Salt-welding strategy for the design of repairable impact-resistant and wear-resistant hydrogels
Jiangpeng Jia,
Shan Lu,
Shurui Sun
и другие.
Science Advances,
Год журнала:
2025,
Номер
11(4)
Опубликована: Янв. 24, 2025
Self-healing
hydrogels
can
autonomously
repair
damage,
enhancing
their
performance
stability
and
broadening
applications
as
soft
devices.
Although
the
incorporation
of
dynamic
interactions
enhances
self-healing
capabilities,
it
simultaneously
weakens
hydrogels’
strength.
External
stimuli
such
heating,
while
accelerating
healing
process,
may
also
lead
to
dehydration.
Developing
a
stable
strategy
that
combines
rapid
high
mechanical
strength
is
challenging.
Here,
we
introduce
“salt-welding”
for
high-strength
with
room
temperature
self-healing.
This
achieved
through
borate
ester
bonds
in
salt-responsive
poly(methacrylamide)
hydrogel.
The
process
involves
“salt-fusion”
convert
fractures
into
viscous
liquid
swift
healing,
followed
by
“salt-concretion”
toughen
achieve
posthealing
23
megapascals
95
minutes
at
temperature,
near
100%
efficiency.
Leveraging
tunable
rate,
hydrogel
be
tailored
reparable
wear-resistant
material
damping
device.
Язык: Английский
Mechanically robust and dynamic supramolecular polymer networks enabled by [an]daisy chain backbones
Science China Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 21, 2024
Язык: Английский
Diethyl-modified polydimethylsiloxane polymer-fluid-gels: Breakthrough of damping limits at ultra-low temperatures or ultra-high frequencies
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 162167 - 162167
Опубликована: Апрель 1, 2025
Язык: Английский
Designing High-Mechanical-Property Organic Polymeric Crystals: Insights from Stress Dispersion and Energy Dissipation Strategies
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 9, 2025
Despite
recent
significant
advancements
in
the
applications
of
organic
polymeric
crystals
(OPCs),
a
comprehensive
understanding
design
principles
for
high-mechanical-property
remains
somewhat
elusive.
Here,
we
investigate
mechanical
properties
OPCs
from
perspectives
stress
dispersion
and
energy
dissipation
by
examining
macrocycle
three
analogous
polymers
with
different
solvent
fillings,
utilizing
novel
research
platform
constructed
via
dative
B-N
bonds.
Through
thorough
study
investigation
into
molecular
mechanisms
these
model
topologies,
it
was
demonstrated
that
structural
expansion
filling
are
effective
pathways
enhancing
performance
employing
strategies.
Overall,
our
showcases
precise
control
over
topology
OPC
materials
elucidates
specific
modulating
their
performance,
offering
broader
perspective
efficiently
other
crystalline
polymers,
such
as
metal-organic
frameworks
(MOFs)
covalent
(COFs).
Язык: Английский
Multi‐Armed Molecule Drives High Energy Dissipation and Stiffness via Physically Cross‐Linking
Small,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 12, 2025
Abstract
Damping
materials,
particularly
viscoelastic
polymeric
are
essential
to
mitigate
or
even
eliminate
vibration
through
energy
dissipation.
However,
designing
pure
damping
materials
with
high
stiffness
remains
a
challenge,
which
limits
their
application
in
constrained
layer
treatments
for
mechanical
structures.
Herein,
chemical
design
of
yet
stiff
supramolecular
(SPMs)
cross‐linked
by
small
dendritic
molecules
quadruple
H‐bonding
units
at
the
branch
ends
is
proposed.
These
rationally
designed
not
only
enhance
chain
relaxation
and
improve
performance
original
topology,
but
also
maintain
resultant
level
due
newly
generated
robust
H‐bonds.
As
result,
these
SPMs
exhibit
excellent
across
wide
range
frequencies
temperatures,
while
simultaneously
demonstrating
key
characteristics
such
as
stiffness,
adhesive
properties,
recyclability.
Importantly,
employed
model
system
elucidate
molecular
mechanism
underlying
unique
combination
stiffness.
Язык: Английский
Hydrogen Bonding Enhanced Polysaccharide-Based Gels with Ultrahigh Stretchability and Unprecedented Crack Propagation Strain
Macromolecules,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 16, 2025
Язык: Английский
Solvent Polarity‐Induced Ultrahigh Strength Supramolecular Polyzwitterionic Organogels with Impact‐Stiffening, Damping, and Anti‐Freezing Properties
Small,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 24, 2025
Abstract
Widely
used
polyzwitterionic
hydrogels
usually
suffer
from
significant
mechanical
loss,
owing
to
the
strong
hydration
of
zwitterionic
groups.
Herein,
a
novel
solvent
polarity‐induced
strategy
is
introduced
for
developing
pure
supramolecular
organogels
with
ultrahigh
strength
by
using
facile
one‐pot
synthesis
process.
The
properties
these
can
be
well‐tuned
adjusting
polarity
dihydric
alcohol
solvents
regulate
hydrogen
bonding
and
dipole‐dipole
interactions
between
polymer
chains
in
organogel
network.
exhibit
superior
properties,
including
tensile
1.5
MPa,
elongation
at
break
669%,
toughness
3.2
MJ
m
−
3
,
adhesive
506
kPa.
Additionally,
display
outstanding
impact
response
performance
(maximum
strain‐stiffening
ratio
140
times,
maximum
impact‐stiffening
450
times)
energy
dissipation
(energy
above
60%,
loss
factor
2.0
1
Hz),
resulting
presence
inter‐molecular
internal
friction.
Notably,
synergistic
groups
on
side
organic
impart
flexibility
vibration
absorption
capabilities
even
low‐temperature
environments.
Furthermore,
demonstrate
flaw‐insensitivity,
self‐healing
ability,
water
processability,
broadening
their
applicability
more
complex
conditions.
Язык: Английский
Principles for designing sustainable and high-strain rate stress wave dissipating materials
Materials Horizons,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Dynamic
covalent
networks
serve
as
effective
tools
for
dissipating
high-strain
rate
mechanical
energy
throughout
reversible
bond
exchange
reactions.
Despite
their
potential,
a
gap
exists
in
understanding
how
polymer
chain
mobility
and
the
kinetics
of
reactions
impact
capabilities
dynamic
networks.
This
study
presents
an
optimal
strategy
to
enhance
dissipation
by
controlling
side
structures
rates
Lipoic
acid-derived
polymers
are
chosen
our
model
system
due
easily
tunable
chains
disulfide-rich
backbones.
High-strain
stress
waves
subjected
using
laser-induced
shock
wave
technique.
A
strong
correlation
is
observed
between
capability
glass
transition
temperature
poly(disulfide)s.
Furthermore,
addition
catalyst
accelerate
disulfide
reaction
improves
dissipation.
Leveraging
inherent
nature
cyclic
disulfides,
exhibit
self-healing
chemical
recycling
monomers.
The
principles
this
provide
rational
framework
designing
sustainable
efficient
materials.
Язык: Английский