Designing Strong yet Tough, Multifunctional and Printable Dynamic Cross‐Linking Waterborne Polyurethane for Customizable Smart Soft Devices
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 7, 2025
Abstract
Dynamic
cross‐linking
waterborne
polyurethanes
(DCWPU)
are
gaining
increasing
attention
for
their
great
potential
in
soft
materials,
flexible
sensors,
robotics,
and
bioelectronic
devices.
However,
achieving
a
facile
straightforward
design
of
strong
yet
tough,
multifunctional,
printable
DCWPU
customizable
smart
devices
is
still
challenging
this
field.
Here,
simple
versatile
visible‐light‐mediate
situ
metal‐ligand
coordination
(VSMC)
strategy
reported
to
fabricate
high‐performance
DCWPU.
This
photochemical
enables
the
rapid
controllable
release
metal
ions
from
ethylenediaminetetraacetic
acid
salts,
orthogonally
triggering
classical
radical
polymerization.
The
resulting
homogeneous
metal‐coordinated
network
significantly
enhances
stretching
strain,
stress,
toughness
reversibility
further
imparts
excellent
shape
memory,
shape‐reconfigurable
self‐healing
features
when
exposed
heat
stimuli.
Moreover,
efficient
VSMC
greatly
reduces
gelation
time
under
5
s,
which
improves
its
printability
structural
design.
Leveraging
these
advanced
performances,
application
demonstrated.
work
expected
open
new
avenues
Language: Английский
Super-elastic and Multifunctional Graphene Aerogels with Multilayer Cross-linked Pore Structure for Dynamic Force Sensing Arrays
Carbon,
Journal Year:
2025,
Volume and Issue:
unknown, P. 120105 - 120105
Published: Feb. 1, 2025
Language: Английский
Dynamic Bonding for In‐Situ Welding of Multilayer Elastomers Enables High‐Performance Wearable Electronics for Machine Learning‐Assisted Active Rehabilitation
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 12, 2025
Abstract
Patients
with
hand
dysfunction
require
joint
rehabilitation
for
functional
restoration,
and
wearable
electronics
can
provide
physical
signals
to
assess
guide
the
process.
However,
most
are
susceptible
failure
under
large
deformations
owing
instability
in
layered
structure,
thereby
weakening
signal
reliability.
Herein,
an
in‐situ
self‐welding
strategy
that
uses
dynamic
hydrogen
bonds
at
interfaces
integrate
conductive
elastomer
layers
into
highly
robust
is
proposed.
This
enables
interlocking
of
different
microstructures,
achieving
high
interfacial
toughness
(e.g.,
≈700
J
m
−2
micropyramid
layer
smallest
welding
areas)
preventing
structural
failure.
The
welded
exhibit
excellent
pressure‐sensing
performance,
including
sensitivity,
a
wide
sensing
range,
long‐term
stability,
surpassing
those
unwelded
electronics.
reliable
collection
comprehensive
pressure
during
rehabilitation,
which
beneficial
assessing
levels
patient.
Furthermore,
machine
learning‐assisted
system
using
t
‐distributed
stochastic
neighbor
embedding
artificial
neural
network
models
facilitate
home‐based
active
established,
reduces
need
frequent
hospital
visits.
analyzes
quantifies
timely
manner,
allowing
patients
adjust
training
programs
autonomously,
accelerating
Language: Английский
A Vitrimer‐Like Elastomer with Quadruple Hydrogen Bonding as a Fully Recyclable Substrate for Sustainable Flexible Wearables
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 22, 2025
Abstract
Wearable
flexible
electronics
(WFE)
have
great
potential
in
health
management
and
personalized
medicine;
however,
their
rapid
development
has
led
to
a
sharp
increase
electronic
waste,
leading
environmental
risks.
Although
previous
studies
proposed
the
use
of
degradable
polymers,
such
WFE
is
disposable.
Therefore,
design
recyclable
promising,
but
relevant
works
been
limited.
Herein,
vitrimer‐like
polyurethane
elastomer
containing
dynamic
ureidopyrimidinone
quadruple
hydrogen
bonding
units
(PU‐UPy)
developed
as
substrate
for
sustainable
WFE.
The
PU‐UPy
tough
with
tensile
strength
24.4
MPa,
maximum
strain
2950%,
toughness
228
MJ
m
−
3
,
satisfying
mechanical
requirements
Moreover,
thermally‐induced
nature
bonds
donated
by
UPy
makes
via
both
solid
solvent
reprocessing.
By
creating
microstructures
shape
reconfiguration,
electrode
layers
are
assembled
into
pressure‐sensing
WFE,
enabling
motion
monitoring
Morse
code
recognition.
Furthermore,
can
be
fully
recycled
facile
reprocessing;
recycling
reassembly
could
repeatable,
still
maintains
good
performance.
Overall,
this
work
provides
inspiration
from
polymers.
Language: Английский