ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 19, 2024
Multifunctional
materials
integrated
with
electromagnetic
wave
absorption
(EWA),
thermal
insulation,
and
lightweight
properties
are
urgently
indispensable
for
the
flourishing
advancement
of
space
technology,
which
can
simultaneously
prevent
detection
resist
aerodynamic
heating.
To
achieve
excellent
synergistic
EWA
insulation
performance,
elaborate
regulate
microstructure
dimension
nanomaterials
has
emerged
as
a
captivating
research
direction.
However,
comprehending
structure-property
relationships
between
microstructure,
response,
mechanisms
remains
significant
challenge.
Herein,
comprehensive
perspective
focuses
on
design
encompassing
various
dimensions
nanomaterials,
providing
understanding
correlations
among
structure,
EWA,
insulation.
First,
cutting-edge
elaborated,
followed
by
relationship
nanomaterials.
Moreover,
methods
explored.
Lastly,
this
review
summarizes
corresponding
shortcomings
issues
current
EWA-integrated
proposes
breakthrough
directions
creation
superior
performance.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 12, 2024
Abstract
Freeze
casting
is
a
solidification
technique
utilized
in
the
fabrication
of
porous
materials.
However,
freeze
process
quite
complex,
and
significant
challenges
remain
precisely
controlling
pore
size
shape
structures.
This
study
aims
to
investigate
customization
multifunctional
electromagnetic
wave
(EMW)
absorbers
with
3D
structures
via
casting.
review
initially
presents
fundamental
principles
underlying
examines
correlation
between
internal
external
factors
during
preparation
porosity.
The
emerging
trends
constructing
novel
intricate
macroscopic
through
are
subsequently
outlined.
Furthermore,
this
focuses
on
composites
various
microstructures
low‐dimensional
building
blocks,
their
EMW
response
properties.
By
regulating
influencing
mechanisms
casting,
absorption
materials
exhibit
outstanding
advantages
such
as
property
manipulation,
controllable
structure,
high
porosity,
specific
surface
area,
lightweight,
flexibility.
These
features
broaden
applications
shielding,
mechanical
property,
radar
stealth,
thermal
insulation
fire
prevention,
flexible
sensors,
antifreeze
ability,
etc.
In
addition,
we
discuss
prospects
high‐performance
using
techniques.
ACS Nano,
Год журнала:
2024,
Номер
18(52), С. 35465 - 35479
Опубликована: Дек. 16, 2024
Polymer
aerogels,
with
their
porous
and
lightweight
features,
excel
in
applications
such
as
energy
storage,
absorption,
thermal
insulation,
making
them
a
sought-after
new
material.
However,
the
covalent
cross-linking
networks
of
current
polymer
aerogels
result
unsustainable
manufacturing
processing
practices,
persistently
depleting
our
finite
natural
resources
causing
significant
global
environmental
impacts.
Herein,
we
have
constructed
high-performance
dynamic
aerogel
network
using
biobased
materials,
its
structure
green
sustainability
akin
to
those
plants
nature.
Abundant
reversible
points
endow
ultrafast
degradation
capabilities,
enabling
allow
for
closed-loop
chemical
monomer
recovery
reprocessing.
Furthermore,
utilizing
highly
active
network,
net-zero
emission
material
reuse
reprocessing
can
be
achieved.
Additionally,
controlled
features
multilevel
roughness
nanostructured
surface
similar
lotus
leaf
biomimetic
pore
structure,
contributing
anisotropy.
The
distinctive
composition
high
compressive
strength
(2.2
MPa)
vertically,
low
conductivity
(0.0257
W/(m·K))
horizontally,
outstanding
fire
resistance
(LOI
is
36%).
Notably,
demonstrates
highest
hydrophobicity
among
polyimine
contact
angle
154°.
excellent
performance
variety
potential
oil–water
separation,
directional
transport,
phase
change
it
anticipated
that
these
will
greatly
benefit
from
systematic
upgrades
recyclability
Abstract
With
the
advent
of
5G
era,
there
has
been
a
marked
increase
in
research
interest
concerning
electromagnetic
wave‐absorbing
materials.
A
critical
challenge
remains
improving
properties
these
materials
while
satisfying
diverse
application
demands.
MXenes,
identified
as
prominent
“emerging”
2D
for
wave
absorption,
offer
unique
advantages
that
are
expected
to
drive
advancements
and
innovations
this
field.
This
review
emphasizes
synthesis
benefits
provided
by
structural
characteristics
MXenes
performance
enhancements
achieved
through
their
combination
with
other
absorbing
Material
requirements,
approaches,
conceptual
frameworks
integrated
underscore
advantages.
The
study
provides
thorough
analysis
MXene‐absorbing
composites,
going
beyond
basic
classification
address
preparation
modification
processes
affecting
absorption
composites.
Attention
is
directed
techniques,
design
principles,
influence
on
composite
performance.
Additionally,
potential
applications
devices
summarized.
concludes
addressing
challenges
currently
confronting
MXene
outlining
developmental
trends,
aiming
guidance
subsequent
domain.
Advanced Sustainable Systems,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 28, 2024
Abstract
Thermal
management
involves
precisely
controlling
temperatures
in
systems,
devices,
or
electronic
products
to
ensure
optimal
performance,
stability,
enhanced
efficiency,
and
lifespan,
which
include
high
thermal
conductivity,
superthermal
insulation,
active
passive
heating.
Carbon
nanotubes
(CNTs),
known
for
their
low
density,
mechanical
strength,
superior
electrical
conductivities,
represent
ideal
materials
lightweight,
high‐strength
applications,
showcasing
extensive
benefits
potential
intelligent
management.
This
review
explores
the
use
of
CNTs
improving
photothermal
conversion,
heating,
underscoring
unique
advantages
broad
application
prospects
smart
systems.
Specifically,
article
outlines
CNT
elevating
enhancing
insulation
characteristics,
increasing
energy
conversion
rates,
offering
vital
scientific
technical
guidance
creating
innovative,
next‐generation
materials.
By
systematically
analyzing
forecasting,
this
provides
strategic
direction
research
development
high‐performance
materials,
heralding
significant
role
future
studies.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 17, 2025
Abstract
Aerogel
and
its
phase
change
composites
are
two
reliable
strategies
for
thermal
management.
However,
the
inherent
instability
of
these
porous
structures
hinders
their
further
development
application.
Herein,
a
robust
boron
nitride
metamaterial
(BNM)
enhanced
by
negative
Poisson's
ratio
effect
is
proposed
dual
management
obtained
sacrificial
template
method.
The
confers
structural
stability
to
BNMs.
On
one
hand,
BNM
exhibits
resilience
(5%
residual
strain
after
100
cycles),
temperature
invariance,
fire
resistance,
superinsulation
at
high
temperatures
(102.83
mW·m
−1
·K
1000
°C).
other
overcomes
deformation
during
vacuum
impregnation
process
obtain
isotropic
composites,
achieving
efficient
conductivity
(1
W·m
with
4
vol%
BNM)
enhancement
97%.
These
effectively
encapsulate
materials,
preventing
liquefaction
leakage.
This
approach
offers
solution
simultaneously
improving
both
strategies.
The
rational
design
of
the
aerogel
pore
structure
facilitates
maximum
excitation
materials
physicochemical
properties,
which
enables
modulation
their
electromagnetic
performance.
However,
controllable
adjustment
remains
a
significant
challenge.
Here,
freeze-thawing
process
and
thermal
annealing
treatment
are
introduced
to
prepare
reduced
graphene
oxide
(rGO)/iron
(Fe)/carbon
nanocoil
(CNC)
aerogels.
composite
aerogels
with
tunable
obtained
by
adjusting
content
CNC.
Both
experiments
simulations
confirm
that
addition
CNC
presents
continuous
3D
conductive
network,
improves
conductivity
loss
polarization
loss.
Meanwhile,
amorphous
carbon
within
causes
structural
defects,
further
enhance
Therefore,
rGO/Fe/CNC
optimized
has
lightweight
efficient
wave
absorption.
At
an
ultra-low
filling
ratio
0.8
wt%,
effective
absorption
bandwidth
reaches
7.9
GHz
optimal
reflection
is
-43.5
dB.
In
addition,
due
network
interwoven
temperature
stability
nanomaterials,
have
excellent
insulation,
antifreeze
performance,
hydrophobicity.
This
multifunctional
absorber
great
potential
for
application
in
complex
changing
environments.
