Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(23)
Published: Feb. 9, 2024
Abstract
Despite
recent
advances
in
colloidal
hydrogels,
designing
general
and
robust
strategies
that
enable
the
controlled
fabrication
of
hydrogels
with
strong
mechanical
properties
still
proves
challenging.
Herein,
statistical
copolymerization‐induced
self‐assembly
(
stat
‐PISA)
monomers
hydrogen
bonding
ability
is
developed
as
a
strategy
for
high
stretchability,
anti‐swelling,
self‐healing
abilities.
This
concept
first
verified
by
dispersion
copolymerization
acrylic
acid
diacetone
acrylamide,
yielding
copolymer
particles
further
coalesced
into
3D
network
due
to
interactions
hydrophobic
microdomains
on
surface.
Both
microstructure
can
be
readily
regulated
varying
‐PISA
formulation.
Besides,
hydrogel
selective
dye
adsorbent,
excellent
selectivity
positively
charged
dyes.
Due
its
anti‐swelling
property,
evaluated
flexible
strain
sensor
motion
detection
underwater.
The
broad
feasibility
this
demonstrated
three
additional
formulations,
which
all
yielded
good
properties.
anticipated
inspire
design
mechanics
tailor‐made
functionality,
broaden
potential
applications
hydrogels.
Small,
Journal Year:
2023,
Volume and Issue:
20(19)
Published: Dec. 6, 2023
Abstract
Synthetic
hydrogel
strain
sensors
rarely
exhibit
a
comprehensive
combination
of
mechanical
properties
such
as
ultra‐stretchability,
ultrafast
self‐healing,
and
high
sensitivity.
Herein,
seven
small
molecule
enhanced
behaviors
polymer‐cluster
based
hydrogels
are
demonstrated.
The
oxidized
polyethyleneimine/polymeric
acrylic
acid
(ohPEI/PAA)
with
aromatic
formic
acids
supramolecular
cross‐linkers
prepared
by
simultaneous
formation
ohPEI
polymer
clusters
PAA
upon
the
addition
ammonium
persulfate.
optimized
adhesive
exhibits
excellent
properties,
extensibility
(up
to
12
298%),
real‐time
self‐healing
capability
(<1
s,
93%
efficiency),
uniformity,
underwater
adhesivity,
water‐sealing
ability.
proper
binding
strength
skin
(47
kPa)
allows
be
utilized
highly
sensitive
(gauge
factor:16.08),
conductive
(2.58
mS
cm
−1
),
sensors.
Specially,
wood
after
dehydration
is
extremely
high,
reaching
up
29.59
MPa.
Additionally,
when
glycerol
introduced,
obtained
gel
maintains
physical
even
at
harsh‐temperature
conditions
(−40
80
°C).
It
presents
that
multiple
hierarchical
non‐covalent
interactions
including
hydrogen
bonding
interactions,
π–π
stacking,
electrostatic
dipole–dipole
clusters,
allow
for
energy
dissipation
contribute
performance
hydrogel.
Gels,
Journal Year:
2024,
Volume and Issue:
10(2), P. 144 - 144
Published: Feb. 14, 2024
Conductive
hydrogels,
characterized
by
their
excellent
conductivity
and
flexibility,
have
attracted
widespread
attention
research
in
the
field
of
flexible
wearable
sensors.
This
paper
reviews
application
progress,
related
challenges,
future
prospects
conductive
hydrogels
Initially,
basic
properties
classifications
are
introduced.
Subsequently,
this
discusses
detail
specific
applications
different
sensor
applications,
such
as
motion
detection,
medical
diagnostics,
electronic
skin,
human–computer
interactions.
Finally,
challenges
summarized.
Overall,
exceptional
performance
multifunctionality
make
them
one
most
important
materials
for
technologies.
However,
further
innovation
needed
to
overcome
faced
realize
wider
Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(3), P. 1318 - 1332
Published: Feb. 1, 2024
Functionalized
hydrogels
integrating
soft
nature
and
electrical
properties
are
of
great
significance
for
the
development
human–machine
interfaces,
smart
wearable
devices,
biomimetics
robotics.
However,
hydrogel-based
flexible
sensors
inevitably
utilized
in
aquatic
environments,
resulting
swelling-induced
inferior
mechanical
performance,
skin-component
delamination,
monitoring
malfunction.
Herein,
a
multiple
dynamic-bond-driven
hydrophobic
association
hydrogel
with
reliable
water
resistance,
robustness,
stable
property
is
proposed
via
"two-step"
method
including
micellar
copolymerization
postsoaking
strategy.
Benefiting
from
electrostatic
interacted
segments
formed
by
myristyl
methacrylate
presence
cetyltrimethylammonium
bromide
micelles,
transparent
exhibits
desirable
antiswelling
feature,
excellent
stretchability
(∼1500%
elongation),
toughness
(∼2.4
MJ·m–3).
The
synergistic
mechanisms
ultrasound
dispersion
endow
repeatable
wet-adhesion
behaviors.
Moreover,
as-prepared
possesses
significant
conductivity
storage
durability
owing
to
chitosan
chain
entanglements,
interactions,
strong
hydrogen
bonding
established
sodium
phytate.
As
demonstration,
sensor
fabricated
transmit
various
human
movement
signals
wirelessly
monitor
electrocardiography
both
air
underwater
based
on
its
wide
sensing
range
(∼500%)
linear
sensitivity.
This
study
offers
an
effective
strategy
developing
electronic
systems
amphibious
scenarios.
InfoMat,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 13, 2025
Abstract
Hydrogel‐based
sensors
are
recognized
as
key
players
in
revolutionizing
robotic
applications,
healthcare
monitoring,
and
the
development
of
artificial
skins.
However,
primary
challenge
hindering
commercial
adoption
hydrogel‐based
is
their
lack
high
stability,
which
arises
from
water
content
within
hydrogel
structure,
leading
to
freezing
at
subzero
temperatures
drying
issues
if
protective
layer
compromised.
These
factors
result
a
significant
decline
benefits
offered
by
aqueous
gel
electrolytes,
particularly
terms
mechanical
properties
conductivity,
crucial
for
flexible
wearable
electronics.
Previous
reports
have
highlighted
several
disadvantages
associated
with
using
cryoprotectant
co‐solvents
lower
ion‐doped
anti‐freezing
sensors.
In
this
study,
design
optimization
photocrosslinkable
ionic
utilizing
silk
methacrylate
novel
natural
crosslinker
presented.
This
innovative
demonstrates
significantly
enhanced
properties,
including
stretchability
(>1825%),
tensile
strength
(2.49
MPa),
toughness
(9.85
MJ
m
–
3
),
resilience
(4%
hysteresis),
compared
its
non‐ion‐doped
counterpart.
Additionally,
exhibits
exceptional
nonfreezing
behavior
down
−85°C,
anti‐drying
functional
stability
up
2.5
years,
signal
drift
only
5.35%
over
2450
cycles,
whereas
control
variant,
resembling
commonly
reported
hydrogels,
149.8%.
The
successful
application
developed
advanced
robotics,
combined
pioneering
demonstration
combinatorial
commanding
single
sensor,
could
potentially
revolutionize
sensor
design,
elevating
it
next
level
benefiting
various
fields.
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