ACS Applied Polymer Materials,
Journal Year:
2023,
Volume and Issue:
6(1), P. 806 - 816
Published: Dec. 19, 2023
Hydrogel-based
sensors
have
attracted
increasing
attention
as
fascinating
materials
for
various
applications
in
biomedicine
and
bioelectronics.
However,
the
application
of
strain
underwater
remains
a
great
challenge
due
to
swelling
hydrogels
an
aqueous
environment.
Herein,
we
report
coacervate
conductive
polyacrylamide/tannic
acid
(PAM/TA)
composite
hydrogel
with
strong
antiswellable
properties.
The
PAM/TA
exhibits
good
electrical
performance,
where
conductivity
is
found
be
2.7
×
10–4
S/cm,
which
stable
during
recycling,
excellent
stretchability
1000%
at
tensile
strength
1.5
MPa.
shows
biocompatibility
behavior
maintains
long-term
stability
monitor
human
movements.
In
addition,
environmentally
friendly
can
recycled
repeatedly.
antiswelling
stability,
remarkable
has
potential
wearable
sensors.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(28), P. 10578 - 10589
Published: July 6, 2023
Conductive
hydrogels
have
become
one
of
the
hot
topics
in
flexible
strain
sensors
owing
to
excellent
biocompatibility,
attractive
mechanical
flexibilities,
and
conductive
properties.
However,
time-consuming
preparation
their
unsuitable
properties
limit
application
low-temperature
environment
high
temperatures.
Here,
a
new
class
"deep
eutectic
solvent-in-water"
(DIWHs)
is
reported
for
first
time
through
one-step
gelation
process
situ
without
solvent
displacement,
fabricated
by
combining
hydrogel
with
deep
(DES).
The
DIWH
constructed
using
dynamic
oxidation
coordination
system
composed
sodium
lignosulfonate
(Ls)
Fe3+.
effect
DES
optimal
mass
ratio
water
on
was
synthetically
investigated.
addition
not
only
shortens
polymerization
8
s
enhances
but
also
provides
some
unique
For
example,
gives
gels
greater
self-healing
ability
antibacterial
When
1:3,
antifreezing
antidrying
were
imparted
gel,
elasticity
maintained
even
at
−80
°C
or
stored
60
7
days.
Furthermore,
exhibited
strong
interfacial
adhesion
natural
synthetic
materials
(up
kPa
glass)
due
presence
Ls
catechol
structure.
In
conclusion,
this
work
stimulates
more
interest
sustainable
high-value
utilization
fully
demonstrates
advantages
easy-to-prepare
coacervation
gel
sensing.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 10, 2024
Hydrogel-based
electronic
devices
in
aquatic
environments
have
sparked
widespread
research
interest.
Nevertheless,
the
challenge
of
developing
hydrogel
electronics
underwater
has
not
been
profoundly
surmounted
because
fragility
and
swelling
hydrogels
environments.
In
this
work,
a
zwitterionic
double
network
comprised
polyvinyl
alcohol
(PVA),
poly(sulfobetaine
methacrylate)
(PSBMA),
sulfuric
acid
(H
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(4), P. 4324 - 4335
Published: Feb. 9, 2024
Two-dimensional
transition
metal
carbides/nitrides
(MXenes)
show
great
potential
in
volatile
organic
compound
(VOC)
sensors
owing
to
their
exceptional
electrical
properties,
numerous
active
sites,
and
abundant
terminal
functional
groups.
However,
pure
MXene
Ti3C2Tx
is
prone
oxidative
degradation
under
ambient
environment,
the
insufficient
response
poor
stability
are
still
grand
challenges.
Hereby,
by
deliberately
introducing
oxide
semiconductor
multilayer
Ti3C2Tx,
a
promising
Ti3C2Tx/SnO2
sensor
with
excellent
long-term
outstanding
selectivity
developed
for
VOC
monitoring.
The
research
shows
that
hybrid
implements
efficient
detection
of
hydrogen-bonded
gases
especially
highly
ethanolamine
(EA).
sensitivity
EA
improved
over
10-fold
comparison
pristine
besides
good
12
different
VOCs.
synergistic
effects
n-n
nanoheterojunctions,
large
specific
surface
area
45.186
m2/g
mesoporous-rich
hierarchical
structure,
groups
together
facilitate
EA-sensitive
properties.
In
addition,
innovative
preparation
sensor,
which
takes
advantage
terpinol,
contributes
close
contact
on
ceramic
tubes,
thus
improving
sensitivity.
scientific
findings
this
work
may
provide
valuable
ideas
exploration
innovatively
composite
gas
sensors.
Advanced Materials Technologies,
Journal Year:
2024,
Volume and Issue:
9(9)
Published: March 11, 2024
Abstract
Conductive
hydrogel
is
considered
a
promising
wearable
sensor
material.
Developing
flexible
conductive
sensors
with
stretchability,
adhesion,
and
stability
remains
challenging.
In
this
study,
transparent,
self‐adhesive,
antifreeze,
anti‐UV,
stretchable,
conductive,
reusable
polyacrylamide/glycerol/gelatin/tannic
acid/Fe
3+
(PGGT‐Fe
)
structure
successfully
constructed
through
simple
one‐pot
polymerization
method.
The
PGGT‐Fe
composed
of
dual
networks
polyacrylamide
gelatin
for
organic
cross‐linking,
using
water/glycerol
as
the
dispersion
medium,
incorporates
viscous
substance:
tannic
acid,
metal
ions
(Fe
).
Due
to
introduction
abundant
amino,
carboxylic
hydroxyl
functional
groups
on
exhibits
excellent
repeatable
adhesion
capabilities
various
surfaces
(including
glass,
metal,
plastic,
pigskin)
maximum
strength
98
kPa
when
attached
pigskin.
Furthermore,
based
stable
network
high
conductivity,
not
only
strain
sensitivity,
fast
response,
but
also
can
stably
collect
epidermal
bio
signals.
conclusion,
work
provides
new
approach
design
development
next‐generation
multifunctional
hydrogels
opens
up
vast
possibilities
their
applications
in
electronics
field.
Real-time
thermal
sensing
through
flexible
temperature
sensors
in
extreme
environments
is
critically
essential
for
precisely
monitoring
chemical
reactions,
propellant
combustions,
and
metallurgy
processes.
However,
despite
their
low
response
speed,
most
existing
related
materials
will
degrade
or
even
lose
performances
at
either
high
temperatures.
Achieving
a
microsecond
time
over
an
ultrawide
range
remains
challenging.
Here,
we
design
sensor
that
employs
ultrathin
consecutive
Mo
1−
x
W
S
2
alloy
films
constructed
via
inkjet
printing
annealing
strategy.
The
elements
exhibit
broad
work
(20
to
823
K
on
polyimide
1,073
mica)
record-low
(about
30
μs).
These
properties
enable
the
detect
instantaneous
variations
induced
by
contact
with
liquid
nitrogen,
water
droplets,
flames.
Furthermore,
array
offers
spatial
mapping
of
arbitrary
shapes,
heat
conduction,
cold
traces
under
bending
deformation.
This
approach
paves
way
designing
unique
sensitive
transient
harsh
conditions.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(25), P. 32466 - 32480
Published: June 12, 2024
Multimodal
flexible
sensors,
consisting
of
multiple
sensing
units,
can
sense
and
recognize
different
external
stimuli
by
outputting
types
response
signals.
However,
the
recovery
recycling
multimodal
sensors
are
impeded
complex
structures
use
materials.
Here,
a
bimodal
sensor
that
strain
resistance
change
temperature
voltage
was
constructed
using
poly(vinyl
alcohol)
hydrogel
as
matrix
poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate)
(PEDOT:PSS)
material
due
to
its
conductivity
thermoelectric
effect.
The
plasticity
hydrogels,
along
with
simplicity
sensor's
components
structure,
facilitates
easy
recycling.
incorporation
citric
acid
ethylene
glycol
improved
mechanical
properties,
hysteresis,
antifreezing
properties
hydrogels.
exhibits
remarkable
strain,
characterized
high
sensitivity
(gauge
factor
4.46),
low
detection
limit
(0.1%),
fast
times,
minimal
excellent
stability.
Temperature
changes
induced
hot
air
currents,
objects,
light
cause
exhibit
sensitivity,
time,
good
Additionally,
variations
in
ambient
humidity
minimally
affect
response,
remains
unaffected
changes.
recycled
essentially
unchanged
for
temperature.
Finally,
applied
monitor
body
motion,
robots
stimuli.
