Journal of Polymer Science,
Год журнала:
2024,
Номер
62(20), С. 4599 - 4611
Опубликована: Июль 19, 2024
Abstract
As
a
soft
material
with
biocompatibility
and
stimulation
response,
ionic
conductive
hydrogel‐based
wearable
strain
sensors
show
great
potential
across
wide
spectrum
of
engineering
disciplines,
but
their
mechanical
toughness
is
limited
in
practical
applications.
In
this
study,
freeze‐thawing
techniques
were
utilized
to
fabricate
double‐network
hydrogels
poly(vinyl
alcohol)/polyacrylamide
(PVA/PAM)
both
covalent
physical
cross‐linking
networks.
These
demonstrate
excellent
performance,
an
elongation
at
break
2253%
tensile
strength
268.2
kPa.
Simultaneously,
they
also
display
high
sensitivity
(Gage
factor,
GF
=
2.32
0%–200%
strain),
achieve
rapid
response
time
368
ms
without
the
addition
extra
fillers
or
ions,
stable
signal
transmission
even
after
multiple
cycles,
fast
human
motion
detection.
Advanced Composites and Hybrid Materials,
Год журнала:
2023,
Номер
6(5)
Опубликована: Окт. 1, 2023
Abstract
Flexible
pressure
sensors
as
wearable
electronic
devices
to
monitor
human
health
have
attracted
significant
attention.
Herein,
a
simple
and
effective
carbonization-free
method
is
proposed
prepare
compressible
conductive
reduced
graphene
oxide
(rGO)–modified
plant
fiber
sponge
(defined
rGO-PFS).
The
introduced
GO
can
not
only
coat
on
the
surface
of
fibers,
but
also
form
large
amount
aerogel
with
microcellular
structure
in
macroporous
PFS.
After
reduction
treatment,
rGO-PFS
double-continuous
network
rGO
aerogel.
With
improvement
polydimethylsiloxane
(PDMS),
rGO-PFS@PDMS
composite
exhibits
outstanding
compressibility
(up
60%
compression
strain),
excellent
durability
(10,000
stable
cycles
at
50%
high
sensitivity
(234.07
kPa
−1
range
20
~
387.2
Pa),
low
detection
limit
(20
rapid
response
time
(28
ms)
for
practical
applications.
Graphical
A
oxide–modified
prepared
by
method.
polydimethylsiloxane,
compressibility,
durability,
sensitivity,
limit,
Conductive
hydrogels
exhibit
high
potential
in
the
fields
of
wearable
sensors,
healthcare
monitoring,
and
e-skins.
However,
it
remains
a
huge
challenge
to
integrate
elasticity,
low
hysteresis,
excellent
stretch-ability
physical
crosslinking
hydrogels.
This
study
reports
synthesis
polyacrylamide
(PAM)-3-(trimethoxysilyl)
propyl
methacrylate-grafted
super
arborized
silica
nanoparticle
(TSASN)-lithium
chloride
(LiCl)
hydrogel
sensors
with
electrical
conductivity.
The
introduction
TSASN
enhances
mechanical
strength
reversible
resilience
PAM-TSASN-LiCl
by
chain
entanglement
interfacial
chemical
bonding,
provides
stress-transfer
centers
for
external-force
diffusion.
These
show
outstanding
(a
tensile
stress
80-120
kPa,
elongation
at
break
900-1400%,
dissipated
energy
0.8-9.6
kJ
m
Advanced Materials,
Год журнала:
2024,
Номер
36(31)
Опубликована: Май 17, 2024
Abstract
Electronic
skin
(e‐skin),
a
skin‐like
wearable
electronic
device,
holds
great
promise
in
the
fields
of
telemedicine
and
personalized
healthcare
because
its
good
flexibility,
biocompatibility,
conformability,
sensing
performance.
E‐skin
can
monitor
various
health
indicators
human
body
real
time
over
long
term,
including
physical
(exercise,
respiration,
blood
pressure,
etc.)
chemical
(saliva,
sweat,
urine,
etc.).
In
recent
years,
development
materials,
analysis,
manufacturing
technologies
has
promoted
significant
e‐skin,
laying
foundation
for
application
next‐generation
medical
devices.
Herein,
properties
required
e‐skin
monitoring
devices
to
achieve
long‐term
precise
summarize
several
detectable
field
are
discussed.
Subsequently,
applications
integrated
systems
reviewed.
Finally,
current
challenges
future
directions
this
This
review
is
expected
generate
interest
inspiration
improvement
systems.
Journal of Polymer Science,
Год журнала:
2024,
Номер
62(20), С. 4599 - 4611
Опубликована: Июль 19, 2024
Abstract
As
a
soft
material
with
biocompatibility
and
stimulation
response,
ionic
conductive
hydrogel‐based
wearable
strain
sensors
show
great
potential
across
wide
spectrum
of
engineering
disciplines,
but
their
mechanical
toughness
is
limited
in
practical
applications.
In
this
study,
freeze‐thawing
techniques
were
utilized
to
fabricate
double‐network
hydrogels
poly(vinyl
alcohol)/polyacrylamide
(PVA/PAM)
both
covalent
physical
cross‐linking
networks.
These
demonstrate
excellent
performance,
an
elongation
at
break
2253%
tensile
strength
268.2
kPa.
Simultaneously,
they
also
display
high
sensitivity
(Gage
factor,
GF
=
2.32
0%–200%
strain),
achieve
rapid
response
time
368
ms
without
the
addition
extra
fillers
or
ions,
stable
signal
transmission
even
after
multiple
cycles,
fast
human
motion
detection.
