Langmuir,
Год журнала:
2023,
Номер
39(45), С. 16199 - 16207
Опубликована: Окт. 31, 2023
The
conductive
hydrogel
as
a
flexible
sensor
not
only
has
certain
mechanical
flexibility
but
also
can
be
used
in
the
field
of
human
health
detection
and
human-computer
interaction.
Herein,
by
introduction
tannic
acid
(TA)
with
MXene
into
polyacrylamide
(PAM)/carboxymethyl
chitosan
(CMC)
double-network
hydrogel,
high
stretchability,
self-adhesion,
sensitivity
was
prepared.
CMC
PAM
form
semi-interpenetrating
toughness
durability
through
electrostatic
interactions
multiple
hydrogen
bonding
networks.
abundant
hydrophilic
functional
groups
on
TA
bonds
simultaneously
polymer
network,
ensuring
stretchability
hydrogel.
display
an
accurate
response
to
variety
stimulus
signals
monitor
both
joint
movements
small
physiological
signal
changes.
It
combined
deep
learning
algorithms
classify
handwritten
digits
accuracy
rate
98%.
This
work
promote
application
sensors
sensitivity.
combination
provides
important
ideas
for
further
development
devices.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(29)
Опубликована: Март 10, 2024
Abstract
The
practical
applications
of
aqueous
Zn/I
2
batteries
(AZIBs)
operating
within
a
wide
temperature
range
are
severely
hindered
by
the
uncontrolled
shutting
polyiodide
ions
(I
3
−
/
I
5
)
and
rampant
side
reactions.
In
this
study,
tolerant
polyanionic
hydrogel
(borax‐bacteria
cellulose
p
(AMPS‐AM))
with
ion
selective
permeability
is
designed
for
inhibiting
effect
reactions
under
extreme
temperatures
from
−50
to
50
°C.
zincophilic
R−SO
significantly
enhances
transport
Zn
2+
cations
promotes
uniform
growth
metal
along
(002)
plane.
Moreover,
abundant
hydrophilic
groups
in
hydrogels
effectively
suppress
both
hydrogen
evolution
reaction
formation
by‐products
reducing
water
reactivity.
Furthermore,
theoretical
calculations,
visualization
experiment
situ
Raman
spectroscopy
confirm
that
group
hinders
shuttle
process
/I
anions
through
electrostatic
repulsion.
Consequently,
gel
electrolyte
facilitates
ultra‐stable
full
cell
at
low
current
density
C
over
100
A
pouch
negative/positive
capacity
ratio
3.3
exhibits
stable
performance
350
cycles
an
impressive
high‐areal
2.03
mA
h
cm
−2
,
thereby
establishing
solid
foundation
its
applications.
ABSTRACT
Flexible
sensors
exhibit
the
properties
of
excellent
shape
adaptability
and
deformation
ability,
which
have
been
applied
for
environmental
monitoring,
medical
diagnostics,
food
safety,
smart
systems,
human–computer
interaction.
Cellulose‐based
hydrogels
are
ideal
materials
fabrication
flexible
due
to
their
unique
three‐dimensional
structure,
renewability,
ease
processing,
biodegradability,
modifiability,
good
mechanical
properties.
This
paper
comprehensively
reviews
recent
advances
cellulose‐based
in
construction
sensor
applications.
The
characteristics,
mechanisms,
advantages
prepared
by
physical
cross‐linking,
chemical
cross‐linking
respectively
analyzed
summarized
detail.
focus
then
turns
research
development
hydrogel
sensors,
including
sensing
(pressure/strain,
humidity/temperature,
optical
sensing),
(chromium,
copper,
mercury
ion
sensing,
toxic
gas
nitrite
biosensing
(glucose,
antibody,
cellular
sensing).
Additionally,
limitations
along
with
key
challenges
future
directions,
discussed.
It
is
anticipated
that
this
review
will
furnish
invaluable
insight
advancement
novel
green,
facilitate
integration
as
a
fundamental
component
multifunctional
technologies,
thereby
expediting
design
innovative
near
future.
Journal of Materials Chemistry B,
Год журнала:
2024,
Номер
12(25), С. 6190 - 6202
Опубликована: Янв. 1, 2024
Metal
organic
frameworks
(MOFs)
have
garnered
significant
attention
in
the
development
of
stretchable
and
wearable
conductive
hydrogels
for
flexible
transducers.
However,
MOFs
used
hydrogel
networks
been
hampered
by
low
mechanical
performance
poor
dispersibility
aqueous
solutions,
which
affect
hydrogels,
including
toughness,
limited
self-recovery,
short
working
ranges,
conductivity,
prolonged
response-recovery
times.
To
address
these
shortcomings,
a
novel
approach
was
adopted
micelle
co-polymerization
ACS Materials Letters,
Год журнала:
2024,
Номер
6(4), С. 1140 - 1150
Опубликована: Фев. 26, 2024
Conductive
organohydrogels
with
flexibility
and
biocompatibility
have
attracted
extensive
attention
in
bioelectronic
devices.
However,
poor
mechanical
properties
crack
propagation
resistance
severely
limited
their
applications.
Herein,
strong,
tough,
ionically
conductive
organogels
(ICOs)
outstanding
fatigue
are
prepared
based
on
simultaneous
construction
of
dense
cross-linked
polymer
network
numerous
crystalline
domains
during
the
solvent
exchange.
ICOs
show
excellent
tensile
strength
elongation
at
break
as
high
16.7
±
0.9
MPa
1112.4
120.3%,
respectively.
Moreover,
fracture
energy
threshold
can
reach
34.0
4.7
KJ/m2
561.3
59.6
J/m2,
respectively,
exhibiting
resistant
properties.
antifreezing
performance
used
for
strain
sensing
a
linear
working
up
to
80%
superior
cycling
stability,
ICO
sensor
monitor
various
body
motions.
The
mechanically
strong
antifatigue
promising
applications
flexible
smart
electronics
even
extreme
environments.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 16, 2025
Abstract
The
practical
development
of
aqueous
zinc‐iodine
(Zn‐I
2
)
batteries
is
greatly
hindered
by
the
low
energy
density
resulting
from
conventional
I
0
/I
−
conversion
and
limited
temperature
tolerance.
Here,
a
temperature‐insensitive
polycationic
hydrogel
electrolyte
borax‐bacterial
cellulose
/
p
(AM‐
co
‐VBIMBr)
(denoted
as
BAVBr)
for
achieving
an
energy‐dense
cascade
Zn‐I
battery
over
wide
range
−50
to
50
°C
designed.
A
comprehensive
investigation,
combining
advanced
spectroscopic
investigation
DFT
calculations,
has
revealed
that
presence
Br
species
in
gel
facilitates
reaction
/Br
.
Simultaneously,
it
activates
high
voltage
+
redox
through
interhalogen
formation.
Consequently,
sequential
highly
reversible
reactions
involving
,
are
achieved
with
assistance
−NR
3
units
BAVBr,
effectively
suppressing
hydrolysis
electrolyte.
lead
area
capacity
0.76
mAh
cm
−2
at
loading
1
mg
or
760
g
−1
based
on
mass
iodine,
demonstrating
exceptional
long‐term
cycling
stability
°C.
This
study
offers
valuable
insights
into
rational
design
electrolytes
high‐energy
batteries,
specifically
tailored
wide‐temperature
operation.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(38), С. 14094 - 14102
Опубликована: Сен. 14, 2023
As
a
member
of
the
dynamic
covalent
bond
family,
boronic
ester
has
attracted
increasing
attention
in
fabrication
hydrogels
because
it
can
occur
an
aqueous
system
at
room
temperature.
When
are
applied
as
soft
sensor,
role
bonding
is
well
defined,
namely,
functional
unit
endowing
with
multistimulus
responsiveness.
However,
this
also
limits
applications
hydrogels.
In
work,
heterogeneous
hydrogel
developed
which
simultaneously
acts
structural
and
responsive
units,
integrating
actuating
sensing
abilities
together.
The
bilayer
strategy
to
give
network
heterogeneity,
constructing
physical
cross-links
poly(vinyl
alcohol)
on
one
side,
whereas
building
dual
cross-links,
between
carboxymethyl
cellulose
together
other
side.
Therefore,
as-prepared
be
used
temperature-triggered
pH-triggered
actuators.
Moreover,
retains
strain
resistance
temperature
effects
homogeneous
flexible
sensor
monitoring
human
motions.
More
application
scenarios
working
modes
for
ester-bonded
unlocked.
