ACS Applied Materials & Interfaces,
Journal Year:
2021,
Volume and Issue:
13(30), P. 36574 - 36586
Published: July 24, 2021
The
design
of
hydrogels
with
switchable
adhesion
and
stable
antiswelling
property
in
a
wet
environment
has
remained
challenge.
Here,
we
report
biomimetic
hydrogel
that
can
adhere
detach
on-demand
on
various
material
surfaces,
which
is
realized
by
thermal-triggered
shape
transformation
hexagonal
micropillar
patterned
hydrogels.
are
cross-linked
two
cross-linkers
poly(ethylene
glycol)
dimethacrylate
2-ureidoethyl
methacrylate,
guarantee
the
strong
mechanical
environment.
maintain
water
content
solutions
variable
pH,
temperature,
salt
concentration,
change
volume
does
not
exceed
2%.
In
addition,
due
to
dynamical
hydrogen
bonds
dipole–dipole
interaction
hydrogels,
exhibit
shape-memory
effect.
recover
more
than
80%
15
s.
Furthermore,
inspired
surface
structure
tree-frog
footpads,
improved
underwater
strength.
strength
seven
times
flat
Based
effect
be
altered
thermal
stimulus.
microstructures
recovered
from
decreased
15.4%
initial
applied
fields
transfer
printing,
medical
adhesives,
mobile
robots,
etc.
Journal of Materials Chemistry B,
Journal Year:
2021,
Volume and Issue:
9(11), P. 2561 - 2583
Published: Jan. 1, 2021
Recently,
hydrogel-based
conductive
materials
and
their
applications
as
smart
wearable
devices
have
been
paid
tremendous
attention
due
to
high
stretchability,
flexibility,
excellent
biocompatibility.
Compared
with
single
functional
hydrogels,
multifunctional
hydrogels
are
more
advantageous
match
various
demands
for
practical
applications.
This
review
focuses
on
applied
devices.
Representative
strategies
conduction
of
discussed
firstly:
(1)
electronic
based
the
fillers
(2)
ionic
charged
ions.
Then,
common
intensive
research
multiple
functionalities
such
mechanical
properties,
sensory
anti-freezing
moisturizing
adhesion
self-healing
properties
is
presented.
The
in
human
motion
sensors,
skins,
personal
healthcare
diagnosis
provided
third
part.
Finally,
we
offer
our
perspective
open
challenges
future
areas
interest
used
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(39)
Published: July 14, 2022
Abstract
Inspired
by
shape‐morphing
organisms
in
nature,
researchers
have
developed
various
hydrogels
with
stimuli‐responsive
swelling,
shrinking,
bending,
folding,
origami,
rolling,
twisting,
or
locomotion.
These
smart
are
usually
created
patterning
4D
printing.
The
shape
morphing
of
allows
the
fabrication
helixing,
and
rolling
microstructures,
all
which
hard
to
reproduce
directly
ordinary
techniques.
More
importantly,
under
external
stimuli
(e.g.,
solvent,
humidity,
temperature,
light,
pH,
electric/magnetic
fields),
many
exhibit
recoverable
thus
find
promising
applications
grippers,
sensors,
valves,
soft
robotics,
etc.
Since
determines
functions
a
great
number
cases,
herein,
recent
advances
summarized,
their
types,
mechanisms,
methods,
modes,
extensive
covered.
conclusion
perspectives
also
presented
guide
design
functional
hydrogels.
Journal of Polymer Science,
Journal Year:
2021,
Volume and Issue:
59(13), P. 1312 - 1337
Published: May 25, 2021
Abstract
Adhesive
hydrogels
have
broad
applications
in
tissue
adhesives,
hemostatic
agents,
and
biomedical
sensors.
Various
bio‐inspired
glues
synthetic
adhesives
are
clinically
used
as
conventional
agents
auxiliary
tools
for
wound
closure.
Medical
needed
to
effectively
quickly
control
bleeding,
thereby
reducing
the
risk
of
complications
caused
by
severe
blood
loss.
sensors
need
excellent
skin
compliance,
mechanical
properties,
sensitivity,
biological
safety.
This
review
focuses
on
recent
progress
adhesive
hydrogel
systems,
their
structures,
adhesion
mechanisms,
construction
strategies,
emerging
field.
Advanced Healthcare Materials,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: Sept. 13, 2023
Abstract
The
healing
of
diabetic
wounds
is
hindered
by
various
factors,
including
bacterial
infection,
macrophage
dysfunction,
excess
proinflammatory
cytokines,
high
levels
reactive
oxygen
species,
and
sustained
hypoxia.
These
factors
collectively
impede
cellular
behaviors
the
process.
Consequently,
this
review
presents
intelligent
hydrogels
equipped
with
multifunctional
capacities,
which
enable
them
to
dynamically
respond
microenvironment
accelerate
wound
in
ways,
stimuli
‐responsiveness,
injectable
self‐healing,
shape
‐memory,
conductive
real‐time
monitoring
properties.
relationship
between
multiple
functions
also
discussed.
Based
on
wounds,
antibacterial,
anti‐inflammatory,
immunomodulatory,
antioxidant,
pro‐angiogenic
strategies
are
combined
hydrogels.
application
repair
systematically
discussed,
aiming
provide
guidelines
for
fabricating
exploring
role
therapeutic
processes.
npj Flexible Electronics,
Journal Year:
2022,
Volume and Issue:
6(1)
Published: Aug. 5, 2022
Abstract
Flexible
electronics
are
playing
an
increasingly
important
role
in
human
health
monitoring
and
healthcare
diagnosis.
Strong
adhesion
on
tissue
would
be
ideal
for
reducing
interface
resistance
motion
artifacts,
but
arising
problems
such
as
skin
irritation,
rubefaction,
pain
upon
device
removal
have
hampered
their
utility.
Here,
inspired
by
the
temperature
reversibility
of
hydrogen
bonding,
a
skin-friendly
conductive
hydrogel
with
multiple-hydrogen
bonds
was
designed
using
biocompatible
poly(vinyl
alcohol)
(PVA),
phytic
acid
(PA),
gelatin
(Gel).
The
obtained
PVA/PA/Gel
(PPG)
temperature-triggered
tunable
mechanic
could
reliably
adhere
to
detect
electrophysiological
signals
under
hot
compress
while
readily
removed
cool
compress.
Furthermore,
additional
advantages
transparency,
breathability,
antimicrobial
activity
PPG
ensure
its
long-time
wearable
value
skin.
It
is
both
environmentally
friendly
cost
saving
waste
during
production
can
recycled
based
reversible
physical
bonding.
sensor
expected
good
application
prospects
record
monitoring.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(33)
Published: June 1, 2022
Abstract
The
growing
interest
in
mimicry
of
biological
skins
greatly
promotes
the
birth
high‐performance
artificial
skins.
Chameleon
can
actively
transform
environmental
information
into
bioelectrical
and
color‐change
signals
simultaneously
through
manipulating
ion
transduction
photonic
nanostructures.
Here,
inspired
by
chameleon
skins,
a
novel
biomimetic
chromotropic
photonic‐ionic
skin
(PI‐skin)
capable
outputting
synergistic
electrical
optical
under
strain
with
robust
adhesion,
stability,
resilience
is
ingeniously
constructed.
PI‐skin
exhibits
sensitive
structural
color
change
synchronized
response
via
adjusting
lattice
spacing
crystal
(mechanochromic
sensitivity:
1.89
nm
per
%,
Δ
λ
>
150
nm).
Notably,
polyzwitterionic
network
provides
abundant
electrostatic
interactions,
endowing
excellent
tolerance,
outstanding
mechanical
stability
(
10
000
continuous
cycles).
Meanwhile,
high
loading
ionic
liquid
(IL)
weakens
interaction
between
molecular
chains,
leading
to
resilience.
finally
applied
construct
visually
interactive
wearable
device,
realizing
precise
human
motion
monitoring,
remote
communication,
visual
localization
pressure
distribution.
This
work
not
only
expands
design
ideas
for
construction
advanced
I‐skins
but
also
general
platform
high‐level
devices
smart
electronics.
