Journal of Natural Fibers,
Год журнала:
2024,
Номер
21(1)
Опубликована: Дек. 6, 2024
This
study
identified
plant-based
materials
for
use
as
flame
retardants
in
combination
with
bacterial
cellulose
(BC)
and
enhanced
the
retardancy
of
BC
fabrics.
Eight
were
screened
via
thermogravimetric
analysis,
banana
peel,
beet,
spinach
selected
retardants.
The
chemical
physical
structure
analyses
samples
treated
spinach,
respectively,
revealed
that
entrapped
within
matrices
without
changing
BC.
retardant-treated
was
compared
to
sodium
metasilicate
nonahydrate,
which
is
a
commercial
retardant.
Vertical
flammability
char
morphology
studies
confirmed
formed
honeycomb
chars
during
combustion.
limiting
oxygen
indices
40–47%,
exceeded
nonahydrate-treated
36%.
In
residual
masses
similar
Therefore,
fabrics
improved
developed
using
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 8, 2025
Abstract
Polymeric
materials
featuring
excellent
flame
retardancy
are
essential
for
applications
requiring
high
levels
of
fire
safety,
while
those
based
on
biopolymers
highly
favored
due
to
their
eco‐friendly
nature,
sustainable
characteristics,
and
abundant
availability.
This
review
first
outlines
the
pyrolysis
behaviors
biopolymers,
with
particular
emphasis
naturally
occurring
ones
derived
from
non‐food
sources
such
as
cellulose,
chitin/chitosan,
alginate,
lignin.
Then,
strategies
chemical
modifications
flame‐retardant
purposes
through
covalent,
ionic,
coordination
bonds
presented
compared.
The
is
placed
advanced
methods
introducing
biopolymer‐based
retardants
into
polymeric
matrices
fabricating
materials.
Finally,
challenges
sustaining
current
momentum
in
utilization
further
discussed.
Polymers,
Год журнала:
2025,
Номер
17(2), С. 249 - 249
Опубликована: Янв. 20, 2025
The
sustainable
flame
retardancy
of
polymeric
materials
is
a
key
focus
for
the
direction
next
generation
in
field
fire
safety.
Bio-derived
retardants
are
gaining
attention
as
environmentally
friendly
additives
due
to
their
low
ecological
impact
and
decreasing
costs.
These
compounds
can
enhance
char
formation
by
swelling
upon
heating,
attributed
functional
groups.
This
review
explores
various
biomolecules
used
retardants,
including
phytic
acid,
chitosan,
lignin,
tannic
bio-derived
phosphorus
nitrogen
compounds,
emphasizing
flame-retardant
properties
compatibility
with
different
polymer
matrices.
primary
on
structural
characteristics,
modifications,
behaviors
these
additives,
particularly
regarding
mechanisms
action
within
materials.
Finally,
opportunities,
current
challenges,
future
directions
practical
application
ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(15), С. 9238 - 9248
Опубликована: Июль 29, 2024
To
endow
epoxy
resins
(EPs)
with
outstanding
flame-retardant
and
smoke-inhibiting
effects,
a
multifunctional
nanoparticle
(SCP)
has
been
designed
prepared
via
simple
approach,
wherein
Cu2O,
melamine,
phosphorus-containing
flame
retardants
were
successively
deposited
onto
the
surface
of
silica
nanospheres.
The
incorporation
low
addition
amount
2
wt
%
SCP
within
EP
demonstrates
significant
improvement
in
retardancy.
This
enhancement
is
evidenced
by
notable
increase
limiting
oxygen
index
to
29.2%
attainment
V-1
rating
vertical
burning
test,
contrast
respective
values
23.8%
no
for
unmodified
EP,
respectively.
Moreover,
total
smoke
production,
peak
heat
release
rate,
production
rate
CO
EP/SCP-2
during
cone
calorimeter
test
decreased
10.2%,
26.1%,
37.0%,
Besides,
also
endows
composites
commendable
mechanical
properties
glass
transition
temperature
(Tg),
as
22.5%
impact
strength,
an
8.1%
rise
tensile
9.5%
Tg,
comparing
EP.
mechanism
analysis
revealed
that
functions
resin
through
both
gas-phase
condensed-phase
mechanisms.
Overall,
proposed
strategy
presents
promising
approaches
simultaneously
enhancing
fire
safety
performance
polymer
materials.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 18, 2025
Abstract
Freeze
casting
is
a
versatile
technique
for
organizing
low‐dimensional
building
blocks
into
ordered
porous
structural
materials.
However,
the
freeze‐casting
fabrication
of
materials
with
robust
and
topologically
elastic
skeleton
to
withstand
harsh
conditions
challenging.
Herein,
silanized
ultra‐homogeneous
nanocomposite
aerogel
fabricated
using
gelation‐constrained
strategy.
Diverging
from
traditional
methods
employing
solution
precursor,
approach
involves
process
utilizing
rational‐designed
supramolecular
hydrogel
as
quasi‐solid
precursor.
The
within
hydrogel,
enclosed
in
dense
hydrogen‐bonded
network,
effectively
mitigate
secondary
agglomeration
caused
by
ice
crystallization
concentration
enrichment
during
freeze‐casting.
By
forming
cellular
an
interconnected
nanoparticle
resulting
aerogels
exhibit
exceptional
mechanical
elasticity
retaining
over
98%
height
after
10
000
compression
cycles,
along
superior
electrical
properties
showing
78.9%
increase
conductivity
compared
conventional
aerogels.
Wearable
piezoresistive
sensors
these
demonstrate
outstanding
force
sensing
capabilities,
broad
linear
range
(0–17.6
kPa)
high
sensitivity
(1.32
kPa
−1
).
When
integrated
intermediate
layer
protective
garments,
offer
insulation
fire
resistance,
enabling
them
endure
like
repetitive
extreme
deformations,
exposure
high‐temperature
flames,
water‐erosion
damages.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 19, 2024
In
order
to
create
green
nanocoatings
with
high
fire
resistance,
titanium
dioxide
(TiO2),
montmorillonite
(MMT),
and
poly(acrylic
acid)
(PAA)
are
used
as
the
flame-retardant
(FR)
system
that
is
prepared
by
layer-by-layer
self-assembly
technique.
The
thermal
behaviors
FR
performance
of
coated
fabrics
polyurethane
foam
(PUF)
determined
gravimetric
analysis,
vertical/horizontal
flame
tests,
a
cone
calorimeter.
effect
layering
polymers
between
metallic
nanoparticles
(NPs)
clay
sheets
on
growth
behavior
retardancy
investigated.
assembly
TiO2/PAA/MMT
trilayer
(TL)
system,
incorporating
polyelectrolyte
layer
inorganic
layers,
results
in
significantly
thicker
heavier
coating.
This
could
be
attributed
infiltration
PAA
chains
into
interstitial
spaces
TiO2
NPs,
which
also
introduce
additional
interactive
sites.
addition
multilayered
composites
greatly
improves
properties.
Cone
calorimeter
analysis
demonstrates
10
TL
nanocomposite,
approximately
160
nm
thickness,
applied
PUF,
completely
suppresses
second
peak
heat
release
rate
enhances
other
fire-retardant
properties
relative
TiO2/MMT
system.
markedly
enhanced
observed
increased
char
yield
facilitated
incorporation
PAA.
polymer
layers
promotes
deposition
greater
quantity
NPs
while
maintaining
tightly
packed
nanobrick
wall
structure.
