Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(25), С. 11030 - 11043
Опубликована: Июнь 11, 2024
Polymer-based
shielding
materials
have
garnered
attention
due
to
their
lightweightness,
ease
of
fabrication,
and
tailorable
performance.
However,
they
tend
creep
deform
when
the
are
exposed
external
heat,
which
may
cause
a
catastrophic
disaster
mechanical
failure.
In
this
study,
hybrid
loading
graphite
(Gt)
boron
nitride
(BN)
fillers
was
used
improve
thermal
dissipation,
neutron
shielding,
tribological
properties
ultrahigh
molecular
weight
polyethylene
(UHMWPE),
demonstrate
potential
applications
in
nuclear
sectors
among
others.
The
results
revealed
that
conductivity
UHMWPE/BN
30
wt
%/Gt
40
%
composite
(i.e.,
BN30Gt40)
reached
as
high
8.43
W/mK,
295%
higher
than
%,
201%
UHMWPE/Gt
1700%
pure
UHMWPE,
respectively.
Simulation
analysis
using
Geant4
suggested
UHMWPE/BN/Gt
composites
exhibited
excellent
neutron-shielding
performance
presence
abundant
hydrogen
elements.
addition,
demonstrated
friction
wear
combined
effects
constructing
transfer
film
on
surface
pair
timely
removal
frictional
heat
generated
at
sliding
interface.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(5), С. 5009 - 5018
Опубликована: Фев. 24, 2024
Polyimide
(PI)
with
excellent
comprehensive
properties
has
been
extensively
applied
in
electronic
devices.
The
miniaturization
and
integration
of
electrical
equipment
put
forward
more
stringent
requirements
for
heat
dissipation,
so
a
composite
high
thermal
conductivity
low
dielectric
become
critical
factor.
In
this
work,
fluorinated
graphene
(FG)
boron
nitride
nanosheets
modified
polydopamine
(PDA@BNNS)
were
filled
into
the
PI
matrix
as
fillers
to
prepare
FG/PDA@BNNS/PI
composites.
mixed
filling
FG
BNNS
synergistically
improves
conductivity,
research
breaks
balance
barrier
between
conductivity.
resulting
4.99
wt
%
exhibited
properties,
including
ultralow
constant
1.67,
loss
0.013
at
1
MHz,
2.464
W
m–1
K–1.
addition,
film
also
showed
standout
breakdown
resistance
(81.22
kV/mm)
mechanical
such
that
tensile
strength
reached
35.7
MPa.
This
report
can
inspire
future
development
composites
packaging.
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(25), С. 11030 - 11043
Опубликована: Июнь 11, 2024
Polymer-based
shielding
materials
have
garnered
attention
due
to
their
lightweightness,
ease
of
fabrication,
and
tailorable
performance.
However,
they
tend
creep
deform
when
the
are
exposed
external
heat,
which
may
cause
a
catastrophic
disaster
mechanical
failure.
In
this
study,
hybrid
loading
graphite
(Gt)
boron
nitride
(BN)
fillers
was
used
improve
thermal
dissipation,
neutron
shielding,
tribological
properties
ultrahigh
molecular
weight
polyethylene
(UHMWPE),
demonstrate
potential
applications
in
nuclear
sectors
among
others.
The
results
revealed
that
conductivity
UHMWPE/BN
30
wt
%/Gt
40
%
composite
(i.e.,
BN30Gt40)
reached
as
high
8.43
W/mK,
295%
higher
than
%,
201%
UHMWPE/Gt
1700%
pure
UHMWPE,
respectively.
Simulation
analysis
using
Geant4
suggested
UHMWPE/BN/Gt
composites
exhibited
excellent
neutron-shielding
performance
presence
abundant
hydrogen
elements.
addition,
demonstrated
friction
wear
combined
effects
constructing
transfer
film
on
surface
pair
timely
removal
frictional
heat
generated
at
sliding
interface.
