RSC Advances,
Journal Year:
2023,
Volume and Issue:
13(45), P. 31738 - 31755
Published: Jan. 1, 2023
Thermal
management,
including
heating
and
cooling,
plays
an
important
role
in
human
productive
activities
daily
life.
Nevertheless,
the
actual
environment,
almost
all
ambient
scenarios
come
with
challenge
that
objects
are
located
a
quite
dynamic
variable
which
includes
fluctuations
aspects
such
as
space,
time,
sunlight,
season,
temperature.
It
is
imperative
to
develop
low-energy
or
even
zero-energy
thermal-management
technologies
renewable
clean
energy.
In
this
review,
we
summarised
latest
technological
advances
prospects
burgeoning
field.
First,
present
fundamental
principles
of
daytime
passive
radiative
cooling
(PDRC)
thermal
management
device.
Next,
domain
dual-mode
systems,
they
classified
into
various
types
based
on
diverse
mechanisms
transitioning
between
states,
electrical
responsive,
mechanical
temperature
solution
responsive.
Furthermore,
conducted
in-depth
analysis
design
methodologies
associated
these
categories,
followed
by
comparative
assessment
their
performance
solar
applications.
Finally,
review
presents
challenges
opportunities
dual
mode
while
also
identifying
future
directions.
Electropolymerized
polypyrrole
(PPy)
is
considered
as
one
of
the
promising
polymers
for
use
in
ionic-electroactive
or
conducting
polymer
(CP)
actuators.
Its
electromechanical
properties
surpass
those
other
prominent
CPs
such
poly(3,4-ethylenedioxythiophene)
polystyrene
sulfonate
(PEDOT/PSS)
polyaniline.
However,
freestanding
and
linear
contracting
actuator
fibers
made
solely
electropolymerized
PPy
are
not
available
yet.
This
work
therefore
targets
development
all-CP-based
fibers:
electromechanically
active
on
surface
wet-spun,
also
PEDOT/PSS
fibers.
The
thickness
fiber
sheath
varied
by
using
different
electropolymerization
durations.
Mechanical
actuation
PEDOT/PPy
core-sheath
investigated
via
tensile
tests
isotonic
strain
isometric
force
measurements,
respectively.
actuators
show
high
stability
both
dry
aqueous
conditions,
rendering
them
highly
suitable
electrolyte
media.
Regarding
linear,
untwisted,
uncoiled
CP
actuators,
presented
measurements
demonstrate
to
best
our
knowledge
highest
reported
contractile
strains
up
2.2%
electrolytes
remarkable
stresses
1.64
MPa,
well
a
long-term
cyclic
varying
renders
material,
particularly
with
regard
their
further
structural
textile
processing
actuating
wearables
soft
robots.
Machines,
Journal Year:
2025,
Volume and Issue:
13(2), P. 92 - 92
Published: Jan. 24, 2025
Despite
the
significant
engineering
applications
of
vibration
isolation
structures,
there
remain
challenges
in
adjusting
low-frequency
performance.
To
tackle
this
issue,
study
proposes
a
temperature-controlled
quasi-zero
stiffness
structure
utilizing
NiTi
shape
memory
alloys.
The
and
performance
can
be
adjusted
by
modifying
heat
treatment
process
temperature
variations
alloy.
system
is
composed
vertical
horizontal
alloy
beams,
with
structural
mechanics
analysis
performed
to
develop
both
static
dynamic
theoretical
models.
investigates
effects
on
phase
transition
characteristics
mechanical
properties
nickel-titanium
alloys,
analyzes
correlation
between
parameters
beams
structures.
By
applying
entire
dynamically
adjusted.
This
research
provides
guidance
for
achieving
adjustable
across
wide
ranges,
offering
promising
prospects
application
structures
environments.
Macromolecular Rapid Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 27, 2025
Abstract
4D
printing,
which
combines
the
design
freedom
of
3D
printing
with
responsiveness
smart
materials,
is
revolutionizing
creation
active
structures.
These
structures
can
change
shape
in
response
to
external
stimuli,
paving
way
for
advancements
robotics,
biomedicine,
and
beyond.
However,
a
comprehensive
review
article
highlighting
recent
printed
memory
actuators
(SMAAs)
lacking.
This
explores
exciting
potential
intelligent
SMAAs.
It
examines
concept
materials
used,
like
shape‐memory
polymers
(SMPs),
alloys
(SMAs),
polymer
composites
(SMPCs).
then
dives
into
compatible
techniques
principles
achieving
programmed
changes.
Different
categories
SMAAs
are
explored,
showcasing
their
applications
diverse
fields.
The
concludes
by
discussing
challenges
future
directions,
emphasizing
massive
creating
next
generation
actuators,
making
it
valuable
resource
researchers
field.
National Science Review,
Journal Year:
2024,
Volume and Issue:
11(10)
Published: July 5, 2024
ABSTRACT
This
review
systematically
explores
the
inherent
structural
advantages
of
fiber
over
conventional
film
or
bulk
forms
for
artificial
muscles,
emphasizing
their
enhanced
mechanical
properties
and
actuation,
scalability,
design
flexibility.
Distinctive
merits
electrically
powered
muscle
actuation
mechanisms,
including
electrothermal,
electrochemical
dielectric
are
highlighted,
particularly
operational
efficiency,
precise
control
capabilities,
miniaturizability
seamless
integration
with
electronic
components.
A
comprehensive
overview
significant
research
driving
performance
enhancements
in
fibers
through
materials
innovations
is
provided,
alongside
a
discussion
diverse
methodologies
that
have
emerged
this
field.
detailed
comparative
assessment
evaluates
metrics,
manufacturing
complexities
each
mechanism,
underscoring
suitability
various
applications.
Concluding
strategic
outlook,
identifies
key
challenges
proposes
targeted
directions
to
advance
refine
technologies.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(9)
Published: Jan. 15, 2024
Abstract
Liquid
crystal
actuators
conventionally
undergo
shape
changes
across
an
order‐disorder
phase
transition
between
liquid
(LC)
and
isotropic
phases.
In
this
study,
we
introduce
innovative
Crystal
Polymer
(LCP)
actuator
harnessing
order‐order
LC
mechanism.
The
LCP
film
is
easily
stretchable
within
the
phase,
facilitated
by
π–π
stacking
of
phenyl
groups
serving
as
robust
physical
crosslinking
points,
thereby
transforms
to
a
stable
monodomain
structure.
resultant
shows
distinctive
reversible
dynamic
change,
exhibiting
extension
followed
contraction
along
director
on
cooling.
propelled
smectic
C
A
transition,
attributed
re‐entry
from
phase.
Thermal
annealing
temperature
determines
peculiar
which
occurs
during
both
heating
cooling
processes.
This
pivotal
attribute
finds
manifestation
in
gripper
flower‐shaped
actuators,
adeptly
executing
grabbing
releasing
well
blooming
closure
motions
single
thermal
stimulation.
essence,
our
study
introduces
approach
realm
ushering
new
avenue
for
design
fabrication
versatile
dynamically
responsive
actuators.
