ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(16), С. 10029 - 10039
Опубликована: Авг. 9, 2024
Interfacial
solar
steam
generation
has
been
regarded
as
a
promising
method
to
produce
freshwater
from
seawater.
Nevertheless,
achieving
simultaneous
optimization
of
high
evaporation
efficiency
along
with
stability
and
durability
remains
substantial
obstacle
for
polyimide
(PI)-based
evaporators.
Herein,
hierarchically
structured
PI/MXene
composite
aerogel
was
prepared
by
electrostatic
spinning,
freeze-drying,
thermal
imidization.
The
combination
PI
nanofibers
MXene
endows
the
hybrid
aerogels
three-dimensional
porous
structures,
intriguing
hydrophilicity,
light
absorption,
resulting
in
augmented
light-to-heat
conversion
efficiency.
Furthermore,
exhibits
an
excellent
water
rate
1.459
kg
m–2
h–1
under
1
sun
photothermal
95.6%.
possesses
distinct
salt
resistance,
eminent
structural
stability,
remarkable
cycling
1.24
over
10
cycles.
This
work
provides
prospective
strategy
constructing
highly
efficient
solar-powered
generator
stable
performance
practical
application
seawater
desalination.
Abstract
The
excellent
performance
of
electromagnetic
wave
absorbers
primarily
depends
on
the
coordination
among
components
and
rational
design
structure.
In
this
study,
a
series
porous
fibers
with
carbon
nanotubes
uniformly
distributed
in
shape
pine
leaves
are
prepared
through
electrospinning
technique,
one‐pot
hydrothermal
synthesis,
high‐temperature
catalysis
method.
impedance
matching
nanofibers
structure
is
optimized
by
incorporating
melamine
into
spinning
solution,
as
it
undergoes
gas
decomposition
during
calcination.
Moreover,
electronic
can
be
modulated
controlling
NH
4
F
content
synthesis
process.
Ultimately,
Ni/Co/CrN/CNTs‐CF
specimen
(P3C
NiCrN12)
exhibited
superior
performance,
while
achieving
minimum
reflection
loss
(RL
min
)
−56.18
dB
at
thickness
2.2
mm
maximum
absorption
bandwidth
(EAB
max
5.76
GHz
2.1
mm.
This
study
presents
an
innovative
approach
to
fabricating
lightweight,
thin
materials
exceptional
properties
wide
optimizing
three
key
factors
influencing
performance.
ACS Nano,
Год журнала:
2024,
Номер
18(43), С. 29457 - 29468
Опубликована: Окт. 18, 2024
Due
to
the
intensification
of
electromagnetic
pollution
and
energy
shortages,
there
is
an
urgent
need
for
multifunctional
composites
that
can
absorb
waves
provide
insulation.
However,
developing
low-cost
wave-absorbing
are
lightweight,
high
strength,
heat-insulating,
large-format
special
environments
remains
challenging.
Inspired
by
conch
shell,
this
article
proposes
a
green
strategy
hydration
recrystallization
self-assembly.
Highly
biologically
active
hydroxyapatite
(HAP)
was
used
lock
in
free
water
prevent
porous
carbon
fibers
from
absorbing
large
amount
water.
Meanwhile,
HAP
underwent
ion
exchange
recombined
with
hydrated
crystals
magnesium
oxychloride
form
gelatinous
HAP-5
phase
crystal.
The
cementitious
crystal
interwoven
interlocked
support
skeleton
metal
Ni
powder
shell
(Bio-CSC)
multiple
interfaces
via
electrostatic
adsorption
complexation.
This
utilized
inorganic
substances
as
bridges
uniformly
disperse
conductive
materials
such
construct
network
enriched
interface
polarization.
prepared
Bio-CSC
composed
heterogeneous
lightweight
specific
strength
increase
300%.
It
also
provided
excellent
thermal
insulation
wave
absorption.
Its
conductivity
0.071
W·m-1·k-1,
lowest
RLmin
value
-21.88
dB,
matching
thickness
only
1.2
mm.
study
overcame
limitations
traditional
absorption
magnetism
single
function
may
be
fields
building
conservation
safety.
Heterointerface
engineering
has
drawn
considerable
interest
in
tuning
interfacial
polarization
and
promoting
impedance
matching.
Therefore,
it
become
a
key
strategy
for
optimizing
electromagnetic
wave
(EMW)
absorption.
This
comprehensive
review
primarily
focused
on
the
EMW
absorbing
strategies
of
polymer-based
materials,
emphasizing
critical
developments
heterointerface
engineering.
A
possible
mechanism
materials
was
proposed,
synergism
multi-components,
microstructure
design,
Key
innovations
structural
design
such
as
porous
structure,
multilayered
segregated
structure
are
explored,
highlighting
their
contributions
to
enhancing
Also,
highlights
latest
research
progress
advanced
conductive
insulating
with
desirable
absorption
performance;
fabrication
methods,
structures,
properties,
mechanisms
were
elucidated
detail.
challenges
presented
followed
by
some
future
perspectives.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 12, 2024
Abstract
Freeze
casting
is
a
solidification
technique
utilized
in
the
fabrication
of
porous
materials.
However,
freeze
process
quite
complex,
and
significant
challenges
remain
precisely
controlling
pore
size
shape
structures.
This
study
aims
to
investigate
customization
multifunctional
electromagnetic
wave
(EMW)
absorbers
with
3D
structures
via
casting.
review
initially
presents
fundamental
principles
underlying
examines
correlation
between
internal
external
factors
during
preparation
porosity.
The
emerging
trends
constructing
novel
intricate
macroscopic
through
are
subsequently
outlined.
Furthermore,
this
focuses
on
composites
various
microstructures
low‐dimensional
building
blocks,
their
EMW
response
properties.
By
regulating
influencing
mechanisms
casting,
absorption
materials
exhibit
outstanding
advantages
such
as
property
manipulation,
controllable
structure,
high
porosity,
specific
surface
area,
lightweight,
flexibility.
These
features
broaden
applications
shielding,
mechanical
property,
radar
stealth,
thermal
insulation
fire
prevention,
flexible
sensors,
antifreeze
ability,
etc.
In
addition,
we
discuss
prospects
high‐performance
using
techniques.
Abstract
Developing
lightweight,
high‐performance
electromagnetic
wave
(EMW)
absorbing
materials
those
can
absorb
the
adverse
radiation
or
waves
are
of
great
significance.
Transition
metal
carbides
and/or
nitrides
(MXenes)
a
novel
type
2D
nanosheets
associated
with
large
aspect
ratio,
abundant
polar
functional
groups,
adjustable
conductivity,
and
remarkable
mechanical
properties.
This
contributes
to
high‐efficiency
assembly
MXene‐based
aerogels
possessing
ultra‐low
density,
specific
surface
area,
tunable
unique
3D
porous
microstructure,
which
is
beneficial
for
promoting
EMW
absorption.
Therefore,
absorption
have
attracted
widespread
attention.
review
provides
an
overview
research
progress
on
absorption,
focusing
recent
advances
in
component
structure
design
strategies,
summarizes
main
strategies
constructing
aerogels.
In
addition,
based
mechanisms
regulation
preparation
methods
properties
varieties
components
pore
structures
detailed
advance
understanding
relationships
composition‐structure‐performance.
Furthermore,
future
development
challenges
faced
by
summarized
prospected.
