Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 13, 2024
Abstract
Water
constitutes
a
huge
circulation
network
in
solid,
liquid
and
gaseous
forms
that
contains
inestimable
recyclable
energy.
Obtaining
energy
from
moisture
is
challenging
but
of
great
significance
to
promote
the
upgrading.
The
emergence
moisture‐driven
actuator
(MDA)
provides
an
effective
way
converting
mechanical
MDA
can
combine
with
water
molecules
through
hygroscopicity
swell
produce
macroscopic
deformation.
Due
wide
distribution
humidity
wireless
driving
mode,
shows
application
potential
fields
environmental
monitoring,
remote
control
harvesting.
This
paper
comprehensively
reviews
research
progress
aspects
hydrophilic
materials,
structures,
preparing
methods,
multi‐response
integration
applications,
aiming
at
providing
guidance
for
design,
preparation
MDA.
Besides,
challenges
faced
by
are
analyzed
corresponding
solutions
proposed,
which
points
out
next
stage
developing
direction
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(23)
Published: March 23, 2024
Abstract
Self‐oscillation
phenomena
observed
in
nature
serve
as
extraordinary
inspiration
for
designing
synthetic
autonomous
moving
systems.
Converting
self‐oscillation
into
designable
self‐sustained
locomotion
can
lead
to
a
new
generation
of
soft
robots
that
require
minimal/no
external
control.
However,
such
is
typically
constrained
single
mode
dictated
by
the
constant
surrounding
environment.
In
this
study,
liquid
crystal
elastomer
(LCE)
robot
capable
achieving
multimodal
locomotion,
with
specific
motion
being
controlled
via
substrate
adhesion
or
remote
light
stimulation
presented.
Specifically,
LCE
mechanically
trained
undergo
repeated
snapping
actions
ensure
its
rolling
gradient
thermal
field
atop
hotplate.
By
further
fine‐tuning
adhesion,
exhibits
reversible
transitions
between
and
jumping
modes.
addition,
be
manipulated
real
time
through
perform
other
diverse
motions
including
turning,
decelerating,
stopping,
backing
up,
steering
around
complex
obstacles.
The
principle
introducing
an
on‐demand
gate
control
offers
venue
future
robots.
Journal of Applied Mechanics,
Journal Year:
2024,
Volume and Issue:
91(10)
Published: June 14, 2024
Abstract
Recent
experiments
have
found
that
a
fiber-mass
system
can
self-oscillate
along
the
vertical
direction
under
non-uniform
temperature
field,
which
necessitates
significant
space.
To
address
challenge
in
adapting
to
situations
with
limited
space,
current
work
introduces
self-oscillating
string-mass
system,
comprising
of
mass
ball
and
thermally
responsive
liquid
crystal
elastomer
string
exposed
constant
gradient
temperature.
By
employing
theoretical
modeling
numerical
simulation,
we
identified
two
motion
regimes
namely,
static
regime
self-oscillation
regime,
elucidated
mechanism
self-oscillation.
Utilizing
analytical
method,
derived
expressions
for
bifurcation
point,
amplitude,
frequency
self-oscillation,
investigated
impact
parameters
on
these
aspects,
were
verified
by
solutions.
Compared
has
superior
stability
deal
small
horizontal
disturbances,
amplify
its
amplitude
thermal
deformation
material,
saves
amount
Given
attributes,
such
presents
novel
possibilities
designing
energy
harvesters,
active
machinery,
soft
robots.
The
quest
for
small-scale,
remotely
controlled
soft
robots
has
led
to
the
exploration
of
magnetic
and
optical
fields
inducing
shape
morphing
in
materials.
Magnetic
stimulus
excels
when
navigation
confined
or
optically
opaque
environments
is
required.
Optical
stimulus,
turn,
boasts
superior
spatial
precision
individual
control
over
multiple
objects.
Herein,
we
bring
these
two
methodologies
together
present
a
monolithic
liquid
crystal
elastomer
(LCE)
system
that
synergistically
combines
photochemical
actuation
schemes.
resultant
composite
material
showcases
versatile
possibilities
underwater
actuation,
demonstrate
robotic
functionalities
where
response
can
be
leveraged
different
tasks
(object
gripping
object
translocation,
respectively)
light
used
as
signal
tune
magnetically
induced
actuation.
Combining
remote
methods
offers
powerful,
dual-mode
wireless,
small-scale
robotics,
especially
submersed
due
their
isothermal
nature.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 17, 2024
Abstract
A
simple
one‐step
approach
is
presented
to
fabricate
high
strength
and
tough
ionogels
by
copolymerizing
zwitterionic
monomers
rich
in
functional
groups
capable
of
forming
hydrogen
bonds
within
an
ionic
liquid.
The
electrostatic
adsorption
liquid
the
polyzwitterionic
segment
induces
formation
a
bicontinuous
phase
network
structure
consisting
polymer‐rich
solvent‐rich
phase.
Within
this
structure,
with
dissipates
energy
enhances
toughness
ionogel,
while
elastic
facilitates
significant
strain.
prepared
exhibit
fracture
(8.89
MPa),
(41.12
MJ
m
−3
),
Young's
modulus
(58.9
MPa).
critical
point
for
triggering
can
be
precisely
controlled
maximum
capacity
Ionogels
at
demonstrate
excellent
fatigue
resistance,
residual
strain
only
≈25%
under
50%
250%
conditions,
recovering
their
original
state
5
s.
Due
widespread
presence
interactions,
strategy
constructing
exhibits
adaptability
across
different
systems.
