Heliyon,
Год журнала:
2024,
Номер
10(9), С. e30429 - e30429
Опубликована: Апрель 30, 2024
•3D
printed
vent
structures
offer
EMI
shielding
and
thermal
cooling
via
air
circulation•Additive
manufacturing
combined
with
nanomaterials
shows
great
potential
in
shielding•High
aspect
ratio
silver
nanowires
make
continuous
conductive
grid
on
the
structures•With
2mm
height
honeycomb
cell
size,
structure
offers
up
to
35dB
attenuation
X-band•Intricate
honeycombs
attenuate
EM
waves
primarily
through
absorption
(up
70%)
In
light
of
rapid
advancements
within
electronic
industry,
urgent
need
for
development
implementation
advanced
electromagnetic
interference
(EMI)
materials
has
become
paramount.
Herein
a
novel
approach
is
presented
developing
lightweight
using
3D
printing
technology,
subsequent
spray
coating,
containing
Silver
Nanowires
(AgNWs),
achieve
effective
as
well
functionality
cooling.Using
polyol
method,
AgNWs
were
synthesized
having
high
crystallinity
be
used
coating
structures.
The
results
X-band
demonstrated
that
developed
exhibit
promising
properties,
35
dB
making
them
suitable
applications
requiring
protection
along
venting.
More
importantly
all
samples
major
contribution
efficiency
comes
from
75%)
inside
which
helpful
reduce
reflected
noise.Effort
was
effectively
addresses
inherent
limitations
conventional
processing
by
additive
material
science
create
applications,
bridging
gap
between
existing
desired
components.
cooling.
Using
noise.
Effort
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 21, 2024
Lignocellulose-mediated
liquid
metal
(LM)
composites,
as
emerging
functional
materials,
show
tremendous
potential
for
a
variety
of
applications.
The
abundant
hydroxyl,
carboxyl,
and
other
polar
groups
in
lignocellulose
facilitate
the
formation
strong
chemical
bonds
with
LM
surfaces,
enhancing
wettability
adhesion
improved
interface
compatibility.
Beyond
serving
supportive
matrix,
can
be
tailored
to
optimize
microstructure
adapting
them
diverse
This
review
comprehensively
summarizes
fundamental
principles
recent
advancements
lignocellulose-mediated
highlighting
advantages
composite
fabrication,
including
facile
synthesis,
versatile
interactions,
inherent
functionalities.
Key
modulation
strategies
LMs
innovative
synthesis
methods
functionalized
composites
are
discussed.
Furthermore,
roles
structure-performance
relationships
these
electromagnetic
shielding,
flexible
sensors,
energy
storage
devices
systematically
summarized.
Finally,
obstacles
prospective
pertaining
thoroughly
scrutinized
deliberated
upon.
is
expected
provide
basic
guidance
researchers
boost
popularity
applications
useful
references
design
state-of-the-art
LMs.
Abstract
Carbon
fiber
(CF)
is
a
potential
microwave
absorption
(MA)
material
due
to
the
strong
dielectric
loss.
Nevertheless,
owing
high
conductivity,
poor
impedance
matching
of
carbon‐based
materials
results
in
limited
MA
performance.
How
solve
this
problem
and
achieve
excellent
performance
remains
principal
challenge.
Herein,
taking
full
advantage
CF
bimetallic
metal–organic
frameworks
(MOF)
derivatives
layer,
an
absorber
based
on
micron‐scale
1D
NiCoMOF
(CF@NiCoMOF‐800)
developed.
After
adjusting
oxygen
vacancies
MOF,
resultant
presented
properties
including
minimum
reflection
loss
(RL
min
)
−80.63
dB
wide
effective
bandwidth
(EAB)
8.01
GHz
when
its
mass
percent
only
5
wt.%
thickness
2.59
mm.
Simultaneously,
mechanical
epoxy
resin
(EP)‐based
coating
with
are
effectively
improved.
The
hardness
(H),
elastic
modulus
(E),
bending
strength,
compressive
strength
CF@NiCoMOF‐800/EP
334
MPa,
5.56
GPa,
82.2
135.8
which
38%,
15%,
106%
53%
higher
than
EP
coating.
This
work
provides
promising
solution
for
carbon
achieving
properties.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(14), С. 17904 - 17917
Опубликована: Март 21, 2024
To
address
electromagnetic
interference
(EMI)
pollution
in
modern
society,
the
development
of
ultrathin,
high-performance,
and
highly
stable
EMI
shielding
materials
is
desired.
Liquid
metal
(LM)
based
conductive
have
received
enormous
amounts
attention.
However,
processing
approach
LM/polymer
composites
represents
great
challenges
due
to
high
surface
tension
cohesive
energy
LMs.
In
this
study,
we
develop
a
universal
one-step
fabrication
strategy
directly
process
containing
LMs
cellulose
nanofibrils
(CNFs)
successfully
fabricate
flexible,
films
with
an
average
specific
efficiency
(EMI
SE)
value
429
dB/mm
small
thickness
only
70
μm
wide
frequency
range
8.2–18
GHz.
addition,
resulting
also
exhibit
excellent
mechanical
performance
flexibility,
which
endow
film
ability
withstand
repeated
folding,
bending,
folding
into
complex
shapes
without
producing
cracks
or
fractures.
Besides,
display
thermal
conductivity
λ
4.90
W/(m
K)
α
3.17
mm2/s.
Thus,
presented
shows
potential
fabricating
advanced
for
applications.
Abstract
The
escalating
thermal
challenges
posed
by
increasing
power
densities
in
electronic
devices
emerge
as
a
critical
barrier
to
maintain
their
sustained
and
reliable
operation.
Addressing
this
issue
requires
the
strategic
development
of
materials
with
superior
conductivity
properties
facilitate
progress
high‐power
electronics
development.
Thermal
conductive
polymer
composites
incorporating
ceramic
material
renowned
for
exceptional
adjustability,
insulating
properties,
moldability,
are
emerging
promising
solution
urgent
challenge.
Hexagonal
boron
nitride
(h‐BN)
nanomaterials
highly
candidates
management
applications,
owing
mechanical
stability,
remarkable
coefficients,
minimal
expansion
characteristics,
outstanding
chemical
inertness.
In
work,
≈10
years
on
high
nitride‐filled
is
thoroughly
summarized.
Moreover,
strategies
h‐BN
other
nanomaterials‐filled
at
synthesis,
functionalization,
innovative
structural
design
discussed
detail.
main
future
nitride‐polymer
also
proposed,
which
will
provide
meaningful
guidance
practical
applications
materials.
Heliyon,
Год журнала:
2024,
Номер
10(11), С. e31697 - e31697
Опубликована: Май 22, 2024
A
complete
model
for
estimating
the
electric
conductivity
of
combustion
product
gases,
with
added
cesium
(Cs)
or
potassium
(K)
vapor
ionization,
is
presented.
Neutral
carrier
gases
serve
as
bulk
fluid
that
carries
seed
material,
well
electrons
generated
by
partial
thermal
(equilibrium)
ionization
alkali
metal.
The
accounts
electron-neutral
scattering,
electron-ion
and
electron-electron
scattering.
tested
through
comparison
published
data.
aimed
at
being
utilized
plasma
within
magnetohydrodynamic
(MHD)
channels,
where
direct
power
extraction
from
passing
electrically
conducting
gas
enables
generation.
then
used
to
estimate
seeded
under
three
selected
fuels,
namely:
hydrogen
(H2),
methane
(CH4),
carbon
(C).
For
each
these
two
options
oxidizer
were
applied,
air
(21
%
molecular
oxygen,
79
nitrogen
mole),
pure
oxygen
(oxy-combustion).
Two
types
seeds
(with
1
mole
fraction,
based
on
composition
before
ionization)
also
applied
six
combinations
(fuel-oxidizer),
leading
a
total
12
different
MHD
cases.
cases,
was
computed
range
temperatures
2000
K
3000
K.
smallest
estimated
0.35
S/m
oxy-hydrogen
K,
seeding.
largest
180.30
oxy-carbon
At
replacing
causes
gain
in
multiplicative
factor
about
3.6
regardless
fuel
oxidizer.
This
declines
between
1.77
2.07
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(36), С. 48386 - 48394
Опубликована: Авг. 29, 2024
Melioration
of
the
through-plane
thermal
conductivity
(TC)
interface
materials
(TIMs)
is
a
sore
need
for
efficient
heat
dissipation
to
handle
an
overheating
concern
high-power-density
electronics.
Herein,
we
constructed
snail
shell-like
conductive
framework
facilitate
vertical
conduction
in
TIMs.
With
inspiration
from
spirally
growing
calcium
carbonate
platelets
shells,
facile
double-microrod-assisted
curliness
method
was
developed
coil
boron
nitride
nanosheet
(BNNS)/aramid
nanofiber
(ANF)
laminates
where
interconnected
BNNSs
lie
along
horizontal
plane.
Thus,
alignment
resultant
TIM
achieved,
exhibiting
TC
enhancement
∼100%
compared
counterpart
with
randomly
distributed
at
same
BNNS
addition
(50
wt
%).
The
Foygel's
nonlinear
model
revealed
that
this
unique
reduced
interfacial
resistance
by
4
orders
magnitude.
Our
showed
superior
efficiency,
leading
temperature
reduction
42.6
°C
LED
chip
aforementioned
counterpart.
work
paves
valuable
way
fabricating
high-performance
TIMs
ensure
reliable
operation
electrical
devices.
