Decoupling enhancements of breakdown strength and dielectric constant in PMIA-based composite films for high-temperature capacitive energy storage
Composites Part B Engineering,
Год журнала:
2024,
Номер
unknown, С. 112013 - 112013
Опубликована: Ноя. 1, 2024
Язык: Английский
Closed loop recycling of electrically damaged meta-aramid papers with high electrical insulation and mechanical strength
Composites Science and Technology,
Год журнала:
2024,
Номер
254, С. 110688 - 110688
Опубликована: Май 29, 2024
Язык: Английский
Penguin feather-inspired flexible aerogel composite films featuring ultra-low thermal conductivity and dielectric constant
Materials Horizons,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Given
extremely
high
porosity,
aerogels
have
demonstrated
remarkable
advantages
in
serving
as
thermal
insulation
and
wave-transparent
materials.
Unfortunately,
their
practical
applications
are
greatly
confined
by
inherent
fragility.
The
recent
emergence
of
polymer
presents
an
ideal
platform
for
the
development
flexible
aerogel
films.
However,
additional
cross-linking
agents
necessitated
constructing
a
robust
structure,
complicating
production
process.
Herein,
we
report
film
based
on
meta-aramid
composites,
inspired
porous
structure
penguin
feathers.
intermolecular
hydrogen
bonds
function
natural
agents.
Their
disruption
results
dissolution
fibers,
while
reconstruction
facilitates
localized
rearrangement
chains
during
sol-gel
process,
generating
closed
nanopores.
Furthermore,
fluorinated
hollow
glass
microspheres
filled,
compressing
nanopores
situated
near
interface
to
75-150
nm.
This
meets
critical
threshold
required
Knudsen
effect,
decreasing
conductivity
levels
below
that
ambient
air.
At
optimized
doping
ratio
3
wt%,
is
21.6
mW
m-1
K-1,
achieving
low
dielectric
constant
1.43.
Simultaneously,
films
exhibit
enhanced
mechanical
properties,
also
show
benefits
hydrophobicity,
colorability,
ultralightness,
flame
retardancy,
making
themselves
multifunctional
materials
suitable
applications.
Язык: Английский
Polydopamine-Modified Boron Nitride Nanosheet/Polyimide Composites with Enhanced Thermal Conductivity and Electrical Insulation for High-Frequency Applications
ACS Applied Nano Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 2, 2025
Язык: Английский
Bioinspired Functional Composites for Enhanced Thermally Conductivity via Fractal-Growth CuNP Fillers
ACS Applied Bio Materials,
Год журнала:
2024,
Номер
7(9), С. 6297 - 6305
Опубликована: Сен. 2, 2024
Thermal
conduction
for
electronic
devices
has
attracted
extensive
attention
in
light
of
the
development
5G
communication.
Thermally
conductive
materials
with
high
thermal
conductivity
and
mechanical
flexibility
are
extremely
desirable
practical
applications.
However,
construction
efficient
interconnected
pathways
continuous
networks
is
inadequate
either
processing
or
actual
usage
existing
technologies.
In
this
work,
spherical
copper
nanoparticles
(S-CuNPs)
urchin-inspired
fractal-growth
CuNPs
(U-CuNPs),
thermally
metal
fillers
induced
by
ionic
liquids,
were
fabricated
successfully
through
electrochemical
deposition
method.
Compared
to
S-CuNPs,
U-CuNPs
shows
larger
specific
surface
contact
area,
thus
making
it
easier
build
a
pathway
network
corresponding
U-CuNPs/liquid
silicone
rubber
(LSR)
composites.
The
optimal
loading
CuNP
was
determined
evaluating
rheological
performance
prepolymer
properties
performances
When
filler
150
phr,
U-CuNPs/LSR
produces
(e.g.,
tensile
strength
modulus),
(above
1000%
improvement
compared
pure
LSR),
heating/cooling
efficiency.
enhanced
also
confirmed
finite
element
analysis
(FEA)
overall
temperature
distribution,
indicating
that
areas
exhibit
more
advantages
forming
composites
than
promising
competitive
alternative
traditional
flexible
interface
materials.
Язык: Английский
In-plane aligned doping pattern in electrospun PEI/MBene nanocomposites for high-temperature capacitive energy storage
Materials Horizons,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 28, 2024
To
achieve
superior
energy
storage
performance
in
dielectric
polymer
films,
it
is
crucial
to
balance
three
key
properties:
high
constant,
breakdown
strength,
and
low
loss.
Here,
we
present
the
realization
of
ultrahigh
efficiency
density
electrospun
MBene/PEI
composite
achieved
through
an
in-plane
aligned
doping
pattern.
The
1.0
wt%
film
exhibits
a
constant
10.7
at
1
kHz
while
maintaining
loss
below
0.0074.
Compared
random
pattern,
increases
by
25.9%,
suppressed
40.3%.
uniform
non-connected
dispersion
MBene
fillers
promotes
homogeneous
electric
field
distribution
minimizes
risk
developing
continuous
leakage
current
paths.
Therefore,
strength
remains
494
kV
mm-1.
Possessing
minimal
loss,
well-preserved
yields
8.03
J
cm-3
room
temperature,
achieves
5.32
150
°C,
with
exceeding
90%.
Additionally,
this
pattern
also
enhances
mechanical
properties.
This
work
provides
unique
solution
mitigate
side
effects
utilizing
conductive
fillers,
presenting
valuable
strategy
fabricate
films
for
high-performance
storage.
Язык: Английский
Research and Analysis on Enhancement of Surface Flashover Performance of Epoxy Resin Based on Dielectric Barrier Discharge Plasma Fluorination Modification
Nanomaterials,
Год журнала:
2024,
Номер
14(17), С. 1382 - 1382
Опубликована: Авг. 24, 2024
To
conquer
the
challenges
of
charge
accumulation
and
surface
flashover
in
epoxy
resin
under
direct
current
(DC)
electric
fields,
numerous
efforts
have
been
made
to
research
dielectric
barrier
discharge
(DBD)
plasma
treatments
using
CF4/Ar
as
medium
gas,
which
has
proven
effective
improving
voltage.
However,
despite
being
an
efficient
etching
medium,
SF6/Ar
remained
largely
unexplored.
In
this
work,
we
constructed
a
DBD
device
with
gas
explored
influence
processing
times
flow
rates
on
morphology
voltage
resin.
The
observed
by
SEM
indicates
that
degree
intensifies
time
rate,
quantitative
characterization
AFM
maximum
roughness
144
nm
after
3
min
treatment.
Flashover
test
results
show
at
2
time,
reached
19.02
kV/mm,
is
25.49%
higher
than
untreated
sample
previously
reported
works.
addition
effect
roughness,
trap
distribution
shows
fluorinated
groups
help
deepen
energy
levels
density.
optimal
modification
was
achieved
rate
3.5
slm
coupled
time.
Furthermore,
density
functional
theory
(DFT)
calculations
reveal
fluorination
introduces
additional
electron
traps
(0.29
eV)
hole
(0.38
eV),
enhancing
capture
carriers
suppressing
flashover.
Язык: Английский