Metals,
Journal Year:
2024,
Volume and Issue:
14(7), P. 786 - 786
Published: July 5, 2024
Glycidyl
azide
polymer
(GAP)-coated
sub-micron
aluminum
(sub-mAl@GAP)
particles
exhibit
higher
heat
release
than
their
uncoated
counterparts
under
low
heating
rates.
However,
application
in
explosives
has
been
hindered
due
to
a
lack
of
understanding
energy
characteristics
rates
detonation
levels.
To
address
this
problem,
the
performances
sub-mAl@GAP
ultrafast
stimulated
by
an
electric
explosion
wire
and
high-energy
laser
were
studied.
The
results
showed
that
reaction
was
more
violent
counterpart
stimulus.
Additionally,
time
former
0.4
ms
shorter
latter.
In
addition,
propagations
shock
waves
sub-mAl
analyzed.
propagation
distances
all
longer
those
fluences
0.5
J/cm2,
1.2
2.4
J/cm2.
distance
difference
gradually
increased
with
decrease
fluence.
Under
fluence
velocity
differences
both
largest
contribution
from
GAP.
conclusion,
fast
decomposition
rate
GAP
its
would
benefit
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Abstract
The
combustion
efficiency
and
reactivity
of
aluminum
(Al)
particles,
as
a
crucial
component
in
solid
propellants,
are
constrained
by
the
inert
oxide
layer
(Al
2
O
3
).
Polytetrafluoroethylene
(PTFE)
can
remove
layer,
however,
carbon
deposition
generated
during
reaction
process
still
limits
Al/PTFE
fuel.
Here,
litchi‐like
fuel
with
nano‐PTFE
islands
distributed
on
Al
particles
surface
is
successfully
designed,
based
localized
activation
synergistic
strategies,
to
solve
deposition.
This
unique
PTFE‐coated
structure
achieve
etching,
creating
channels,
exposing
active
Al.
Such
channel
network
promotes
circulation
fluorine
oxygen,
stimulating
reactions
Al‐F
Al‐O
energy
output.
Regulating
PTFE
content
maximize
elimination
full
Al/PTFE.
maximum
flame
area
pressure
output
increased
241.9%,
734.7%,
118.4%,
265.2%,
respectively,
compared
traditional
physical
mixture
core‐shell
fuels.
effects
effectively
transform
waste
into
valuable
resource,
introducing
novel
approach
for
propellants.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(11), P. 13347 - 13357
Published: May 21, 2024
The
development
of
nanoenergetic
materials
with
adjustable
reaction
performance
is
the
key
to
achieving
controllable
ignition
and
propulsion.
It
has
become
one
research
hotspots
scientists
in
field
energetic
materials.
Due
its
excellent
combustion
good
film-forming
properties,
Al/PVDF
system
reactivity
a
wide
application
potential
for
In
this
work,
an
Al@PTA/PVDF
film
tunable
was
successfully
prepared
by
situ
coating
polytannic
acid
(PTA)
interface
on
surface
Al
nanoparticles
(nAl)
composite
assembly
polyvinylidene
fluoride
(PVDF).
differential
scanning
calorimetry
results
show
that
main
exothermic
peak
7.0
°C
higher
than
pure
when
thickness
PTA
adjusted,
interlayer
can
also
change
mode
nAl
PVDF
multiband
exothermic.
addition,
thickening
interface,
activation
energy
increases
from
270.2
316.1
kJ/mol,
average
burning
rate
gradually
decreases
152.68
mm/s.
These
indicate
better
control
Al/PVDF,
which
will
promote
concluded
degree
contact
diffusion
length
mass
transfer
between
components
be
changed
introducing
intermediate
nanolayer
fuel
oxidant,
allows
various
adjusted.
