Single-walled
carbon
nanotubes
(SWNTs),
renowned
for
their
high
strength
and
electromagnetic
properties,
provide
a
potential
solution
next-generation
honeycomb-structured
radar-absorbing
materials
(HRAMs).
However,
the
integration
of
SWNTs
into
HRAMs
is
hindered
by
challenges
including
poor
dispersion,
wash-off
loss,
absence
scalable,
compatible
fabrication
methods.
Herein,
we
address
these
synthesizing
tunable
conductive
SWNT-coated
aramid
fibers
(SWNT-AF)
via
continuous
dip-coating
method
integrating
them
paper-based
composites
(APBC)
to
fabricate
HRAMs.
The
SWNT-AF
serve
as
both
structural
reinforcements
dielectric
loss
centers
within
APBC,
avoiding
direct
dispersion
pulp
thereby
mitigating
agglomeration
loss.
optimized
reinforced
with
tailored
fibers,
exhibit
improved
resulting
in
enhanced
microwave
absorption
performance.
fabricated
achieve
an
effective
bandwidth
14.8
GHz
(2.0-18.0
GHz)
ultralow
SWNT
loading
0.2
wt
%
thin
thickness
only
30
mm,
demonstrating
reflection
-47.78
dB.
These
results
highlight
lightweight,
broadband
stealth
applications.
Abstract
The
irreconcilable
camouflage
mechanisms
of
radar
and
infrared
spectroscopy
present
substantial
challenges
to
integrating
multi‐physics
field
cloaking
technology.
Although
aerogels
possess
both
microwave
dissipation
thermal
insulation,
higher
emissivity
restrict
further
amelioration
in
compatible
stealth
field.
Herein,
we
propose
a
bilayer
configuration
comprised
aramid
nanofiber
(ANF)
aerogel
shielding
meta‐surface
(ISM).
top
ISM
with
low‐pass
filtering
capabilities
is
engineered
regulate
while
remaining
transparent
microwaves.
While
the
bottom
quaternary
ANF
insulation
are
synthesized
by
multi‐scale
design
strategy
heterogeneous
surface
engineering.
Through
theoretical
experimental
optimization,
assembled
composite
achieves
near‐perfect
absorption
X‐band,
synergy
low
facilitates
concealment
windows.
Specifically,
minimum
reflection
loss
(RL)
reaches
−32.44
dB,
effective
bandwidth
(EAB)
expands
3.69
GHz
(8.71–12.40
GHz),
integration
value
(
ΔH
)
increases
9.92
dB
mm
−1
.
Additionally,
conductivity
(0.0288
W
(m
K)
average
(0.23
3–5
µm
0.25
8–14
µm)
can
reduce
radiation
energy
68.1%.
This
research
provides
new
thought
for
multispectral
demonstrates
enormous
potential
technologies.
