Abstract
In
the
wave
of
Internet
era
created
by
computer
and
communication
technology,
flexible
sensors
play
an
important
role
in
accurately
collecting
information
owing
to
their
excellent
flexibility,
ductility,
freeform
bending
or
folding,
versatile
structural
shapes.
By
endowing
elastomeric
polymers
with
conductivity,
researchers
have
recently
devoted
extensive
efforts
toward
developing
high‐performance
based
on
conductive
layers
exploring
potential
applications
diverse
fields
ranging
from
project
manufacturing
daily
life.
This
review
reports
recent
advancements
used
make
layers,
as
well
relationships
between
performance
application
are
comprehensively
summarized.
First,
principles
methods
for
using
construct
provided.
Then,
fundamental
design,
unique
properties,
underlying
mechanisms
different
(pressure/strain,
temperature,
humidity)
related
revealed.
Finally,
this
concludes
a
perspective
challenges
future
directions
sensors.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(24)
Опубликована: Март 10, 2023
Abstract
Sophisticated
sensing
and
actuation
capabilities
of
many
living
organisms
in
nature
have
inspired
scientists
to
develop
biomimetic
somatosensory
soft
robots.
Herein,
the
design
fabrication
homogeneous
highly
conductive
hydrogels
for
bioinspired
actuators
are
reported.
The
synthesized
by
situ
copolymerization
surface‐functionalized
MXene/Poly(3,4‐ethylenedioxythiophene)/poly(styrenesulfonate)
ink
with
thermoresponsive
poly(
N
‐isopropylacrylamide)
hydrogels.
resulting
found
exhibit
high
conductivity
(11.76
S
m
−1
),
strain
sensitivity
(GF
9.93),
broad
working
range
(≈560%
strain),
stability
after
over
300
loading–unloading
cycles
at
100%
strain.
Importantly,
shape‐programmable
hydrogel
rapid
response,
light‐driven
remote
control,
self‐sensing
capability
developed
chemically
integrating
a
structurally
colored
polymer.
As
proof‐of‐concept
illustration,
applied
devising
programmable
shape‐morphing
an
artificial
octopus,
fish,
gripper
that
can
simultaneously
monitor
their
own
motions
via
real‐time
resistance
variation.
This
work
is
expected
offer
new
insights
into
advanced
materials
capabilities,
pave
avenue
development
soft‐matter‐based
self‐regulatory
intelligence
built‐in
feedback
control
paramount
significance
intelligent
robotics
automated
machines.
It
is
challenging
for
traditional
wound
dressings
to
adapt
the
complex
and
changeable
environment,
due
lack
of
stable,
efficient,
continuous
bactericidal
activity.
They
also
cannot
be
satisfied
in
a
multifunctional
sensing
platform
reconstruct
skin
sensory
functions
human
health
monitoring.
A
hydrogel
dressing
developed
here
treatment
infected
wounds
monitoring,
which
based
on
alginate
polycation.
The
situ
polymerization
solvent
displacement
method
are
used
functionalize
improvement
antifreezing,
water
retention,
environmental
adaptability,
as
well
adhesion
photothermal
property.
As
dressing,
as-prepared
exhibits
an
excellent
antibacterial
property
against
both
Escherichia
coli
Staphylococcus
aureus.
In
rat
model
full-thickness
infection,
it
significantly
accelerates
healing
with
high
rate
96.49%.
further
tests,
shows
multiple
response
modes
strain,
pressure
temperature,
stability.
An
idea
provided
develop
smart
that
can
accelerate
achieve
ACS Applied Materials & Interfaces,
Год журнала:
2022,
Номер
14(38), С. 43010 - 43025
Опубликована: Сен. 15, 2022
Preventing
bacterial
infections
and
accelerating
wound
closure
are
essential
in
the
process
of
healing.
Current
dressings
lack
enough
mechanical
properties,
self-healing
ability,
tissue
adhesiveness,
killing
also
relies
on
use
antibiotic
drugs.
Herein,
a
well-designed
hybrid
hydrogel
dressing
is
constructed
by
simple
copolymerization
acrylamide
(AM),
3-acrylamido
phenylboronic
acid
(AAPBA),
chitosan
(CS),
nanoscale
tannic
(TA)/ferric
ion
(Fe3+)
complex
(TFe).
The
resulting
possesses
lots
free
catechol,
acid,
amine,
hydroxyl
groups
contains
many
reversible
dynamic
bonds
such
as
multiple
hydrogen
boronate
ester
bonds,
thereby
showing
satisfactory
fast
desirable
tissue-adhesive
performance.
Benefiting
from
high
photothermal
conversion
efficiency
TFe,
exhibits
antibacterial
activity
against
both
Gram-positive
Gram-negative
bacteria.
Moreover,
embedded
TFe
endows
with
good
antioxidant
activity,
anti-inflammatory
property,
cell
proliferation
to
promote
regeneration.
Remarkably,
vivo
animal
assays
reveal
that
effectively
eliminates
biofilm
bacteria
sites
accelerates
healing
infected
wounds.
Taken
together,
developed
versatile
hydrogels
overcome
shortcomings
traditional
expected
become
potential
for
future
biomedical
applications.
Chemistry of Materials,
Год журнала:
2023,
Номер
35(14), С. 5582 - 5592
Опубликована: Июль 7, 2023
Wearable
sensors
made
of
flexible
and
stretchable
hydrogels
have
garnered
significant
attention.
However,
their
use
has
been
limited
by
poor
mechanical
performance,
such
as
toughness,
self-recovery,
a
large
response–recovery
time.
To
overcome
these
limitations,
we
developed
novel
cross-linking
agent-based
hydrogel
with
high
stretchability,
antifatigue
properties,
good
conductivity.
These
were
introducing
l-glutamic
acid
(LGA)
into
hydrophobically
cross-linked
polyacrylamide
(PAmm)
chains.
In
this
system,
LGA
dynamically
the
micelle–micelle
micelle–polymer
chains
greatly
regulates
properties
hydrogels.
The
noncovalent
synergistic
interactions
that
came
insertion
enable
to
achieve
stretchability
stress
values,
fast
self-recovery
behaviors
without
help
foreign
stimuli.
Additionally,
LGA-based
can
function
durable
highly
sensitive
strain
for
detecting
various
deformations
time
gauge
factor
value.
As
result,
capability
be
designed
wearable
are
capable
human
joint
motions,
neck
twisting,
bending,
wrist,
finger,
elbow
movements.
Similarly,
monitoring
different
subtle
motions
speaking
differentiating
between
words,
swallowing,
drinking
through
larynx
vibrations.
Besides
ability
differentiate
reproduce
written
words
reliability.
LGA-regulated
potential
applications
in
electric
skins,
medical
monitoring,
soft
robotics,
touch
panels.
Abstract
Infected
burn
wounds
are
characterized
by
persistent
drug‐resistant
bacterial
infection
coupled
with
an
inflammatory
response,
impeding
the
wound‐healing
process.
In
this
study,
intelligent
nanoparticle
system
(CCM+TTD@ZIF‐8
NPs)
was
prepared
using
curcumin
(CCM),
aggregation‐induced
emission
luminogens
(TTD),
and
ZIF‐8
for
infection‐induced
wound
healing.
The
CCM+TTD@ZIF‐8
NPs
showed
multiple
functions,
including
bacteria
targeting,
fluorescence
imaging
pH
response‐guided
photodynamic
therapy
(PDT),
anti‐inflammatory.
positive
charges
of
allowed
targeting
in
infected
wounds,
thereby
realizing
emitting
red
at
site
upon
blue
light
irradiation.
pH‐responsive
characteristics
also
enabled
controllable
CCM
release
onto
site,
promoting
specific
accumulation
ROS
outstanding
bactericidal
efficacy
against
Staphylococcus
aureus
(S.
aureus)
Pseudomonas
aeruginosa
(P.
aeruginosa)
strains
vitro/in
vivo.
Additionally,
due
to
excellent
effect
anti‐inflammatory
properties
combined
irradiation,
regeneration
epidermal
tissue,
angiogenesis,
collagen
deposition
achieved,
accelerating
healing
process
wounds.
Therefore,
multifunctional
provides
great
potential
