Abstract
A
novel
supramolecular
photoactuator
in
the
form
of
a
thin
film
centimetric
size
has
been
developed
as
an
alternative
to
traditional
liquid
crystal
elastomers
(LCE)
involving
azobenzene
(AZO)
units
or
photochromic
microcrystals.
This
is
produced
through
spin
coating
without
need
for
alignment
crosslinking.
The
combines
dithienylethene
(DTE)
functionalized
with
ureidopyrimidinone
(UPy)
units,
and
telechelic
thermoplastic
elastomer,
also
UPy,
allowing
quadruple
hydrogen
bonding
between
two
components.
Upon
alternating
ultraviolet
(UV)
visible
light
exposure,
exhibits
reversible
bending
color
changes,
studied
using
displacement
absorption
tracking
setups.
For
first
time,
photomechanical
effect
(PME)
quantitatively
correlated
photochromism,
showing
that
DTE
drive
movement
under
both
UV
(photocyclization)
(photoreversion)
light.
In
situ
illumination
techniques
reveal
PME
arises
from
photoinduced
strain
within
160
nm
UPy‐bonded
domains,
which
expand
contract
by
approximately
50%
light,
respectively.
semicrystalline
nature
elastomer
robust
network
connecting
components
are
critical
converting
microscopic
photostrain
into
macroscopic
actuation.
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."
Journal of Functional Biomaterials,
Год журнала:
2024,
Номер
15(10), С. 280 - 280
Опубликована: Сен. 25, 2024
Bone
tissue
regeneration
is
a
rapidly
evolving
field
aimed
at
the
development
of
biocompatible
materials
and
devices,
such
as
scaffolds,
to
treat
diseased
damaged
osseous
tissue.
Functional
scaffolds
maintain
structural
integrity
provide
mechanical
support
defect
site
during
healing
process,
while
simultaneously
enabling
or
improving
through
amplified
cellular
cues
between
scaffold
native
tissues.
Ample
research
on
functionalization
has
been
conducted
improve
scaffold–host
interaction,
including
fabrication
techniques,
biomaterial
selection,
surface
modifications,
integration
bioactive
molecular
additives,
post-processing
modifications.
Each
these
methods
plays
crucial
role
in
not
only
but
actively
participate
process
bone
joint
surgery.
This
review
provides
state-of-the-art,
comprehensive
overview
scaffold-based
strategies
used
engineering,
specifically
for
regeneration.
Critical
issues
obstacles
are
highlighted,
applications
advances
described,
future
directions
identified.
Macromolecular Materials and Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 14, 2025
Abstract
4D
bioprinting
is
a
groundbreaking
technology
with
potential
to
revolutionize
healthcare.
It
based
on
additive
manufacturing
technologies,
which
are
used
fabricate
dynamic
prosthetics
and
devices
from
biologically
compatible
smart
materials
that
respond
stimuli.
The
ultimate
end
of
the
creation
an
artificial
organ
perfectly
mimics
functional
movements
native
fully
integrated
within
human
body.
In
this
perspective,
two
phases
identified
toward
end.
first
minimally
invasive
surgery
(MIS)
using
shape
memory
composites
stimulated
by
near‐infrared
(NIR)
light
and/or
magnetic
fields.
second
tissue
engineering
(DTE)
activation
biological
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: Янв. 29, 2025
Over
the
past
two
decades,
remarkable
advancements
have
been
achieved
in
stimulus‐responsive
shape‐memory
polymers
(SMPs),
which
exhibit
desirable
properties
such
as
characteristics,
deformability,
and
biocompatibility,
while
responding
to
external
stimuli.
The
development
of
polymer
composites
(SMPCs)
leads
high
recovery
forces
novel
functionalities,
including
electrical
actuation,
magnetic
biocompatibility.
enhanced
remotely
controllable
functionality
further
expand
application
SMPs
biomedical
areas,
surgical
applications
for
replacing
handheld
instruments
drug
delivery
systems.
In
this
review,
device
SMPCs
are
focused
on
their
recent
bone
tissue
scaffolds,
lumen
stents,
carriers
examined.
Furthermore,
bottlenecks
challenges
encountered
by
devices
elucidated.
future
trend
is
also
discussed,
aiming
provide
valuable
insights
broadening
fields.
Materials Horizons,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
This
review
summarized
lignin/lignocellulose
materials
for
various
3D
printing
techniques
and
their
related
applications,
where
lignin
is
used
in
an
isolated
state,
as
part
of
lignocellulose
biomass
or
chemically
modified
to
better
bind
with
a
matrix.
