REVIEWS ON ADVANCED MATERIALS SCIENCE,
Journal Year:
2024,
Volume and Issue:
63(1)
Published: Jan. 1, 2024
Abstract
4D
printing,
the
fabrication
of
dynamic
3D
objects,
has
emerged
as
a
frontier
in
additive
manufacturing,
benefiting
from
rapid
advancements
printing
technologies
and
development
new
stimuli-responsive
materials.
Among
diverse
materials
explored
for
hydrogel,
renowned
its
exceptional
flexibility,
biocompatibility,
tunable
mechanical
properties,
is
class
soft
well-suited
printing.
In
addition
to
selecting
developing
appropriate
materials,
it
important
devise
suitable
strategies
enable
hydrogel-based
structures
that
can
perform
complex
shape-changing
under
external
stimuli
various
applications,
such
robotics
biomedical
areas.
view
this,
strategies,
including
structural
design,
scheme,
control
are
systematically
summarized.
This
review
aims
provide
an
up-to-date
evolution
4D-printed
hydrogels
insights
into
utilization
these
techniques,
direct
ink
writing,
stereolithography,
two-photon
polymerization,
hydrogel
specific
functions
applications.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(7), P. 9224 - 9230
Published: Feb. 9, 2024
Soft
robots
have
great
potential
applications
in
manufacturing,
disaster
rescue,
medical
treatment,
etc.
Artificial
muscle
is
one
of
the
most
important
components
a
soft
robot.
In
previous
years,
hydrogel
actuators
that
can
be
controllably
deformed
by
stimuli
external
signals
been
developed
as
good
candidates
for
muscle-like
materials.
this
article,
we
successfully
prepared
chemical
fuel-driven
self-resettable
bilayer
actuator
mimicking
natural
muscles
with
aid
new
negative
feedback
reaction
network.
The
temporarily
deform
upon
addition
H+
(chemical
fuel).
Subsequently,
accelerated
between
BrO3–
and
Fe(CN)64–,
which
consume
H+.
It
resulted
spontaneous
recovery
pH
well
shape
actuator.
Such
an
exhibits
similarity
actuation
mechanisms
automaticity
manipulation
compared
to
widely
reported
stimuli-responsive
actuators.
This
illustrates
promising
dynamic
material
functions
living
creatures.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(26)
Published: Feb. 22, 2024
Abstract
A
pioneering
method
is
reported
for
creating
thermoresponsive
biofunctional
hydrogel
microstructures
using
maskless
multiphoton
lithography.
Departing
from
conventional
multiphoton‐triggered
polymerization‐based
techniques,
this
approach
relies
on
simultaneous
photocrosslinking
and
attachment
of
already
pre‐synthesized
polymer
chains
onto
solid
substrates.
The
allows
improving
control
over
network
characteristics
enables
facile
integration
additional
functionalities
through
postmodification
with
biomolecules
at
specific
sites.
Exploring
two
distinct
benzophenone‐
anthraquinone‐based
photocrosslinkers
incorporated
into
specially
designed
poly(
N
‐isopropyl
acrylamide)‐based
co‐
terpolymers,
the
efficacy
scrutinized
use
a
custom
femtosecond
near‐infrared
laser
lithographer.
Comprehensive
characterization
via
surface
plasmon
resonance
imaging,
atomic
force
microscopy,
optical
fluorescence
microscopy
reveals
swelling
behavior
demonstrates
feasibility.
Notably,
within
range
parameters,
surface‐attached
exhibit
quasiperiodic
topography
akin
to
wrinkle‐pattern
formation.
Leveraging
capabilities
established
lithographer
systems
that
offer
fast
pattern
writing
high
resolution,
holds
great
promise
versatile
fabrication
multifunctional
3D
micro‐
nanostructures.
Such
tailored
responsive
materials
spatial
composition,
behavior,
are
particularly
attractive
in
areas
bioanalytical
biomedical
technologies.
