Polymer Composites,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 24, 2024
Abstract
With
the
advancement
of
technology,
demand
for
high‐performance
stealth
materials
with
complex
structures
has
increased
significantly.
This
study
explores
integration
design,
manufacturing,
and
evaluation
using
fused
deposition
modeling
(FDM)
combined
advanced
absorbing
materials.
Focusing
on
nylon‐based
filaments
optimized
broadband
absorption,
research
is
inspired
by
microstructure
weaver
ant's
back
shell
to
create
a
thin‐layer,
wideband
structure
wide‐angle
response,
employing
trust
region
algorithm.
high
dielectric
loss
materials,
bionic
FDM
technology
enhances
manufacturing
efficiency
reduces
structure's
thickness.
The
resulting
achieves
absorption
from
3.56
40
GHz,
excellent
angular
adaptability,
mechanical
robustness.
Compared
gradient
cell
structures,
it
thickness
33%
extends
frequency
range
5%.
approach
offers
lightweight,
solution
next‐generation
applications.
Highlights
Biomimetic
design‐manufacturing‐evaluation
integration.
Trust
domain
algorithm
optimization.
Improve
combining
macro
micro
Additive
cross‐enabled
functional
material
design.
Polymer Composites,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 14, 2025
Abstract
The
burgeoning
prevalence
of
electronic
devices
necessitates
effective
control
electromagnetic
interference
(EMI)
to
prevent
device
malfunctions
and
safeguard
environmental
human
health.
MXene,
with
its
unique
combination
high
electrical
conductivity
large
surface
area,
emerges
as
a
promising
candidate
for
EMI
shielding
applications.
This
study
investigates
the
influence
MXene
nanoparticle
concentration
coating
thickness
on
effectiveness
(EMI
SE)
epoxy‐MXene
nanocomposite
coatings.
Ti3C2
was
synthesized
incorporated
into
epoxy
matrices
at
varying
loadings
(3–30
wt.%)
fabricate
coatings
thicknesses
100
μm
1
mm.
Results
demonstrate
significant
enhancement
in
SE,
ranging
from
5
39
dB
X‐band
(7.5–13
GHz),
increasing
content.
Moreover,
mechanical
properties
matrix
were
observed
improve
addition
particularly
higher
concentrations.
Notably,
while
low
initially
resulted
slight
reduction
Young's
modulus,
subsequent
increases
content
led
substantial
enhancements
both
modulus
strength.
Dynamic
analysis
revealed
trend
towards
increased
elastic
behavior
reduced
energy
dissipation
highlights
potential
MXene‐based
composites
high‐performance
materials
tailored
properties.
Highlights
Successful
synthesis
confirmed
by
x‐ray
diffraction.
Enhanced
MXene‐epoxy
composites.
Thicker
improved
SE
A
T
.
Higher
generally
shielding.
MXene‐reinforced
offer
MXenes
have
gained
significant
attention
as
multifunctional
fillers
in
MXene-polymer
nanocomposites.
However,
their
inherently
hydrophilic
surfaces
pose
challenges
compatibility
with
hydrophobic
polymers
such
epoxy,
potentially
limiting
composite
performance.
In
this
study,
high-crystalline
Ti3C2Tx
were
functionalized
alkylated
3,4-dihydroxy-l-phenylalanine
ligands,
transforming
the
MXene
flakes
into
a
more
form,
thus
significantly
enhancing
epoxy
matrix.
This
surface
functionalization
enabled
uniform
dispersion
and
supported
formation
of
percolation
network
within
matrix
at
low
filler
loading
just
0.12
vol
%.
Consequently,
MXene-epoxy
nanocomposites
exhibited
remarkable
performance,
including
an
electrical
conductivity
8200
S
m-1,
outstanding
electromagnetic
interference
(EMI)
shielding
effectiveness
(SE)
100
dB
110
GHz
(61
8.2
GHz),
improved
thermal
1.37
W
m-1
K-1,
300%
increase
tensile
toughness
(271
KJ
m-3).
These
properties
substantially
outperformed
those
nonfunctionalized
counterparts
surpassed
previously
reported
study
underscores
critical
role
unlocking
full
potential
two-dimensional
(2D)
polymer
composites,
providing
pathway
to
advanced
nanocomposite
materials.
Polymer Composites,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 18, 2025
Abstract
Light
weight
carbon‐coated
nickel
(CCNi)/poly(ether‐ketone)
(PEK)
nanocomposites
reinforced
with
0–3.87
vol%
(or
5
wt%)
multiwalled
carbon
nanotubes
(MWCNTs)
have
been
fabricated
using
high
energy
ball
mill
followed
by
hot
pressing
and
evaluated
for
electromagnetic
interference
(EMI)
shielding
effectiveness
(SE)
in
the
X‐band
(8.2–12.4
GHz).
The
MWCNTs/CCNi/PEK
nanohybrids
show
electrical
conductivity
EMI‐SE
one
order
of
magnitude
85%
higher
than
those
without
MWCNTs,
respectively.
Experimentally,
it
is
found
that
absorption
major
mechanism
while
reflection
secondary.
Such
an
excellent
(i.e.,
29.5
dB)
value
obtained
at
a
very
low
density
(~
1.45
g/cm
3
)
makes
potential
candidates
defense,
space,
aerospace
applications.
Highlights
Lightweight
multifunctional
advanced
MWCNT/Ni@C/PEK
were
proposed.
Nanohybrids
containing
MWCNT
exhibited
MWCNT.
Combined
addition
Ni@C
into
PEK
yielded
synergetic
improvement
conductivity.
about
dB,
which
better
reported
literature.
