Polymers,
Journal Year:
2023,
Volume and Issue:
15(19), P. 4001 - 4001
Published: Oct. 5, 2023
The
rapid
development
of
tough
conductive
hydrogels
has
led
to
considerable
progress
in
the
fields
tissue
engineering,
soft
robots,
flexible
electronics,
etc.
Compared
other
kinds
traditional
sensing
materials,
have
advantages
flexibility,
stretchability
and
biocompatibility
due
their
biological
structures.
Numerous
hydrogel
sensors
been
developed
based
on
specific
demands
for
practical
applications.
This
review
focuses
sensors.
Representative
tactics
construct
strategies
fulfill
conductivity,
which
are
significance
fabricating
hydrogels,
briefly
reviewed.
Then,
diverse
presented
discussed.
Additionally,
recent
advancements
assembled
with
different
as
well
various
designed
structures
performances
demonstrated
detail.
Applications,
including
wearable
skins,
bionic
muscles
robotic
systems
these
hydrogel-based
resistive
capacitive
modes
Some
perspectives
also
stated
at
end.
will
provide
a
comprehensive
understanding
offer
clues
researchers
who
interests
pursuing
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: May 24, 2023
Abstract
Breathing
is
an
inherent
human
activity;
however,
the
composition
of
air
we
inhale
and
gas
exhale
remains
unknown
to
us.
To
address
this,
wearable
vapor
sensors
can
help
people
monitor
in
real
time
avoid
underlying
risks,
for
early
detection
treatment
diseases
home
healthcare.
Hydrogels
with
three-dimensional
polymer
networks
large
amounts
water
molecules
are
naturally
flexible
stretchable.
Functionalized
hydrogels
intrinsically
conductive,
self-healing,
self-adhesive,
biocompatible,
room-temperature
sensitive.
Compared
traditional
rigid
sensors,
hydrogel-based
humidity
directly
fit
skin
or
clothing,
more
suitable
real-time
monitoring
personal
health
safety.
In
this
review,
current
studies
on
investigated.
The
required
properties
optimization
methods
introduced.
Subsequently,
existing
reports
response
mechanisms
summarized.
Related
works
their
application
safety
presented.
Moreover,
potential
field
sensing
elucidated.
Finally,
research
status,
challenges,
future
trends
hydrogel
gas/humidity
discussed.
Small,
Journal Year:
2023,
Volume and Issue:
19(45)
Published: July 20, 2023
Biomimetic
flexible
electronics
for
E-skin
have
received
increasing
attention,
due
to
their
ability
sense
various
movements.
However,
the
development
of
smart
skin-mimic
material
remains
a
challenge.
Here,
simple
and
effective
approach
is
reported
fabricate
super-tough,
stretchable,
self-healing
conductive
hydrogel
consisting
polyvinyl
alcohol
(PVA),
Ti3
C2
Tx
MXene
nanosheets,
polypyrrole
(PPy)
(PMP
hydrogel).
The
nanosheets
Fe3+
serve
as
multifunctional
cross-linkers
stress
transfer
centers,
facilitate
considerable
high
conductivity,
super
toughness,
ultra-high
stretchability
(elongation
up
4300%)
PMP
with.
hydrogels
also
exhibit
rapid
repeatable
self-adhesive
capacity
because
presence
dynamic
borate
ester
bond.
capacitive
strain
sensor
made
by
shows
relatively
broad
range
sensing
(up
400%),
with
feature.
can
precisely
monitor
human
physiological
signals,
including
joint
movements,
facial
expressions,
pulse
waves.
hydrogel-based
supercapacitor
demonstrated
capacitance
retention
≈92.83%
coulombic
efficiency
≈100%.
Science Advances,
Journal Year:
2024,
Volume and Issue:
10(2)
Published: Jan. 10, 2024
Hydrogel-enabled
skin
bioelectronics
that
can
continuously
monitor
health
for
extended
periods
is
crucial
early
disease
detection
and
treatment.
However,
it
challenging
to
engineer
ultrathin
gas-permeable
hydrogel
sensors
self-adhere
the
human
long-term
daily
use
(>1
week).
Here,
we
present
a
~10-micrometer-thick
polyurethane
nanomesh-reinforced
sensor
continuous
high-quality
electrophysiological
monitoring
8
days
under
life
conditions.
This
research
involves
two
key
steps:
(i)
material
design
by
gelatin-based
thermal-dependent
phase
change
hydrogels
(ii)
robust
thinness
geometry
achieved
through
nanomesh
reinforcement.
The
resulting
exhibit
thickness
of
~10
micrometers
with
superior
mechanical
robustness,
high
adhesion,
gas
permeability,
anti-drying
performance.
To
highlight
potential
applications
in
treatment
leverage
collective
features,
demonstrate
long-term,
high-precision
conditions
up
days.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(35)
Published: June 21, 2024
Real-time
continuous
monitoring
of
non-cognitive
markers
is
crucial
for
the
early
detection
and
management
chronic
conditions.
Current
diagnostic
methods
are
often
invasive
not
suitable
at-home
monitoring.
An
elastic,
adhesive,
biodegradable
hydrogel-based
wearable
sensor
with
superior
accuracy
durability
real-time
human
health
developed.
Employing
a
supramolecular
engineering
strategy,
pseudo-slide-ring
hydrogel
synthesized
by
combining
polyacrylamide
(pAAm),
β-cyclodextrin
(β-CD),
poly
2-(acryloyloxy)ethyltrimethylammonium
chloride
(AETAc)
bio
ionic
liquid
(Bio-IL).
This
novel
approach
decouples
conflicting
mechano-chemical
effects
arising
from
different
molecular
building
blocks
provides
balance
mechanical
toughness
(1.1
×
10
Materials Today Bio,
Journal Year:
2023,
Volume and Issue:
20, P. 100636 - 100636
Published: April 15, 2023
Strontium
(Sr)
and
strontium
ranelate
(SR)
are
commonly
used
therapeutic
drugs
for
patients
suffering
from
osteoporosis.
Researches
have
showed
that
Sr
can
significantly
improve
the
biological
activity
physicochemical
properties
of
materials
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(4), P. 5208 - 5216
Published: Jan. 18, 2024
Hydrogels
are
widely
applied
in
the
flexible
wearable
electronic
devices
field
owing
to
their
skin-like
stretchability,
superb
biocompatibility,
and
high
conductivity
retention
under
mechanical
deformations.
Nevertheless,
hydrogels
prone
freezing
at
low
temperatures
losing
water
temperatures,
which
seriously
limits
practical
applications.
Herein,
a
binary
solvent
system
of
ionic
liquid
(1-ethyl-3-methylimidazolium
chloride)
was
prepared
endow
hydrogel
(0.28
S
m–1
25
°C),
transparency
(94.26%),
superior
tolerance
(−50
°C).
The
multiple
hydrogen
bonds
formed
among
polymer
chains,
water,
liquids
significantly
improved
properties
hydrogel,
enabling
excellent
tensile
(strain
>1800%)
durability
(1000
times
100%
strain).
Moreover,
further
assembled
into
dual-response
sensor,
exhibited
satisfactory
sensitivity
both
tension
(gauge
factor
=
2.15
200%
strain)
temperature
(temperature
coefficient
resistance
−1.845%/°C)
can
be
for
human
motion
body
monitoring.
This
study
provides
versatile
method
preparing
multifunctional
with
wide
range
applications
lays
groundwork
movement
detection
smart
health
care.
