Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Май 20, 2025
Abstract
Daytime
radiative
cooling
is
an
eco-friendly
and
passive
technology
that
operates
without
external
energy
input.
Materials
designed
for
this
purpose
are
engineered
to
possess
high
reflectivity
in
the
solar
spectrum
emissivity
within
atmospheric
transmission
window.
Unlike
broadband-emissive
daytime
materials,
spectrally
selective
(SSDRC)
materials
exhibit
predominant
mid-infrared
emission
This
suppresses
thermal
radiation
absorption
beyond
window
range,
thereby
improving
net
power
of
cooling.
review
elucidates
fundamental
characteristics
SSDRC
including
their
molecular
structures,
micro-
nanostructures,
optical
properties,
thermodynamic
principles.
It
also
provides
a
comprehensive
overview
design
fabrication
three
typical
forms,
i.e.,
fibrous
membranes,
particle
coatings,
highlighting
respective
mechanisms
performance.
Furthermore,
practical
applications
personal
management,
outdoor
building
cooling,
harvesting
summarized.
Finally,
challenges
prospects
discussed
guide
researchers
advancing
materials.
"Image
missing"
Passive
daytime
radiative
cooling
(PDRC)
is
a
new
thermal
management
solution
that
does
not
rely
on
external
energy
sources.
Traditional
PDRC
materials
have
relatively
high
thickness
(typically
500-800
μm),
which
prevents
efficient
and
limits
their
application
scenarios.
To
address
this
challenge,
we
propose
bilayer
porous
structure
meets
the
needs
of
different
scenarios
(both
below-ambient
above-ambient
temperatures).
This
formed
through
synergistic
assembly
inorganic
dielectric
particles
using
natural
sedimentation
phase
separation
techniques,
addressing
conflict
between
performance
material
thickness.
Due
to
structure,
coatings
exhibit
sufficient
solar
reflectance
(98.59
±
0.71%),
atmospheric
emissivity
(95.15
0.53%),
conductivity
(1.203
W·m-1·K-1)
with
only
220
15
μm.
Field
tests
demonstrate
4.25
°C
15.67
under
intense
radiation,
while
coating
exhibits
impressive
durability
efficiency.
work
provides
novel
construction
strategy,
showing
great
potential
advance
energy-free
toward
real-world
applications.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 12, 2025
Superhydrophobic
passive
cooling
materials
offer
a
promising
solution
to
reduce
energy
consumption
during
extremely
hot
days
due
their
self-cleaning
properties,
which
prevent
dust
contamination
and
extend
lifetime.
However,
achieving
comprehensive
performance,
including
mechanical
durability,
resistance
strong
acid/alkali
corrosion,
thermal
stability,
UV
radiation
tolerance,
remains
significant
challenge.
Herein,
durable
superhydrophobic
film
exhibiting
remarkable
superhydrophobicity
against
the
above
conditions
for
daytime
water
harvesting
was
prepared
based
on
UV-cure
3D
printing
postpainting
modification.
The
obtained
showed
outstanding
properties
even
after
being
immersed
in
aqueous
solutions
with
pH
values
of
2-12
24
h.
Compared
ambient
air,
results
demonstrated
that
achieved
maximum
temperature
reduction
approximately
21
°C,
successfully
reduced
roof
wooden
house
model.
Additionally,
exhibited
capabilities
collection
rate
2018.5
±
84.9
mg
cm-2
h-1.
Overall,
this
work
not
only
introduces
straightforward
method
prepare
films
but
also
offers
innovative
addressing
scarcity
challenges.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 14, 2025
The
development
of
multifunctional
cooling
textiles
has
become
crucial
in
addressing
global
warming
and
the
increasing
need
for
personal
thermal
management.
Developing
with
integrated
unidirectional
moisture
transport
radiative
functionalities
through
a
simple
fabrication
method
critical
challenge
management
under
high-temperature
conditions.
This
study
presents
moisture-wicking
textile
(RCUM-Textile)
one-step
phase
separation
method.
By
employing
evaporation-induced
(EIPS)
non-solvent-induced
(NIPS)
mechanisms,
RCUM-Textile
achieves
trilayer
structure
comprising
hydrophobic
SiO2/PVDF-HFP
upper
layer
hydrophilic
cotton
lower
layer.
innovative
integrates
efficient
sweat
evaporation,
enabling
solar
reflectance
89.7%,
mid-infrared
emissivity
94.9%,
effect
8.7°C
direct
sunlight.
solution,
utilized
as
finishing
agent,
simplifies
functionalization
process,
ensuring
uniform
coating
structural
stability
while
reducing
processing
complexity.
Additionally,
its
enhanced
evaporation
rate
(0.029
g·m-2·s-1)
reduced
enthalpy
(2084
J/g)
significantly
improve
regulation
wearer
comfort.
provides
cost-effective
practical
approach
to
fabricating
high-performance
textiles,
paving
way
applications
devices,
wearable
electronics,
industrial-scale
systems.
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Май 20, 2025
Abstract
Daytime
radiative
cooling
is
an
eco-friendly
and
passive
technology
that
operates
without
external
energy
input.
Materials
designed
for
this
purpose
are
engineered
to
possess
high
reflectivity
in
the
solar
spectrum
emissivity
within
atmospheric
transmission
window.
Unlike
broadband-emissive
daytime
materials,
spectrally
selective
(SSDRC)
materials
exhibit
predominant
mid-infrared
emission
This
suppresses
thermal
radiation
absorption
beyond
window
range,
thereby
improving
net
power
of
cooling.
review
elucidates
fundamental
characteristics
SSDRC
including
their
molecular
structures,
micro-
nanostructures,
optical
properties,
thermodynamic
principles.
It
also
provides
a
comprehensive
overview
design
fabrication
three
typical
forms,
i.e.,
fibrous
membranes,
particle
coatings,
highlighting
respective
mechanisms
performance.
Furthermore,
practical
applications
personal
management,
outdoor
building
cooling,
harvesting
summarized.
Finally,
challenges
prospects
discussed
guide
researchers
advancing
materials.
"Image
missing"
