ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(45), С. 62639 - 62653
Опубликована: Ноя. 4, 2024
Developing
devices
emphasizing
safety
protection
is
becoming
increasingly
important
due
to
the
widespread
occurrence
of
impact
damage
and
thermal
hazards.
Herein,
F-SSG/TPU-based
circular
cavity
structure
(FC)
developed
through
a
convenient
efficient
template
method,
which
can
effectively
achieve
anti-impact
insulation
for
protection.
The
flame-retardant
shear
stiffening
gel/thermoplastic
urethane
(F-SSG/TPU)
synthesized
dynamic
interaction
between
SSG,
TPU,
modified
ammonium
polyphosphate
(APP@UiO-66-NH2)
by
thermo-solvent
reactions.
FC
dissipate
force
from
4.19
0.99
kN
at
45
cm
impacting
heights,
indicating
good
performance.
Moreover,
test
demonstrates
that
achieves
temperature
drop
76
°C
160
attributed
unique
design.
Under
continuous
shock
high-temperature
flame,
remains
intact,
its
performance
almost
undamaged.
These
results
elaborate
designed
resist
various
damage,
such
as
collision.
Then,
wearable
wristband
integrated
with
exhibits
superior
resistance
heat
properties
compared
commercial
wristbands.
In
short,
this
based
on
high-performance
F-SSG/TPU
material
shows
promising
potential
applications
in
field.
Advanced Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 6, 2024
Abstract
There
is
an
emerging
requirement
of
advanced
functional
materials
for
simultaneous
thermal
protection
and
electromagnetic
wave‐transparent
transmission
applications.
A
novel
polyimide
(PI)
aerogel‐based
sandwich‐structural
composite
developed
to
meet
such
a
in
this
study.
This
based
on
unidirectional
fluorinated
PI
(FPI)
aerogel
as
lower
layer,
nondirectional
conventional
middle
FPI
aerogel/paraffin
phase‐change
upper
layer.
The
layer
exhibits
unique
porous
microstructure
ultralow
dielectric
constant
1.04.
possesses
dynamical
temperature
regulation
capability
thanks
its
loaded
paraffin
having
high
latent
heat
capacity
242.7
J
g
−1
.
presence
the
can
effectively
prevent
against
leakage
from
surface
composite.
Through
rational
integration
three
layers,
sandwich‐structured
not
only
provide
gradient
hot
objects
over
long
period
but
also
excellent
establish
communication
between
two
electromagnetically
shielded
electronic
devices.
With
prominent
insulation
functions,
great
potential
specific
applications
aircraft,
spacecraft,
radar
systems,
satellite
communication.
The
demand
for
temperature-robust
electromagnetic
wave
(EMW)
absorption
materials
is
escalating
due
to
the
varying
operational
temperatures
of
electronic
devices,
which
can
easily
soar
up
100
°C,
significantly
affecting
EMW
interference
management.
Traditional
absorbers
face
performance
degradation
across
broad
temperature
ranges
alterations
in
mobility
and
material
impedance.
This
study
presented
a
novel
approach
by
integrating
semiconductor
metal-organic
frameworks
(SC-MOFs)
with
paraffin
wax
(PW),
leveraging
precise
control
interlayer
spacing
SC-MOFs
electron
regulation
introduction
temperature-inert
properties.
synergistic
strategy
enhanced
dielectric
properties
impedance
matching
from
ambient
°C.
A
metamaterial
shell
layer,
designed
through
finite
element
simulation
fabricated
3D
printing,
encapsulated
composite,
resulting
broadband
absorber
an
11.81
GHz
effective
bandwidth
nearly
unchanged
peak
position
25-100
paves
way
advanced
management
capable
operating
reliably
extreme
environments.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
17(1), С. 2293 - 2303
Опубликована: Дек. 20, 2024
The
application
of
organic
solid–liquid
phase
change
materials
(PCMs)
is
limited
for
the
leakage
problem
after
and
high
rigidity.
In
this
work,
a
novel
flexible
solid–solid
PCM
(DXPCM)
was
synthesized
using
block
copolymerization
process
with
polyethylene
glycol
(PEG)
as
energy
storage
segment.
transition
temperature
(from
36.2
to
49.4
°C)
enthalpy
83.27
123.35
J/g)
DXPCM
could
be
changed
through
adjusting
molecular
weight
PEG.
introduction
hard
chain
segments
endowed
excellent
flexibility,
foldability,
mechanical
properties
at
room
temperature.
large
number
internal
hydrogen
bonds
π–π
stacking
provided
interesting
thermally
induced
switchable
adhesion
recyclability.
release
elastic
potential
ensured
that
recover
its
original
shape
being
deformed
by
external
forces.
It
worth
mentioning
exhibits
infrared
stealth
capability
it
can
absorb
latent
heat
long
period
time.
conclusion,
work
developed
film
strength,
adhesion,
recovery
capability,
which
has
great
in
stealth.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(45), С. 62639 - 62653
Опубликована: Ноя. 4, 2024
Developing
devices
emphasizing
safety
protection
is
becoming
increasingly
important
due
to
the
widespread
occurrence
of
impact
damage
and
thermal
hazards.
Herein,
F-SSG/TPU-based
circular
cavity
structure
(FC)
developed
through
a
convenient
efficient
template
method,
which
can
effectively
achieve
anti-impact
insulation
for
protection.
The
flame-retardant
shear
stiffening
gel/thermoplastic
urethane
(F-SSG/TPU)
synthesized
dynamic
interaction
between
SSG,
TPU,
modified
ammonium
polyphosphate
(APP@UiO-66-NH2)
by
thermo-solvent
reactions.
FC
dissipate
force
from
4.19
0.99
kN
at
45
cm
impacting
heights,
indicating
good
performance.
Moreover,
test
demonstrates
that
achieves
temperature
drop
76
°C
160
attributed
unique
design.
Under
continuous
shock
high-temperature
flame,
remains
intact,
its
performance
almost
undamaged.
These
results
elaborate
designed
resist
various
damage,
such
as
collision.
Then,
wearable
wristband
integrated
with
exhibits
superior
resistance
heat
properties
compared
commercial
wristbands.
In
short,
this
based
on
high-performance
F-SSG/TPU
material
shows
promising
potential
applications
in
field.
