ACS Applied Engineering Materials,
Год журнала:
2024,
Номер
2(12), С. 2970 - 2983
Опубликована: Дек. 3, 2024
Carbon-based
nanofibers
are
critical
materials
with
broad
applications
in
industries
such
as
energy,
filtration,
and
biomedical
devices.
Polyacrylonitrile
(PAN)
is
a
primary
precursor
for
carbon
nanofibers,
but
conventional
electrospinning
techniques
typically
operate
at
low
production
rates
of
0.1-1
mL/h
from
single
spinneret,
limiting
scalability.
In
this
study,
we
introduce
novel
liquid-assisted
ultrahigh-speed
(LAUHS-ES)
technique
that
achieved
actual
over
220
times
faster
than
methods.
This
dramatic
increase
throughput
through
Taylor
cone
stabilization
using
thin
layer
liquid
sheath,
allowing
without
compromising
the
structural
integrity
or
uniformity
nanofibers.
Comprehensive
characterization,
including
scanning
electron
microscopy
(SEM),
atomic
force
(AFM),
Fourier-transform
infrared
spectroscopy
(FTIR),
X-ray
diffraction
(XRD),
confirmed
high
quality,
consistency,
crystallinity
produced
Our
results
demonstrate
PAN
nanofiber
fabrication
can
be
scaled
up
significantly
while
maintaining
precise
control
fiber
morphology
performance.
advancement
holds
substantial
promise
large-scale
industrial
applications,
enabling
more
efficient
cost-effective
carbon-based
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 12, 2024
Abstract
Personal
radiative
cooling
fabrics
are
a
promising
zero‐energy
solution
for
creating
cool
and
comfortable
microclimate
outdoor
crowds.
Despite
significant
progress,
achieving
efficient
under
some
extreme
situations,
such
as
thermal
shock
intensive
physical
activity,
remains
challenge.
Herein,
bioinspired
metafabric
with
dual‐gradient
Janus
design
is
reported
personal
evaporative
cooling.
The
hierarchical
fiber
structure
allows
an
excellent
solar
reflectance
of
99.4%
mid‐infrared
emittance
0.94,
inducing
skin
temperature
drop
17.8
°C
intense
sunlight.
Mesoporous
silica
nanoparticles
fixed
in
the
fibrous
network
can
store
capacity
by
atmospheric
moisture‐absorption
mild
humid
nighttime
release
moisture‐desorption
hot
daytime,
providing
additional
2.5
°C.
Dual‐gradient
endows
outstanding
sweat‐wicking
effect
high‐performance
sweat
capacity.
In
steady‐state
evaporation
tests,
maximum
consumption
only
0.5
ml
h
−1
to
temperature,
preventing
harmful
excessive
sweating.
Additionally,
also
possesses
favorable
wearability
color
expansibility.
Given
these
first‐rate
features,
will
pave
way
development
advanced
functional
fabrics.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 12, 2025
Recent
advancements
in
radiative
cooling
technologies
have
highlighted
their
potential
as
sustainable
and
environmentally
friendly
solutions.
However,
while
this
method
offers
significant
energy
savings
during
hot
seasons,
it
may
incur
losses
(overcooling
leads
to
a
waste
of
energy)
colder
conditions.
The
current
solution
has
the
problems
complex
process
or
easy
leakage
materials.
To
address
challenge,
we
synthesized
SiO2
nanohybrid
(a
nanoparticle
with
elongated
polymer
chains
grafted
onto
its
surface),
which
modifies
thermoresponsive
behavior
composites.
Upon
incorporation
these
nanohybrids
into
matrix,
will
display
morphological
changes
response
temperature
variations,
leading
emissivity
resulting
composite
film.
What's
more,
reflectivity
film
was
enhanced
from
57.26
89.37%,
increasing
performance
by
4
°C
weather.
Results
confirmed
that
maintained
structural
integrity
without
leakage,
demonstrating
robust
durability.
Overall,
work
offer
valuable
insights
for
advancing
applications.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(33), С. 21490 - 21514
Опубликована: Янв. 1, 2024
A
critical
review
of
the
regulatory
mechanisms,
structural
design,
cooling
performance,
and
applications
hybrid
to
advance
its
commercial
use
in
passive
cooling.
Macromolecular Materials and Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 27, 2025
Abstract
The
interfacial
aspects
of
fiber
composites
are
widely
favored.
Here,
three
composite
strategies
based
on
hot‐pressing,
electrospinning,
and
impregnation
PA6
fibers
presented
for
the
preparation
fiber‐reinforced
thermoplastic
polyurethane
(PA6/TPU)
composites.
morphologies
electrospun
fiber/matrix
interface
mechanical
properties
PA6/TPU
investigated.
Under
optimal
conditions,
tensile
strength,
Young's
modulus,
toughness
H‐PA6/TPU
respectively
29.45
±
1.477
MPa,
47.28
2.61
38.03
1.996
MJ
m
−3
.
E‐PA6/TPU
28.03
1.411
73.81
4.16
24.12
1.265
,
respectively.
I‐PA6/TPU
elongation
at
break
is
≈240%.
Moreover,
without
loss
TPU
properties,
method
effectively
improves
adhesion
between
matrix,
significantly
improved
even
if
content
low.
simple
to
operate
can
be
extended
other
polymers
Applied Physics Letters,
Год журнала:
2025,
Номер
126(11)
Опубликована: Март 1, 2025
Passive
solar
heating
and
radiative
cooling
attracted
lots
of
attention
in
global
energy
consumption
reduction
due
to
their
unique
electricity-free
advantage.
However,
static
single
radiation
or
would
lead
over-cooling
over-heating
cold
hot
weather,
respectively.
How
achieve
effective
self-adaptive
thermoregulation
is
critical
for
dynamic
thermal
management.
Hence,
this
work,
a
strategy
was
designed
by
coupling
latent
heat
storage
release
with
reversible
cooling.
A
commercial
memory
alloy
could
realize
at
the
temperature
between
high
reflectance
R¯solar
=
0.95
emittance
ε¯LWIR
0.93,
absorptance
α¯solar
0.92
low
ε¯IR
0.08.
High
conductive
phase
change
material
further
improve
performance
∼136
J
g−1,
conductivity
3.4
W
m−1
K−1,
resulting
superior
than
(39.9
vs
36.9
°C)
(33.8
35.5
°C).
The
maximum
increase
be
12.7
°C
situation,
drop
8.3
situation.
Energy
calculation
showed
that
sample
save
68%–90%
annual
compared
common
roof,
indicating
spectral
regulation
can
greatly
total
