ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(15), С. 19435 - 19446
Опубликована: Апрель 10, 2023
Conductive
hydrogels
as
promising
candidates
of
wearable
electronics
have
attracted
considerable
interest
in
health
monitoring,
multifunctional
electronic
skins,
and
human-machine
interfaces.
However,
to
simultaneously
achieve
excellent
electrical
properties,
superior
stretchability,
a
low
detection
threshold
conductive
remains
an
extreme
challenge.
Herein,
ultrastretchable
high-conductivity
MXene-based
organohydrogel
(M-OH)
is
developed
for
human
monitoring
machine-learning-assisted
object
recognition,
which
fabricated
based
on
Ti3C2Tx
MXene/lithium
salt
(LS)/poly(acrylamide)
(PAM)/poly(vinyl
alcohol)
(PVA)
hydrogel
through
facile
immersion
strategy
glycerol/water
binary
solvent.
The
M-OH
demonstrates
remarkable
stretchability
(2000%)
high
conductivity
(4.5
S/m)
due
the
strong
interaction
between
MXene
dual-network
PVA/PAM
matrix
incorporation
LS,
respectively.
Meanwhile,
sensor
enables
with
sensitivity
limit
(12
Pa).
Furthermore,
pressure
mapping
image
recognition
technology,
8
×
pixelated
M-OH-based
sensing
array
can
accurately
identify
different
objects
accuracy
97.54%
under
assistance
deep
learning
neural
network
(DNN).
This
work
comprehensive
performances
high-conductive
would
further
explore
extensive
potential
application
prospects
personal
healthcare,
interfaces,
artificial
intelligence.
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Июнь 14, 2022
Hydrogels
are
investigated
broadly
in
flexible
sensors
which
have
been
applied
into
wearable
electronics.
However,
further
application
of
hydrogels
is
restricted
by
the
ambiguity
sensing
mechanisms,
and
multi-functionalization
systems
based
on
terms
cost,
difficulty
integration,
device
fabrication
remains
a
challenge,
obstructing
specific
scenarios.
Herein,
cost-effective,
structure-specialized
scenario-applicable
3D
printing
direct
ink
writing
(DIW)
technology
fabricated
two-dimensional
(2D)
transition
metal
carbides
(MXenes)
bonded
hydrogel
sensor
with
excellent
strain
temperature
performance
developed.
Gauge
factor
(GF)
5.7
(0
-
191%
strain)
high
sensitivity
(-5.27%
°C-1)
within
wide
working
range
80
°C)
can
be
achieved.
In
particular,
corresponding
mechanisms
clarified
finite
element
analysis
first
use
situ
temperature-dependent
Raman
for
hydrogels,
printed
realize
precise
indication
shape
memory
solar
array
hinge.
Materials Horizons,
Год журнала:
2023,
Номер
10(8), С. 2800 - 2823
Опубликована: Янв. 1, 2023
Hydrogels
have
been
attracting
increasing
attention
for
application
in
wearable
electronics,
due
to
their
intrinsic
biomimetic
features,
highly
tunable
chemical-physical
properties
(mechanical,
electrical,
etc.),
and
excellent
biocompatibility.
Among
many
proposed
varieties
of
hydrogels,
conductive
polymer-based
hydrogels
(CPHs)
emerged
as
a
promising
candidate
future
sensor
designs,
with
capability
realizing
desired
features
using
different
tuning
strategies
ranging
from
molecular
design
(with
low
length
scale
10-10
m)
micro-structural
configuration
(up
10-2
m).
However,
considerable
challenges
remain
be
overcome,
such
the
limited
strain
sensing
range
mechanical
strength,
signal
loss/instability
caused
by
swelling/deswelling,
significant
hysteresis
signals,
de-hydration
induced
malfunctions,
surface/interfacial
failure
during
manufacturing/processing.
This
review
aims
offer
targeted
scan
recent
advancements
CPH
based
technology,
establishment
dedicated
structure-property
relationships
lab
advanced
manufacturing
routes
potential
scale-up
production.
The
CPHs
sensors
is
also
explored,
suggested
new
research
avenues
prospects
included.
Bioactive Materials,
Год журнала:
2022,
Номер
22, С. 1 - 17
Опубликована: Сен. 23, 2022
The
electrical
microenvironment
plays
an
important
role
in
bone
repair.
However,
the
underlying
mechanism
by
which
stimulation
(ES)
promotes
regeneration
remains
unclear,
limiting
design
of
microenvironment-specific
electroactive
materials.
Herein,
simple
co-incubation
aqueous
suspensions
at
physiological
temperatures,
biocompatible
regenerated
silk
fibroin
(RSF)
is
found
to
assemble
into
nanofibrils
with
a
β-sheet
structure
on
MXene
nanosheets,
has
been
reported
inhibit
restacking
and
oxidation
MXene.
An
hydrogel
based
RSF
bioencapsulated
thus
prepared
promote
efficient
regeneration.
This
MXene/RSF
also
acts
as
piezoresistive
pressure
transducer,
can
potentially
be
utilized
monitor
electrophysiological
microenvironment.
RNA
sequencing
performed
explore
mechanisms,
activate
Ca2+/CALM
signaling
favor
direct
osteogenesis
process.
ES
facilitate
indirect
promoting
polarization
M2
macrophages,
well
stimulating
neogenesis
migration
endotheliocytes.
Consistent
improvements
angiogenesis
are
observed
hydrogels
under
vivo.
Collectively,
provides
distinctive
promising
strategy
for
osteogenesis,
regulating
immune
neovascularization
ES,
leading
re-establish
Flexible
triboelectric
nanogenerators
(TENGs)
have
attracted
increasing
interest
since
their
advent
in
2012.
In
comparison
with
other
flexible
electrodes,
hydrogels
possess
transparency,
stretchability,
biocompatibility,
and
tunable
ionic
conductivity,
which
together
provide
great
potential
as
current
collectors
TENGs
for
wearable
applications.
The
development
of
hydrogel-based
(H-TENGs)
is
currently
a
burgeoning
field
but
research
efforts
lagged
behind
those
common
TENGs.
order
to
spur
this
important
area,
comprehensive
review
that
summarizes
recent
advances
challenges
H-TENGs
will
be
very
useful
researchers
engineers
emerging
field.
Herein,
the
advantages
types
soft
conductors
are
presented,
followed
by
detailed
descriptions
advanced
functions,
enhanced
output
performance,
well
applications
H-TENGs.
Finally,
prospects
discussed.
Abstract
Conductive
hydrogels
as
promising
material
candidates
for
soft
electronics
have
been
rapidly
developed
in
recent
years.
However,
the
low
ionic
conductivity,
limited
mechanical
properties,
and
insufficient
freeze‐resistance
greatly
limit
their
applications
flexible
wearable
electronics.
Herein,
aramid
nanofiber
(ANF)‐reinforced
poly(vinyl
alcohol)
(PVA)
organohydrogels
containing
dimethyl
sulfoxide
(DMSO)/H
2
O
mixed
solvents
with
outstanding
are
fabricated
through
solution
casting
3D
printing
methods.
The
show
both
high
tensile
strength
toughness
due
to
synergistic
effect
of
ANFs
DMSO
system,
which
promotes
PVA
crystallization
intermolecular
hydrogen
bonding
interactions
between
molecules
well
PVA,
confirmed
by
a
suite
characterization
molecular
dynamics
simulations.
also
exhibit
ultrahigh
ranging
from
1.1
34.3
S
m
−1
at
−50
60
°C.
Building
on
these
excellent
organohydrogel‐based
strain
sensors
solid‐state
zinc–air
batteries
(ZABs)
fabricated,
broad
working
temperature
range.
Particularly,
ZABs
not
only
specific
capacity
(262
mAh
g
)
ultra‐long
cycling
life
(355
cycles,
118
h)
even
−30
°C,
but
can
work
properly
under
various
deformation
states,
manifesting
great
potential
robotics
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(1)
Опубликована: Сен. 19, 2023
Abstract
Conductive
hydrogels
(CHs)
for
flexible
bioelectronic
devices
have
raised
great
attention
due
to
their
tunable
mechanical
performances,
adhesion,
anti‐swelling,
and
biocompatibility.
This
review
summarizes
the
current
development
of
conductive
hydrogel‐based
in
aspect
classifications
applications.
Firstly,
are
classified
into
two
kinds
according
types
conductivity:
ionic
electronic
(hydrogel
based
on
pure
materials,
introducing
micro/nano‐materials).
Secondly,
applications
device,
like
wearable
(strain
sensor,
body
fluid
detector,
serviced
extreme
environment),
tissue
engineering
(skin,
heart,
nerve,
muscle),
other
(bionic
robot,
cancer
treatment),
highly
illustrated.
Finally,
a
depth
outlook
is
given,
which
aims
promote
this
field
future.
Advanced Materials,
Год журнала:
2023,
Номер
35(42)
Опубликована: Март 1, 2023
Abstract
Conductive
gels
are
developing
vigorously
as
superior
wearable
sensing
materials
due
to
their
intrinsic
conductivity,
softness,
stretchability,
and
biocompatibility,
showing
a
great
potential
in
many
aspects
of
lives.
However,
compared
wide
application
on
land,
it
is
significant
yet
rather
challenging
for
traditional
conductive
realize
under
water.
The
swelling
the
loss
components
aqueous
environment,
resulted
from
diffusion
across
interface,
lead
structural
instability
performance
decline.
Fortunately,
efforts
devoted
improving
water
resistance
employing
them
field
underwater
recent
years,
some
exciting
achievements
obtained,
which
significance
promoting
safety
efficiency
activities.
there
no
review
thoroughly
summarize
gels.
This
presents
brief
overview
representative
design
strategies
water‐resistant
diversified
applications
sensors.
Finally,
ongoing
challenges
further
also
discussed
along
with
recommendations
future.
