ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 17, 2024
Stretchable
conductive
hydrogels
exhibit
promising
potential
as
portable
electronic
devices
and
strain
sensors.
However,
they
suffer
from
intricate
preparation
procedures
inadequate
mechanical
properties
for
constructing
triboelectric
nanogenerators
(TENGs).
Herein,
we
propose
a
borax-cross-linked
poly(vinyl
alcohol)
(PVA)/polyethylene
glycol
(PEG)/Chinese
ink
(C)
carbon
nanoparticle
composite
hydrogel,
which
boasts
simple
fabrication
method
environmental
friendliness.
The
dispersion
of
nanoparticles
throughout
the
polymer
network
bolsters
strength
hydrogel
also
imparts
good
electrical
conductivity.
incorporation
PEG
improves
while
dynamic
bonding
between
borate
ions
PVA
confers
excellent
self-recovery
properties.
Upon
cutting
reuniting
fractured
surfaces
30
s,
two
segments
underwent
spontaneous
healing
without
external
stimuli.
mended
incisions
nearly
vanished
withstood
stretching
to
three
times
their
original
length
fracturing,
showing
remarkable
self-healing
capability
stretchability.
Finally,
TENGs
were
prepared
using
PVA/PEG/C
output
voltage
was
approximately
2.9
V
across
all
frequencies.
PVA/PEG/C-TENG
demonstrated
rapid
response
at
180°
bending,
reacting
stimulation
in
mere
0.256
s
returning
its
state
within
0.511
after
stimulus
removed.
shows
versatility
applications
such
wearable
motion
monitoring,
precise
stroke
recognition,
efficient
energy
harvesting.
ACS Applied Nano Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 2, 2025
A
conductive
hydrogel
is
widely
used
in
flexible
electronics,
strain
sensors,
and
energy
harvesting.
However,
poor
mechanical
property,
low
sensitivity,
slow
response
time
limit
their
application
sensors
triboelectric
nanogenerators
(TENG).
In
order
to
address
these
issues,
using
polyacrylamide
(PAM),
cellulose
nanofibers
(CNF),
MXene
composites
as
preparation
materials,
an
electrohydrodynamic
(EHD)
printing
method
assisted
in-situ
photopolymerization
proposed
fabricate
a
PAM/CNF/MXene
(PCM)
hydrogel.
the
precursor
solution
of
orderly
arranged
under
influence
electrostatic
field
force,
thereby
forming
stable
channel
MXene.
Compared
with
traditional
technology,
conductivity
hydrogels
fabricated
through
this
improved
by
58%.
Hydrogen
bond
formed
between
CNF
PAM,
which
improves
properties
hydrogels.
can
form
interpenetrating
networks
PAM/CNF
hydrogel,
providing
channels
for
improving
its
sensing
performance.
The
structure
endows
PCM
outstanding
(550%
tensile
strain).
Strain
based
on
exhibits
eminent
sensitivity
(6.73
gauge
factor),
rapid
response/recovery
(100/110
ms),
broad
detection
range
(1%
∼
550%).
CM-TENG
shows
excellent
electric
output
performance
(67.5
V
open
circuit
voltage
at
100%
addition,
sensor
applied
human
motion
monitoring
information
transmission,
self-powered
PCM-TENG
writing
recognition.
has
prospects
supply.
Abstract
Flexible
wearable
sensors
with
bimodal
functionality
offer
substantial
value
for
human
health
monitoring,
as
relying
on
a
single
indicator
is
insufficient
capturing
comprehensive
physiological
information.
However,
face
multiple
challenges
in
practical
applications,
including
mutual
interference
between
various
modalities,
and
integration
of
excellent
mechanical
properties,
interfacial
adhesion,
environmental
adaptability
biocompatibility.
Herein,
the
multifunctional
hydrogel,
synthesized
through
radical
grafting
supramolecular
self‐crosslinking
reactions,
exhibits
thermal
sensitivity
(TCR
=
−1.70%
°C
−1
),
high
toughness
(9.31
MJ
m
−
3
wide
strain
range
(0–600%),
outstanding
adhesion
strength
(36.07
kPa),
antifreeze,
visualization,
water
retention,
biocompatibility,
antibacterial
antioxidant
capabilities.
Leveraging
its
conductivity,
this
hydrogel
can
be
applied
electroluminescent,
triboelectricity,
electromyography
message
encryption.
Moreover,
fabricated
smart
temperature
monitoring.
To
avoid
two
signals,
system
“IS”‐shaped
configuration
innovatively
designed
based
finite
element
simulation
results.
The
flexible
circuit
modules,
data
transmission
form
closed‐loop
platform
rehabilitation
training
patients
arthritis
or
joint
surgery.
This
strategy
establishes
decoupling
self‐calibrating
utilizing
material
to
accurately
detect
parameters,
advancing
electronics
personalized
medicine.
The
rapid
development
of
wearable
technology,
flexible
electronics,
and
human–machine
interaction
has
brought
about
revolutionary
changes
to
the
fields
motion
analysis
physiological
monitoring.
Sensors
for
detecting
human
signals
have
become
a
hot
topic
current
research.
Inspired
by
muscle
fiber
structure,
this
paper
proposed
highly
stable
strain
sensor
that
was
composed
stretchable
Spandex
fibers
(SPF),
multiwalled
carbon
nanotubes
(MWCNTs),
silicone
rubber
(Ecoflex).
This
adopted
an
immersion
coating
process
in
which
MWCNTs
were
conformally
deposited
on
SPF,
Ecoflex
filled
into
interstices,
completing
encapsulation
filling
SPF
construct
three-dimensional
conductive
network.
Thanks
Ecoflex,
contact
between
during
stretching
avoided,
resulting
significant
change
resistance.
sensitivity
reached
54.84,
is
10
times
higher
than
before
with
range
up
70%.
also
prevented
detachment
stretching,
improving
mechanical
stability.
can
be
easily
attached
surface
skin
rapidly
monitor
various
signals.
Furthermore,
related
manipulator
through
wireless
Bluetooth
realize
intelligent
control
manipulator.
work
not
only
provided
more
precise
data
monitoring
method
medical
but
offered
innovative
solution
control.
Microsystems & Nanoengineering,
Год журнала:
2025,
Номер
11(1)
Опубликована: Март 4, 2025
Achieving
autonomously
responding
to
external
stimuli
and
providing
real-time
feedback
on
their
motion
state
are
key
challenges
in
soft
robotics.
Herein,
we
propose
an
asymmetric
three-layer
hydrogel
muscle
with
integrated
sensing
actuating
performances.
The
layer,
made
of
p(NIPAm-HEMA),
features
open
pore
structure,
enabling
it
achieve
58%
volume
shrinkage
just
8
s.
customizable
heater
allows
for
efficient
programmable
deformation
the
layer.
A
strain-responsive
a
linear
response
up
50%
strain,
is
designed
sense
process.
Leveraging
these
capabilities,
develop
that
can
recognize
lifted
objects
various
weights
or
grasped
different
sizes.
Furthermore,
demonstrate
self-crawling
robot
showcase
application
potential
robots
working
aquatic
environments.
This
robot,
featuring
modular
distributed
move
forward
under
closed-loop
control
based
self-detected
resistance
signals.
strategy
stimuli-responsive
materials
offers
unprecedented
capabilities
creating
smart
multifunctional
Polysaccharides,
Год журнала:
2025,
Номер
6(1), С. 19 - 19
Опубликована: Март 4, 2025
Chitosan
is
an
attractive
material
for
developing
inks
extrusion-based
bioprinting
of
3D
structures
owing
to
its
excellent
properties,
including
mechanical
properties
and
antimicrobial
activity
when
used
in
wound
dressings.
A
key
challenge
formulating
chitosan-based
improve
gelation
property
ensure
reliable
printing
the
stability
printed
structures.
To
address
these
challenges,
this
article
presents
a
novel
chitosan/oxidized
glucomannan
composite
hydrogel
obtained
through
combination
Schiff
base
phenol
crosslinking
reactions.
The
proposed
biomaterial
forms
soft
hydrogels
crosslinking,
which
can
be
further
stabilized
via
visible
light-induced
crosslinking.
This
dual-crosslinking
approach
enhances
printability
robustness
ink
materials.
exhibits
extrudability
improved
shape
retention
after
extrusion,
along
with
against
Escherichia
coli.
Moreover,
good
cytocompatibility
was
confirmed
animal
cell
studies
using
mouse
fibroblast
10T1/2
cells.
These
favorable
features
make
highly
promising
complex
structures,
such
as
tubes
nose-like
at
low
crosslinker
concentration
expand
prospects
chitosan
bioprinting,
providing
safer
more
efficient
alternative
tissue
engineering
other
biomedical
applications.
