ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(26), С. 33971 - 33980
Опубликована: Июнь 19, 2024
Flexible
electronics
toward
high
integration,
miniaturization,
and
multifunctionality,
leading
to
a
dramatic
increase
in
power
density.
However,
the
low
thermal
conductivity
of
flexible
substrates
impedes
efficient
heat
dissipation
device
performance
improvement.
In
this
work,
we
propose
template-assisted
chemical
conversion
strategy
for
obtaining
boron
nitride
nanotube
(BNNT)
films
with
great
flexibility.
Aligned
carbon
(CNT)
have
been
adopted
as
templates;
low-temperature
followed
by
high-temperature
annealing
has
carried
out
produce
highly
ordered
BNNT
film.
Benefiting
from
orientation
order,
film
exhibits
an
exceptional
45.5
W
m
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(17)
Опубликована: Фев. 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
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Дек. 5, 2023
Phase
change
materials
(PCMs)
offer
great
potential
for
realizing
zero-energy
thermal
management
due
to
superior
storage
and
stable
phase-change
temperatures.
However,
liquid
leakage
solid
rigidity
of
PCMs
are
long-standing
challenges
PCM-based
wearable
regulation.
Here,
we
report
a
facile
cost-effective
chemical
cross-linking
strategy
develop
ultraflexible
polymer-based
phase
composites
with
dual
3D
crosslinked
network
olefin
block
copolymers
(OBC)
styrene-ethylene-butylene-styrene
(SEBS)
in
paraffin
wax
(PW).
The
C-C
bond-enhanced
OBC-SEBS
networks
synergistically
improve
the
mechanical,
thermal,
leakage-proof
properties
PW@OBC-SEBS.
Notably,
proposed
peroxide-initiated
method
overcomes
limitations
conventional
physical
blending
methods
thus
can
be
applicable
across
diverse
polymer
matrices.
We
further
demonstrate
portable
flexible
PW@OBC-SEBS
module
that
maintains
comfortable
temperature
range
39-42
°C
personal
thermotherapy.
Our
work
provides
promising
route
fabricate
scalable
composite
management.
Light Science & Applications,
Год журнала:
2023,
Номер
12(1)
Опубликована: Окт. 4, 2023
Abstract
Advanced
multispectral
detection
technologies
have
emerged
as
a
significant
threat
to
objects,
necessitating
the
use
of
multiband
camouflage.
However,
achieving
effective
camouflage
and
thermal
management
across
entire
infrared
spectrum,
especially
short-wave
(SWIR)
band,
remains
challenging.
This
paper
proposes
multilayer
wavelength-selective
emitter
that
achieves
including
near-infrared
(NIR),
SWIR,
mid-wave
(MWIR),
long-wave
(LWIR)
bands,
well
visible
(VIS)
band.
Furthermore,
enables
radiative
heat
dissipation
in
two
non-atmospheric
windows
(2.5–3
μm
5–8
μm).
The
emitter’s
properties
are
characterized
by
low
emittance
0.270/0.042/0.218
SWIR/MWIR/LWIR
reflectance
0.129/0.281
VIS/NIR
bands.
Moreover,
high
0.742/0.473
ensures
efficient
dissipation,
which
results
temperature
decrement
14.4
°C
compared
Cr
reference
at
2000
W
m
−2
input
power
density.
work
highlights
role
solar
radiance
camouflage,
provides
comprehensive
guideline
for
developing
compatible
with
from
LWIR.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Март 18, 2024
Abstract
Radiative
cooling
(RC)
is
a
carbon‐neutral
technology
that
utilizes
thermal
radiation
to
dissipate
heat
from
the
Earth's
surface
cold
outer
space.
Research
in
field
of
RC
has
garnered
increasing
interest
both
academia
and
industry
due
its
potential
drive
sustainable
economic
environmental
benefits
human
society
by
reducing
energy
consumption
greenhouse
gas
emissions
conventional
systems.
Materials
innovation
key
fully
exploit
RC.
This
review
aims
elucidate
materials
development
with
focus
on
design
strategy
including
their
intrinsic
properties,
structural
formations,
performance
improvement.
The
main
types
materials,
i.e.,
static‐homogeneous,
static‐composite,
dynamic,
multifunctional
are
systematically
overviewed.
Future
trends,
possible
challenges,
solutions
presented
perspectives
concluding
part,
aiming
provide
roadmap
for
future
advanced
materials.
Nano-Micro Letters,
Год журнала:
2023,
Номер
15(1)
Опубликована: Июль 13, 2023
Abstract
Epidermal
electronics
with
superb
passive-cooling
capabilities
are
of
great
value
for
both
daytime
outdoor
dressing
comfort
and
low-carbon
economy.
Herein,
a
multifunctional
skin-attachable
electronic
is
rationally
developed
on
porous
all-elastomer
metafabric
efficient
passive
radiative
cooling
(PDRC)
human
electrophysiological
monitoring.
The
characteristics
realized
through
the
homogeneous
impregnation
polytetrafluoroethylene
microparticles
in
styrene–ethylene–butylene–styrene
fibers,
rational
regulation
microporosity
SEBS/PTFE
metafabrics,
thus
synergistically
backscatter
ultraviolet–visible–near-infrared
light
(maximum
reflectance
over
98.0%)
to
minimize
heat
absorption
while
efficiently
emit
human-body
midinfrared
radiation
sky.
As
result,
PDRC
achieves
approximately
17
°C
effects
an
environment
completely
retains
its
performance
even
under
50%
stretching.
Further,
high-fidelity
monitoring
capability
also
implemented
breathable
skin-conformal
liquid
metal
printing,
enabling
accurate
acquisition
electrocardiograph,
surface
electromyogram,
electroencephalograph
signals
comfortable
lengthy
health
regulation.
Hence,
fabricated
superelastic
opens
new
avenue
development
body-comfortable
wearing
technologies.
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Март 1, 2024
Abstract
Radiative
cooling
technology
is
well
known
for
its
subambient
temperature
performance
under
sunlight
radiation.
However,
the
intrinsic
maximum
power
of
radiative
limits
when
objects
meet
thermal
shock.
Here,
a
dual‐function
strategy
composed
and
latent
heat
storage
simultaneously
enabling
efficient
high‐efficiency
thermal‐shock
resistance
proposed.
The
electrospinning
absorption‐pressing
methods
are
used
to
assemble
cooler.
high
reflectivity
mid‐infrared
emissivity
film
allow
excellent
5.1
°C.
When
subjected
shock,
cooler
demonstrates
pinning
effect
huge
drop
39
°C
stable
low‐temperature
level
by
isothermal
absorption
compared
with
traditional
molten
phase
change
materials
provide
heat‐time
transfer
converting
delayed
preservation.
This
paves
powerful
way
protect
from
accumulation
high‐temperature
damage,
expanding
applications
technologies.
ACS Nano,
Год журнала:
2024,
Номер
18(3), С. 2312 - 2324
Опубликована: Янв. 8, 2024
Stable
outdoor
wearable
electronics
are
gaining
attention
due
to
challenges
in
sustaining
consistent
device
performance
outdoors,
where
sunlight
exposure
and
user
movement
can
disrupt
operations.
Currently,
researchers
have
focused
on
integrating
radiative
coolers
into
devices
for
thermal
management.
However,
these
approaches
often
rely
heat-vulnerable
thermoplastic
polymers
strain-susceptible
conductors
that
unsuitable
electronics.
Here,
we
introduce
mechanically,
electrically,
thermally
stable
even
when
they
stretched
under
address
challenges.
This
achievement
is
realized
by
a
polydimethylsiloxane
nanofibrous
cooler
liquid
metal
fully
device.
The
robust
architecture
of
nanofibers,
based
their
inherent
properties
as
thermoset
polymers,
exhibits
excellent
cooling
through
high
solar
reflection
emission.
Additionally,
laser-patterned
possess
ideal
electronics,
including
strain-insensitivity,
nonsmearing
behavior,
negligible
contact
resistance.
As
proof,
developed
integrated
with
electromechanically
components
accurately
detect
physiological
signals
harsh
environments,
light
exposure,
while
up
30%.
work
highlights
the
potential
development
everyday
capable
reliable
operation
challenging
external
conditions,
user-activity-induced
stress
exposure.
