Phase
change
fibers
(PCFs)
are
increasingly
popular
in
thermal
storage
and
release
applications,
such
as
temperature
management.
However,
a
simple
but
effective
integration
of
conductive
materials
into
PCFs
to
deliver
ultrafast
conduction
remains
big
challenge.
Herein,
facile
one-pot
coaxial
wet
spinning
strategy
based
on
sheath-confinement-induced
orientation
arrangement
hydroxylated
boron
nitride
nanosheets
(BNNs-OH)
is
proposed
fabricate
the
high-performance
PCFs.
For
core-sheath
PCFs,
cellulose
nanofiber
(CNF)-reinforced
paraffin
(CNF/PW)
emulsions
serve
phase
core,
while
dissolved
well-dispersed
BNNs-OH
act
sheath
precursor.
By
increasing
extrusion
speed
liquid
contraction
fiber
gradually
finalized
induce
alignment
confinement
effect.
Consequently,
highly
oriented
(f
=
0.8)
endow
with
high
transition
enthalpy
(125.1
J
g-1),
excellent
conductivity
(10.15
W
m-1K-1),
rapid
heat
transfer
rate
(1.6
cm
s-1);
moreover,
as-prepared
show
good
tensile
strength
(11.21
MPa)
leakage-proof
(0.13%).
The
combined
thermochromic
dyes
for
functional
fabrics
or
applied
management
phone,
demonstrating
dissipation.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(23)
Опубликована: Фев. 12, 2024
Abstract
Due
to
the
unique
thermal
absorption
and
release
capabilities,
phase‐change
materials
(PCMs)
are
used
in
various
industrial
fields,
such
as
photo‐thermal
storage
building‐energy
saving.
In
recent
years,
more
research
has
been
dedicated
applying
PCMs
medical
field
with
substantial
progress,
opening
new
avenues
for
disease
treatment
healthcare.
The
safety
reliability
of
may
be
taken
into
serious
consider
continuous
application
field,
while
relevant
review
on
related
development
is
currently
lacking.
this
work,
methods
enhancing
applicability
systematically
summarized,
including
microencapsulation,
electrospinning
technology,
porous
framework
encapsulation,
which
effectively
address
issues
liquid
leakage.
Subsequently,
emerging
advances
healthcare,
dressings
treatment,
drug
delivery,
cold
chain
transport,
bio‐bone
cement
summarized.
By
exploring
analyzing
encapsulation
methods,
principles
well
challenges
perspectives
promoting
applications
identified,
presenting
guidelines
further
development.
Thermal Science and Engineering Progress,
Год журнала:
2024,
Номер
48, С. 102401 - 102401
Опубликована: Янв. 13, 2024
The
low
thermal
conductivity
of
phase
change
materials
(PCMs)
has
limited
their
widespread
use
in
practical
applications.
In
the
present
study,
different
fin
structures,
namely,
rectangular,
perforated,
and
pin
were
examined
to
analyze
performance
melting
process
rectangular
latent
heat
storage
tanks.
Experiments
performed
at
both
horizontal
vertical
orientations
evaluate
effectiveness
configurations.
Visual
observation
evolution
time
intervals
was
enabled
through
a
transparent
plexiglass
shell.
Instantaneous
transfer
rate
energy
measured
using
thermocouple
readings
photographs.
results
show
that
maximum
coefficient
between
heated
wall
PCM
is
obtained
by
pin-finned
tank
followed
perforated
rectangular-finned
This
behavior
justified
intensification
upward
convection
flows
voids
provided
fins
or
fins.
Although
structure
lowest
convective
coefficient,
its
slightly
higher
than
other
structures
due
larger
area.
At
temperature
70℃,
configuration
are
respectively
25%
4%
less
those
fin.
It
reveals
provides
most
effective
area
compared
counterparts
which
have
significantly
volume.
addition,
it
found
regardless
configuration,
formation
more
vortical
flow
within
molten
PCM.
unfinned
finned
tanks
implying
orientation
should
be
well-chosen
minimize
along
with
adding
various
Nanotechnology Reviews,
Год журнала:
2023,
Номер
12(1)
Опубликована: Янв. 1, 2023
Abstract
The
application
of
micro-/nano-capsules
in
construction
industries
has
been
rising
over
the
past
decade.
Polyurea
with
tunable
chemical
and
morphological
structure
are
interesting
polymers
to
prepare
used
construction.
polyurea
micro-/nano-capsule
is
capable
be
tailored
via
bulk
emulsion
or
microfluidic
method.
Important
factors
for
production
micro/nano-capsules
rate
fabrication
having
control
mean
size,
dispersity,
wall
thickness.
method
provides
higher
yield
less
sizes
dispersity
comparison
technique.
main
applications
categorized
as
thermal
energy
saving,
self-healing
concrete,
polymers,
fire
retarding.
showed
appropriate
conductivity
mechanical
properties
which
required
encapsulation
phase
change
materials.
Titanium
dioxide
microcapsules
possess
storage
efficiency
77.3%
capacity
99.9%.
sodium
silicate
cargo
provided
abilities
oil
well
cement
high
temperature
compared
gelatin
microcapsules.
Graphene
oxide
demonstrated
62.5%
anti-corrosive
epoxy
coating,
steel
coated
dendritic
embedded
polyurethane
remained
unchanged
after
long
time
immersion
salt
water.
