Asymmetric Structural Design for Absorption‐Dominated Electromagnetic Interference Shielding Composites
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 28, 2025
Abstract
Excessive
electromagnetic
pollution
caused
by
waves
can
interfere
with
the
normal
use
of
electronic
devices
or
cause
unnecessary
damage
to
human
health.
Although
conductive
polymer
composites
(CPCs)
are
used
replace
traditional
metals
as
an
effective
strategy
for
managing
undesirable
waves,
CPCs
have
a
non‐negligible
trade‐off
in
enhancement
interference
(EMI)
shielding
effectiveness
and
absorption
coefficient
because
their
reflection‐dominated
EMI
mechanism.
Therefore,
alleviate
secondary
pollution,
absorption‐dominated
asymmetric
structures
urgently
needed.
Recently,
structural
designs
advanced
significantly,
but
seldom
been
summarized
discussed
detail.
Consequently,
this
review
first
systematically
summarizes
current
progress
after
brief
clarification
about
necessity
configuration
structure
design.
Afterward,
various
fiber,
layered,
porous,
composite
described.
Besides,
versatility
is
briefly
introduced.
Finally,
challenges
prospects
proposed
guide
future
advancement
field.
Язык: Английский
Thin, Lightweight, and Highly Efficient Electromagnetic Interference Shielding Nanocomposites Composed of a π-Conjugated Block Copolymer Nanowire/Multiwalled Carbon Nanotube Bicontinuous Interpenetrating Network
ACS Omega,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 3, 2025
We
developed
high-performance
electromagnetic
interference
(EMI)
shielding
composites
by
integrating
a
π-conjugated
block
polymer
system
with
carbon
nanofillers.
First,
poly(3-hexylthiophene)-poly(ε-caprolactone)
(P3HT-PCL)
copolymer
was
synthesized
through
combination
of
Grignard
metathesis,
tail
modifications,
and
ring-opening
polymerization.
Controlling
the
solvent
type
aging
time
resulted
in
self-assembly
P3HT-PCL
chains
into
nanoscale
fibers.
When
multiwalled
nanotubes
(MWCNTs)
were
added
to
solution,
π-π
interactions
between
thiophene
rings
benzene
units
MWCNTs
facilitated
dispersal
hybrid
solution.
Self-assembled
prompted
formation
nanofibrillar
framework,
which
beneficial
stabilize
overall
structural
distribution
system,
thereby
synergistically
forming
P3HT-PCL/MWCNT
composite
bicontinuous
interpenetrating
network.
The
conductive
skeleton
formed
effective
connections
one-dimensional
geometric
made
this
highly
an
excellent
EMI
material.
Moreover,
introduction
PCL
helped
overcome
problems
related
rigid
nature
P3HT,
facilitating
manufacture
thin,
lightweight,
sheets.
film
0.05
mm
thick
provided
optimized
effectiveness
up
29.4
dB,
effectively
blocking
nearly
99.89%
incident
waves.
results
research
provide
innovative
promising
direction
for
development
advanced
materials.
Язык: Английский
Low-value biomass-derived carbon composites for electromagnetic wave absorption and shielding: A review
New Carbon Materials,
Год журнала:
2025,
Номер
40(2), С. 293 - 316
Опубликована: Апрель 1, 2025
Язык: Английский
Ultrathin MWCNT/Ti3C2Tx Hybrid Films for Electromagnetic Interference Shielding
Nanomaterials,
Год журнала:
2024,
Номер
15(1), С. 6 - 6
Опубликована: Дек. 25, 2024
The
disordered
assembly
and
low
conductivity
of
carbon
nanotubes
are
the
main
problems
that
limit
application
electromagnetic
interference
(EMI)
shielding.
In
this
work,
an
ordered
lamellar
structure
multiwalled
nanotube/Ti3C2Tx
(MWCNT/Ti3C2Tx)
hybrid
films
was
achieved
by
vacuum-assisted
filtration
through
hybridization
Ti3C2Tx
nanosheets
nanotubes,
where
were
tightly
sticking
on
surface
via
physical
adsorption
hydrogen
bonding.
Compared
with
pure
films,
MWCNT/Ti3C2Tx
a
significant
improvement
in
452.5
S/cm
EMI
shielding
effectiveness
(SE)
44.3
dB
under
50
wt%
thickness
(8.6
μm)
orderly
stacking
structure,
which
finally
resulted
high
specific
SE
(SSE/t,
divided
density
thickness)
55,603.1
dB∙cm2∙g−1.
Язык: Английский