Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 11, 2025
Abstract
Hearing
loss
is
among
the
most
prevalent
sensory
impairments
globally.
aids
assist
individuals
with
hearing
in
perceiving
sound
more
effectively,
serving
as
essential
tools
for
reconnecting
them
world.
Herein,
an
MXene/Polyvinyl
Alcohol
sensor
(MPSS)
capable
of
recognizing
weak
signals
developed.
It
can
not
only
recognize
different
speech
and
properties
but
also
show
good
stability
process
long‐term
recording.
In
addition,
by
combining
machine
learning,
accuracy
rate
voiceprint
recognition
wildlife
conservation
up
to
99%,
underscoring
its
practical
significance
protection.
Utilizing
piezoresistive
effects,
a
aid
detection
threshold
60
dB
frequency
range
20–4000
Hz
achieved,
which
provides
feasible
scheme
aids.
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.
In
the
6G
era,
miniaturized
and
highly
integrated
wearable
communications
devices
require
electromagnetic
materials
with
efficient
thermal-management
capability
to
mitigate
interference
(EMI)
heat
accumulation.
Herein,
we
present
a
facile
strategy
for
conducting
by
constructing
directional
thermal-conduction
nanochannels
within
layer-by-layer
EMI
shielding
film.
This
composite
film
consists
of
polyacrylonitrile/boron
nitride
nanosheets@polydopamine
nanofibers
covered
an
layer
based
on
MXene
sheets.
Compared
traditional
in
which
dissipates
randomly,
one-dimensional
fibrous
structure
can
offer
dissipation
pathway.
Under
high-power
microwave
irradiation,
it
exhibits
significantly
lower
temperatures,
ensuring
robust
durable
communication
performance
without
overheating.
The
thin
(0.43
mm
thickness)
achieves
impressive
specific
surface
efficiency
29,400
dB·cm2·g-1
at
18-24
GHz,
effectiveness
(SE)
88
dB
its
counterpart.
addition,
flexible
maintains
high
SE
after
10,000
bending
times.
Its
lightweight,
flexible,
design
makes
suitable
applications
various
environments.
thermally
conductive
provides
rapid
effective
signal
systems,
showcasing
great
potential
thermal
management
next-generation
technologies.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 4, 2025
Abstract
Intelligent
electromagnetic
interference
(EMI)
shielding
materials,
with
their
tunable
EM
wave
response
characteristics,
have
attracted
much
attention.
However,
the
molecular‐level
mechanism
is
under‐explored
and
tuning
range
narrow.
This
study
proposes
an
EMI
switch
hydrogel
based
on
molecular
precision
manipulation
of
a
thermoresistive
network
capable
adaptively
regulating
performance.
It
has
two
temperature‐controlled
switching
states:
on/off
strong/weak
shielding.
The
consists
interpenetrating
polyvinyl
alcohol
(PVA)
poly(N‐isopropylacrylamide)
(PNIPAM)
networks,
giving
it
thermal
shrinkable
properties.
A
temperature‐induced
high
contact
resistance
MXene‐carbon
nanotubes
(MXene‐CNTs)
conductive
assembled
within
it.
combination
enables
to
switchable
performance
in
X‐band,
9.3–53.9
dB
at
different
temperatures
or
thicknesses.
remarkable
results
from
synergistic
effect
temperature‐driven
shrinkage
matrix
network,
involving
adjustments
particle
stacking,
conductivity,
transmission
path.
MXenes
offer
remote‐controlled
photothermal‐responsive
Significantly,
hydrogel's
self‐healing
properties
allow
endure
damage
its
can
be
quickly
restored.
work
paves
new
way
for
rational
design
adaptive
devices
level.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 11, 2025
Abstract
Hearing
loss
is
among
the
most
prevalent
sensory
impairments
globally.
aids
assist
individuals
with
hearing
in
perceiving
sound
more
effectively,
serving
as
essential
tools
for
reconnecting
them
world.
Herein,
an
MXene/Polyvinyl
Alcohol
sensor
(MPSS)
capable
of
recognizing
weak
signals
developed.
It
can
not
only
recognize
different
speech
and
properties
but
also
show
good
stability
process
long‐term
recording.
In
addition,
by
combining
machine
learning,
accuracy
rate
voiceprint
recognition
wildlife
conservation
up
to
99%,
underscoring
its
practical
significance
protection.
Utilizing
piezoresistive
effects,
a
aid
detection
threshold
60
dB
frequency
range
20–4000
Hz
achieved,
which
provides
feasible
scheme
aids.
