Journal of Polymer Science,
Journal Year:
2024,
Volume and Issue:
62(20), P. 4599 - 4611
Published: July 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.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(4), P. 5128 - 5138
Published: Jan. 19, 2023
The
rapid
development
of
wearable
electronic
devices
and
virtual
reality
technology
has
revived
interest
in
flexible
sensing
control
devices.
Here,
we
report
an
ionic
hydrogel
(PTSM)
prepared
from
polypropylene
amine
(PAM),
tannic
acid
(TA),
sodium
alginate
(SA),
MXene.
Based
on
the
multiple
weak
H-bonds,
this
exhibits
excellent
stretchability
(strain
>4600%),
adhesion,
self-healing.
introduction
MXene
nanosheets
endows
sensor
with
a
high
gauge
factor
(GF)
6.6.
Meanwhile,
it
also
enables
triboelectric
nanogenerators
(PTSM-TENGs)
fabricated
silicone
rubber-encapsulated
hydrogels
to
have
energy
harvesting
efficiency,
instantaneous
output
power
density
54.24
mW/m2.
We
build
glove-based
human-computer
interaction
(HMI)
system
using
PTSM-TENGs.
multidimensional
signal
features
PTSM-TENG
are
extracted
analyzed
by
HMI
system,
functions
gesture
visualization
robot
hand
realized.
In
addition,
signals
can
be
used
for
object
recognition
help
machine
learning
techniques.
glove
based
achieves
classification
five
objects
through
contact,
accuracy
rate
98.7%.
Therefore,
strain
sensors
broad
application
prospects
man-machine
interface,
intelligent
systems,
auxiliary
other
fields
due
their
stretchable
self-healing
performance.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: April 13, 2023
Abstract
Multifunctional
supramolecular
ultra-tough
bionic
e-skin
with
unique
durability
for
human–machine
interaction
in
complex
scenarios
still
remains
challenging.
Herein,
we
develop
a
skin-inspired
tunable
mechanical
properties
by
physical
cross-linking
salting-freezing-thawing
method.
The
gelling
agent
(
β
-Glycerophosphate
sodium:
Gp)
induces
the
aggregation
and
binding
of
PVA
molecular
chains
thereby
toughens
them
(stress
up
to
5.79
MPa,
toughness
13.96
MJ
m
−3
).
Notably,
due
self-assembly,
hydrogels
can
be
fully
recycled
reprocessed
direct
heating
(100
°C
few
seconds),
tensile
strength
maintained
at
about
100%
after
six
recoveries.
hydrogel
integrates
transparency
(>
60%),
super
(up
,
bearing
1500
times
its
own
weight),
good
antibacterial
E.
coli
S.
aureus
),
UV
protection
(Filtration:
80%–90%),
high
electrical
conductivity
(4.72
S
−1
anti-swelling
recyclability.
not
only
monitor
daily
physiological
activities,
but
also
used
activities
underwater
message
encryption/decryption.
We
it
create
complete
finger
joint
rehabilitation
system
an
interactive
interface
that
dynamically
presents
user’s
health
status.
Our
multifunctional
electronic
skin
will
have
profound
impact
on
future
new
medical,
interaction,
VR/AR
metaverse
fields.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(9), P. 12350 - 12362
Published: Feb. 24, 2023
Conductive
hydrogels
are
ideal
for
flexible
sensors,
but
it
is
still
a
challenge
to
produce
such
with
combined
toughness,
self-adhesion,
self-healing,
anti-freezing,
moisturizing,
and
biocompatibility
properties.
Herein,
inspired
by
natural
skin,
highly
stretchable,
strain-sensitive,
multi-environmental
stable
collagen-based
conductive
organohydrogel
was
constructed
using
collagen
(Col),
acrylic
acid,
dialdehyde
carboxymethyl
cellulose,
1,3-propylene
glycol,
AlCl3.
The
resulting
exhibited
excellent
tensile
(strain
>800%),
repeatable
adhesion
(>10
times),
self-healing
[self-healing
efficiency
(SHE)
≈
100%],
anti-freezing
(-60
°C),
moisturizing
(>20
d),
biocompatible
This
also
possessed
good
electrical
conductivity
(σ
=
3.4
S/m)
strain-sensitive
properties
[GF
(gauge
factor)
13.65
the
maximal
strain
of
400%].
Notably,
had
considerable
low-temperature
performance
(SHE
88%
at
-24
°C)
rapid
underwater
property
92%,
time
<20
min).
type
sensor
could
not
only
accurately
continuously
monitor
large-scale
motions
human
body
provide
an
accurate
response
tiny
motions.
work
proposes
development
strategy
multifunctional
multiple
environmental
stability
provides
potential
research
value
construction
biomimetic
electronic
skin.
Inorganic Chemistry Frontiers,
Journal Year:
2023,
Volume and Issue:
10(15), P. 4358 - 4392
Published: Jan. 1, 2023
In
this
study,
the
preparation
methods
of
MXenes
and
layered
dihydroxides
(LDHs)
are
reviewed.
addition,
electrochemical
performances
for
supercapacitors
MXene/LDHs
composites
summarized
in
detail.
ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(7), P. 6875 - 6885
Published: March 30, 2023
Although
single-function
camouflage
under
infrared/visible
bands
has
made
great
advances,
it
is
still
difficult
for
materials
to
cope
with
the
synergy
detection
spanning
both
visible
and
infrared
spectra
adapt
complex
variable
scenarios.
Herein,
a
trilayer
composite
integrating
thermal
insulation,
heat
absorption,
solar/electro-thermal
conversions,
thermochromism
fabricated
dual
camouflages
by
combining
anisotropic
MXene/reduced
graphene
oxide
hybrid
aerogel
n-octadecane
phase
change
material
in
its
bottom
thermochromic
coating
on
upper
surface.
Benefiting
from
synergetic
heat-transfer
suppression
derived
insulation
of
porous
layer
absorption
phase-change
layer,
can
serve
as
cloak
hide
target
signatures
images
ambient
surroundings
during
day
jungle
at
night
all
scenes
assist
escaping
visual
surveillance
virtue
green
appearance.
For
desert
scenarios,
spontaneously
increase
surface
temperature
via
solar-thermal
energy
conversion,
merging
targets
into
high-temperature
surroundings;
meanwhile,
vary
color
original
yellow,
enabling
visually
disappear
sands
hills.
This
work
provides
promising
strategy
designing
adaptive
adjustable
integrated
counter
multiband
complicated
environments.
