Aerogels
are
considered
highly
promising
materials
for
superior
thermal
insulation
across
building,
electric
vehicle,
and
textile
area.
Nevertheless,
the
inherent
deficiency
in
mechanical
compressibility
stability
of
sole
ceramic
aerogels
poses
significant
challenges
to
their
further
application.
The
hybrid
with
an
oriented
cellular
structure
parallel
walls
connected
by
bridges
orthogonal
direction
presented
through
a
physical
process.
fibrous
frames
composed
bacterial
cellulose
constructed
enhanced
montmorillonite
nanosheets
silica
sols
self-assembly
process
achieve
high
(>99%
strain)
robustness
(1.015
MPa),
retaining
97.8%
height
retention
under
considerable
compressive
strain
50%
500
cycles.
Moreover,
demonstrate
remarkable
set
properties,
such
as
being
superlight
(8.85
mg·cm–3
99.39%
porosity),
excellent
insulating
performance
(λ
=
0.0131
W·m–1·K–1),
wide
working
temperature
range
(−196
200
°C),
self-extinguishing,
self-cleaning/hydrophobic
(126.4°
WCA).
successful
synthesis
provides
more
opportunities
design
robust
management.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(5), P. 4784 - 4795
Published: Feb. 21, 2024
The
significant
accumulation
of
fly
ash
has
resulted
in
serious
environmental
issues.
It
is
imperative
to
find
a
safe
and
high-value
method
for
reusing
effectively
address
this
problem.
Additionally,
silica
aerogels
have
gained
attention
as
promising
material
energy
conservation
thermal
management.
However,
producing
aerogel
with
low
production
costs
superior
overall
properties
still
major
challenge.
In
study,
silica–chitosan
composite
(SCA)
were
prepared
from
chitosan.
Amorphous
polymerized
situ
on
chitosan
by
hydrogen
bonding
silyl-oxygen
condensation.
resulting
exhibited
fully
formed
block
structure,
extremely
density,
exceptional
flame
retardancy,
notable
mechanical
(able
withstand
24,000
times
the
stress
its
own
mass).
noteworthy
that
nanopores
three-dimensional
network
structure
endow
SCA
excellent
insulation
performance
(with
conductivity
0.0474–0.0521
W
m–1
K–1).
strategy
presented
here
provides
cost-effective
straightforward
approach
prepare
SCA.
results
demonstrate
considerable
potential
practical
use
energy-efficient
thermally
insulated
structures.
Moreover,
offers
direct
high
value-added
solution
problem
ash.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Abstract
Upcycling
of
low
valuable
plastic
waste
into
materials
with
enhanced
properties
helps
progress
toward
establishing
a
plastics
circular
economy.
Furthermore,
implementing
recyclability
as
core
design
criterium
for
newly
formed
can
significantly
increase
their
impact
on
sustainability,
yet
rarely
explored.
In
this
work,
the
upcycling
polystyrene
(PS)
is
presented
closed‐loop
recyclable
high‐performance
aerogels.
Through
simple
post‐functionalization
process,
PS
aminated
to
generate
polyfunctional
amine,
which
then
reacted
aldehydes
form
cross‐linked
imine
network.
This
network
subsequently
dried
produce
poly(styrene‐imine)
aerogels
(PSAs).
The
resulting
PSAs
exhibit
excellent
thermally
insulating
properties,
along
density,
outstanding
mechanical
strength,
and
intrinsic
hydrophobicity.
More
importantly,
these
show
quantitative
depolymerization
under
acidic
aqueous
conditions,
back
original
precursors
be
recovered
in
high
yield
purity
reused
synthesis
fresh
nearly
identical
material
thus
achieving
recycling.
work
presents
an
efficient
method
chemically
non‐recyclable
value‐added
advanced
aerogel
materials,
offering
new
pathway
economy
plastics.
Ceramic
nanofibrous
aerogels
exhibit
ultralow
density
and
thermal
conductivity,
which
make
them
ideal
candidates
for
protection
in
extreme
environments.
However,
the
current
limitations
pore-forming
techniques
hinder
their
further
advancement.
In
this
study,
ultralight,
highly
elastic,
high-temperature-resistant
ceramic
were
successfully
prepared
through
direct
foaming
method
using
flexible
Al2O3–SiO2–B2O3
nanofibers
as
raw
materials
Tween
80
agent.
Foams
generated
slurry
exhibited
exceptional
stability,
facilitating
formation
of
a
porous
three-dimensional
network
structure
with
nonoriented
pores
tightly
bonded
fiber
connections
within
green
body
after
drying
process.
This
was
obtained
via
sintering
maintained
stability
at
temperatures
up
to
1000
°C.
addition,
porosity
controlled
by
adjusting
content
An
increase
dosage
resulted
higher
number
air
bubbles
per
unit
volume
slurry,
accompanied
decrease
sizes.
Consequently,
possessed
abundant
small
sizes,
promoting
gradual
deterioration
junctions.
As
result,
demonstrated
elasticity
well
improved
insulation
properties.
These
findings
provide
novel
insights
preparation
performance
regulation
aerogels.
