Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(17), P. 8141 - 8158
Published: Aug. 15, 2024
The
development
of
biomimetic
electronic
skin
(e-skin)
has
significant
value
in
many
fields,
including
health
monitoring,
soft
robotics,
wearable
devices,
and
human-machine
interaction.
As
a
potential
candidate
for
e-skin,
the
application
conductive
hydrogel
is
limited
by
factors,
such
as
complicated
fabrication
process,
insufficient
mechanical
performance,
poor
environmental
stability,
difficulty
degradation.
Here,
we
adopted
top-down
strategy
to
construct
multifunctional
collagen
fiber-derived
organohydrogel
which
fiber
scaffold
goatskin
was
filled
with
polyacrylamide
network.
This
displayed
excellent
fracture
stress
(2.87
MPa)
strain
(542%).
It
could
maintain
its
multifunctionality
even
at
−20
°C
after
long-term
storage.
Additionally,
this
demonstrated
considerable
adhesion
antibacterial
properties,
allowing
it
conform
closely
human
without
causing
bacterial
infection.
e-skin
sensors,
assembled
organohydrogel,
possessed
multiple
stimuli-responsive
modes
achieve
strain,
humidity,
temperature,
bioelectric
responsiveness,
precise
monitoring
body
movements,
facial
expressions,
voice
communication,
physiological
signals.
Notably,
discarded
be
effectively
degraded
under
natural
conditions.
In
brief,
study
gives
new
opinions
about
intelligent
demonstrates
pathway
high-value
utilization
animal
skin.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(34), P. 40975 - 40990
Published: Aug. 16, 2023
Conductive
hydrogels
have
attracted
tremendous
interest
in
the
construction
of
flexible
strain
sensors
and
triboelectric
nanogenerators
(TENGs)
owing
to
their
good
stretchability
adjustable
properties.
Nevertheless,
how
simultaneously
achieve
high
transparency,
self-healing,
adhesion,
antibacterial,
anti-freezing,
anti-drying,
biocompatibility
properties
through
a
simple
method
remains
challenge.
Herein,
transparent,
freezing-tolerant,
multifunctional
organohydrogel
(PAOAM-PDO)
as
electrode
for
TENGs
was
constructed
free
radical
polymerization
1,3-propanediol
(PDO)/water
binary
solvent
system,
which
oxide
sodium
alginate,
aminated
gelatin,
acrylic
acid,
AlCl3
were
used
raw
materials.
The
obtained
PAOAM-PDO
exhibited
transparency
(>90%),
adhesiveness,
antibacterial
property,
conductivity
(1.13
S/m),
long-term
environmental
stability.
introduction
PDO
endowed
with
freezing
resistance
low
point
-60
°C,
could
serve
protective
skin
barrier
prevent
frostbite
at
temperature.
be
assembled
monitor
heterogeneous
human
movements
sensitivity
(gauge
factor
7.05,
=
233%).
Meanwhile,
further
fabricated
TENG
"sandwich"
structure
single
mode.
Moreover,
resulting
achieved
electrical
outputs
hand
tapping
served
self-powered
device
light
light-emitting
diodes.
This
work
displays
feasible
strategy
build
environment-tolerant
organohydrogels,
possess
potential
applications
wearable
electronics
devices.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(4), P. 3720 - 3732
Published: Jan. 18, 2024
Piezoelectric
hydrogel
sensors
are
becoming
increasingly
popular
for
wearable
sensing
applications
due
to
their
high
sensitivity,
self-powered
performance,
and
simple
preparation
process.
However,
conventional
piezoelectric
hydrogels
lack
antifreezing
properties
thus
confronted
with
the
liability
of
rupture
in
low
temperatures
owing
use
water
as
dispersion
medium.
Herein,
a
kind
organohydrogel
that
integrates
piezoelectricity,
low-temperature
tolerance,
mechanical
robustness,
stable
electrical
performance
is
reported
by
using
poly(vinylidene
fluoride)
(PVDF),
acrylonitrile
(AN),
acrylamide
(AAm),
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(13)
Published: Dec. 14, 2023
Abstract
Artificial
electronic
skin
(E‐skin),
a
class
of
promising
materials
mimicking
the
physical‐chemical
and
sensory
performance
human
skin,
has
gained
extensive
interest
in
field
health‐monitoring
robotic
skins.
However,
developing
E‐skin
simultaneously
achieving
high
resilience,
hysteresis‐free,
absent
external
power
is
always
formidable
challenge.
Herein,
liquid‐free
eutectic
gel‐based
self‐powered
with
fatigue
resistance,
conductivity
prepared
by
introducing
hydroxypropyl
cellulose
(HPC)
into
metal
salt‐based
deep
solvents
(MDES).
The
unique
structural
design
cellulose‐anchored
permanent
entangled
poly(acrylic
acid)
(PAA)
chain,
combination
rapid
broken/reconstruction
dense
dynamic
sacrificial
bonds,
realizes
fabrication
high‐elastic
negligible
hysteresis.
This
further
demonstrates
practical
application
cellulose‐based
eutectogel
transmittance
(92%),
(36.6
mS
m
−1
),
resilience
(98.1%),
excellent
environment
stability
robust
triboelectric
nanogenerator
for
energy
harvesting
health‐caring
human‐machine
interaction.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(32)
Published: May 6, 2024
Abstract
Conductive
hydrogels
are
gaining
significant
attention
as
promising
candidates
for
the
fabrication
materials
flexible
electronics.
Nevertheless,
improving
tensile
properties,
hysteresis,
durability,
adhesion,
and
electrochemical
properties
of
these
remains
challenging.
This
work
reports
development
a
novel
semi‐interpenetrating
network
poly(ionic
liquid)
hydrogel
named
PATV,
via
in
situ
polymerization
acrylamide,
N
‐[Tris(hydroxymethyl)methyl]
1‐vinyl‐3‐butylimidazolium
tetrafluoroborate.
The
density
functional
theory
calculations
reveal
that
acts
physical
cross–linking
points
to
construct
hydrogen‐bond
networks.
Furthermore,
networks
dissipate
energy
efficiently
quickly,
thus
stress
concentration
hysteresis
avoided.
prepared
has
low
(9%),
high
(900%),
fast
response
(180
ms),
sensitivity
(gauge
factor
=
10.4,
pressure
0.14
kPa
−1
),
wide
sensing
range
(tensile
range:
1–600%,
compression
0.1–20
kPa).
A
multifunctional
sensor
designed
based
on
enables
real‐time,
rapid,
stable
response‐ability
detection
human
movement,
facial
expression
recognition,
pronunciation,
pulse,
handwriting,
Morse
code
encryption.
assembled
triboelectric
nanogenerator
displays
an
excellent
harvesting
capability,
highlighting
its
potential
application
self‐powered
wearable
electronic
devices.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(31)
Published: May 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.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(16)
Published: Jan. 2, 2024
Abstract
Wearable
electronics
based
on
conductive
hydrogels
(CHs)
easily
suffer
from
prolonged
response
times,
reduced
wearing
comfort,
shortened
service
lives,
and
impaired
signal
accuracy
in
cold
environments,
because
conventional
CHs
tend
to
freeze
at
subzero
temperatures
lose
their
flexibility,
adhesion,
transparency,
conductivity,
which
will
limit
applications
extreme
environments.
Inspired
by
the
way
psychrotolerant
creatures
superabsorbent
materials
interfere
with
hydrogen
bonding
networks
of
water,
a
freeze‐resistant
organohydrogel
(COH)
is
facilely
fabricated.
The
synergy
effect
between
charged
polar
terminal
groups
binary
solvent
system
water–ethylene
glycol
weakens
water
molecules
endows
COH
remarkable
freezing
tolerance
(−78
°C).
Additionally,
obtained
ultra‐stretchable
(≈6185%),
tough
(9.2
MJ
m
−3
),
highly
transparent
(≈99%),
self‐adhesive
(10.2–27.8
kPa),
biocompatible.
This
versatile
assembled
into
strain
sensor
well‐designed
bracelet
electrocardiogram
sensor.
Benefiting
exceptional
low‐temperature
prepared
COH,
these
devices
exhibit
fast
delay‐free
signals
even
−40
°C.
Overall,
this
work
proposes
strategy
develop
multifunctional
COHs
for
supporting
human
health
