Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 30, 2024
Abstract
The
emerging
concept
of
aerogel
composite
phase
change
materials
(PCMs)
represents
a
promising
approach
for
thermal
energy
storage
and
utilization.
However,
the
aerogels
currently
reported
usually
lack
essential
properties,
thereby
constraining
their
potential
functional
design
advanced
applications.
Herein,
multifunctional
with
characteristics
thermoregulation
performance
are
prepared
by
chemically
crosslinking
unidirectional
freezing
to
make
functionalized
mineral‐based
PCMs
as
cavity
walls.
Thanks
cross–linked
continuous
skeleton
retained
hierarchical
porous,
this
novel
possesses
an
89.7%
porosity
demonstrates
excellent
resilience
under
80%
compression.
As
in
walls
can
convert
phonon
transport
modes
through
transitions,
has
enhanced
insulation
reaching
conductivity
29.6
mW
m
−1
K
.
Drawing
upon
properties
aerogels,
it
is
demonstrated
that
masks
comfort
health
protection,
well
passive
management
wrist
guards
capable
harnessing
solar
radiation
temperature
regulation.
This
work
encompasses
exploration
approaches
developing
cater
diverse
regulation
requirements
across
various
domains.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(17)
Published: Feb. 9, 2024
The
development
of
highly
thermally
conductive
composites
that
combine
visible
light/infrared
camouflage
and
information
encryption
has
been
endowed
with
great
significance
in
facilitating
the
application
5G
communication
technology
military
fields.
This
work
uses
aramid
nanofibers
(ANF)
as
matrix,
hetero-structured
silver
nanowires@boron
nitride
nanosheets
(AgNWs@BNNS)
prepared
by
situ
growth
fillers,
which
are
combined
to
fabricate
sandwich
structured
electrically
insulating
(BNNS/ANF)-(AgNWs@BNNS)-(BNNS/ANF)
(denoted
BAB)
composite
films
"filtration
self-assembly,
air
spraying,
hot-pressing"
method.
When
mass
ratio
AgNWs@BNNS
BNNS
is
1
:
total
fraction
50
wt
%,
BAB
film
maximum
in-plane
thermal
conductivity
coefficient
(λ
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: March 7, 2024
Abstract
Promoting
advanced
functional
films
that
integrate
protective
behaviors
for
synergetic
radar,
infrared
(IR),
and
visible
light
is
confronted
with
extreme
challenges.
The
effective
integration
of
shielding
capacity
IR
camouflage
into
single‐component
carbon
remains
an
enormous
challenge
because
limited
conductivity
high
absorption.
In
this
work,
nanotube
(CNT)
excellent
electromagnetic
interference
(EMI)
shielding,
switchable
camouflage,
energy
conversion
are
obtained
via
a
(FCCVD)
method
subsequent
defect
engineering
strategies
induced
by
temperature
(Strategy
I)
N/S
co‐doping
II).
Wherein
the
effect
on
electronic
configuration
as
well
multi‐spectra
performance
deeply
explored.
Ascribing
to
synergistic
effects
strategies,
defective
CNT
present
superior
EMI
effectiveness
(SE)
absorption
ratio
86.9%,
large
span
emissivity
(0.479),
which
provides
necessary
condition
various
application
scenarios.
Under
applied
electric
field
excitation,
radiation
can
adapt
rapidly
changing
surroundings,
such
low‐high/high‐low
temperatures.
Besides,
desirable
de‐icing
be
achieved.
This
work
supplies
feasible
strategy
designing
EM
absorption,
adaptive
confront
multiband
surveillance.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
16(1)
Published: Nov. 17, 2023
Abstract
Carbon-based
aerogels
derived
from
biomass
chitosan
are
encountering
a
flourishing
moment
in
electromagnetic
protection
on
account
of
lightweight,
controllable
fabrication
and
versatility.
Nevertheless,
developing
facile
construction
method
component
design
with
carbon-based
for
high-efficiency
wave
absorption
(EWA)
materials
broad
effective
bandwidth
(EAB)
strong
yet
hits
some
snags.
Herein,
the
nitrogen-doped
magnetic-dielectric-carbon
aerogel
was
obtained
via
ice
template
followed
by
carbonization
treatment,
homogeneous
abundant
nickel
(Ni)
manganese
oxide
(MnO)
particles
situ
grew
carbon
aerogels.
Thanks
to
optimization
impedance
matching
dielectric/magnetic
components
aerogels,
(Ni/MnO-CA)
suggests
praiseworthy
EWA
performance,
an
ultra-wide
EAB
7.36
GHz
minimum
reflection
loss
(RL
min
)
−
64.09
dB,
while
achieving
specific
253.32
dB
mm
−1
.
Furthermore,
reveals
excellent
radar
stealth,
infrared
thermal
management
capabilities.
Hence,
high-performance,
easy
fabricated
multifunctional
nickel/manganese
oxide/carbon
have
application
aspects
protection,
electronic
devices
aerospace.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(2)
Published: Oct. 3, 2023
Abstract
The
rapid
development
of
infrared
surveillance
technologies
has
attracted
great
attention
for
scientists
to
design
advanced
functional
materials
with
prominent
stealth
and
thermal
camouflage
effectiveness.
In
the
current
study,
a
sandwich‐like
composite
based
on
crosslinked
polyimide
aerogel,
meso‐erythritol
(mE)‐based
phase‐change
composite,
an
MXene
film
been
developed
achieve
long‐term
at
elevated
temperatures.
this
system,
lower
aerogel
layer
can
act
as
barrier
insulate
heat
transfer
through
its
layer‐stacking
structure
under
ultralow
directional
conduction.
introduction
middle
ensures
that
system
obtains
dynamical
temperature‐regulation
capability
sensible
latent
absorption
mE
phase
change
material,
while
upper
provides
very
low
emissivity
surface
system.
As
result,
achieves
significant
reduction
in
radiation
temperature
high‐temperature
target.
Moreover,
exhibits
good
electromagnetic
interference
shielding
effectiveness,
making
obtain
various
complicated
scenarios.
This
work
promising
approach
realize
targets
security
protection
counter‐surveillance.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(14), P. 9798 - 9822
Published: March 29, 2024
Extreme
climates
have
become
frequent
nowadays,
causing
increased
heat
stress
in
human
daily
life.
Personal
thermal
management
(PTM),
a
technology
that
controls
the
body's
microenvironment,
has
promising
strategy
to
address
stress.
While
effective
ordinary
environments,
traditional
high-performance
fibers,
such
as
ultrafine,
porous,
highly
thermally
conductive,
and
phase
change
materials,
fall
short
when
dealing
with
harsh
conditions
or
large
temperature
fluctuations.
Aerogels,
third-generation
superinsulation
material,
garnered
extensive
attention
among
researchers
for
their
applications
building
energy
conservation,
transportation,
aerospace,
attributed
extremely
low
densities
conductivity.
aerogels
historically
faced
challenges
related
weak
mechanical
strength
limited
secondary
processing
capacity,
recent
advancements
witnessed
notable
progress
development
of
wearable
PTM.
This
underscores
potential
within
serving
self-powered
smart
devices
sensors.
Review
offers
timely
overview
PTM
particular
focus
on
wearability
suitability.
Finally,
discussion
classifies
five
types
based
aerogel
function:
insulation,
heating,
cooling,
adaptive
regulation
(involving
cooling),
utilization
devices.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: June 17, 2024
Abstract
Lightweight
infrared
stealth
and
absorption-dominant
electromagnetic
interference
(EMI)
shielding
materials
are
highly
desirable
in
areas
of
aerospace,
weapons,
military
wearable
electronics.
Herein,
lightweight
high-efficiency
dual-functional
segregated
nanocomposite
foams
with
microcellular
structures
developed
for
integrated
EMI
via
the
efficient
scalable
supercritical
CO
2
(SC-CO
)
foaming
combined
hydrogen
bonding
assembly
compression
molding
strategy.
The
obtained
exhibit
superior
performances
benefitting
from
synergistic
effect
effective
thermal
insulation
low
emissivity,
outstanding
attributed
to
synchronous
construction
structures.
Particularly,
present
a
large
radiation
temperature
reduction
70.2
°C
at
object
100
°C,
significantly
improved
EM
wave
absorptivity/reflectivity
(
A
/
R
ratio
2.15
an
ultralow
Ti
3
C
T
x
content
1.7
vol%.
Moreover,
working
reliability
stability
upon
dynamic
cycles.
results
demonstrate
that
have
excellent
potentials
applications
Nano Letters,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 19, 2024
Modern
detection
technology
has
driven
camouflage
toward
multispectral
compatibility
and
dynamic
regulation.
However,
developing
such
stealth
technologies
is
challenging
due
to
different
frequency-band
principles.
Here,
this
work
proposes
a
design
concept
for
fluid-actuated
compatible
smart
device
that
employs
deformable
mechanochromic
layer/elastomer
with
channeled
dielectric
layer.
After
fluid
actuation,
the
elastomer
layer
transmits
mechanical
strain
layer,
thereby
altering
visible
reflectance
wavelengths
in
[568,
699]
nm.
Concurrently,
pumped-in
liquid
reconfigures
spatial
structure
parameter
alter
microwave
resonance
diffraction
radar
absorption,
enabling
absorption
significant
broadband
at
[8.16,
18.0]
GHz.
Using
heat-absorption
property
also
achieves
infrared
stealth,
shown
by
ΔT
≈
16.5
°C
temperature
difference.
Additionally,
exhibits
rapid
response
time
(∼1
s),
excellent
cycling
performance
(100
cycles),
programmability
(10
codes),
offering
new
strategy.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
17(1)
Published: Oct. 16, 2024
Developing
advanced
stealth
devices
to
cope
with
radar-infrared
(IR)
fusion
detection
and
diverse
application
scenarios
is
increasingly
demanded,
which
faces
significant
challenges
due
conflicting
microwave
IR
cloaking
mechanisms
functional
integration
limitations.
Here,
we
propose
a
multiscale
hierarchical
structure
design,
integrating
wrinkled
MXene
shielding
layer
flexible
Fe
