High-entropy thermal-stiffening hydrogels with fast switching dynamics
National Science Review,
Год журнала:
2025,
Номер
12(4)
Опубликована: Фев. 27, 2025
ABSTRACT
Thermal-stiffening
hydrogels
exhibit
a
dramatic
soft-to-stiff
transition
upon
heating,
making
them
ideal
candidates
for
temperature-triggered
self-protection
and
shape
memory
applications.
However,
their
practical
use
is
still
hampered
by
slow
recovery
process
(generally
>30
min)
during
cooling,
attributed
to
sluggish
mass
diffusion
delayed
phase
dissolution.
Herein,
we
present
high-entropy
separation
design
significantly
accelerate
the
dynamics
of
these
materials.
We
demonstrate
this
concept
using
thermal-stiffening
poly(calcium
acrylate)-based
copolymer
hydrogel
incorporating
hydrophilic
units.
Mechanistically,
units
disrupt
dense
packing
clusters,
creating
topological
structure
with
low
energy
barrier
rapid
diffusion.
This
approach
retains
impressive
response
760-fold
increase
in
storage
modulus,
while
dramatically
reducing
characteristic
time
merely
28
s.
anticipate
strategy
be
broadly
applicable
designing
modulus-adaptive
materials
fast
switching
dynamics.
Язык: Английский
Synergy design and performance optimization of hydrogel-based materials for solar driven water purification applications
Desalination,
Год журнала:
2025,
Номер
unknown, С. 118627 - 118627
Опубликована: Янв. 1, 2025
Язык: Английский
Synergistically Toughening Non‐Neutral Polyampholyte Hydrogels by Ionic and Coordination Bonds at Low Metal‐Ion Contents
Small,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 31, 2025
Abstract
Polyampholyte
(PA)
hydrogels,
composed
of
charged
hydrophilic
networks
with
both
positive
and
negative
groups,
have
attracted
great
attention
due
to
the
unique
structure
excellent
antifouling
properties.
Yet,
superhydrophilicity
usually
makes
non‐neutral
PA
(
n
‐PA)
gels
highly
swollen
mechanically
very
weak
in
aqueous
environments,
severely
limiting
their
applications.
Herein
metal‐coordination
bonds
are
designed
introduce
synergistically
toughen
‐PA
hydrogels
ionic
via
a
secondary
equilibrium
strategy.
In
design,
as‐prepared
dialyzed
metal‐ion
solutions
deionized
water
sequence
achieve
tough
gels.
Through
this
strategy,
can
be
significantly
toughened
by
synergy
bonds.
A
systematic
study
indicates
that
molar
ratio
oppositely
monomers
concentration
affect
mechanical
enhancements
clearly.
The
universality
proposed
strategy
is
further
proved
selecting
different
gel
systems
multivalent
metal
ions.
Notably,
low
concentrations
(≤0.1
m
)
dialysis
enable
synergistic
toughening.
Theoretical
models
also
adopted
disclose
toughening
mechanism.
This
work
not
only
expands
understanding
on
fabrication
strong
but
provides
some
insights
for
electrolyte
solutions.
Язык: Английский
Spider Webs‐Inspired Aluminum Coordination Hydrogel Piezoionic Sensors for Tactile Nerve Systems
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 28, 2024
Abstract
Piezoionics,
a
new
frontier
that
employs
mobile
ions
as
energy
and
charge
carriers,
plays
an
important
role
in
intelligent
electronics.
However,
significant
challenge
consists
balancing
the
structural
design
of
metal
coordination
hydrogel
(HG‐MI)
piezoionics
for
current
conduction,
voltage
generation,
especially
mechanical
adaptability.
Herein,
inspired
by
spider
webs'
unique
structure,
strategy
realizing
full
potential
metal‐ligand
([(OH)Cl
2
]
3−
)
to
facilitate
keggin‐type
structure
AlOHAlOH
generation
together
with
activate
functional
carboxyls
is
introduced.
Impressively,
whole
property
product
HG‐Al
PAC
,
performance
improved.
For
example,
toughness
2.75
MJ
m
−3
more
than
twofold
traditional
AS/AC/AN
samples.
Due
stable
fixation
─Al─OH─
thus
promoting
Cl
−
separation
upon
external
force,
achieves
piezoionic
coefficient
0.89
mV
KPa
−1
conversion
efficiency
1.29%,
promising
mechanical‐electrical
sensing.
Combined
good
excellent
properties,
underscores
its
tactile
nerve
system
analgesia
patients
prevent
them
from
being
injured.
This
work
intends
provide
stride
toward
mechanically
robust
self‐powered
sensors
offer
insights
into
ionotropic
materials
harvesting,
human‐machine
interaction,
biointerface.
Язык: Английский
Tuned quantum cutting efficiency by Li+/Na+ molar content in Li Na1-Gd(MoO4)2:Er3+/Yb3+ phosphors
Journal of Alloys and Compounds,
Год журнала:
2024,
Номер
1009, С. 176928 - 176928
Опубликована: Окт. 9, 2024
Язык: Английский
Multi‐Level Wettability Patterned Porous Matrix for Advanced Optical Information Encryption
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 30, 2024
Abstract
In
the
rapidly
evolving
landscape
of
information
security,
demand
for
optical
encryption
techniques
based
on
wettability
patterning,
which
allows
decryption
without
sophisticated
devices
and
complex
procedures,
is
progressively
increasing.
However,
conventional
approaches
binary
patterned
surfaces
impose
significant
constraints
in
their
practical
use
high‐level
security.
Herein,
a
novel
approach
to
optically
encrypt
through
multi‐level
patterning
introduced
porous
polymer
matrix
synthesized
from
vinyl
methacrylate
(VMA)
poly(ethylene
glycol)
diacrylate
(PEGDA).
By
employing
thiol‐ene
click
reaction,
precise
functional
groups
achieved
that
exhibit
distinct
responses
aqueous
solutions
with
varying
surface
tensions,
as
well
pH‐responsive
fluorescent
markers.
This
system
surpasses
traditional
hydrophilic/hydrophobic
patterns
by
providing
enhanced
control
over
states,
resulting
higher‐level
information.
The
integration
pH
fluorescence
responsivity
further
elevates
complexity
security
encrypted
information,
making
it
decipherable
only
under
specific
controlled
conditions.
innovative
offers
highly
secure,
robust,
customizable
method,
redefining
potential
technologies.
Язык: Английский