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
Macromolecular Rapid Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 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.
Advanced Engineering Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 3, 2025
The
integration
of
water‐induced
shape
memory
polymers
into
4D
printing
provides
novel
opportunities
to
create
innovative
intelligent
medical
devices.
Herein,
poly(L‐lactic)
acid
(PLLA)/silk
fibroin
(SF)
scaffolds
with
capabilities
and
enhanced
mechanical
properties
are
developed
using
direct‐write
technology.
By
analyzing
the
influence
content
SF
on
rheological
properties,
apparent
viscosity
volatile
ink,
direct
writing
process
PLLA/SF
is
systematically
investigated.
Results
reveal
that
PLLA/SF‐30
wt%
scaffold
a
50%
filling
ratio
achieves
optimal
compressive
strength
12.27
MPa,
modulus
2.01
which
1.42
2.83
times
pure
PLLA
scaffolds,
respectively.
Furthermore,
exhibits
good
behavior
in
water
at
40
°C,
fixation
(
R
f
)
94.6%
recovery
r
67.0%.
A
4D‐printed
grabber
made
from
can
successfully
grasp
objects
weighing
10
its
own
weight.
These
results
provide
important
insights
potential
applications
healthcare,
enhancing
their
promise
for
personalized
Deleted Journal,
Год журнала:
2024,
Номер
3(4), С. 200158 - 200158
Опубликована: Июль 14, 2024
China
derives
its
name
from
rich
legacy
of
traditional
ceramic
arts,
which
has
inspired
generations
people
in
and
beyond
to
improve
their
processing
skills.
The
review
categorises
the
various
additive
manufacturing
techniques
developed
into
dot-by-dot,
line-by-line,
area-by-area
techniques,
according
corresponding
dimensional
printing
strategies.
These
are
categorized
ISO
standards,
with
an
overview
representative
achievements
by
Chinese
research
groups
for
each
method.
also
summarizes
compares
materials,
parameters,
product
properties
those
studies,
highlighting
differences
speeds
among
different
In
addition,
milestones
contemporary
four-dimensional
(4D)
illustrated
terms
new
material
(4D
elastomer-derived
ceramics),
process
additive–subtractive
function
shape
memory
ceramics).
Finally,
prospects
applications
discussed.
Langmuir,
Год журнала:
2024,
Номер
40(31), С. 15957 - 15968
Опубликована: Июль 23, 2024
In
recent
years,
shape
memory
polymers
(SMPs)
and
self-healing
(SHPs)
have
been
research
hotspots
in
the
field
of
smart
owing
to
their
unique
stimulus
response
mechanisms.
Previous
on
SHPs
has
primarily
focused
contact
repair.
However,
instances
where
substantial
cracks
occur
during
practical
use,
autonomous
closure
becomes
challenging,
impeding
effective
By
integration
effect
(SME)
with
SHPs,
physical
wound
can
be
achieved
via
SME,
facilitating
subsequent
chemical/physical
repair
processes
enhancing
effectiveness.
This
article
reviews
key
findings
from
previous
memory-assisted
(SMASH)
materials
addresses
challenges
opportunities
for
future
investigation.
Journal of the mechanical behavior of biomedical materials/Journal of mechanical behavior of biomedical materials,
Год журнала:
2024,
Номер
160, С. 106719 - 106719
Опубликована: Сен. 4, 2024
This
study
introduces
a
novel
approach
to
4D
printing
of
biocompatible
Poly
lactic
acid
(PLA)/poly
methyl
methacrylate
(PMMA)
blends
using
Artificial
Neural
Network
(ANN)
and
Response
Surface
Methodology
(RSM).
The
goal
is
optimize
PMMA
content,
nozzle
temperature,
raster
angle,
speed
enhance
shape
memory
properties
mechanical
strength.
materials,
PLA
PMMA,
are
melt-blended
printed
pellet-based
3D
printer.
Differential
Scanning
Calorimetry
(DSC)
Dynamic
Mechanical
Thermal
Analysis
(DMTA)
assess
the
thermal
behavior
compatibility
blends.
ANN
model
demonstrates
superior
prediction
accuracy
generalization
capability
compared
RSM
model.
Experimental
results
show
recovery
ratio
100%
an
ultimate
tensile
strength
65.2
MPa,
significantly
higher
than
pure
PLA.
A
bio-screw,
with
optimized
parameters,
excellent
behavior,
suitable
for
biomedical
applications
such
as
orthopaedics
dental
implants.
research
presents
innovative
method
PLA/PMMA
blends,
highlighting
their
potential
in
creating
advanced,
high-performance
materials
medical
use.
