Aerogels
have
provided
a
significant
platform
for
passive
radiation-enabled
thermal
regulation,
arousing
extensive
interest
due
to
their
capabilities
of
radiative
cooling
or
heating.
However,
there
still
remains
challenge
developing
functionally
integrated
aerogels
sustainable
regulation
in
both
hot
and
cold
environment.
Here,
Janus
structured
MXene-nanofibrils
aerogel
(JMNA)
is
rationally
designed
via
facile
efficient
way.
The
achieved
presents
the
characteristic
high
porosity
(≈98.2%),
good
mechanical
strength
(tensile
stress
≈2
MPa,
compressive
≈115
kPa),
macroscopic
shaping
property.
Based
on
asymmetric
structure,
JMNA
with
switchable
functional
layers
can
alternatively
enable
heating
winter
summer,
respectively.
As
proof
concept,
function
as
thermal-regulated
roof
effectively
inner
house
model
maintain
>25
°C
<30
summer.
This
design
compatible
expandable
promising
widely
benefit
low-energy
changeable
climate.
Science,
Год журнала:
2021,
Номер
374(6574), С. 1501 - 1504
Опубликована: Дек. 16, 2021
Radiative
cooling
materials
spontaneously
radiate
long-wave
infrared
(LWIR)
to
the
cold
outer
space,
providing
power
that
is
preferred
in
hot
seasons.
has
been
widely
explored
for
walls
and
roofs
but
rarely
windows,
which
are
one
of
least
energy-efficient
parts
buildings.
We
fabricated
scalable
smart
windows
using
a
solution
process
giving
different
emissivity
(ε)
at
high
(εLWIR-H
0.61)
low
(εLWIR-L
0.21)
temperatures
regulate
radiative
automatically
while
maintaining
luminous
transparency
near-infrared
(NIR)
modulation.
These
passive
independent
visible–NIR–LWIR
regulated
capable
dynamic
self-adapting
applications
across
climate
zones.
Adaptive
control
of
solar
and
thermal
radiation
through
windows
is
pivotal
importance
for
building
energy
saving.
However,
such
synchronous
passive
regulations
are
challenging
to
be
integrated
into
one
thermochromic
window.
Here,
we
develop
a
regulatory
(STR)
window
by
integrating
poly(
N
-isopropylacrylamide)
(pNIPAm)
silver
nanowires
(AgNWs)
pNIPAm/AgNW
composites.
A
hitherto
unexplored
mechanism,
originating
from
the
temperature-triggered
water
capture
release
due
pNIPAm
phase
transition,
exploited
achieve
simultaneous
transmission
emission.
The
STR
shows
excellent
modulation
(58.4%)
(57.1%)
demonstrates
effective
regulation
indoor
temperatures
during
both
daytime
nighttime.
Compared
other
technologies,
reduces
heat
loss
in
cold
environment
while
promotes
dissipation
hot
conditions,
achieving
efficient
saving
all
weathers.
This
dual
mechanism
may
provide
unidentified
insights
advancement
smart
technology.
Advanced Materials,
Год журнала:
2021,
Номер
33(42)
Опубликована: Сен. 2, 2021
Development
and
understanding
of
antifreezing
materials
are
fundamentally
practically
important
for
design
delivery.
However,
almost
all
either
organic/icephobic
containing
no
water
or
hydrophilic
hydrogels
additives.
Here,
a
general
crosslinking
strategy
to
fabricate
family
EGINA-crosslinked
double-network
with
intrinsic,
built-in
mechanical
properties,
but
without
any
additives
is
proposed
demonstrated.
The
resultant
hydrogels,
despite
large
structural
compositional
variations
hydrophilies,
electrolytes,
zwitterions,
macromolecules
polymer
chains,
achieved
strong
properties
in
different
environments
including
solution
state,
gel
hydrogel/solid
interfaces.
Such
property
regardless
network
compositions,
likely
stemmed
from
their
highly
tightly
crosslinked
DN
structures
inducing
water-network
bindings
prevent
ice
crystal
formation
free
waters
hydrogel
networks.
can
also
serve
as
key
component
be
fabricated
into
smart
windows
high
optical
transmittance
supercapacitors
excellent
electrochemical
stability
at
subzero
temperatures.
This
work
provides
simple,
blueprint
concept
the
better
composite-structure-property
relationship
fundamentals
confined
wet
soft
materials.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Июнь 3, 2023
Smart
window
is
an
attractive
option
for
efficient
heat
management
to
minimize
energy
consumption
and
improve
indoor
living
comfort
owing
their
optical
properties
of
adjusting
sunlight.
To
effectively
the
sunlight
modulation
capability
smart
windows,
here,
we
propose
a
co-assembly
strategy
fabricate
electrochromic
thermochromic
windows
with
tunable
components
ordered
structures
dynamic
regulation
solar
radiation.
Firstly,
enhance
both
illumination
cooling
efficiency
in
aspect
ratio
mixed
type
Au
nanorods
are
tuned
selectively
absorb
near-infrared
wavelength
range
760
1360
nm.
Furthermore,
when
assembled
W18O49
nanowires
colored
state,
exhibit
synergistic
effect,
resulting
90%
reduction
light
corresponding
5
°C
effect
under
1-sun
irradiation.
Secondly,
extend
fixed
response
temperature
value
wider
30-50
doping
amount
W-VO2
carefully
regulated.
Last
but
not
least,
assembly
structure
can
greatly
reduce
level
haze
visibility
windows.
Advanced Functional Materials,
Год журнала:
2021,
Номер
32(5)
Опубликована: Окт. 20, 2021
Abstract
Conventional
buildings
consume
about
40%
of
global
energy,
smart
window
technologies
have
been
developed
for
sunlight
modulation
and
energy
management.
Most
current
windows
change
from
transparent
to
opaque
as
the
temperature
rises,
which
is
detrimental
indoor
lighting
at
daytime
or
privacy
protection
night.
In
this
work,
a
versatile
thermochromic
hydrogel
system
by
introducing
sodium
dodecyl
sulfate
(SDS)
micelles
into
crosslinked
copolymer
hydrophilic
acrylamide
hydrophobic
stearyl
methacrylate
(C
18
)
developed.
The
liquid
precursor
solution
can
be
encapsulated
within
two
glass
panels
in
situ
gelated
prepared
windows,
showed
excellent
solar
ability
(
T
lum
=
99.05%,
D
33.42%),
dual
responsiveness
(thermal
pH)
tunable
phase
transition
(20–50
°C).
Moreover,
design
selectively
blocks
infrared
light,
while
allowing
ultraviolet
visible
light
through
daytime,
beneficial
illumination
heat
insulation.
When
drops
night,
C
units
aggregate
SDS
increase
their
dimensions,
causing
enhanced
blocking
properties
(opaque)
protect
customers’
privacy.
as‐prepared
hydrogel‐based
present
facile
strategy
meet
stringent
requirements
high
transparency,
ability,
easy
fabricate
mechanical
flexibility,
holding
great
promise
next‐generation
energy‐saving
buildings.
Chemical Reviews,
Год журнала:
2023,
Номер
123(11), С. 7025 - 7080
Опубликована: Апрель 13, 2023
Thermochromic
energy
efficient
windows
represent
an
important
protocol
technology
for
advanced
architectural
with
energy-saving
capabilities
through
the
intelligent
regulation
of
indoor
solar
irradiation
and
modulation
window
optical
properties
in
response
to
real-time
temperature
stimuli.
In
this
review,
recent
progress
some
promising
thermochromic
systems
is
summarized
from
aspects
structures,
micro-/mesoscale
properties,
integration
other
emerging
techniques.
Furthermore,
challenges
opportunities
energy-efficient
are
outlined
promote
future
scientific
investigations
practical
applications
building
conservation.
Cell Reports Physical Science,
Год журнала:
2023,
Номер
4(5), С. 101370 - 101370
Опубликована: Апрель 6, 2023
Thermochromic
and
electrochromic
smart
windows
are
increasingly
receiving
attention
for
their
specific
ability
to
regulate
the
dynamics
of
light
heat.
The
goal
improving
smart-window
materials
is
chiefly
achieve
building
applications.
This
paper
reviews
progress
existing
material
technologies
summarizes
experiments
simulations
related
buildings.
To
facilitate
leap
from
building,
concept
performance
regulation
ideal
proposed,
applicability
distribution
mapped.
Based
on
completely
different
core
logic
thermochromic
windows,
discrepancies
consistencies
between
two
discussed.
Performance
requirements
in
buildings
proposed.
Bridging
gap
interdisciplinary
promotion
key
further
exploration
potential
application
accelerating
applications
future.
ACS Energy Letters,
Год журнала:
2021,
Номер
6(11), С. 3906 - 3915
Опубликована: Окт. 14, 2021
Electrochromic
devices
are
a
key
technology
to
modulate
optical
and
thermal
energy
for
zero-energy
buildings.
With
the
sun
as
heat
source
deep
space
cold
source,
it
would
be
beneficial
accomplish
wideband
regulation
control
both
solar
radiative
simultaneously
obtain
large
heating
cooling
performance.
Here,
flexible
ultra-wideband
transparent
conducting
electrode
(UWB-TCE)
with
low
sheet
resistance
(Rs
=
22.4
ohm/sq)
high
transmittance
(TUV–vis
85.63%,
Tnear-IR
87.85%,
Tmid-IR
84.87%)
has
been
demonstrated
realize
an
electrochromic
device
that
is
capable
of
synergistic
management.
Enabled
by
UWB-TCE,
metal-based
can
vary
its
emissivity
between
0.12
0.94.
The
also
switch
mode
(high
absorptivity
emissivity)
(low
controlling
optimal
electrodeposition
morphology
surface
plasmon
resonance.
(α)
(ε)
(α,
ε)
(0.60,
0.20)
(0.33,
0.94),
respectively.
UWB-TCE
dual-band
mid-IR
bring
vast
opportunities
applications
in
management,
camouflage,
display,
building
efficiency.
