Journal of Energetic Materials,
Год журнала:
2024,
Номер
unknown, С. 1 - 21
Опубликована: Дек. 26, 2024
The
current
study
examined
the
stabilizing
effect
of
lignin
biopolymer
in
comparison
to
traditional
2-nitrodiphenylamine
(2-NDPA)
and
1,3-Dimethyl-1,3-diphenylurea
(C-II)
stabilizers
on
stability
double-base
nitrocellulose
(NC)/diethylene
glycol
dinitrate
(DEGDN)
propellant
during
artificial
aging
(at
338.65
K
for
60
days).
Various
spectroscopic
techniques,
including
Fourier
Transform
Infrared
Spectroscopy
(FTIR)
X-ray
Diffraction
(XRD),
were
used,
along
with
tests
like
Bergmann-Junk
(BJ)
test
isothermal
thermogravimetric
analysis
(TGA).
Experimental
results
confirmed
that
FTIR
XRD
provided
valuable
insights
into
chemical
changes
aging.
Particularly,
lignin-stabilized
NC/DEGDN
exhibited
comparable
C-II
2-NDPA
at
all
stages
aging,
as
evidenced
by
amount
released
nitrous
gases
measured
BJ
thermal
assessed
TGA.
Additionally,
multivariate
data
using
principal
component
(PCA)
spectra
successfully
differentiated
between
aged
unaged
samples
highlighted
trends
stability.
Overall,
findings
suggest
offers
a
propellants
relative
stabilizers.
Abstract
Carbon
fibers
(CFs)
with
notable
comprehensive
properties,
such
as
light
weight,
high
specific
strength,
and
stiffness,
have
garnered
considerable
interest
in
both
academic
industrial
fields
due
to
their
diverse
advanced
applications.
However,
the
commonly
utilized
precursors,
polyacrylonitrile
pitch,
exhibit
a
lack
of
environmental
sustainability,
costs
are
heavily
reliant
on
fluctuating
petroleum
prices.
To
meet
substantial
market
demand
for
CFs,
significant
efforts
been
made
develop
cost‐effective
sustainable
CFs
derived
from
biomass.
Lignin,
most
abundant
polyphenolic
compound
nature,
is
emerging
promising
precursor
which
well‐suited
production
its
renewable
low
cost,
carbon
content,
aromatic
structures.
Nevertheless,
majority
lignin
raw
materials
currently
pulping
biorefining
by‐products,
heterogeneous
restricting
industrialization
lignin‐derived
CFs.
This
review
classifies
fossil‐derived
biomass‐derived
starting
sources
chemical
structures
lignin,
outlines
preparation
methods
linked
performance
A
discussion
presented
relationship
between
structural
characteristics
spinning
preparation,
structure‐morphology‐property
Additionally,
potential
applications
these
various
domains,
including
energy,
catalysis,
composites,
other
products,
also
described
objective
spotlighting
unique
merits
lignin.
Finally,
current
challenges
faced
future
prospects
advancement
proposed.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 24, 2025
Wood
has
a
number
of
undesirable
inherent
properties
that
limit
its
ability
to
be
used
in
wider
range
applications.
For
this
reason,
study,
copper-montmorillonite
nanoparticles
were
prepared
from
natural
biomass
tung
oil
and
the
mineral
montmorillonite
by
ion
exchange
method.
Modified
wood
with
intercalated
was
simple
environmentally
friendly
impregnation
curing
process.
The
rate
greatly
accelerated
addition
nanoparticles.
surface
contact
angle
increased
85.0°
152.2°
after
copper-montmorillonite-tung
treatment,
remarkably,
it
remained
at
144.2°
180
s.
After
192
h
immersion,
water
absorption
decreased
90.0%
compared
control
group,
which
resistance
swelling
as
high
59.00%,
significantly
improved
dimensional
stability
wood.
15
days
ultraviolet
irradiation,
oil-treated
showed
68.89%
reduction
redness
value
significant
increase
resistance.
Copper-montmorillonite-tung
enhanced
effectiveness
against
mildew.
On
eighth
day
Aspergillus
niger
infestation,
already
full
mildew,
whereas
not
infested
In
particular,
28
infestation
Penicillium
oryzae,
modified
free
fungus,
100%
mildew
prevention
efficiency.
addition,
2
weeks
leaching,
leaching
impregnated
material
only
0.22%,
facilitating
long-term
protection
present
study
synergistic
treatment
strategy
provides
innovative
methods
potential
ideas
for
extending
service
life
products
high-value
utilization
also
scale
up
protection.
ACS Omega,
Год журнала:
2025,
Номер
10(6), С. 6210 - 6219
Опубликована: Фев. 5, 2025
Lignin,
a
natural
aromatic
polymer,
is
promising
candidate
for
sustainable
photonic
materials.
However,
its
heterogeneity
hinders
uniform
nanoparticle
production.
This
study
employs
membrane
ultrafiltration
to
fractionate
alkaline
lignin
into
five
molecular
weight
fractions
(UL1-UL5)
and
synthesizes
nanoparticles
(LNPs)
via
antisolvent
self-assembly.
Low-molecular-weight
yielded
highly
uniform,
monodisperse
LNPs
(PDI
<
0.1),
while
higher-molecular-weight
produced
irregular
particles.
Notably,
strong
correlation
between
size
was
observed,
with
particle
decreasing
as
the
increased.
Atomic
force
microscopy
density
functional
theory
simulations
provided
insights
intermolecular
interactions
of
fractions,
showing
that
low-molecular-weight
exhibited
stronger
forces,
facilitating
ordered
These
findings
underscore
pivotal
role
in
tailoring
properties
achieving
precise
control
over
formation.
highlights
potential
ultrafiltration-based
approaches
producing
lignin-based
materials
customizable
optical
properties.
