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
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(25)
Published: March 19, 2022
Abstract
One
of
the
key
challenges
in
developing
gel‐based
electronics
is
to
achieve
a
robust
sensing
performance,
by
overcoming
intrinsic
weaknesses
such
as
unwanted
swelling
induced
deformation,
signal
distortion
caused
dehydration,
and
large
hysteresis
signal.
In
this
work,
structural
gel
composite
(SGC)
approach
presented
encapsulating
conductive
hydrogel/MXene
with
lipid
(Lipogel)
layer
through
an
situ
polymerization.
The
hydrophobic
Lipogel
coating
fulfills
SGC
unique
anti‐swelling
property
at
aqueous
environment
excellent
dehydration
feature
open‐air,
thus
leading
long‐term
ultra‐stability
(over
90
days)
durability
2000
testing
cycles)
for
underwater
mechanosensing
applications.
As
result,
based
mechanoreceptor
demonstrates
high
stable
sensitivity
(GF
14.5).
Moreover,
several
conceptual
sensors
are
developed
unveil
their
profound
potential
monitoring
human
motions,
waterproof
anti‐counterfeiting
application,
tactile
trajectory
tracking.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(27)
Published: April 28, 2022
The
practical
applications
of
skin-interfaced
sensors
and
devices
in
daily
life
hinge
on
the
rational
design
surface
wettability
to
maintain
device
integrity
achieve
improved
sensing
performance
under
complex
hydrated
conditions.
Various
bio-inspired
strategies
have
been
implemented
engineer
desired
for
varying
Although
bodily
fluids
can
negatively
affect
performance,
they
also
provide
a
rich
reservoir
health-relevant
information
sustained
energy
next-generation
stretchable
self-powered
devices.
As
result,
manipulation
are
critical
effectively
control
liquid
behavior
enhanced
performance.
with
engineered
collect
analyze
health
biomarkers
while
being
minimally
affected
by
or
ambient
humid
environments.
harvesters
benefit
from
powering
on-body
electronics.
In
this
review,
we
first
summarize
commonly
used
approaches
tune
target
toward
By
considering
existing
challenges,
discuss
opportunities
as
small
fraction
potential
future
developments,
which
lead
new
class
use
digital
personalized
medicine.
Small,
Journal Year:
2021,
Volume and Issue:
17(24)
Published: May 19, 2021
Abstract
Hydrogel‐based
electronics
have
found
widespread
applications
in
soft
sensing
and
health
monitoring
because
of
their
remarkable
biocompatibility
mechanical
features
similar
to
human
skin.
However,
they
are
subjected
potential
challenges
like
structural
failure,
functional
degradation,
device
delamination
practical
applications,
especially
facing
extreme
environmental
conditions
(e.g.,
abnormal
temperature
humidity).
To
address
these,
ionically
conductive
organohydrogel‐based
developed,
which
can
perform
at
subzero
elevated
temperatures
(thermal
compatibility)
as
well
dehydrated
hydrated
environments
(hydration
for
extended
applications.
More
specifically,
gelatin/poly(acrylic
acid–
N
‐hydrosuccinimide
ester)
(PAA–NHS
ester)‐based
ionic‐conductive
organohydrogel
is
synthesized.
By
introducing
a
glycerol–water
binary
solvent
system,
the
gel
maintain
softness
wide
range
(from
−80
60
°C).
Besides,
excellent
conductivity
achieved
under
various
by
soaking
into
lithium
chloride
anhydrous
(LiCl)
solution.
Strong
adhesion
with
skin,
even
water,
be
realized
covalent
bonds
between
NHS
ester
from
amino
groups
The
performances
LiCl‐loaded
PAA‐based
(L‐PAA‐OH)‐based
further
demonstrated
freezing
high
underwater
conditions,
unveiling
promising
prospects
wearable
conditions.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(8), P. 4693 - 4763
Published: Feb. 8, 2023
Fibers,
originating
from
nature
and
mastered
by
human,
have
woven
their
way
throughout
the
entire
history
of
human
civilization.
Recent
developments
in
semiconducting
polymer
materials
further
endowed
fibers
textiles
with
various
electronic
functions,
which
are
attractive
applications
such
as
information
interfacing,
personalized
medicine,
clean
energy.
Owing
to
ability
be
easily
integrated
into
daily
life,
soft
fiber
electronics
based
on
polymers
gained
popularity
recently
for
wearable
implantable
applications.
Herein,
we
present
a
review
previous
current
progress
polymer-based
electronics,
particularly
focusing
smart-wearable
areas.
First,
provide
brief
overview
viewpoint
basic
concepts
functionality
requirements
different
devices.
Then
analyze
existing
associated
devices
interfaces,
healthcare
energy
conversion
storage.
The
working
principle
performance
summarized.
Furthermore,
focus
fabrication
techniques
Based
continuous
one-dimensional
yarn,
introduce
two-
three-dimensional
fabric
fabricating
methods.
Finally,
challenges
relevant
perspectives
potential
solutions
address
related
problems.
npj Flexible Electronics,
Journal Year:
2022,
Volume and Issue:
6(1)
Published: March 3, 2022
Abstract
Flexible
electronics
(FEs)
with
excellent
flexibility
or
foldability
may
find
widespread
applications
in
the
wearable
devices,
artificial
intelligence
(AI),
Internet
of
Things
(IoT),
and
other
areas.
However,
widely
utilization
also
bring
concerning
for
fast
accumulation
electronic
waste.
Green
FEs
good
degradability
might
supply
a
way
to
overcome
this
problem.
Starch,
as
one
most
abundant
natural
polymers,
has
been
exhibiting
great
potentials
development
environmental-friendly
due
its
inexpensiveness,
processability,
biodegradability.
Lots
remarks
were
made
field
but
no
summary
was
found.
In
review,
we
discussed
preparation
starch-based
FEs,
highlighting
role
played
by
starch
such
impacts
on
properties.
Finally,
challenge
outlook
further
presented.
Journal of Materials Chemistry A,
Journal Year:
2023,
Volume and Issue:
11(33), P. 17336 - 17372
Published: Jan. 1, 2023
The
emerging
smart
fibers
and
textiles
have
been
regarded
as
ideal
building
blocks
to
weave
flexible
wearable
electronics,
which
hold
great
promise
in
the
upcoming
artificial
intelligence
(AI)
Internet
of
Things
(IoT)
era.
