ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(14), С. 8027 - 8039
Опубликована: Июль 12, 2024
In
this
work,
an
aerogel
with
excellent
flame
retardancy,
enhanced
compression
modulus,
and
efficient
thermal
insulation
was
developed
from
poly(vinyl
alcohol)
(PVA),
biobased
phytic
acid
(PA),
single-walled
carbon
nanohorns
(SWCNHs).
The
microstructural
evolution
of
the
freeze-dried
PVA/PA/SWCNH
composite
aerogels
revealed
that
varied
amounts
could
influence
three-dimensional
architecture.
Especially,
when
concentration
PA
1.5%,
PVA/PA/SWCNHs
a
tightly
arranged
"short
tubes"
structure
had
high
compressive
modulus
2.02
MPa,
corresponding
to
specific
20.2
MPa
cm3/g.
Compared
PVA/SWCNHs
aerogel,
showed
better
fire
as
confirmed
by
limited
oxygen
index
(LOI)
tests
cone
calorimetry
(CC)
tests.
Notably,
introduction
at
1.5%
resulted
in
LOI
values
up
49.8
±
0.1%
pHRR
THR
were
dramatically
reduced
74.3
81.0%,
respectively.
addition,
different
concentrations
exhibited
performance
slightly
lower
conductivity
(32.2–46.9
mW/(m
K))
resisted
∼1300
°C
flame.
Meanwhile,
synergistic
retardancy
between
SWCNHs
also
analysis
char
residues
gas-phase
products.
These
unique
characteristics
make
promising
multifunctional
candidate
for
applications
aviation,
aerospace,
other
fields.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 19, 2024
The
ambition
of
human
beings
to
create
a
comfortable
environment
for
work
and
life
in
sustainable
way
has
triggered
great
need
advanced
thermal
insulation
materials
past
decades.
Aerogels
foams
present
prospects
as
insulators
owing
their
low
density,
good
insulation,
mechanical
robustness,
even
high
fire
resistance.
These
merits
make
them
suitable
many
real-world
applications,
such
energy-saving
building
materials,
thermally
protective
aircrafts
battery,
warming
fabrics.
Despite
advances,
date
there
remains
lack
comprehensive
yet
critical
review
on
the
materials.
Herein,
recent
progresses
fire-safe
thermal-insulating
aerogels
are
summarized,
pros/cons
three
major
categories
aerogels/foams
(inorganic,
organic
hybrids)
discussed.
Finally,
key
challenges
associated
with
existing
discussed
some
future
opportunities
proposed.
This
is
expected
expedite
development
insulating
help
sustainable,
safe,
energy-efficient
society.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(14), С. 7489 - 7530
Опубликована: Янв. 1, 2024
Global
population
growth
and
industrialization
have
exacerbated
the
nonrenewable
energy
crises
environmental
issues,
thereby
stimulating
an
enormous
demand
for
producing
environmentally
friendly
materials.
Typically,
biomass-based
aerogels
(BAs),
which
are
mainly
composed
of
biomass
materials,
show
great
application
prospects
in
various
fields
because
their
exceptional
properties
such
as
biocompatibility,
degradability,
renewability.
To
improve
performance
BAs
to
meet
usage
requirements
different
scenarios,
a
large
number
innovative
works
past
few
decades
emphasized
importance
micro-structural
design
regulating
macroscopic
functions.
Inspired
by
ubiquitous
random
or
regularly
arranged
structures
materials
nature
ranging
from
micro
meso
macro
scales,
constructing
microstructures
often
corresponds
completely
functions
even
with
similar
biomolecular
compositions.
This
review
focuses
on
preparation
process,
concepts,
regulation
methods,
synergistic
combination
chemical
compositions
porous
perspective
gel
skeleton
pore
structure.
It
not
only
comprehensively
introduces
effect
physical
BAs,
but
also
analyzes
potential
applications
corresponding
thermal
management,
water
treatment,
atmospheric
harvesting,
CO
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(3), С. 4045 - 4055
Опубликована: Янв. 10, 2024
The
flame-retardant
paper
has
gradually
evolved
into
a
necessary
material
in
various
industries
as
result
of
the
rising
importance
fire
safety,
energy
efficiency,
and
environmental
preservation.
Traditional
cellulose
requires
addition
large
amount
flame
retardants
to
achieve
retardancy,
which
poses
serious
threat
mechanical
quality
environment.
Therefore,
there
is
an
urgent
need
develop
inorganic
fiber
with
good
flexibility,
high
thermal
stability,
inherent
retardancy.
Herein,
inspired
by
"brick-and-mortar"
layered
structure
nature
nacre,
we
developed
composite
unique
alternating
arrangement
organic–inorganic
fibers
synergistically
integrating
environmentally
sustainable
basalt
(BF)
high-performance
aramid
nanofibers
(ANFs)
through
vacuum-assisted
filtration
process.
as-prepared
ANFs/BF
exhibited
low
conductivity
(0.024
W
m–1
K–1),
tensile
strength
(54.22
MPa),
excellent
flexibility.
Thanks
its
remains
at
level
(92%)
after
heat
treatment
300
°C
for
60
min.
Furthermore,
peak
release
rate
smoke
generation
decreased
44.6
95.3%,
respectively.
promising
applications
protective
layer
flexible
electronic
devices,
cables,
fire-retardant
high-temperature
fields.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(20), С. 26757 - 26767
Опубликована: Май 9, 2024
Aerogel
fibers
are
good
thermal
insulators,
suitable
for
weaving,
and
show
potential
as
the
next
generation
of
intelligent
textiles
that
can
effectively
reduce
heat
consumption
personal
management.
However,
production
continuous
aerogel
from
biomass
with
sufficient
strength
radial
elasticity
remains
a
significant
challenge.
Herein,
gel
were
produced
via
wet
spinning
using
agarose
(AG)
matrix,
2,2,2,6,6-tetramethylpiperidine-1-oxyl
radical-oxidized
cellulose
nanofibers
(TOCNs)
reinforcing
agent,
no
other
chemical
additives
by
utilizing
gelling
properties
AG.
Supercritical
drying
vapor
deposition
(CVD)
then
used
to
produce
hydrophobic
AG-TOCN
(HATAFs).
During
CVD,
HATAF
skeleton
was
covered
an
isostructural
silica
coating.
Consequently,
HATAFs
recover
compression
under
60%
strain.
Moreover,
have
low
densities
(≤0.14
g
cm–3),
high
porosities
(≥91.8%),
specific
surface
areas
(≥188
m2
g–1),
moderate
tensile
strengths
(≤1.75
MPa),
excellent
hydrophobicity
(water
contact
angles
>130°),
insulating
at
different
temperatures.
Thus,
expected
become
new
materials
efficient
