Polymer Composites,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 24, 2024
Abstract
Constructing
effective
conductive
networks
within
polymer
composites
has
proven
to
be
a
successful
strategy
for
fabricating
electromagnetic
interference
(EMI)
shielding
materials.
Herein,
we
present
novel
approach
creating
high‐temperature
EMI
materials
by
integrating
3D
printing
with
compression
molding.
First,
thermoplastic
polyurethane
(TPU)
framework
was
printed
using
fused
deposition
modeling
(FDM),
enabling
customization
of
the
composite's
conductivity.
This
subsequently
treated
solution
immersion
load
carbon
nanotubes
(CNTs)
onto
TPU
surface,
followed
molding
form
TPU/CNTs
segregated
network.
The
effects
coating
cycles
and
hot‐pressing
temperature
on
network
performance
were
systematically
studied.
results
revealed
that
hot
pressing
significantly
influences
development
At
130°C,
weak
formed
due
spatial
confinement
frame,
yielding
an
effectiveness
(SE
T
)
44
dB.
However,
at
190°C,
more
extensive
developed
as
CNTs‐rich
phase
overcomes
constrains,
achieving
impressive
SE
52
high‐performance
material,
coupled
its
simple
versatile
fabrication
process,
holds
promise
advanced
Highlights
Integrating
molding,
established
in
composites,
up
dB
X‐band
SE.
Hot‐pressing
plays
critical
role
constructing
networks.
A
130°C
confinement,
resulting
lower
value.
robust
network,
demonstrates
excellent
electrical
properties
low
R
0.22,
next‐gen
applications.
Polymers for Advanced Technologies,
Journal Year:
2025,
Volume and Issue:
36(2)
Published: Feb. 1, 2025
ABSTRACT
The
increasing
proliferation
of
electronic
devices
and
advanced
communication
networks
has
resulted
in
heightened
electromagnetic
interference
(EMI),
posing
significant
challenges
both
technological
environmental
contexts.
Traditional
EMI
shielding
materials,
such
as
metals
composite
coatings,
offer
limited
adaptability
are
unable
to
meet
the
dynamic
demands
modern
systems.
Recent
advancements
have
introduced
smart
stimuli‐responsive
materials
for
shielding,
which
provide
real‐time
tunability,
thereby
addressing
limitations
conventional
static
solutions.
These
leverage
various
mechanisms—such
compressive
tensile
strains,
phase
transitions,
shape
memory
effects,
responses
chemical
agents,
humidity,
or
crossover
angle
changes—to
dynamically
adjust
their
effectiveness
(EMI‐SE).
This
review
provides
an
in‐depth
analysis
recent
progress
technologies,
highlighting
tunable
mechanisms,
material
compositions,
applications.
Furthermore,
it
discusses
existing
potential
future
research
directions
required
advancement
this
technology.
By
enabling
environments,
present
a
promising
solution
telecommunications,
wearable
electronics,
aerospace,
defense
sectors.
Due
to
widespread
applications
of
electromagnetic
waves
(EMWs)
in
radar
and
communication
systems,
there
is
an
urgent
need
for
developing
EMW
absorbers
capable
working
efficiently
at
multiple
frequency
points.
In
this
work,
flexible
metamaterial
(MAs)
based
on
Fe3O4-doped
laser-induced
graphene
(LIG/Fe3O4)
are
large-scale
fabricated
with
the
absorption
bands
tunable
by
regulating
ferric
chloride
concentration
laser
path
LIG/Fe3O4
meta-surface.
The
as-prepared
triple
band
MA
demonstrates
superior
S11
values
-15.0
dB
(9.0
GHz),
-40.7
(12.2
-23.2
(16.8
respectively,
attributed
subwavelength
units
LIG/Fe3O4,
synergistically
combining
dielectric
magnetic
loss.
Moreover,
MAs
exhibit
commendable
corrosion
resistance
cross-section
reduction
characteristics,
showing
promising
potential
protection
fields.
