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 Sensors,
Год журнала:
2024,
Номер
9(10), С. 5322 - 5332
Опубликована: Окт. 15, 2024
Hydrogels
based
on
borate
ester
bonds
exhibit
remarkable
tensile
strength
and
self-healing
ability,
which
make
them
a
promising
material
for
various
biological
research
strain
sensor
applications.
However,
in
order
to
meet
the
practical
application
of
hydrogel
sensors,
they
must
also
show
high
conductivity,
frost
resistance,
proper
adhesion,
is
still
continuous
challenge.
Herein,
triple
network
was
prepared
using
poly(vinyl
alcohol)
(PVA)
as
first
network,
ethylene
imine
polymer
(PEI)
second
poly(acrylamide-
ACS Applied Polymer Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 14, 2025
Ion-conductive
hydrogels
have
attracted
tremendous
attention
and
are
considered
promising
for
ionic
skin.
However,
the
simultaneous
incorporation
of
excellent
mechanical
strength,
low-temperature
tolerance,
high
conductivity
transparency
remains
a
great
challenge,
which
will
restrict
their
scope
applications.
Here,
transparent,
freezing-tolerant,
mechanically
robust
ion-conductive
hydrogel
based
on
double-network
structure
(k-carrageenan/poly(acrylic
acid))
in
binary
solvent
system
(ionic
liquid/water)
is
proposed
strain-sensing
application.
The
liquid
([EMIM]Cl)
introduced
into
double
network
by
simple
one-pot
polymerization
method,
followed
subsequent
drying
treatment.
Benefiting
from
presence
liquid,
prepared
transparent
(>90%
transmittance)
demonstrates
properties,
including
fracture
stretchability
(>3000%
strain),
tensile
strength
(>0.45
MPa),
low
Young's
modulus
(65
kPa).
Meanwhile,
due
to
reduction
water
system,
exhibit
good
freezing
tolerance
(<−25
°C),
while
maintaining
up
0.25
S/m
at
room
temperature.
In
addition,
benefiting
hydrogel-based
flexible
strain
sensors
studied
demonstrated
various
applications
toward
deformation
detect
human
motion
signals,
such
as
finger
bending
walking.
This
work
can
provide
strategy
construct
with
environmental
stability
potential
wearable
sensors.
ACS Applied Electronic Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 15, 2025
Conductive
hydrogels,
with
their
unique
combination
of
electrical
conductivity
and
stretchability,
are
emerging
as
critical
components
for
next-generation,
flexible,
wearable
sensors.
In
this
work,
we
aimed
to
develop
a
low-cost,
easy-to-manufacture
hydrogel
sensor
using
ionic
compounds
the
source
conductivity.
Hydrogels
were
synthesized
acrylamide,
poly(ethylene
glycol),
carboxymethyl
cellulose,
systematic
variation
LiCl,
NaCl,
KCl,
labeled
Li-CH,
Na-CH,
K-CH,
respectively,
explore
effects
on
nanostructure
mechanical
properties
hydrogels.
Among
different
formulations,
Na-CH
demonstrated
superior
performance
optimized
elongation
at
break,
tensile
strength,
toughness,
highlighting
importance
ion
selection
in
design.
also
exhibited
excellent
outstanding
transparency,
high
sensitivity
detecting
wide
range
body
movements,
from
large-scale
gestures
subtle
physiological
signals
such
pulse
detection.
With
its
exceptional
robustness,
repeatable
sensing
performance,
shows
great
potential
future
applications
flexible
electronics,
healthcare
monitoring
systems,
smart
display
technologies.
