National Science Open,
Год журнала:
2024,
Номер
unknown, С. 20240013 - 20240013
Опубликована: Июнь 1, 2024
Liquid
crystal
elastomer
(LCE)
is
a
soft
actuating
material
capable
of
producing
large
and
reversible
actuation
strain,
versatile
modes,
high
work
density,
which
can
be
exploited
for
next-generation
robots.
However,
the
slow
response
speed
low
power
density
in
LCE-based
actuators
remain
challenge,
limiting
their
practical
applications.
Researchers
have
been
considering
how
to
improve
these
performances.
In
this
review,
we
discuss
fundamentals
LCEs
emphasize
fast
strategies
developed
recent
years.
Firstly,
introduce
conventional
preparation
strategies.
Then,
describe
mechanisms
LCEs,
discussing
features
limitations.
third
part,
summarize
several
possible
approaches
as
case
studies
enhance
performance
including
reducing
physical
sizes,
introducing
active
heating
cooling
mechanisms,
utilizing
mechanical
instability,
developing
dielectric
LCEs.
Finally,
future
research
opportunities
challenges
rapid
Giant,
Год журнала:
2024,
Номер
19, С. 100299 - 100299
Опубликована: Июнь 5, 2024
In
the
era
of
smart
and
sustainable
technology
driven
by
naturally
occurring
materials,
various
nanocellulose-based
materials
play
a
crucial
role.
Shape
memory
behaviour
self-healing
capabilities
nanocelluloses
are
emerging
as
focal
points
in
numerous
research
domains.
Nanocellulose
its
derivatives
such
cellulose
nanocrystals
(CNC)
nanofibers
(CNF),
currently
limelight
due
to
their
excellent
shape-memory
properties,
making
them
suitable
for
multifunctional
devices.
this
regard,
CNF,
cutting-edge
material,
has
spurred
researchers
explore
potential
developing
contemporary
personalized
health
Therefore,
timely
comprehensive
review
is
essential
gain
deep
insights
into
effectiveness
CNF
Herein,
we
first
provide
succinct
introduction
all
nanocellulose
materials.
This
also
depicts
recent
advancements
breakthroughs
large
effective
synthesis
CNF-based
hybrid
Next,
focusing
on
performance,
sheds
new
light
advanced
applications
Finally,
perspectives
current
challenges
opportunities
field
summarized
future
an
in-depth
understanding
"CNF-based
materials."
Polymers,
Год журнала:
2024,
Номер
16(13), С. 1841 - 1841
Опубликована: Июнь 28, 2024
The
latest
progress
(the
year
2021-2024)
on
multifunctional
sensors
based
silicone
rubber
is
reported.
These
are
useful
for
real-time
monitoring
through
relative
resistance,
current
change,
and
capacitance
types.
present
review
contains
a
brief
overview
literature
survey
the
their
multifunctionalities.
This
an
introduction
to
different
functionalities
of
these
sensors.
Following
introduction,
types
filler
or
fabrication
briefly
described.
coming
section
deals
with
methodology
composites
where
integrated.
special
focus
mechanical
electro-mechanical
properties
discussed.
Electro-mechanical
response
time,
linearity,
gauge
factor
next
this
reports
dispersion
its
role
in
influencing
applications
Finally,
various
human
body
motions,
breathing
activity,
environment
humidity,
organic
gas
sensing,
and,
finally,
smart
textiles.
Ultimately,
study
summarizes
key
takeaway
from
article.
conclusions
focused
merits
demerits
followed
by
future
prospects.
Journal of Composites Science,
Год журнала:
2024,
Номер
8(8), С. 324 - 324
Опубликована: Авг. 16, 2024
Shape-memory
polymers
(SMPs)
possess
unique
properties
that
respond
to
external
stimuli.
The
current
review
discusses
types
of
SMPs,
fabrication
methods,
and
the
characterization
their
mechanical,
thermal,
shape
recovery
properties.
Research
suggests
SMP
composites,
when
infused
with
fillers,
demonstrate
enhanced
mechanical
thermal
characteristics.
On
other
hand,
blends,
particularly
incorporating
polylactic
acid
(PLA),
exhibit
most
efficient
recovery.
Furthermore,
crosslinking
density
in
polymer
blends
impacts
force,
showcasing
a
correlation
between
energy
storage
capacity
force
networks.
Overall,
show
promising
features,
rendering
them
advantageous
for
applications
artificial
muscles,
soft
actuators,
biomedical
devices.
This
also
future
prospectives
robust
applications.
Deleted Journal,
Год журнала:
2024,
Номер
3(2), С. 200137 - 200137
Опубликована: Апрель 21, 2024
The
ability
of
organisms
to
adjust
environmental
changes
offers
valuable
insights
into
the
development
and
creation
innovative
smart
systems.
As
requirements
increase,
materials
change
their
shapes
has
become
a
broader
aim
beyond
original
capabilities.
In
contrast
conventional
manufacturing
methods,
additive
(AM)
skillfully
combines
precise
three-dimensional
structures
intricate
response
mechanisms
biological
with
materials.
This
combination
enables
production
bionic
programmable
features.
Trends
such
as
dynamic
modulation,
responsiveness
multiple
stimuli,
integration
functions
are
emerging
significant
in
structures.
review
first
presents
that
nature
designed
built
various
organisms,
highlighting
relationship
between
structural
characteristics
patterns
deformation.
then
discusses
how
developed
using
AM
techniques
respond
different
stimuli.
Additionally,
potential
uses
biomedicine,
intelligent
robotics,
origami
construction,
aerospace
discussed.
Finally,
challenges
future
prospects
for
examined
goal
offering
solutions
creating
next
generation
systems
through
interdisciplinary
research.
Actuators
based
on
shape
memory
polymers
and
composites
incorporating
nanomaterial
additives
have
been
extensively
studied;
achieving
both
high
output
stress
precise
change
by
low-cost,
scalable
methods
is
a
long-term-desired
yet
challenging
task.
Here,
conventional
(polyurea)
carbon
nanotube
(CNT)
fillers
are
combined
to
fabricate
reinforced
composite
fibers
with
exceptional
actuation
performance,
wet-spinning
method
amenable
for
continuous
production.
It
found
that
thermal-induced
shrinkage
step
could
obtain
densified
strong
fibers,
the
presence
of
CNTs
effectively
promotes
tensile
orientation
polymer
molecular
chains,
leading
much
improved
mechanical
properties.
Consequently,
CNT/
polyurea
exhibit
stresses
as
33
MPa
within
0.36
s
during
thermal
actuation,
up
22
upon
electrical
stimulation
enabled
built-in
conductive
CNT
networks.
Utilizing
flexible
thin
various
behavior
also
demonstrated
including
conversion
between
different
structures/curvatures,
recovery
predefined
simple
patterns.
This
high-performance
capable
produced
low-cost
materials
fabrication
process,
may
find
many
potential
applications
in
wearable
devices,
robotics,
biomedical
areas.
