Biomacromolecules,
Год журнала:
2024,
Номер
25(2), С. 614 - 625
Опубликована: Янв. 19, 2024
Conductive
hydrogels
integrate
the
conductive
performance
and
soft
nature,
which
is
like
that
of
human
skin.
Thus,
they
are
more
suitable
for
preparation
wearable
human-motion
sensors.
Nevertheless,
integration
outstanding
multiple
functionalities,
such
as
stretchability,
toughness,
biocompatibility,
self-healing,
adhesion,
strain
sensitivity,
durability,
by
a
simple
way
still
huge
challenge.
Herein,
we
have
developed
multifunctional
chitosan/oxidized
hyaluronic
acid/hydroxypropyl
methylcellulose/poly(acrylic
acid)/tannic
acid/Al3+
hydrogel
(CS/OHA/HPMC/PAA/TA/Al3+)
using
two-step
method
with
hydroxypropyl
methylcellulose
(HPMC),
acrylic
acid
(AA),
tannic
(TA),
chitosan
(CS),
oxidized
(OHA),
aluminum
chloride
hexahydrate
(AlCl3·6H2O).
Due
to
synergistic
effect
dynamic
imine
bonds
between
CS
OHA,
metal
coordination
Al3+
−COOH
and/or
TA
well
reversible
hydrogen,
showed
excellent
tensile
property
(elongation
at
break
3168%)
desirable
toughness
(0.79
MJ/m3).
The
mechanical
self-healing
efficiency
can
reach
95.5%
30
min,
conductivity
recover
in
5.2
s
room
temperature
without
stimulation.
favorable
attribute
high
transparency
(98.5%
transmittance)
facilitates
transmission
optical
signal
enables
visualization
sensor.
It
also
shows
good
adhesiveness
various
materials
easy
peel
off
residue.
resistance
hydrogel-based
sensors
electrical
(2.33
S
m–1),
sensing
sensitivity
(GF
value
4.12
under
1600%
strain),
low
detection
limit
(less
than
1%),
short
response/recovery
time
(0.54/0.31
s).
adhered
skin
monitored
movements
bending
joints,
swallowing,
speaking
successfully.
Therefore,
obtained
has
great
potential
applications
ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(4), С. 5128 - 5138
Опубликована: Янв. 19, 2023
The
rapid
development
of
wearable
electronic
devices
and
virtual
reality
technology
has
revived
interest
in
flexible
sensing
control
devices.
Here,
we
report
an
ionic
hydrogel
(PTSM)
prepared
from
polypropylene
amine
(PAM),
tannic
acid
(TA),
sodium
alginate
(SA),
MXene.
Based
on
the
multiple
weak
H-bonds,
this
exhibits
excellent
stretchability
(strain
>4600%),
adhesion,
self-healing.
introduction
MXene
nanosheets
endows
sensor
with
a
high
gauge
factor
(GF)
6.6.
Meanwhile,
it
also
enables
triboelectric
nanogenerators
(PTSM-TENGs)
fabricated
silicone
rubber-encapsulated
hydrogels
to
have
energy
harvesting
efficiency,
instantaneous
output
power
density
54.24
mW/m2.
We
build
glove-based
human-computer
interaction
(HMI)
system
using
PTSM-TENGs.
multidimensional
signal
features
PTSM-TENG
are
extracted
analyzed
by
HMI
system,
functions
gesture
visualization
robot
hand
realized.
In
addition,
signals
can
be
used
for
object
recognition
help
machine
learning
techniques.
glove
based
achieves
classification
five
objects
through
contact,
accuracy
rate
98.7%.
Therefore,
strain
sensors
broad
application
prospects
man-machine
interface,
intelligent
systems,
auxiliary
other
fields
due
their
stretchable
self-healing
performance.
Nano-Micro Letters,
Год журнала:
2023,
Номер
15(1)
Опубликована: Апрель 15, 2023
Growing
health
awareness
triggers
the
public's
concern
about
problems.
People
want
a
timely
and
comprehensive
picture
of
their
condition
without
frequent
trips
to
hospital
for
costly
cumbersome
general
check-ups.
The
wearable
technique
provides
continuous
measurement
method
monitoring
by
tracking
person's
physiological
data
analyzing
it
locally
or
remotely.
During
process,
different
kinds
sensors
convert
signals
into
electrical
optical
that
can
be
recorded
transmitted,
consequently
playing
crucial
role
in
techniques.
Wearable
application
scenarios
usually
require
possess
excellent
flexibility
stretchability.
Thus,
designing
flexible
stretchable
with
reliable
performance
is
key
technology.
Smart
composite
hydrogels,
which
have
tunable
properties,
mechanical
biocompatibility,
multi-stimulus
sensitivity,
are
one
best
sensitive
materials
monitoring.
This
review
summarizes
common
synthetic
optimization
strategies
smart
hydrogels
focuses
on
current
field
Advanced Materials,
Год журнала:
2023,
Номер
35(21)
Опубликована: Фев. 27, 2023
Abstract
It
is
essential
and
of
great
significance
to
impart
high
mechanical
performance,
environmental
stability,
sensitivity
emerging
flexible
temperature
sensors.
In
this
work,
polymerizable
deep
eutectic
solvents
are
designed
prepared
by
simply
mixing
N‐cyanomethyl
acrylamide
(NCMA)
containing
an
amide
group
a
cyano
in
the
same
side
chain
with
lithium
bis(trifluoromethane)
sulfonimide
(LiTFSI),
obtain
supramolecular
polyNCMA/LiTFSI
gels
after
polymerization.
These
exhibit
excellent
performance
(tensile
strength
12.9
MPa
fracture
energy
45.3
kJ
m
−2
),
strong
adhesion
force,
high‐temperature
responsiveness,
self‐healing
ability,
shape
memory
behavior
due
reversible
reconstruction
ability
hydrogen
bonds
cyano‐cyano
dipole‐dipole
interactions
gel
network.
addition,
also
demonstrate
good
stability
3D
printability.
To
verify
its
application
potential
as
sensor,
gel‐based
wireless
monitor
developed
displays
outstanding
thermal
(8.4%/K)
over
wide
detection
range.
The
preliminary
result
suggests
promising
PNCMA
pressure
sensor.
Advanced Energy Materials,
Год журнала:
2023,
Номер
13(9)
Опубликована: Янв. 20, 2023
Abstract
As
an
extended
member
of
the
thermoelectric
family,
ionic
thermoelectrics
(i‐TEs)
exhibit
exceptional
Seebeck
coefficients
and
applicable
power
factors,
as
a
result
have
triggered
intensive
interest
promising
energy
conversion
technique
to
harvest
exploit
low‐grade
waste
heat
(<130
°C).
The
last
decade
has
witnessed
great
progress
in
i‐TE
materials
devices;
however,
there
are
ongoing
disputes
about
inherent
fundamentals
working
mechanisms
i‐TEs,
comprehensive
overview
this
field
is
required
urgently.
In
review,
prominent
effects,
which
set
ground
for
materials,
or
more
precisely,
thermo‐electrochemical
systems,
first
elaborated.
Then,
TE
performance,
capacitance
capability,
mechanical
properties
such
system‐based
followed
by
critical
discussion
on
how
manipulate
these
factors
toward
higher
figure‐of‐merit,
examined.
After
that,
prevalent
molding
methods
assembling
into
devices
summarized.
To
conclude,
several
evaluation
criteria
proposed
quantitatively
illustrate
promise
practical
applications.
It
therefore
clarified
if
recent
trend
developing
i‐TEs
can
continue,
recycling
landscape
will
be
significantly
altered.
Materials & Design,
Год журнала:
2023,
Номер
229, С. 111917 - 111917
Опубликована: Апрель 7, 2023
Timely
and
accurate
assessment
of
wounds
during
the
wound
healing
process
is
key
for
correct
diagnosis
treatment
decisions
repair.
However,
traditional
management
strategies
often
fail
to
provide
timely
information
on
status,
thereby
delaying
or
misleading
treatments.
Smart
dressings
that
enable
in
situ
real-time
monitoring
wound-related
biomarkers,
early
on-demand
adverse
events,
such
as
bacterial
infection
inflammation,
by
integrating
wearable
sensors,
advanced
drug
delivery
systems
wireless
communication
technology
have
recently
been
developed
could
improve
management.
In
this
review,
we
provided
an
overview
including
temperature,
pH,
uric
acid,
glucose,
reactive
oxygen
(ROS),
enzymes,
related
events
exiting
sensors
detecting
these
biomarkers
based
colorimetric,
fluorimetric
electrochemical
approaches.
Examples
smart
integrate
controllable
functions
triggered
both
endogenous
exogenous
stimuli,
all-in-one
dressing
capable
treatment,
major
challenges
exciting
opportunities
are
presented
comprehensively
discussed.
Journal of Materials Chemistry B,
Год журнала:
2024,
Номер
12(28), С. 6940 - 6958
Опубликована: Янв. 1, 2024
Conductive
hydrogels
(CHs)
with
high
sensitivity
and
multifunctional
property
are
considered
as
excellent
materials
for
wearable
devices
flexible
electronics.
Surface
synapses
internal
multilayered
structures
key
factors
highly
sensitive
pressure
sensors.
Nevertheless,
current
CHs
lack
environmental
adaptability,
perception,
instrument
portability,
which
seriously
hinders
their
application
Here,
waste
collagen
fibers
(buffing
dust
of
leather),
polyvinyl
alcohol
(PVA)
gelatin
(Gel)
were
used
the
basic
framework
hydrogel,
loaded
a
conductive
material
(silver
nanoparticles
(BD-CQDs@AgNPs))
an
anti-freezing
moisturizer
(glycerol
(Gly)),
resulting
in
organohydrogel
(BPGC-Gly).
As
temperature
humidity
sensor,
it
demonstrated
response
range
(-20-60
°C)
was
capable
rapid
(2.4
s)
recovery
(1.6
to
human
breathing.
strain/pressure
allowed
real-time
monitoring
movement
had
low-pressure
(
Advanced Healthcare Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 10, 2024
Conductive
hydrogel
has
garnered
significant
attention
as
an
emergent
candidate
for
diverse
wearable
sensors,
owing
to
its
remarkable
and
tailorable
properties
such
flexibility,
biocompatibility,
strong
electrical
conductivity.
These
attributes
make
it
highly
suitable
various
sensor
applications
(e.g.,
biophysical,
bioelectrical,
biochemical
sensors)
that
can
monitor
human
health
conditions
provide
timely
interventions.
Among
these
applications,
conductive
hydrogel-based
temperature
sensors
are
especially
important
healthcare
disease
surveillance.
This
review
aims
a
comprehensive
overview
of
sensors.
First,
this
work
summarizes
different
types
fillers-based
hydrogel,
highlighting
their
recent
developments
advantages
Next,
discusses
the
sensing
characteristics
focusing
on
sensitivity,
dynamic
stability,
stretchability,
signal
output.
Then,
state-of-the-art
introduced,
ranging
from
body
detection
wound
monitoring.
Finally,
identifies
remaining
challenges
prospects
facing
field.
By
addressing
with
potential
solutions,
hopes
shed
some
light
future
research
innovations
in
promising
