The
construction
of
high-strength
hydrogels
is
essential
for
engineering
applications
but
often
limited
by
poor
durability
under
stress.
Current
post-treatment
methods
are
inefficient
and
time
consuming.
Inspired
muscle
building,
we
propose
a
green,
efficient,
synergistic
enhancement
method.
dynamic
stretching
the
PVA
hydrogel
in
LS
solution
promotes
formation
an
ordered
polymer
network,
while
can
fix
structure.
After
500
cycles
(approximately
16.7
min),
tensile
strength,
toughness,
Young's
modulus
increase
76-fold,
117-fold,
304-fold,
respectively,
outperforming
single
treatments
such
as
soaking
or
training.
Multitechnique
analyses
reveal
that
nanoscale
crystalline
domains
microscale-ordered
polymers
drive
these
macroscopic
improvements.
Notably,
be
substituted
with
other
solvents
to
achieve
similar
effects,
demonstrating
excellent
adaptability,
scalability,
efficiency.
This
rapid
straightforward
technology
holds
great
promise
overcoming
challenges
constructing
applying
hydrogels.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(10), С. 5291 - 5337
Опубликована: Янв. 1, 2024
Design
principles,
engineering
strategies,
challenges,
and
opportunities
of
gel
polymer
electrolytes
for
rechargeable
batteries
toward
wide-temperature
applications
are
thoroughly
reviewed.
Materials Today,
Год журнала:
2024,
Номер
74, С. 67 - 76
Опубликована: Март 12, 2024
While
cellulose-based
stretchable
hydrogels
have
been
extensively
explored
in
recent
years,
all-cellulose
continue
to
face
the
limitation
of
low
stretchability
(less
than
250
%).
Herein,
for
first
time,
we
fabricate
an
hydrogel
with
ultrahigh
that
can
exceed
40000
%
strain.
By
ring
opening
reaction
on
cellulose
anhydroglucose
unit
rings,
secondary
hydroxyls
are
converted
primary
hydroxyls,
enabling
enhanced
chain
flexibility,
and
facilitating
formation
abundant
hydrogen
bonds.
As
a
result,
obtained
displays
remarkable
characteristics,
including
record-high
(44200
%),
rapid
self-healing
property
(within
seconds),
unique
ability
form
fiber.
With
simple
drawing,
smooth
flexible
fiber
be
obtained,
demonstrating
good
processability
high
tensile
strength
226
MPa.
Furthermore,
function
as
human
motion
sensor
electrocardiogram
electrode
monitoring
physiological
signals.
This
yet
highly
effective
method
will
not
only
propel
advancement
ultrastretchable
but
also
create
new
possibilities
wearable
device
applications.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 10, 2024
Abstract
Supramolecular
hydrogels
are
typically
assembled
through
weak
non‐covalent
interactions,
posing
a
significant
challenge
in
achieving
ultra
strength.
Developing
higher
strength
based
on
molecular/nanoscale
engineering
concepts
is
potential
improvement
strategy.
Herein,
super‐tough
supramolecular
hydrogel
by
gradually
diffusing
lignosulfonate
sodium
(LS)
into
polyvinyl
alcohol
(PVA)
solution.
Both
simulations
and
analytical
results
indicate
that
the
assembly
subsequent
enhancement
of
crosslinked
network
primarily
attributed
to
LS‐induced
formation
gradual
densification
strong
crystalline
domains
within
hydrogel.
The
optimized
exhibits
impressive
mechanical
properties
with
tensile
≈20
MPa,
Young's
modulus
≈14
toughness
≈50
MJ
m⁻
3
,
making
it
strongest
lignin‐PVA/polymer
known
so
far.
Moreover,
LS
provides
excellent
low‐temperature
stability
(<‐60
°C),
antibacterial,
UV‐blocking
capability
(≈100%).
Interestingly,
diffusion
ability
demonstrated
for
self‐restructuring
damaged
hydrogel,
3D
patterning
surfaces,
enhancing
local
freeze‐thaw
PVA
goal
foster
versatile
platform
combining
eco‐friendly
biocompatible
PVA,
paving
way
innovation
interdisciplinarity
biomedicine,
materials,
forestry
science.
Advanced Materials,
Год журнала:
2024,
Номер
36(44)
Опубликована: Авг. 29, 2024
Low-hysteresis
merits
can
help
polymeric
gel
materials
survive
from
consecutive
loading
cycles
and
promote
life
span
in
many
burgeoning
areas.
However,
it
is
a
big
challenge
to
design
low-hysteresis
tough
materials,
especially
for
ionogels.
This
be
attributed
the
fact
that
higher
viscosities
of
ionic
liquids
(ILs)
would
increase
chain
friction
gels
eventually
dissipate
large
amounts
energy
under
deformation.
Herein,
chemical
ionogels
proposed
achieve
characteristics
both
mechanical
electric
aspects
via
hierarchical
aggregates
formed
by
supramolecular
self-assembly
quadruple
H-bonds
soft
IL-rich
matrix.
These
self-assembled
nanoaggregates
not
only
greatly
reinforce
matrix
enhance
resilience,
but
also
exhibit
low-energy-dissipating
features
stress
conditions,
simultaneously
benefiting
properties.
toughness
subsequent
anti-fatigue
properties
response
external
cyclic
stimuli.
More
importantly,
these
are
presented
as
model
system
elucidate
underlying
mechanism
low
hysteresis
fatigue
resistance.
Based
on
findings,
further
demonstrated
strategy
universal.
