Materials,
Год журнала:
2024,
Номер
17(22), С. 5595 - 5595
Опубликована: Ноя. 15, 2024
Coating
conductive
nanoparticles
onto
the
surface
of
hollow
glass
microspheres
(HGMs)
is
essential
for
broadening
their
applications.
However,
low
density
and
high
specific
area
HGM
powders,
along
with
thin
walls
cavity
shells
poor
adhesion,
pose
challenges
uniform
attachment
functional
particles.
In
this
study,
we
developed
a
novel
integrated
process
that
combines
flotation,
hydroxylation,
amination
pretreatment
HGMs
in
situ
polymerization
to
achieve
coating
polypyrrole
(PPy)
on
HGMs.
We
explored
corresponding
growth
mechanism.
Our
findings
indicate
amount
coating,
particle
size,
uniformity
PPy
are
significantly
influenced
by
time,
as
well
microspheres/pyrrole
feedstock
ratio.
The
resulted
encapsulation
spherical
PPy,
average
size
PPy-coated
(PPy@HGMs)
increasing
14.60%
compared
original
elemental
nitrogen
PPy@HGMs
primarily
exists
form
C-N
N-H
bonds.
This
study
demonstrates
groups
engage
chemical
bonding
interactions
molecules.
Mechanistic
analysis
reveals
hydroxyl
amino
enriched
pretreated
serve
activation
centers,
facilitating
enrichment
pyrrole
monomers
promoting
chain
conjugated
through
nucleophilic
electrophilic
subamino
ring.
Additionally,
reaction
between
Lewis
acid
properties
Lewis-type
electron-donating
KH550
fosters
strong
formation
robust
interface.
Materials Horizons,
Год журнала:
2024,
Номер
11(18), С. 4256 - 4274
Опубликована: Янв. 1, 2024
Increase
in
emission
of
EM
radiation
due
to
electronic
devices
risks
both
equipment
and
human
health
which
have
been
reduced
by
using
cost
effective,
environmental
stability,
lightweight
PPy-metal
oxide
nanocomposites
for
EMI
shielding.
Frontiers in Bioengineering and Biotechnology,
Год журнала:
2025,
Номер
13
Опубликована: Март 21, 2025
Rice
husk-derived
activated
carbon
was
hybridized
with
polypyrrole
hydrogel
(Pyh),
producing
advanced
nanocomposite
(Pyh/AC).
The
composite
applied
as
an
enhanced
adsorbent
for
two
forms
of
toxic
phenolic
compounds,
particularly
bisphenol-A
(BSP-A)
and
4-chlorophenol
(4-CL).
adsorption
studies
were
evaluated
considering
the
synthetic
effect
Pyh
based
on
criteria
statistical
physics
equilibrium
modeling.
reported
saturation
capacities
BSP-A
4-CL
using
Pyh/AC
are
321.4
mg/g
365.8
mg/g,
respectively.
These
values
significantly
higher
than
estimated
in
separated
form.
analysis
steric
properties
validated
about
169.7
119.5
active
site
density
during
uptake
4-CL,
densities
(110.5
99.3
(4-CL)),
demonstrating
positive
impact
hybridization
process
terms
surface
area,
porosity,
incorporated
chemical
functional
groups.
Furthermore,
capacity
each
structure
to
accommodate
up
3
molecules
6
displays
operation
multi-molecular
mechanisms
ordering
these
adsorbed
vertically
non-parallel
forms.
energies,
either
classic
(<21
kJ/mol)
or
(<20
isotherm
studies,
reflect
physisorption
compounds
Pyh/AC.
also
shows
thermodynamically
stable
reactions
that
occurred
exothermic,
favorable,
spontaneous
properties.
Nano-Micro Letters,
Год журнала:
2024,
Номер
17(1)
Опубликована: Дек. 2, 2024
Abstract
The
rapid
development
of
communication
technology
and
high-frequency
electronic
devices
has
created
a
need
for
more
advanced
electromagnetic
interference
(EMI)
shielding
materials.
In
response
to
this
demand,
study
been
conducted
develop
multifunctional
carbon
nanofibers
(CNFs)/polyaniline
(PANI)
aerogels
with
excellent
shielding,
flame
retardancy,
thermal
insulation
performance.
process
involved
freeze-drying
electrospun
CNFs
PANI
nanoparticles
followed
by
in
situ
growth
coat
the
CNFs,
creating
core–shell
structured
CNFs/PANI
composite
fiber
its
hybrid
(CP-3@PANI).
interaction
between
aniline
(ANI)
provides
attachment
sites,
allowing
additional
ANI
adsorption
into
aerogel
polymerization.
This
results
uniformly
covering
surface
flexible
CNF
core
shell.
enhances
utilization
rate
monomer
increases
content
loaded
onto
aerogel.
Additionally,
effective
connections
are
established
forming
stable,
conductive
three-dimensional
network
structure.
prepared
CP-3@PANI
exhibit
EMI
efficiency
(SE)
85.4
dB
specific
SE
(SE
d
−1
)
791.2
cm
3
g⁻
1
X-band.
Due
synergistic
flame-retardant
effect
PANI,
dopant
(phytic
acid),
demonstrate
outstanding
properties,
peak
heat
release
(PHRR)
as
low
7.8
W
total
only
0.58
kJ
.
an
strategy
preparing
integrated
Crystals,
Год журнала:
2025,
Номер
15(1), С. 99 - 99
Опубликована: Янв. 20, 2025
Hexagonal
boron
nitride
(h-BN)
has
emerged
as
a
promising
dielectric
material
for
protecting
metallic
substrates
such
copper
and
steel
under
ambient
conditions.
The
layered
structure
of
h-BN
offers
significant
potential
in
preventing
the
oxidation
corrosion
these
substrates.
Due
to
their
impermeability,
nanosheets
(BNNSs)
do
not
form
galvanic
cell
with
underlying
metals,
enhancing
effectiveness
protective
coatings.
BNNSs
are
both
thermally
chemically
stable,
making
them
suitable
coatings
that
protect
against
environmental
degradation.
Additionally,
have
demonstrated
excellent
fire
resistance,
hydrophobicity,
resistance
when
applied
wood,
functioning
binder-free,
retardant
coating
remains
effective
up
900
°C
air.
This
review
focuses
on
anti-corrosion
properties
BNNSs,
particularly
substrates,
discusses
various
methods
application.
article
also
future
perspectives
this
field,
including
innovative
concept
wooden
satellites
designed
short-
long-term
missions.
