Developing
lightweight
polymer
shielding
membranes
with
additional
physicochemical
properties
is
of
great
significance
for
addressing
the
complex
contemporary
security
demands.
However,
precise
structural
design
at
molecular
level
remains
a
challenge.
Herein,
unique
Janus
composite
membrane
assembled
from
conductive
AgNWs/MXene
1D/2D
network
and
polyurethane
elastomer
(MPHEA),
displaying
combined
superior
electromagnetic
effectiveness
(EMSE)
up
to
80
dB
remarkable
infrared
stealth
capability
wide
temperature
range
room
50
°C.
Moreover,
endowed
chemical
crosslinking
in
resulted
exceptional
mechanical
strength,
self-healing,
adhesion.
The
maintained
(over
20
dB)
even
under
strain
40%
recovered
efficiency
90%
after
damage
self-healing
are
observed,
which
attributed
synergistic
3D
elastic
multi-dimensional
crosslinked
MPHEA@AgNWs/MXene
membrane.
This
work
has
represented
an
excellent
micro-nano
structure
strategy
on
multifunctional
wave
manager
application
scenario.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(29), С. 38620 - 38630
Опубликована: Июль 10, 2024
Polymers
are
often
used
as
adhesives
to
improve
the
mechanical
properties
of
flexible
electromagnetic
interference
(EMI)
shielding
layered
films,
but
introduction
these
insulating
inevitably
reduces
EMI
performance.
Herein,
ultrafine
aramid
nanofibers
(UANF)
with
a
diameter
only
2.44
nm
were
binder
effectively
infiltrate
and
minimize
gaps
in
MXene
for
balancing
properties.
Combining
evaporation-induced
scalable
assembly
assisted
by
blade
coating,
large-scale
MXene/UANF
films
highly
aligned
compact
stacking
successfully
fabricated.
Compared
conventional
ANF
larger
7.05
nm,
UANF-reinforced
film
exhibits
"brick-mortar"
structure
higher
orientation
compacter
nanosheets,
thus
showing
properties,
electrical
conductivity,
By
optimizing
content,
can
achieve
optimal
tensile
strength
156.9
MPa,
toughness
2.9
MJ
m
The
popularity
of
portable
and
wearable
flexible
electronic
devices,
coupled
with
the
rapid
advancements
in
military
field,
requires
electromagnetic
interference
(EMI)
shielding
materials
lightweight,
thin,
characteristics,
which
are
incomparable
for
traditional
EMI
materials.
film
can
fulfill
above
requirements,
making
them
among
most
promising
next-generation
devices.
Meticulously
controlling
structure
composite
while
optimizing
parameters
constructed
components
effectively
dissipate
transform
wave
energy.
Herein,
review
systematically
outlines
high-performance
films
through
structural
design
strategies,
including
homogeneous
structure,
layered
porous
structure.
attenuation
mechanism
evaluation
(Schelkunoff
theory
calculation
theory)
performance
introduced
detail.
Moreover,
effect
attributes
properties
on
is
analyzed,
summarizing
criteria
elucidating
relevant
mechanism.
Finally,
future
challenges
potential
application
prospects
prospected.
This
provides
crucial
guidance
construction
advanced
tailored
highly
customized
personalized
devices
future.
