Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 22, 2024
Abstract
Aerogel
fibers,
known
for
their
lightweight
and
exceptional
thermal
insulation
properties,
provide
an
ideal
material
solution
fabricating
triboelectric
nanogenerators
(TENGs)
self‐powered
wearable
electronics
in
extreme
environments,
such
as
firefighting
gear.
However,
current
aerogel
fibers
face
limitations
due
to
poor
mechanical
properties
lack
of
performance
stability
under
harsh
conditions.
Herein,
a
facile
strategy
preparing
silica/aramid
nanofiber
(ANF)
composite
with
interpenetrated
dual
networks
silica‐dominant
component
(≈64
wt.%)
is
demonstrated;
the
unique
structure
composition
endow
high
tensile
strength
(3.4
MPa),
low
conductivity
(0.033
W
(m·K)
−1
),
large
specific
surface
area
(587
m
2
g
outstanding
fire
resistance
at
95%
porosity,
combining
best
both
ANF
silica
aerogel.
Moreover,
exhibit
excellent
flexibility
extremely
temperatures
(−196
°C)
maintain
structural
integrity
even
when
exposed
flame
up
5
min.
Leveraging
these
fiber‐based
TENGs
show
electrical
output
before
after
combustion
(>94%
retention).
The
fabrication
offers
promising
opportunities
modulating
functionalities
on
demand,
holding
great
potential
future
applications
smart
protective
fabrics
environments.
