Chain
architecture
and
chemical
composition
of
polymers
can
play
vital
roles
in
regulating
thermoresponsive
properties.
Despite
tremendous
progress,
it
remains
difficult
to
achieve
LCST/upper
critical
solution
temperature
(LCST/UCST)
behavior
with
tunable
thermal
hysteresis
outstripping.
This
study
affords
a
promising
strategy
an
integrated
multiamide
specific
substituents
address
the
challenge.
The
incorporation
two
involving
isopropyl,
2-diethylaminoethyl,
or
carbamoylmethyl
into
each
Y
junction
multiamide-functionalized
Y-junction-bearing
(MAYJPs)
allows
enhancing
polymer–polymer
interactions.
disruption
intrinsic
balances
among
hydrogen
bonding,
electrostatic
interactions,
hydrophilic-to-hydrophobic
ratio
renders
multitunable
phase
transition.
location
switching
heterosubstituents
result
either
inverse
transition
significantly
different
temperature.
thermodynamic
dynamic
control
over
hydration
status
subunits
leads
occurrence
four
kinds
reversibility
slight
significant
hysteresis,
consecutive
outstripping
pronounced
upon
heating–cooling
cycles.
solvent
isotope
effect
results
distinct
type
transition,
pH
is
reflected
pH-induced
increase,
decrease,
V-shaped
evolution
In
addition,
accompany
morphology
transformation
spheres,
vesicles,
nanotubes,
lamellae.
These
fundamental
findings
are
beneficial
for
gaining
insights
multiamide-related
reversibility.
Owing
diversity
substituents,
MAYJPs
may
serve
as
multipurpose
applications.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 3, 2024
Abstract
Organogel
materials
are
vital
for
impact
or
shock
resistance
because
of
their
highly
tailored
dynamic
properties.
However,
concurrently
achieving
excellent
anti‐impact
and
damping
performances,
high
stability,
self‐healing
properties
is
challenging.
Herein,
a
novel
intelligent
protective
organogel
(IPO)
comprising
boronic
ester
containing
poly(urethane–urea)
as
the
network
skeleton
with
matching
mesh
size
synthesized,
precisely
entraps
hyperbranched
fluid
used
bulky
solvent
via
steric
hindrance.
The
IPO
exhibits
ability,
responsiveness
(a
1950‐fold
increase
in
flow
stress
under
various
speeds),
energy
dissipation
(the
loss
factor
>0.8
from
10
−4
to
4
Hz).
maintains
its
mechanical
during
hot
pressing
hydrolysis,
exhibiting
stability.
Furthermore,
omnibearing
protection.
When
coating,
dissipates
force
by
87%
89%
control
upon
passive
active
impact,
respectively.
pad,
it
attenuates
91%
amplitude
high‐frequency
vibrations.
This
study
offers
perspective
on
synthesis
sterically
hindered
provides
valuable
insights
into
development
next‐generation
that
exhibit
vibration
resistance.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 3, 2025
Abstract
Electro‐optical
fibers
with
dual‐mode
sensing
ability
show
broad
potential
in
wearable
electronics
and
intelligent
human‐machine
interaction.
However,
the
complex
multi‐step
preparation
procedures
limited
environmental
adaptivity
materials
(stretchability,
healability,
recyclability,
etc.)
hinder
its
practical
applications.
Herein,
based
on
a
urea‐oxime
polyurethane,
fiber
integrating
electrical
two‐color
light‐emitting
functions
is
developed
using
one‐step
continuous
coaxial
wet‐spinning
process,
luminescent
sulfides‐doped
shell
layer
an
ionogel
conductive
core
layer.
The
exhibits
excellent
mechanical,
electrical,
optical
healing
capabilities
efficiencies
of
94%,
92%,
99%,
which
can
be
quickly
recycled
within
30
minutes.
Utilizing
electro‐optical
bimodular
perceptive
fiber,
multi‐scenario
applications
including
insect
phototaxis
monitoring,
luminous
wearables,
smart
tripwires
are
demonstrated,
revealing
superiority
programming
architectures
to
adapt
substrates
shape
or
size
diversity.
Moreover,
healing‐programmed
tailored
segments
demonstrated
for
hybrid
encrypted
information
transmission.
This
work
inspires
promising
healing‐programming
strategy
healable
wide
tactile
communicating.
Stretchable
electronic
skins
with
multifunctional
sensing
capabilities
are
of
great
importance
in
smart
healthcare,
wearable
display
electronics,
intelligent
robots,
and
human-machine
interfaces.
Thermoplastic
elastomers
play
a
pivotal
role
as
soft
substrate
the
field
stretchable
electronics.
However,
dynamic
interactions
common
thermoplastic
often
result
high
hysteresis
fatigue
damage,
limiting
their
performance
durability.
In
this
study,
highly
resilient
fatigue-resistant
elastomer
is
developed
by
employing
La3+-complexes
crosslinkers.
The
woven
structure
formed
between
prepolymer
ligands
lanthanum
(III)
metal
ions
establishes
stable
coordination
introduces
additional
entanglements
around
Furthermore,
self-assembles
into
hierarchical
nanoarchitectures,
which
serve
physical
crosslinks,
significantly
enhancing
mechanical
strength.
As
result,
new
exhibit
exceptional
strength
(Young's
modulus
≈3.47
MPa;
maximum
stress
≈16.52
MPa),
resilience
(residual
strain
during
cyclic
stretching
at
100%
≈8%),
resistance
(strength
retention
rate
≈90%
after
2000
cycles
stretching),
thermomechanical
properties
(creep
≈14.43%
residual
≈0.22%
80
°C
0.1
MPa).
Leveraging
high-performance
polyurethane
elastomer,
ultra-thin
flexible
electrodes
fabricated,
can
achieve
long-term
monitoring
physiological
signals
human
body.
