Advanced Healthcare Materials,
Год журнала:
2022,
Номер
11(15)
Опубликована: Июнь 7, 2022
Hydrogel-based
epidermal
electrodes
attract
widespread
attention
in
health
monitoring
and
human-machine
interfaces
for
their
good
biocompatibility,
skin-matched
Young's
modulus,
stable
situ
electrophysiological
recording
performance.
However,
it
is
difficult
to
make
the
exact
conformal
attachment
between
skin
because
of
hair,
wrinkles,
as
well
complex,
curved
contours
skin.
This
also
results
signal
distortion
large
noise.
Here,
a
body
temperature
enhanced
skin-adhesive
electrode
proposed
based
on
non-covalent
cross-linked
network
ionic
hydrogel.
The
hydrogel
fabricated
by
polyvinyl
alcohol,
branched
polyethyleneimine,
calcium
chloride
(CaCl2
),
which
demonstrates
impressive
performances
including
ultra-stretchability
1291%,
great
adhesion
other
non-biological
materials,
conductivity
3.09
S
m-1
,
recyclability,
outstanding
antibacterial
ability,
simultaneously.
Specifically,
behaves
temperature-sensitive
could
be
temperature.
Furthermore,
utilized
electrodes,
display
seductive
capability
record
multifarious
signals
with
high
signal-to-noise
ratio
ultra-low
detection
limit,
electrocardiogram,
electromyogram,
electroencephalogram.
as-proposed
brings
intelligent
functions
broadens
way
electronics,
promoting
development
healthcare
electronics.
ACS Applied Materials & Interfaces,
Год журнала:
2022,
Номер
14(13), С. 15504 - 15516
Опубликована: Март 28, 2022
The
universal
application
of
wearable
strain
sensors
in
various
situations
for
human-activity
monitoring
is
considerably
limited
by
the
contradiction
between
high
sensitivity
and
broad
working
range.
There
still
remains
a
huge
challenge
to
design
featuring
simultaneous
range
sensitivity.
Herein,
typical
bilayer-conductive
structure
Ti3C2Tx
MXene/carbon
nanotubes
(CNTs)/thermoplastic
polyurethane
(TPU)
composite
film
was
developed
simple
scalable
vacuum
filtration
process
utilizing
porous
electrospun
thermoplastic
mat
as
skeleton.
MXene/CNTs/TPU
sensor
composed
two
parts:
brittle
densely
stacked
MXene
upper
lamella
flexible
MXene/CNT-decorated
fibrous
network
lower
layer.
Benefiting
from
synergetic
effect
parts
along
with
hydrogen-bonding
interactions
TPU
fiber
sheets,
possesses
both
(up
330%)
(maximum
gauge
factor
2911)
well
superb
long-term
durability
(2600
cycles
under
50%).
Finally,
can
be
successfully
employed
human
movement
monitoring,
tiny
facial
expressions,
respiration,
pulse
beat
large-scale
finger
elbow
bending,
demonstrating
promising
attractive
devices
human-machine
interaction.
Journal of Materials Chemistry B,
Год журнала:
2022,
Номер
10(31), С. 5873 - 5912
Опубликована: Янв. 1, 2022
Tannic
acid
(TA),
a
natural
polyphenol,
is
hydrolysable
amphiphilic
tannin
derivative
of
gallic
with
several
galloyl
groups
in
its
structure.
interacts
various
organic,
inorganic,
hydrophilic,
and
hydrophobic
materials
such
as
proteins
polysaccharides
via
hydrogen
bonding,
electrostatic,
coordinative
interactions.
has
been
studied
for
biomedical
applications
crosslinker
anti-inflammatory,
antibacterial,
anticancer
activities.
In
this
review,
we
focus
on
TA-based
hydrogels
biomaterials
engineering
to
help
scientists
engineers
better
realize
TA's
potential
the
design
fabrication
novel
hydrogel
biomaterials.
The
interactions
TA
or
synthetic
compounds
are
deliberated,
discussing
parameters
that
affect
TA-material
thus
providing
fundamental
set
criteria
utilizing
tissue
healing
regeneration.
review
also
discusses
merits
demerits
using
developing
either
through
direct
incorporation
formulation
indirectly
immersing
final
product
solution.
general,
bioactive
molecule
diverse
hydrogels.
ACS Applied Materials & Interfaces,
Год журнала:
2022,
Номер
14(23), С. 26536 - 26547
Опубликована: Июнь 3, 2022
Flexible
wearable
devices
have
achieved
remarkable
applications
in
health
monitoring
because
of
the
advantages
multisignal
collecting
and
real-time
wireless
transmission
information.
However,
integration
bulky
sensing
elements
rigid
metal
circuit
components
traditional
may
lead
to
a
mechanical
signal-conducting
mismatch
between
biological
tissues,
thus
restricting
their
wide
human
body.
The
excellent
properties,
conductivity,
high
tissue
resemblance
conductive
hydrogel
contribute
its
application
flexible
electronic
sensors
monitor
health.
In
this
work,
dual-network,
temperature-responsive
ionic
with
stretchability,
fast
temperature
responsiveness,
good
conductivity
was
developed
by
introducing
polyvinylpyrrolidone
(PVP)/
tannic
acid
(TA)/
Fe3+
cross-linked
network
into
N,N-methylene
diacrylamide
(MBAA)
poly(N-isopropylacrylamide-co-acrylamide)
(P(NIPAAm-co-AM))
network.
Furthermore,
introduction
PVP/TA/Fe3+
endowed
stretchability
conductivity.
By
adjusting
molar
ratio
TA
3:5,
maximal
stretching
720%
sensitive
strain
response
(GF
=
3.61)
achieved,
showing
promising
both
large
fine
motions.
Moreover,
PNIPAAm
lower
critical
solution
(LCST),
be
used
environmental
through
temperature–conductivity
which
can
applied
as
sensor
detect
fever
or
hyperthermia
Nano-Micro Letters,
Год журнала:
2023,
Номер
15(1)
Опубликована: Апрель 13, 2023
Abstract
Multifunctional
supramolecular
ultra-tough
bionic
e-skin
with
unique
durability
for
human–machine
interaction
in
complex
scenarios
still
remains
challenging.
Herein,
we
develop
a
skin-inspired
tunable
mechanical
properties
by
physical
cross-linking
salting-freezing-thawing
method.
The
gelling
agent
(
β
-Glycerophosphate
sodium:
Gp)
induces
the
aggregation
and
binding
of
PVA
molecular
chains
thereby
toughens
them
(stress
up
to
5.79
MPa,
toughness
13.96
MJ
m
−3
).
Notably,
due
self-assembly,
hydrogels
can
be
fully
recycled
reprocessed
direct
heating
(100
°C
few
seconds),
tensile
strength
maintained
at
about
100%
after
six
recoveries.
hydrogel
integrates
transparency
(>
60%),
super
(up
,
bearing
1500
times
its
own
weight),
good
antibacterial
E.
coli
S.
aureus
),
UV
protection
(Filtration:
80%–90%),
high
electrical
conductivity
(4.72
S
−1
anti-swelling
recyclability.
not
only
monitor
daily
physiological
activities,
but
also
used
activities
underwater
message
encryption/decryption.
We
it
create
complete
finger
joint
rehabilitation
system
an
interactive
interface
that
dynamically
presents
user’s
health
status.
Our
multifunctional
electronic
skin
will
have
profound
impact
on
future
new
medical,
interaction,
VR/AR
metaverse
fields.
ACS Applied Materials & Interfaces,
Год журнала:
2021,
Номер
13(47), С. 56607 - 56619
Опубликована: Ноя. 17, 2021
Wearable
electronics
have
enriched
daily
lives
by
providing
smart
functions
as
well
monitoring
body
health
conditions.
However,
the
realization
of
wearable
with
personal
healthcare
and
thermal
comfort
management
human
is
still
a
great
challenge.
Furthermore,
manufacturing
such
on-skin
on
traditional
thin-film
substrates
results
in
limited
gas
permeability
inflammation.
Herein,
we
proposed
textile
three-dimensional
(3D)
interconnected
conductive
network,
formed
silver
nanowires
(AgNWs)
bridging
lamellar
structured
transition-metal
carbide/carbonitride
(MXene)
nanosheets
deposited
nonwoven
fabrics.
Benefiting
from
network
synergistic
effect
one-dimensional
(1D)
AgNWs
two-dimensional
(2D)
MXene,
strain
sensor
exhibits
excellent
durability
(>1500
stretching
cycles)
high
sensitivity
(gauge
factor
(GF)
=
1085)
wide
range
limit
(∼100%),
details
activities
can
be
accurately
recognized
monitored.
Moreover,
thanks
to
Joule
heating
photothermal
endowed
multifunctional
direct
temperature
visualization
solar-powered
regulation
was
successfully
developed,
after
further
combination
thermochromic
phase-change
functional
layers,
respectively.
The
textiles
stretchable
AgNW-MXene
3D
hold
promise
for
next-generation
systems.
Polyacrylic
acid
(PAA)
and
its
derivatives
are
commonly
used
as
essential
matrices
in
wound
dressings,
but
their
weak
wet
adhesion
restricts
the
clinical
application.
To
address
this
issue,
a
PAA-based
coacervate
hydrogel
with
strong
capability
is
fabricated
through
facile
mixture
of
PAA
copolymers
isoprenyl
oxy
poly(ethylene
glycol)
ether
tannic
(TA).
The
segments
on
prevent
electrostatic
repulsion
among
ionized
carboxyl
groups
absorbed
TA
to
form
coacervates.
provides
solid
dry
substrates
via
multifarious
interactions,
which
endows
an
adhesive
strength
skin
23.4
kPa
70%
underwater.
This
achieves
desirable
self-healing
extensible
properties
suitable
for
frequently
moving
joints.
These
investigations
prove
that
has
antibacterial
activity,
facilitates
fibroblast
migration,
modulates
M1/M2
polarization
macrophages.
In
vivo
hemorrhage
experiments
further
confirm
dramatically
shortens
hemostatic
time
from
hundreds
tens
seconds.
addition,
full-thickness
defect
demonstrate
best
therapeutic
effect
by
significantly
promoting
collagen
deposition,
angiogenesis,
epithelialization.
results
promising
dressing
medical
translation.
