Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 8, 2024
Abstract
Hydrogels/organohydrogels
show
promise
for
flexible,
intelligent
electromagnetic
interference
(EMI)
shielding,
yet
simultaneously
achieving
absorption‐dominated
shielding
performance,
excellent
mechanical
properties
and
multi‐mode
responsiveness
remains
challenging.
This
study
presents
a
microcapacitor
network
strategy
as
an
alternative
to
the
traditional
conductive
percolation
EMI
materials.
Paraffin‐nanoclay/MXene
core‐shell
microspheres
are
uniformly
integrated
into
hydrogel
matrix
via
in
situ
polymerization,
forming
where
microsphere
shells
serve
capacitor
plates
dielectric
layers,
respectively.
Microcurrents
interfacial
polarization
at
plates,
along
with
dipole
within
layer,
significantly
promote
EM
wave
attenuation
(absorption
coefficient
>0.7).
Meanwhile,
abundant
hydrogen
bonds
paraffin
phase
synergistically
enhance
strength
(≈0.64
MPa)
stretchability
(elongation
break
>
1000%).
Due
solid‐liquid
transition
of
microspheres,
organohydrogel
exhibits
unique
ability
retain
high‐temperature
performance
room
temperature.
feature
enhances
room‐temperature
effectiveness
enables
responsiveness.
Under
same
deformation
mode,
it
programmable
regulation
response
different
external
stimuli,
following
changes
or
simulating
changes.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 26, 2024
Abstract
Wearable
strain
sensors,
capable
of
continuously
detecting
human
movements,
hold
great
application
prospects
in
sign
language
gesture
recognition
to
alleviate
the
daily
communication
barriers
deaf
and
mute
community.
However,
unsatisfactory
sensing
performance
(such
as
low
sensitivity,
narrow
detection
range,
etc.)
wearing
discomfort
severely
hinder
their
practical
application.
Here,
high‐performance
breathable
hydrogel
sensors
are
proposed
by
introducing
an
adjustable
localized
crack
a
closed‐loop
connected
fiber
encapsulated
porous
elastomer
films.
Upon
loading/unloading
external
strain,
dynamic
opening/closing
pre‐cut
causes
rapid
switching
conductive
path,
resulting
sharp
changes
resistance
high
sensitivity.
Consequently,
hydrogel‐based
crack‐effect
sensor
exhibits
superb
sensitivity
(GF
up
3930),
broad
range
(from
0.02%
80%),
fast
response/recovery
time
(78/52
ms),
repeatability,
structural
stability.
Based
on
capability
accurately
detect
various
strains
across
full
wireless
system
is
developed
achieve
accuracy
98.1%
encoding
decoding
gestures
with
assistance
machine
learning,
providing
robust
platform
for
efficient
intelligibility
barrier‐free
communication.
ACS Sensors,
Год журнала:
2024,
Номер
9(8), С. 4216 - 4226
Опубликована: Июль 28, 2024
Thermoelectric
(TE)
hydrogels,
mimicking
human
skin,
possessing
temperature
and
strain
sensing
capabilities,
are
well-suited
for
human-machine
interaction
interfaces
wearable
devices.
In
this
study,
a
TE
hydrogel
with
high
toughness
responsiveness
was
created
using
the
Hofmeister
effect
current
effect,
achieved
through
cross-linking
of
PVA/PAA/carboxymethyl
cellulose
triple
networks.
The
facilitated
by
Na
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(38), С. 25622 - 25642
Опубликована: Янв. 1, 2024
Here
in
this
review,
we
systematically
analyze
the
design
principles
of
MXene
hydrogels
for
next-generation
wearable
sensors.
Emphasis
is
placed
on
multiple
sensors
based
electrical/mechanical
enhancement
hydrogel
network.
Smart
hydrogel
sensors
with
intrinsic
responsiveness,
such
as
pH,
temperature,
humidity,
and
other
external
stimuli,
possess
broad
applications
in
innumerable
fields
biomedical
diagnosis,
environmental
monitoring,
wearable
electronics.
However,
it
remains
a
great
challenge
to
develop
structural
hydrogels
that
simultaneously
body
temperature-responsive,
adhesion-adaptable,
transparency-tunable.
Herein,
an
innovative
skin-mountable
thermo-responsive
is
fabricated,
which
endows
tunable
optical
properties
switchable
adhesion
at
different
temperatures.
Interestingly,
able
exhibit
lower
critical
solution
temperature
(LCST)
adapt
the
human
by
altering
acrylic
acid(AAc)
content
network.
The
also
displays
high
transparency
strong
low
temperatures,
while
becomes
opaque
feeble
Furthermore,
highly
sensitive
sensor
array
structure
constructed
harnessing
vat
photopolymerization
three-dimensional
(3D)
printing.
As
proof
of
concept,
attached
back
hand
capable
detecting
strain
differences,
integrating
high-temperature
monitoring
alarm
functions
visual
alteration.
This
work
provides
advanced
manner
fabricate
structured
responsive
hydrogels,
have
potential
application
prospects
field
smart
medical
patches
devices.
Advanced Healthcare Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 9, 2025
To
overcome
the
limitations
of
precise
monitoring
and
inefficient
wound
exudate
management
in
healing,
an
advanced
multifunctional
hydrogel
electronics
(MHE)
platform
based
on
MXene@MOF/Fe3O4@C
photonic
crystal
is
developed.
This
combines
optical/electrical
sensing,
synergistic
therapy,
real-time
visual
into
a
single,
efficient
system,
offering
comprehensive
solution
for
healing.
Under
photothermal
stimulation,
releases
metal
ions
that
generate
hydroxyl
radicals,
effectively
eliminating
antibiotic-resistant
bacteria.
Beyond
its
antibacterial
efficacy,
this
system
offers
unprecedented
through
temperature-responsive
visualization,
while
structural
color
changes
upon
absorption
provide
clear
indication
dressing
replacement.
By
integrating
these
functionalities,
MHE
allows
control
therapeutic
process,
significantly
improving
healing
treatment
monitoring.
The
platform's
sensing
capabilities
further
broaden
potential
applications
across
other
biomedical
fields.
breakthrough
technology
provides
clinicians
with
powerful
tool
to
optimize
outcomes,
marking
major
advancement
care
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 16, 2025
Abstract
Interfacial
gel
compliance
is
essential
for
the
stable
monitoring
of
physiological
electrical
signals.
Current
materials
often
fail
to
maintain
operation
at
skin
interface,
which
subject
constant
change,
due
an
inadequate
balance
viscoelastic
properties.
In
this
study,
a
dynamic
adaptive
network
involving
metal
coordination
with
hierarchical
hydrogen
bonding
developed.
The
multilayered
supramolecular
structure
has
enabled
polymer
chains
generate
new
physical
entanglements
upon
dissociation.
This
cross‐linking
allows
eutectogel
sustain
viscosity
and
elasticity
across
broad
frequency
range
(10
−7
–340
Hz).
Furthermore,
metal‐based
exhibits
enhanced
stretchability
(1800%),
good
conductivity
(125
mS
m
−1
),
wide
operating
temperature
(−70–100
°C),
strong
interfacial
adhesion.
offers
superior
stability
in
acquisition
signals
when
compared
standard
commercial
gels.
Viable
application
resultant
strain
sensors
demonstrated
human–machine
interaction
(HMI)
virtual
reality
(VR)
haptic
interaction.
addition,
convolutional
neural
(CNN)
algorithm
employed
develop
intelligent
system
evaluating
motion
states
using
surface
electromyography
(sEMG)
signals,
achieving
accuracy
94.1%.
Frontiers in Bioengineering and Biotechnology,
Год журнала:
2025,
Номер
13
Опубликована: Март 18, 2025
Bone
defects
caused
by
trauma,
tumor
resection,
and
surgery
present
significant
clinical
challenges,
often
resulting
in
complications
such
as
delayed
union,
nonunion,
even
long-term
functional
impairment.
Current
treatments,
including
autografts
allografts,
are
limited
donor
site
morbidity,
immune
rejection,
pathogen
transmission,
highlighting
the
need
for
developing
reliable
synthetic
alternatives.
To
address
these
we
report
a
binary
composite
hydrogel
combining
gelatin
methacryloyl
(GelMA)
κ-Carrageenan,
reinforced
with
calcium
phosphate
cements
(CPC).
GelMA
ensures
rapid
gelation
biocompatibility,
κ-carrageenan
improves
injectability,
CPC
enhances
mechanical
strength
osteogenic
activity,
collectively
creating
robust
versatile
system.
Furthermore,
hydrogel's
injectable,
adaptive,
self-healing
characteristics
enable
it
to
conform
irregular
bone
defect
sites,
providing
support
stimulation.
It
also
releases
bioactive
components
accelerate
regeneration.
With
exceptional
toughness
resilience,
this
recovers
its
shape
after
deformation,
positioning
promising
candidate
repair
applications.
