Polymer Composites,
Journal Year:
2024,
Volume and Issue:
45(15), P. 13706 - 13720
Published: June 27, 2024
Abstract
Boron
nitride
(hBN)
serves
as
an
outstanding
high‐performance
polymer
organic
filler.
However,
its
hexagonal
crystal
structure
renders
it
chemically
inert,
thus
limiting
applications.
This
study
proposes
the
modification
of
hBN
using
economical
amine
and
anhydride
curing
agents
to
reduce
aggregation
enhance
heat
conduction
epoxy
resin.
Specifically,
DETA
agent
methyl
tetrahydrophthalic
(MTHPA)
were
grafted
onto
surface
via
ball
milling
eco‐friendly
water
scrubbing
processes.
Subsequently,
modified
functionalized
BNNS
uniformly
dispersed
in
resin
a
wet
process
form
composite
materials.
Results
indicate
that
both
fillers
maintain
good
dispersion
at
interface.
Compared
resin,
EP/MTHPA‐BNNS
material
with
10
vol%
loading
increased
by
212%.
The
EP/DETA‐BNNS
exhibited
relative
thermal
conductivity
enhancement
191%.
Moreover,
materials
demonstrated
significantly
improved
stability,
slightly
reduced
breakdown
strength.
Mechanical
property
testing
revealed
maximum
increase
187.5%
fracture
elongation.
Highlights
Comprehensive
on
High
after
Modified
improves
interface
properties
increases
twice
under
wt%
Composite
electrical
insulation
high
elongation
Journal of Applied Polymer Science,
Journal Year:
2024,
Volume and Issue:
141(41)
Published: Aug. 6, 2024
Abstract
High
dielectric
constant
(
ε
),
thermal
conductivity
(TC),
and
breakdown
strength
E
b
)
along
with
low
loss
flexible
polymeric
nanocomposites
display
multifunctional
applications.
In
this
work,
to
synergistically
bolster
the
TC
while
restraining
leakage
current
in
percolating
flaky
copper
f
‐Cu)/poly(vinylidene
fluoride)
(PVDF),
presenting
a
giant
,
core@shell
structured
‐Cu@MgO
(magnesium
oxide)
nanosheets
were
first
created
via
chemical
precipitation
method,
then
incorporated
into
host
PVDF
explore
MgO
shell’
impact
on
properties
of
resulting
nanocomposites.
The
introduced
interlayer
strengthens
interfacial
interactions
significantly
mitigates
mismatch
both
between
‐Cu
PVDF,
elevated
‐Cu@MgO/PVDF
comparison
pristine
‐Cu/PVDF.
Furthermore,
insulating
introduces
deep
traps
inhibits
long‐distance
migration
electrons,
leading
remarkably
suppressed
loss.
More
importantly,
can
be
optimized
by
tuning
thickness.
fitting
results
Havriliak‐Negami
equation
theoretically
support
shell's
suppression
effect
charge
reveal
underlying
polarization
mechanism
developed
currently
high
but
loss,
present
promising
applications
electrical
power
systems.
