetics
producing
superior
regression
coefficients
(
R
2
=
0.91–0.99)
compared
pseudo‐first‐order
models.
Moreover,
maintained
over
80%
efficiency
across
five
reusability
cycles,
underscoring
its
durability
minimal
decline
performance.
substantiates
TiO₂:SiO₂
composites
cost‐effective,
high‐performance
catalysts
suitable
diverse
environmental
conditions,
where
adjustments
can
further
refine
different
types.
Polymer Composites,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 24, 2025
Abstract
This
study
develops
and
characterizes
epoxy‐based
nanocomposites
reinforced
with
titanium
dioxide
(TiO₂)
carboxyl‐functionalized
multi‐walled
carbon
nanotubes
(MWCNT‐COOH)
to
improve
mechanical
durability
under
accelerated
aging.
Four
configurations:
neat
epoxy
(NE),
E+0.1C
(0.1
phr
MWCNT‐COOH),
E+2
T
(2
TiO₂),
+
2
(binary
nanocomposite)
were
fabricated
using
magnetic
stirring,
ultrasonication,
vacuum
degassing.
Samples
underwent
continuous
ultraviolet
(UV)
exposure
4‐h
moisture
cycles
following
8‐h
intervals.
Mechanical
tests,
including
Vickers
hardness
(H
V
)
micro‐scratch
evaluations,
performed
before
aging
after
132
264
h,
along
absorption
assessments.
Microstructural
chemical
analyses
energy
dispersive
X‐ray
(EDX)
Fourier
transform
infrared
(FTIR)
evaluated
nanofiller
dispersion
filler–matrix
interactions.
After
the
binary
nanocomposite
exhibited
a
0.78%
weight
increase
versus
0.89%
for
NE
maintained
approximately
9%
higher
H
at
differences
becoming
insignificant
by
h.
For
scratch
length
of
5
mm,
coefficient
friction
(CoF)
hours
stabilized
0.29
constant
loading
0.22
progressive
both
samples.
However,
samples
an
initial
spike
in
CoF,
which
was
not
observed
The
morphology
scratched
done
scanning
electron
microscope
(SEM)
supported
numerical
results.
Overall,
it
that
demonstrated
optimum
properties
lowest
prolonged
Highlights
TiO₂
MWCNT‐COOH
effects
on
surface
are
investigated.
Aging
is
UV
radiation
up
analysis
carried
out
this
study.
Binary‐modified
showed
optimal
Findings
support
use
extreme
environments
commercial
applications.
