Smart Materials and Structures,
Год журнала:
2024,
Номер
33(3), С. 035018 - 035018
Опубликована: Фев. 2, 2024
Abstract
Braille
displays
are
a
class
of
human–computer
interaction
electromechanical
devices
that
display
dynamic
braille
through
an
array
actuators.
However,
existing
actuators
for
suffer
from
issues
such
as
bulky
size,
heavy
weight,
and
small
tactile
displacement,
leading
to
difficulties
in
improving
their
resolution
readability.
To
address
the
above
issues,
we
developed
novel
electroactive
artificial
muscle
actuator
applied
it
displays.
The
consists
surface-structured
PVC
gel
planar
electrodes.
investigate
effect
surface
structure
on
performance
actuators,
four
types
gels
were
fabricated
by
casting
process,
actuation
was
tested.
results
show
conical
frustum
structures
more
favorable
displacement
while
cylindrical
quadrangular
recovery
forces.
We
observed
both
electrical
actuation,
suggesting
is
mainly
caused
deformation
array.
also
analyzed
electrowetting
effects
using
Lippmann–Young
equation,
explain
differences
with
different
contact
angles.
Moreover,
six
multilayer
composed
unit
digits
0
9.
It
has
been
shown
excellent
mechanical
properties,
which
makes
ideal
solution
Advanced Materials,
Год журнала:
2023,
Номер
35(40)
Опубликована: Июнь 26, 2023
Information
encryption
technologies
are
very
important
for
security,
health,
commodity,
and
communications,
etc.
Novel
information
mechanisms
materials
desired
to
achieve
multimode
reprogrammable
encryption.
Here,
a
supramolecular
strategy
is
demonstrated
multimodal,
erasable,
reprogrammable,
reusable
by
reversibly
modulating
fluorescence.
A
butyl-naphthalimide
with
flexible
ethylenediamine
functionalized
β-cyclodextrin
(N-CD)
utilized
as
fluorescent
responsive
ink
printing
or
patterning
on
polymer
brushes
dangling
adamantane
group
grafted
hydrogels.
The
photoluminescent
naphthalimide
moiety
bonded
β-CD
entrapped
in
the
cavity.
Its
fluorescence
highly
weakened
cavity
recovers
after
being
expelled
from
competing
guest
molecule
emit
bright
green
photoluminescence
under
UV.
Experiments
theoretical
calculations
suggest
π-π
stacking
ICT
primary
mechanism
naphthalimides
assembly
fluorescence,
which
can
be
quenched
through
insertion
of
conjugated
molecules
recover
removing
insert.
Such
reversible
quenching
recovering
used
repeated
writing,
erasing,
re-writing
information.
Supramolecular
recognition
hydrogel
shape
memory
further
combined
dual-encryption.
This
study
provides
novel
develop
smart
improved
security
broad
applications.
Biomacromolecules,
Год журнала:
2023,
Номер
24(3), С. 1287 - 1298
Опубликована: Фев. 6, 2023
Ion
conductive
hydrogels
(ICHs)
have
attracted
great
interest
in
the
application
of
ionic
skin
because
their
superior
characteristics.
However,
it
remains
a
challenge
for
ICHs
to
achieve
balanced
properties
high
strength,
large
fracture
strain,
self-healing
and
freezing
tolerance.
In
this
study,
strong,
stretchable,
antifreezing
ICH
was
demonstrated
by
rationally
designing
multiphysically
cross-linked
network
structure
consisting
hydrophobic
association,
metal-ion
coordination
chain
entanglement
among
poly(acrylic
acid)
(PAA)
polymer
chains.
The
deliberately
designed
Brij
S
100
acrylate
(Brij-100A)
micelle
cross-linker
can
effectively
dissipate
energy
endow
with
desirable
stretchability.
ability
originates
from
reversible
association
micelles
Fe3+-COO–
coordination.
After
addition
NaCl,
chain-entangled
physical
caused
salting-out
effect
both
enhance
mechanical
strength
promote
electron
transport.
With
synergy
mental-ligand
entanglement,
PAA/Brij-100A/Fe3+/NaCl
(PAA/BA/Fe3+/NaCl)
exhibited
tensile
strain
1140%,
0.93
MPa
toughness
3.48
MJ
m–3.
Besides,
PAA/BA/Fe3+/NaCl
conductivity
0.43
m–1
good
resistance.
based
on
showed
sensitivity
(GF
=
5.29),
wide
range
(0–950%),
fast
response
time
(220
ms)
stability.
Also,
significantly
prolong
its
service
time,
property
broaden
applicable
temperature.
This
study
offers
new
insight
into
design
multifunctional
wearable
electronics.
Modulating
the
inflammatory
microenvironment
can
inhibit
process
of
diseases
(IDs).
A
tri-cross-linked
microenvironment-responsive
hydrogel
with
ideal
mechanical
properties
achieves
triggerable
and
sustained
drug
delivery
regulates
microenvironment.
Here,
this
study
develops
an
(OD-PP@SeNPs)
composed
phenylboronic
acid
grafted
polylysine
(PP),
oxidized
dextran
(OD),
selenium
nanoparticles
(SeNPs).
The
introduction
SeNPs
as
initiators
nano-fillers
into
results
in
extra
cross-linking
polymer
network
through
hydrogen
bonding.
Based
on
Schiff
base
bonds,
Phenylboronate
ester
a
reactive
oxygen
species
(ROS)/pH
dual
responsive
triple-network
is
achieved.
has
injectable,
self-healing,
adhesion,
outstanding
flexibility,
suitable
swelling
capacity,
optimal
biodegradability,
excellent
stimuli-responsive
active
substance
release
performance,
prominent
biocompatibility.
Most
importantly,
ROS
scavenging
pH-regulating
ability
protects
cells
from
oxidative
stress
induces
macrophages
M2
polarization
to
reduce
cytokines
PI3K/AKT/NF-κB
MAPK
pathways,
exerting
anti-inflammatory
effects
reshaping
microenvironment,
thereby
effectively
treating
typical
IDs,
including
S.
aureus
infected
wound
rheumatoid
arthritis
rats.
In
conclusion,
dynamically
injectable
structure
provides
effective
strategy
treat
holding
great
promise
clinical
application.
ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(7), С. 10030 - 10043
Опубликована: Фев. 13, 2023
As
a
kind
of
soft
smart
material,
hydrogel
actuators
have
extensive
development
prospects,
but
it
is
still
difficult
for
these
to
integrate
multiresponsiveness,
multiple
remote
actuation,
high
strength,
fast
responsiveness,
and
programmable
complex
deformation.
Herein,
we
explored
an
anisotropic
bilayer
actuator
with
Fe3O4/co-poly(isopropylacrylamide-4-benzoylphenyl
acrylate)
[Fe3O4/P(NIPAM-ABP)]
active
layer
isotropic
conductive
adhesive
(ICAs)
passive
based
on
the
layer-by-layer
method.
Benefiting
from
fibrosis
porosity
Fe3O4/P(NIPAM-ABP)
hydrogel,
ICAs-Fe3O4/P(NIPAM-ABP)
has
excellent
mechanical
strength
(tensile
3.1
±
0.3
MPa)
response
speed
(temperature
(45
°C):
bending
2400.3°/s;
near-infrared
(NIR)
light:
356.4°/s;
electricity
(2
V):
180°/s;
water
(10
recovery
30.0°/s).
In
addition,
good
photothermal
properties
magnetic
conductivity
Fe3O4
nanoparticles
provide
precise
remotely
controllable
light-
magnetic-actuated
actuator.
The
Ag
microsheets
(1.4
×
104
S/cm)
electrical-actuated
property
Combined
responsiveness
P(NIPAM-ABP),
can
achieve
short-range
actuation
including
temperature-,
ethanol-,
salt-responses.
More
importantly,
light,
electrical,
responses.
Finally,
fibers
structures
deformational
programmability.
Inspired
by
some
phenomena
in
nature,
several
actuating
devices
above
characteristics
been
successfully
developed.
This
study
general
method
multifunctional
will
new
strategy
exploring
materials
suitable
bioinspired
systems.
Analytical Chemistry,
Год журнала:
2023,
Номер
95(8), С. 4220 - 4226
Опубликована: Фев. 14, 2023
Bisphenol
A
(BPA),
one
of
the
most
abundantly
produced
endocrine
disrupting
chemicals,
is
widely
used
in
everyday
plastic
products
and
thus
must
be
monitored.
Multimode
sensing
platforms
are
able
to
combine
advantages
different
strategies
while
solving
issues
inaccurate
test
results
single
signal
sensing.
However,
exploration
this
field
limited
due
compromise
conditions
inevitable
mutual
interferences
systems.
Herein,
we
constructed
a
two-dimensional
photonic
crystal
dually
cross-linked
supramolecular
hydrogel
(2DPCDCSH)
by
utilizing
host-guest
pair
β-cyclodextrin
(β-CD)
tert-butyl
(t-Bu)
as
second
cross-linking
for
colorimetric
fluorescent
dual-mode
BPA.
Based
on
fact
that
BPA
can
act
competitive
guest
break
interaction
between
β-CD
t-Bu,
density
decreased
an
expansion-induced
structural
color
change
occurred.
Sensitive
selective
detection
easily
achieved
measuring
Debye
diffraction
ring
diameter
or
observing
2DPC
with
limit
1
μg
mL-1.
Moreover,
formation
β-CD/BPA
complex
gave
significant
enhancement
intrinsic
fluorescence
BPA,
obtaining
0.001
The
two
systems
share
same
reaction
condition
yield
wider
dynamic
response
range
than
strategy.
Overall,
proposed
method
presented
efficient,
rapid,
cost-effective,
regenerative
analysis
shed
new
insights
design
diversified
platforms.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(41)
Опубликована: Июнь 13, 2023
Abstract
Advanced
bioadhesion
techniques
have
offered
unprecedented
opportunities
for
life‐saving
internal
surgical
procedures.
However,
most
existing
bioadhesives
failed
to
rapidly
establish
long‐lasting
reliable
biointerface
and
effectively
reconstruct
normal
physiological
function
in
the
body
fluid‐rich
inevitable
dynamic
environment.
Herein,
a
PEGylated
poly(glycerol
sebacate)‐based
Janus
adhesive
patch
(PEGS‐based
JAP)
is
developed
by
integrating
physically
crosslinked
guanidinylated
PEGS
(PEGSG)
acryloylated
PEGS‐chemically
poly(acrylic
acid)‐
N
‐hydrosuccinimide
ester
(PEGSA‐crosslinked
PAAc‐NHS)
with
single‐sided
zwitterionic
polymer‐interpenetrated
layer.
The
dry
JAP
can
absorb
unpleasant
interfacial
water
form
strong
physical
interactions
wet
tissues.
Benefiting
from
amphiphilic
nature
of
PEGSG
simple
spatial‐confined
drying
process,
allowed
resist
excessive
swelling
limitedly
swell
along
one
direction
avoid
deterioration
as‐established
conformable
patch‐tissue
interface.
Moreover,
covalent
formed
subsequently
further
improve
strength
ensure
adhesion.
Meanwhile,
notch‐insensitive
puncture‐resistant
achieve
tough
adhesion
adapt
conditions
owing
highly
efficient
energy‐dissipation
mechanism
cross‐linked
network.
Combining
above
ideal
features
desirable
postoperative
anti‐adhesion
ability,
PEGS‐based
demonstrated
be
promising
candidate
tissue
reconstruction.
International Journal of Precision Engineering and Manufacturing-Green Technology,
Год журнала:
2023,
Номер
10(6), С. 1661 - 1710
Опубликована: Июль 13, 2023
Abstract
Soft
actuators
have
brought
significant
advancements
to
robotics,
allowing
robots
perform
a
diverse
range
of
tasks
across
various
domains.
However,
the
increased
use
soft
has
resulted
in
negative
environmental
impacts,
including
material
consumption,
waste
generation,
and
energy
consumption.
To
address
these
challenges,
research
is
increasingly
focused
on
developing
sustainable
(SSAs)
that
can
provide
high
performance
while
minimizing
harm.
This
review
article
aims
explore
development
manufacturing
SSAs
their
potential
reduce
consumption
promoting
sustainability.
The
examines
categories
actuators,
such
as
multi-responsive
ones,
shape-locking
variants,
biological
water-responsive
models,
well
implementation
through
multi-material
printing
and,
3D
4D
techniques.
also
highlights
applications
SSAs,
manufacturing,
human–machine
interaction,
locomotion,
manipulation.
Furthermore,
explores
methods
for
reducing
using
recycled
materials
eco-friendly
processes
circular
economy.
Finally,
study
provides
comprehensive
analysis
steer
evolution
robotics
towards
more
future
ACS Biomaterials Science & Engineering,
Год журнала:
2023,
Номер
9(5), С. 2694 - 2705
Опубликована: Март 31, 2023
Conductive
hydrogels
have
been
in
huge
demand
biomedical
and
wearable
electronics.
However,
the
application
of
traditional
conductive
is
largely
limited
due
to
their
poor
mechanical
properties.
Here,
a
hydrogel
with
excellent
strength
swelling
resistance
properties
prepared
by
ion
cross-linking,
directional
freeze-drying,
rehydration.
First,
acrylamide
acrylic
acid
are
polymerized
κ-carrageenan
solution
form
hydrogel.
Then,
obtained
cross-linked
Fe3+
soaking
ferric
chloride
solution.
Finally,
ionic
reinforced
freeze-drying
The
resulting
has
tensile
(5.67
MPa)
high
toughness
(7.63
MJ/m3).
It
worth
noting
that
also
had
anti-swelling
Its
volume
almost
show
no
changes
after
deionized
water
for
40
days.
In
addition,
exhibits
good
conductivity
(0.091
S/m),
sensitivity,
stability
when
applied
as
strain
sensor.
This
work
proposes
simple
method
fabricate
great
resistance,
which
displays
potential
varied
fields.