Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 25, 2024
Abstract
Traditional
hydrogels
often
face
issues
like
dehydration,
excessive
swelling,
and
poor
adhesion,
limiting
their
practical
applications.
This
study
presents
a
facile
universal
method
to
create
elastomer‐encapsulated
with
improved
water
retention,
non‐swelling,
enhanced
adhesion.
n‐Butyl
acrylate
(BA)
2,2,3,4,4,4‐hexafluorobutyl
methacrylate
(HFBMA)
are
utilized
as
the
“soft”
“hard”
monomers,
respectively,
in
situ
construct
elastomer
coatings
on
hydrogel
surface
through
surface‐confined
copolymerization.
The
resulting
transparent,
hydrophobic,
adhesive
coating
is
tightly
bound
surface,
conferring
upon
it
robust
defense
against
dehydration
swelling
various
media,
strong
adhesion
diverse
substrates
both
aerial
submerged
conditions.
Furthermore,
this
encapsulation
strategy
also
augments
mechanical
attributes
of
bulk
hydrogel,
including
its
tensile
properties
puncture
resistance,
applicable
wide
array
types
configurations.
Additionally,
applied
conductive
results
flexible
sensors
high
sensitivity,
reversible
resistance
change,
exceptional
sensing
stability,
significantly
durability
air
underwater
environments.
These
suggest
potential
applications
harsh
environments,
such
acoustic
detection
sonar
scanning
camouflage
for
submarines.
Advanced Materials,
Год журнала:
2024,
Номер
36(31)
Опубликована: Май 28, 2024
Abstract
The
resistance
of
adhesives
to
organic
solvents
is
paramount
importance
in
diverse
industries.
Unfortunately,
many
currently
available
exhibit
either
weak
intermolecular
chain
interactions,
resulting
insufficient
solvents,
or
possess
a
permanent
covalent
crosslinked
network,
impeding
recyclability.
This
study
introduces
an
innovative
approach
address
this
challenge
by
formulating
zwitterionic
poly(ionic
liquid)
(ZPIL)
derivatives
with
robust
dipole–dipole
incorporating
sulfonic
anions
and
imidazolium
cations.
Due
its
unique
dynamic
electrostatic
self‐crosslinking
structure,
the
ZPIL
exhibits
significant
adhesion
various
substrates
demonstrates
excellent
recyclability
even
after
multiple
tests.
Significantly,
exceptional
stability
across
nonpolar
polar
including
ionic
liquids,
distinguishing
itself
from
nonionic
polymers
conventional
liquid)s.
Its
adhesive
performance
remains
minimally
affected
prolonged
exposure
soaking
conditions.
presents
promising
solution
for
design
highly
solvent‐resistant
materials
plastics,
coatings,
adhesives.
Conductive
eutectogels
have
emerged
as
candidates
for
constructing
functional
flexible
electronics
they
are
free
from
the
constraints
posed
by
inherent
defects
associated
with
solvents
and
feeble
network
structures.
Nevertheless,
developing
a
facile,
environmentally
friendly,
rapid
polymerization
strategy
construction
of
conductive
integrated
multifunctionality
is
still
immensely
challenging.
Herein,
eutectogel
fabricated
through
one-step
dialdehyde
xylan
(DAX)/liquid
metal
(LM)-initiated
deep
eutectic
solvent.
DAX
acts
stabilizer
preparation
LM
nanodroplets
plays
crucial
role
in
facilitating
ultrafast
gelation
(less
than
2
min)
virtue
its
reducing
groups.
Notably,
this
fabrication
obviates
use
toxic
chemical
initiators
cross-linkers.
The
resultant
exhibit
extremely
high
stretchability
(2860%),
desirable
self-healing
ability,
conductivity
(0.72
S
m–1),
biocompatibility,
excellent
environmental
stability,
exceptional
responsiveness
to
tensile
strain
(GF
=
4.08)
temperature
(TCR
5.35%
K–1).
Benefiting
these
features,
serve
multifunctional
sensors
human
motion
recognition
monitoring.
Furthermore,
serves
pliable
electrode
assembly
triboelectric
nanogenerator
(TENG),
designed
harvest
mechanical
energy,
convert
it
into
stable
electrical
outputs,
enable
self-powered
sensing.
This
study
offers
an
approach
fabricating
eutectogels,
making
step
closer
development
intelligent
electronics.
Materials Horizons,
Год журнала:
2023,
Номер
10(9), С. 3807 - 3820
Опубликована: Янв. 1, 2023
Zwitterionic
hydrogels
have
received
considerable
attention
owing
to
their
characteristic
structures
and
integrating
multifunctionality.
However,
the
superhydrophilicity-induced
poor
mechanical
properties
severely
hinder
potential
applications.
Besides,
from
perspective
of
wide
applications,
zwitterionic
with
integrated
high
properties,
conductivity
multifunctionalities
including
self-adhesive,
self-healing,
photothermal
are
highly
desirable
yet
challenging.
Herein,
a
new
class
high-performance
multifunctional
designed
based
on
incorporation
polydopamine-coated
liquid
metal
nanoparticles
(LM@PDA).
Due
efficient
energy
dissipation
endowed
by
isotropically
extensible
deformation
LM@PDA
multiple
interactions
within
hydrogel
matrix,
resultant
exhibited
ultrahigh
robustness
tensile
strength
up
1.3
MPa,
strain
1555%
toughness
7.3
MJ
m-3,
superior
or
comparable
those
most
hydrogels.
The
introduced
also
endows
conductivity,
versatile
adhesion,
autonomous
excellent
injectability,
three-dimensional
printability,
degradability,
conversion
performance.
These
preferable
enable
promising
as
wearable
sensors
sensory
capabilities
for
range
values
(1-500%),
pressures
(0.5-200
kPa)
temperatures
(20-80
°C)
an
impressive
temperature
coefficient
resistance
(up
0.15
°C-1).
Moreover,
these
can
be
applied
solar
evaporators
water
evaporation
rate
2.42
kg
m-2
h-1)
solar-thermal
efficiency
90.3%)
desalination
wastewater
purification.
present
work
pave
way
future
development
beyond.
Materials Horizons,
Год журнала:
2024,
Номер
11(11), С. 2628 - 2642
Опубликована: Янв. 1, 2024
A
zwitterionic
supramolecular
polymer
elastomer
with
one
ureido
group
and
carboxybetaine
on
the
side
chain
can
be
developed
as
an
IoT-based
self-powered
sensing
system
for
human
motion
monitoring.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 31, 2024
Abstract
Conductive
hydrogels
have
emerged
as
fascinating
materials
for
flexible
electronics
because
of
their
integrated
conductivity,
mechanical
flexibility,
and
the
possibility
to
introduce
several
smart
functions.
However,
swelling
in
aqueous
environments
significantly
reduces
applicability
where
contact
with
water
is
unavoidable.
In
this
study,
a
physically
cross‐linked
composite
hydrogel
proposed,
that
transparent,
highly
stretchable,
anti‐swelling,
capable
autonomous
self‐healing,
adhesive,
anti‐freezing.
The
synthesized
through
simple
one‐step
photopolymerization
novel
deep
eutectic
solvent
(DES)/water
system.
Dynamic
physical
interactions,
including
hydrophobic
interaction,
hydrogen
bonding,
electrostatic
confer
remarkable
transparency
(92%),
self‐healing
capability
(up
94%),
good
adhesion
wide
array
substrates
(91
199
kPa),
high
toughness
(1.46
MJ
m
−3
),
excellent
elongation
at
break
2064%),
resistance
(equilibrium
ratio
3%
30
days)
even
solutions
different
pH
(pH
1–11),
other
solvents.
incorporation
DES
contributes
exceptional
anti‐freezing
performance.
transparent
sensor
achieves
multifunctional
sensing
human
motion
detection
sensitivity
stability.
Notably,
demonstrates
information
transmission
underwater
stretching
pressing,
showcasing
its
immense
potential
devices.
Chemical Engineering Journal,
Год журнала:
2024,
Номер
485, С. 149696 - 149696
Опубликована: Фев. 20, 2024
The
demand
for
anti-icing
coatings
to
endure
extremely
low
temperatures
is
substantial.
Despite
the
innovative
pioneering
research
on
potential
of
ionic
liquids
(ILs),
development
such
still
in
its
infancy.
Our
study
investigates
how
matrix
hydrophobicity
influences
mobility
ILs
at
subzero
and,
consequently,
their
behavior.
Wettability
results
highlight
key
role
IL
anion
hydrophobicity.
Dielectric
spectroscopy
distinguishes
ion
temperatures.
We
also
investigate
varying
crosslink
density
affects
by
measuring
water
absorbency.
Higher
released
from
was
confirmed
presence
solutions,
validated
with
UV–vis
spectroscopy,
and
resulted
increased
conductivity.
Differential
scanning
calorimetry
experimental
setups
were
employed
assess
ice
formation
temperature,
time,
adhesion
strength.
Notably,
surfaces
containing
exhibited
a
remarkable
reduction
temperature
–23.5
℃
achieved
an
exceptionally
strength
(∼15
kPa),
attributed
quasi-liquid
layer
(QLL).
Solid-state
NMR
provided
confirmation
existence
QLL
interface.
Ice
examined
against
accelerated
weathering,
icing/de-icing
cycles,
as
well
endurance
frost
under
freeze–thaw.
findings
underscore
significance
selecting
right
regards
when
designing
subfreezing
applications.
Abstract
Hydrogels
are
currently
in
the
limelight
for
applications
soft
electronics
but
they
suffer
from
tendency
to
lose
water
or
freeze
when
exposed
dry
environments
low
temperatures.
Molecular
crowding
is
a
prevalent
occurrence
living
cells,
which
molecular
agents
modify
hydrogen
bonding
structure,
causing
significant
reduction
activity.
Here,
wide‐humidity
range
applicable,
anti‐freezing,
and
robust
hydrogel
developed
through
incorporation
of
natural
amino
acid
proline
(Pro)
conductive
MXene
into
polyvinyl
alcohol
(PVA)
networks.
Theoretical
calculations
reveal
that
Pro
can
transform
“free
water”
“locked
via
molecular‐crowding
effect,
thereby
suppressing
evaporation
ice
forming.
Accordingly,
prepared
exhibits
high
retention
capability,
with
77%
55%
being
preserved
after
exposure
20
°C,
28%
relative
humidity
(
RH)
35
90%
RH
12
h.
Meanwhile,
lowers
freezing
temperature
34
°C
enhances
its
stretchability
strength.
Finally,
PVA/Pro/MXene
hydrogels
assembled
as
multifunctional
on‐skin
strain
sensors
electrodes
monitor
human
motions
detect
tiny
electrophysiological
signals.
Collectively,
this
work
provides
strategy
will
motivate
researchers
develop
more
advanced
versatile
applications.
