Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 20, 2025
In
aerogel-based
thermal
insulation
materials,
the
challenge
of
balancing
mechanical
properties
(rigidity
and
flexibility)
while
enhancing
performance
under
extreme
temperature
humidity
conditions
persists.
This
study
introduces
an
innovative
biomimetic
aerogel
design
combining
features
shell-like
layered
architecture
loofah
porous
microstructures.
We
developed
polyimide/polyvinylidene
fluoride
(PI/PVDF)
nanofiber
aerogels
with
excellent
properties.
The
material
can
withstand
compressive
loads
up
to
1500
times
its
weight
axial
rigidity,
maintaining
radial
flexibility
80%
strain,
thereby
achieving
a
harmonious
balance
between
structural
rigidity
flexibility.
inclusion
hydrophobic
PVDF
nanofibers
ensures
maintains
low
conductivity
integrity,
even
changes.
multifeature
fusion
shows
great
potential
for
aerospace
applications,
such
as
spacecraft
protection
systems,
effectively
shielding
components
from
stress
during
re-entry
space
missions.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 21, 2025
Abstract
Triboelectric
nanogenerators
(TENGs)
have
gained
significant
attention
for
ability
to
convert
mechanical
energy
into
electrical
energy.
As
the
applications
of
TENG
devices
expand,
their
safety
and
reliability
becomes
priority,
particularly
where
there
is
risk
fire
or
spontaneous
combustion.
Flame‐retardant
materials
can
be
employed
address
these
concerns
without
compromising
performance
efficiency
TENGs.
The
primary
focus
this
review
on
flame‐retardant
materials,
including
polymers,
biomaterials,
liquid
aerogels,
carbon‐based
materials.
fundamental
properties
are
elucidated.
characteristics
each
material
type
described,
along
with
potential
boost
importance
flame
retardancy
in
advancing
technology
projected
from
its
usage
wearable
electronics,
self‐powered
sensors,
smart
textiles.
Current
challenges
such
as
compatibility,
fabrication
complexity,
environmental
addressed,
proposed
strategies
overcoming
them.
This
underscores
significance
strengthening
functionality
devices,
paving
way
widespread
adoption
across
various
industries.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(17), P. 21170 - 21180
Published: Aug. 23, 2024
Flexible
sensors
are
a
significant
component
of
flexible
electronics
for
medical
activity
and
human
physiology
monitoring.
However,
obtaining
multifunctional
sensor
by
simple
process
is
still
challenge.
Herein,
we
propose
transfer
laser-induced
graphene
(LIG)
onto
polydimethylsiloxane.
The
uniform
microcracks
formed
in
the
LIG
layer
during
process,
which
enabled
sensitive,
stable
sensing
with
multiplex
functions
including
stretching,
bending,
twisting,
pressing.
properties
were
investigated.
It
proved
that
constructed
delivered
good
performances.
BoxLucas1
model,
first
time,
proposed
to
simulate
mechanism
perfectly.
porous
microstructures
high-performance
sensor.
various
physical
vibration
signals
motions
monitored
sensor,
proving
potential
applications
fields
health
movement
A
touch
panel
portable
signal
display
system
was
constructed,
sensor's
application
screen
electronics.
self-healable
also
demonstrated.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 23, 2024
Abstract
The
rapid
development
of
thermoelectric‐piezoresistive
dual‐mode
sensors
has
opened
new
avenues
for
enhancing
the
functionality,
miniaturization,
and
integration
flexible
tactile
sensors.
However,
existing
research
primarily
focuses
on
decoupling
temperature
pressure
responses,
which
leaves
a
significant
gap
in
optimizing
sensor
performance
exploring
multifunctional
applications.
To
address
this
limitation,
composite
aerogel
with
layered
porous
structure
is
developed,
integrating
carbon
nanotubes
MXene
as
conductive
materials
reinforced
cellulose
nanofibers.
innovative
design,
characterized
by
ultra‐low
thermal
conductivity
along
superior
electrical
thermoelectric
properties,
allows
resulting
to
monitor
stimuli
without
interference
through
piezoresistive
mechanisms.
Demonstrated
results
reveal
exceptional
sensing
capabilities,
including
minimum
detectable
variation
0.03
K
detection
limit
0.3
Pa.
exhibits
high
sensitivities
33.5
µV
−1
−45.2%
kPa
,
stability
across
both
stimuli.
Furthermore,
unique
multi‐modal
mechanism
supports
various
applications,
such
energy
harvesting,
material
recognition,
complex
information
transmission,
smart
wearable
devices,
electronic
skin,
human‐computer
interaction
interfaces.
This
presents
robust
solution
designing
high‐performance
dual‐modal
significantly
advances
their
practical
applications
multiple
domains.
Polyimide
(PI)
aerogels
have
attracted
a
great
deal
of
attention
due
to
their
low
density
and
excellent
heat
resistance.
However,
PI
produce
large,
irregular
shrinkage
during
the
thermal
imidization
process,
resulting
in
decreased
porosity
strength.
In
this
work,
silane
coupling
agent-modified
ultrafine
glass
fibers
(mUGF)
were
mixed
with
polyamide
acid
solution,
followed
by
freeze-drying
prepare
PI/mUGF
aerogels.
As
inorganic
reinforced
phase,
mUGF
high
aspect
ratio
can
significantly
enhance
skeleton
aerogel,
reducing
its
volume
avoiding
collapse
porous
structure
imidization.
The
aerogel
exhibits
(0.059
g/cm3),
(18%),
good
mechanical
properties,
stability
insulation
(thermal
conductivity
as
31.4
mW/m·K
at
room
temperature,
55.9
300
°C).
Additionally,
also
shows
adsorption
properties
(pump
oil
temperature:
24
g/g;
200
°C:
17
g/g)
structural
stability,
which
be
used
adsorb
oils
organic
solvents
from
polluted
water.
These
findings
promote
design
development
low-shrinkage
robust
for
oil/water
separation
insulation.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 24, 2025
Abstract
Aerogels
excel
in
thermal
insulation
due
to
their
porous
structure,
but
limited
mechanical
strength
restricts
broader
applications.
Thus,
the
development
of
aerogel
composites
for
equipment/personnel
against
and
hazards
extreme
environments
necessitates
more
design
paradigm.
Herein,
a
novel
double‐crosslinked
polyimide
composite
(PIAC)
with
an
organic–inorganic
hybridization
approach
is
prepared.
This
composite,
incorporating
amino‐modified
SiO
2
nanoparticles
reduce
shrinkage/density,
offers
exceptional
from
‐110
°C
300
°C,
flame
resistance,
low
dielectric
constant
(1.4),
conductivity
0.0357
W
(m
K)
−1
self‐cleaning
properties.
Meanwhile,
PIAC
allows
be
manipulated
into
various
shapes
withstand
repeated
folding
unfolding
without
damage.
It
boasts
tensile
8.5
MPa
(2.6‐fold
enhancement)
nominal
elongation
at
break
54%
(17.5‐fold
enhancement),
representing
highest
fracture
toughness
32.99
×
10
6
kJ
m
−3
(47.8‐fold
observed
materials
date.
With
maximum
energy
absorption
reaching
7.46
MJ
when
dissipating
high‐impact
forces,
its
substantial
enhancement
capacity
60%
over
predecessor,
not
only
bolster
matrix
also
amplify
strain
rate
strengthening
effect.
The
fabricated
poised
foldable
mechanical‐thermal‐coupled
protection
where
such
attributes
are
highly
coveted.
