Facile Synthesis of Nickel Ferrite Decorated Carbon Nanotube/Cellulose Aerogel for Efficient Electromagnetic Wave Absorption
Small Methods,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 10, 2025
Abstract
The
continuous
advancement
of
electronic
devices,
driven
by
trends
toward
miniaturization,
reduced
weight,
higher
integration,
and
multifunctionality,
imposes
stringent
requirements
on
the
performance
electromagnetic
wave
(EMW)
absorbing
materials.
Traditional
EMW
absorbers,
such
as
metals,
face
significant
drawbacks,
including
high
density
rigidity,
which
limit
their
broader
application
in
absorption.
To
overcome
these
issues,
cellulose
is
employed
matrix,
incorporating
nickel
ferrite
(NiFe
2
O
4
)
nanocrystals
carbon
nanotubes
(CNTs)
functional
fillers.
ferrite/CNT/cellulose
aerogels
(NCCAs)
are
fabricated
through
ionic
crosslinking
room‐temperature
drying
techniques.
results
show
that
porous
structure
NCCA
enhances
multiple
scattering
energy
dissipation
pathways
for
EMWs,
while
CNTs
provide
excellent
electrical
dissipation.
content
NiFe
strongly
influences
aerogel's
saturation
magnetization
parameters
NCCAs,
primarily
owing
to
superior
dielectric
magnetic
loss
properties.
Notably,
when
4%
mass,
achieves
lowest
reflection
−66.53
dB
at
16.11
GHz,
lower
than
most
reported
ferrite‐based
absorbers.
This
work
provides
valuable
insights
guidance
design
novel
aerogel‐based
absorbers
with
lightweight
properties,
strong
absorption
intensities,
broad
frequency
bands.
Язык: Английский
Comparison of microwave absorption performance under solid and hollow structures of ferroferric oxide nanospheres
Journal of Physics and Chemistry of Solids,
Год журнала:
2025,
Номер
unknown, С. 112703 - 112703
Опубликована: Март 1, 2025
Язык: Английский
Construction of cactus-like BNNS@C composites with enhanced microwave absorption properties
Diamond and Related Materials,
Год журнала:
2025,
Номер
unknown, С. 112354 - 112354
Опубликована: Апрель 1, 2025
Язык: Английский
Molecular Brush‐Grafted Liquid Crystalline Hetero‐Structured Fillers for Boosting Thermal Conductivity of Polyimide Composite Films
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 24, 2025
Abstract
Hetero‐structured
thermally
conductive
fillers,
benefiting
from
the
low
interfacial
thermal
resistance
and
fillers’
synergistic
effect,
have
been
proven
to
be
ideal
choice
for
improving
conductivities
of
polymer
composites.
However,
hetero‐structured
fillers
are
usually
disorderly
distributed
in
matrix,
hindering
further
improvement
efficiency
constructing
conduction
pathways
This
work
proposes
a
new
strategy
graft
polymethyl
methacrylate
molecular
brushes
on
surfaces
fluorinated
graphene@carbon
nanotube
(FG@CNT)
by
atom
transfer
radical
polymerization.
FG@CNT
is
orderly
arranged
presents
liquid
crystalline
state
(LC‐(FG@CNT),
which
then
introduced
into
polyimide
(LC‐PI)
matrix
with
high
intrinsic
conductivity
fabricate
LC‐(FG@CNT)/LC‐PI
composite
films.
The
in‐plane
through‐plane
(
λ
∥
,
⊥
)
15
wt.%
films
reach
5.66
0.76
W·m
−1
·K
respectively,
168.2%
137.5%
higher
than
those
LC‐PI
=
2.11
0.32
),
also
significantly
FG@CNT/LC‐PI
4.72
0.74
).
Demonstrated
heat
dissipation
testing
finite
element
simulation,
show
excellent
management
capabilities
great
application
potential
generation
flexible
electronic
devices.
Язык: Английский
Multimechanism Decoupling for Low‐Frequency Microwave Absorption Hierarchical Fe‐Doped Co Magnetic Microchains
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 24, 2025
Abstract
The
rapid
development
of
military
and
civilian
electronic
communication
technology
poses
a
severe
challenge
to
controlling
electromagnetic
radiation
pollution
in
the
low‐frequency
microwave
band.
This
study
introduces
novel
one‐step
feeding
self‐assembly
ripening
strategy
synthesize
1D@2D
magnetic
microchains
(Co@Fe
x
Co
1‐
OOH,
CFC).
experimental
simulation
results
show
that
increasing
flux
length
ordered
orientation
is
very
important
improve
absorption
performance
1D
absorber.
CFC‐LC‐E
(long‐chain
CFC
aligned
along
electric
field
direction)
prepared
based
on
above
characteristics
successfully
achieves
high‐performance
effect,
with
minimum
reflection
loss
value
(
RLmin
)
−66.4
dB.
Notably,
it
maintains
stable
against
oblique
incidence
(within
90°)
polarizations
(transverse
transverse
magnetic).
work
offers
ideas
fabrication
absorbers
analysis
mechanisms.
Язык: Английский
Magnetic-dielectric balance in chain-like CoNi@C heterojunction with enhanced electromagnetic wave absorption
Composites Communications,
Год журнала:
2025,
Номер
unknown, С. 102424 - 102424
Опубликована: Апрель 1, 2025
Язык: Английский
Local Charge Regulation in Selenides via High‐Entropy Engineering to Boost Electromagnetic Wave Absorption
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 17, 2024
Abstract
Local
charge
modulation
is
an
effective
method
to
improve
the
polarization
loss
and
electromagnetic
(EM)
absorption
characteristics.
However,
use
of
conventional
means
(doping,
defects,
heterojunction
surfaces)
remains
singular
limited
in
achieving
local
modulation.
Surprisingly,
lattice
distortions
induced
by
high‐entropy
engineering
can
intrinsically
regulate
states
EM
wave
performances.
Herein,
a
series
selenides
with
enhanced
configuration
entropy
are
designed
prepared
capacity.
Due
different
radii
mixed
ions
Jahn‐Teller
distortion
effect,
effectively
modulated
presence
defects
strong
inside
lattice.
Uneven
distribution
at
formation
boundaries
promotes
defect‐induced
interface
polarization,
respectively.
Compared
single
NiSe
2
,
(NiFeCuCoMn)Se
value
1.53R
has
more
severe
suitable
impedance
matching
properties,
exhibiting
good
properties
both
intensity
respond
frequency.
Tailoring
density
via
strategy
paves
new
way
for
high‐performance
materials.
Язык: Английский