Materials & Design,
Год журнала:
2023,
Номер
229, С. 111911 - 111911
Опубликована: Апрель 5, 2023
Flexible
wearable
strain
sensors
based
on
hydrogels
have
become
a
research
hotspot
in
recent
years
due
to
their
advanced
application
many
fields.
Currently,
most
hydrogel-based
exhibit
poor
mechanical
properties
and
low
sensitivity.
In
this
work,
conductive
hydrogel
as
sensor
was
developed
dual
crosslinked
polyvinyl
alcohol
(PVA)
networks.
The
PVA
the
main
skeleton
of
water-soluble
amino-polysiloxane
(APSi)
introduced
into
secondary
network.
APSi
were
locked
together
by
phytic
acid
(PA),
which
improved
microstructure
enhanced
hydrogel.
This
mainly
reflected
higher
tensile
strength
(1.27
MPa),
elongation
at
break
(425.5%),
electrical
conductivity
(0.975
S/m),
linearity
(R2
=
0.999)
sensitivity
(gauge
factor
(GF)
2.29).
(0.166–1.270
MPa)
(170.2–425.5%)
can
be
regulated
continuously
adjusting
amount
APSi.
These
silicone-enhanced
good
biocompatibility
hence
used
sensors.
Abstract
Stretchable
and
self-adhesive
conductive
hydrogels
hold
significant
importance
across
a
wide
spectrum
of
applications,
including
human–machine
interfaces,
wearable
devices,
soft
robotics.
However,
integrating
multiple
properties,
such
as
high
stretchability,
strong
interfacial
adhesion,
self-healing
capability,
sensitivity,
into
single
material
poses
technical
challenges.
Herein,
we
present
multifunctional
hydrogel
based
on
poly(acrylic
acid)
(PAA),
dopamine-functionalized
pectin
(PT-DA),
polydopamine-coated
reduction
graphene
oxide
(rGO-PDA),
Fe
3+
an
ionic
cross-linker.
This
exhibits
combination
stretchability
(2000%),
rapid
(~
94%
recovery
in
5
s),
robust
self-adhesion
to
various
substrates.
Notably,
the
demonstrates
remarkable
skin
adhesion
strength
85
kPa,
surpassing
previous
adhesive
hydrogels.
Furthermore,
incorporating
rGO
within
network
creates
electric
pathways,
ensuring
excellent
conductivity
(0.56
S
m
–1
).
Consequently,
these
exhibit
strain-sensing
properties
with
increase
gauge
factor
(GF)
14.6,
covering
extensive
detection
range
~
1000%,
fast
response
(198
ms)
exceptional
cycle
stability.
These
can
be
seamlessly
integrated
motion
sensors
capable
distinguishing
between
or
subtle
movements
human
body.
Biomacromolecules,
Год журнала:
2024,
Номер
25(2), С. 819 - 828
Опубликована: Янв. 22, 2024
The
combinational
properties
with
excellent
mechanical
properties,
adhesive
performance,
hemostatic
ability,
antibacterial
action,
and
wound
healing
efficacy
are
highly
desirable
for
injectable
hydrogels'
practical
applications
in
hemorrhage
control
closure,
but
designing
one
single
hydrogel
system
integrating
such
is
still
difficult.
Herein,
a
simplified
yet
straightforward
strategy
proposed
to
prepare
an
robust
poly(N,N-dimethylacrylamide)
(PDMAA)/carboxymethyl
chitosan
(CMCS)
induced
by
tranexamic
acid
(TXA).
TXA
not
only
promotes
the
rapid
generation
of
free
radicals
also
introduces
multiple
hydrogen
bonds
into
network.
Moreover,
as
common
clinical
drug,
itself
has
effects.
In
addition,
CMCS
imparts
sterilization
hemostasis
effects
hydrogel,
thereby
promoting
healing.
Besides,
amino
carboxyl
groups
on
molecules
hydroxyl,
amino,
can
form
wet
biological
tissues,
leading
good
tissue
adhesion
hydrogel.
As
result,
(up
1.83
MPa
at
90%
compression
strain),
performance
18.7
kPa
strength
porcine
skin
tissue),
biocompatibility,
activity,
be
fabricated
within
several
minutes.
These
advantages
enable
efficiently
stop
(blood
loss
amount:
110
mg;
time:
25
s)
promote
process
(wound
closure
rate
2
weeks:
83%),
which
verified
using
rat
models
liver
bleeding
infected
full
thickness
defect.
Overall,
this
facile
design
incorporating
unique
will
greatly
advance
hydrogel's
application
ACS Nano,
Год журнала:
2024,
Номер
18(16), С. 10818 - 10828
Опубликована: Апрель 10, 2024
Rapid
advancements
in
immersive
communications
and
artificial
intelligence
have
created
a
pressing
demand
for
high-performance
tactile
sensing
gloves
capable
of
delivering
high
sensitivity
wide
range.
Unfortunately,
existing
fall
short
terms
user
comfort
are
ill-suited
underwater
applications.
To
address
these
limitations,
we
propose
flexible
hand
gesture
recognition
glove
(GRG)
that
contains
micropillar
sensors
(MPTSs)
inspired
by
the
tube
foot
starfish.
The
as-prepared
offer
working
range
(5
Pa
to
450
kPa),
superfast
response
time
(23
ms),
reliable
repeatability
(∼10000
cycles),
low
limit
detection.
Furthermore,
MPTSs
waterproof,
which
makes
them
well-suited
By
integrating
with
machine
learning
algorithm,
proposed
GRG
system
achieves
intelligent
16
gestures
under
water,
significantly
extends
real-time
effective
communication
capabilities
divers.
holds
tremendous
potential
applications
field
communications.
Chemical Society Reviews,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Recent
advancements
in
wearable
biosensors
and
bioelectronics
highlight
biocompatible
conducting
nanocomposite
hydrogels
as
key
components
for
personalized
health
devices
soft
electronics.
ACS Applied Materials & Interfaces,
Год журнала:
2022,
Номер
14(49), С. 55119 - 55129
Опубликована: Дек. 1, 2022
Flexible
piezoresistive
sensors
are
highly
desirable
for
tactile
sensing
and
wearable
electronics.
However,
the
reported
flexible
have
inherent
trade-off
effect
between
high
sensitivity
wide
pressure
ranges.
Herein,
we
report
a
sensor
with
three-dimensional
(3D)
porous
microstructured
layer
composed
of
silver
nanowires
(AgNWs)
poly(vinylidene
fluoride)
(PVDF)
matrix,
exhibiting
Benefiting
from
conductive
networks
AgNWs
3D
structure
PVDF,
AgNWs/PVDF
composite
(PAPC)-based
exhibits
sensitivities
0.014
0.009
kPa-1
in
ranges
0-30
30-100
kPa,
respectively.
In
addition,
fabricated
also
shows
fast
response
time
64
ms,
low
detection
limit
25
Pa,
long-term
durability
over
10,000
continuous
cycles.
The
PAPC-based
can
accurately
monitor
various
human
physiological
activities
(ranging
subtle
deformations
to
vigorous
body
movements)
by
quantitatively
measuring
sensation
on
skin.
This
work
indicates
that
proposed
be
potentially
applicable
mobile
healthcare
monitoring
devices
as
well
next-generation
Advanced Materials,
Год журнала:
2023,
Номер
35(42)
Опубликована: Июль 12, 2023
With
the
development
of
various
gel-based
flexible
sensors,
novel
gels
with
multiple
integrated
and
efficient
properties,
particularly
recyclability,
have
been
developed.
Herein,
a
starch-based
ADM
(amylopectin
(AP)-poly(3-[dimethyl-[2-(2-methylprop-2-
enoyloxy)ethyl]azaniumyl]propane-1-sulfonate)
(PDMAPS)-MXene)
gel
is
prepared
by
facile
"cooking"
strategy
accompanying
gelatinization
AP
polymerization
reaction
zwitterionic
monomers.
Reversible
crosslinking
in
occurs
through
hydrogen
bonding
electrostatic
interactions.
The
exhibits
high
stretchability
(≈2700%,
after
one
month),
swift
self-healing
performance,
self-adhesive
favorable
freezing
resistance,
satisfactory
moisturizing
properties
(≥30
days).
Interestingly,
can
be
recycled
reused
"kneading"
method
"dissolution-dialysis"
process,
respectively.
Furthermore,
assembled
as
strain
sensor
broad
working
range
(≈800%)
quick
response
time
(response
211
ms
recovery
253
ms,
under
10%
strain)
to
detect
macro-
micro-human-motions,
even
harsh
conditions
such
pronunciation
handwriting.
also
used
humidity
investigate
human
respiratory
status,
suggesting
its
practical
application
personal
health
management.
This
study
provides
for
preparation
high-performance
sensors.
