Abstract
Solar
thermal
collectors
based
on
phase
change
materials
(PCMs)
are
important
to
promote
the
civilian
use
of
sustainable
energy.
However,
simultaneously
achieving
high
photothermal
efficiency
and
rapid
heat
transfer
PCM
carrier
typically
involves
a
proportion
functional
materials,
contradicting
satisfying
energy
storage
density.
In
this
work,
surface‐engineered
anisotropic
MXene‐based
aerogel
(LMXA)
integrated
with
myristic
acid
(MA)
produce
composites
(LMXA‐MA)
is
reported,
in
which
laser‐treated
surface
composed
hierarchically‐structured
TiO
2
/carbon
act
as
light
absorber
improve
solar
absorption
(96.0%),
while
vertical
through‐hole
structure
allows
for
fast
transportation
from
whole.
As
result,
LMXA‐MA
exhibits
outstanding
(192.4
J·g
−1
)
conversion
(93.5%).
Meanwhile,
benefiting
intrinsic
low
emissivity
MXene
material,
radiation
loss
can
be
effectively
suppressed
by
simply
flipping
LMXA‐MA,
enabling
long‐term
temperature
control
ability
(605
s·g
).
The
excellent
property
switchable
dual‐mode
also
endow
it
an
infrared
stealth
function,
maintains
camouflage
more
than
240
s.
This
work
provides
prospective
solution
optimizing
preservation
engineering
structural
design.
With
the
development
of
electronic
equipment
and
advancement
environmental
camouflage
technology,
higher
requirements
are
placed
on
flexibility,
thermal
conductivity,
heat
storage
capacity
phase
change
films.
This
work
fabricated
a
high-performance
dual-encapsulation
composite
film
through
employment
Pickering
emulsion
polymerization
sol-gel
techniques,
incorporating
n-octadecane
(n-OD),
liquid
metal
gallium
(Ga),
poly(p-phenylene
benzobisoxazole)
(PBO).
Phase
microcapsules
(PM)
serve
to
prevent
leakage
during
changes,
maintain
high
levels
enthalpy,
enhance
dispersion
n-OD
in
matrices,
as
well
improve
adhesion
at
interfaces.
It
is
possible
achieve
excellent
conductivity
with
only
small
amount
modified
Ga
(MGa)
by
chitosan
quaternary
ammonium
salt
confined
network
since
material
has
smaller
size
more
uniform
distribution.
Owing
its
distinctive
structural
design
modification
strategy,
(MGa/PM/PBO)
manifests
outstanding
mechanical
properties
(featuring
tensile
strength
7.0
MPa),
remarkable
(9.4752
W
m-1
K-1)
in-plane),
(100.9
J
g-1).
harbors
significant
potential
for
application
management
devices
camouflage.
