ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
17(1), С. 2339 - 2348
Опубликована: Дек. 26, 2024
Advanced
elastomers
with
outstanding
strength,
toughness,
and
reusability
hold
significant
potential
for
diverse
applications.
Using
photochemistry
mechanochemistry
to
develop
such
materials
has
become
a
very
effective
strategy.
Here,
we
report
that
photoreversible
coumarin-based
mechanophores
can
make
force-/light-triggered
cycloreversion
are
chemically
incorporated
into
polyurethane
simultaneously
enhance
their
strength
toughness.
Coumarin
dimer
mechanophore
cross-linkers
formed
in
the
elastomer
after
exposure
365
nm
irradiation,
leading
networks
dramatically
enhanced
mechanical
properties.
The
tensile
of
HNA-PU2000
coumarin
could
increase
from
13.9
26.9
MPa,
elongation
at
break
726
1053%,
toughness
25.6
119.7
MJ·m–3,
contrast
its
counterpart
without
mechanophores.
Additionally,
exhibits
decent
reusable
capability
via
under
stress
or
254
irradiation.
This
mechano-/photochemical
strategy
improve
provides
facile
approach
development
high-performance
materials.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 13, 2024
Abstract
Interfacing
intelligent
responsive
molecules
with
biocompatible
nanofibers
is
a
promising
strategy
for
developing
overheated
self‐managing
photothermal
dressings
convenient
and
cost‐effective
clinical
applications.
Here,
an
anisotropic
staggered
cellulose
nanocage
dressing
properties
constructed
by
temperature‐responsive
flexible
triblock
copolymer
Pluronic
®
F‐127
interpenetrating
smart
nanofiber
network
skeleton,
which
interfaced
white
light
(635
nm)
protoporphyrin
IX,
NIR‐I
(808
dopamine,
NIR‐II
(980
upconversion
nanoparticles.
Ingeniously,
the
can
release
1
O
2
produce
heat
energy
under
stimulation
continuous
natural
laser
during
anti‐inflammation
phase,
respectively,
further
promote
formation
of
new
capillaries
producing
NO
epithelial
stage
laser.
Interestingly,
dressing,
resembled
water
droplets,
penetrate
adapt
to
irregular
wounds
via
sol–gel
transformation
at
32
°C,
while
also
facilitating
management
self‐cooling
regulation
reconstruction
its
hydrogen
bond
driven
overheating
temperatures
(>50
°C).
The
proposed
method
overcomes
shortcoming
requiring
auxiliary
strategies
temperature
monitoring,
providing
insights
guiding
design
practical
dressings.
Macromolecular Rapid Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 26, 2024
Abstract
Potential
applications
of
colloidal
polymer
nanoparticles
in
the
preparation
smart
inks
are
investigated
by
physical
incorporation
oxazolidine
molecules.
Precise
adjusting
chain
flexibility
and
polarity
is
achieved
controlling
ratio
methyl
methacrylate
butyl
acrylate
monomers
polymerization
reaction.
In
addition,
nanofibrous
indicators
acid–base
vapors
prepared
from
latex
nanoparticles.
This
can
be
beneficial
for
creating
materials
that
sense
respond
to
environmental
changes,
such
as
humidity
or
moisture
acidity.
Thermochromic
microencapsulating
crystal
violet
lactone
dye
(CVL)
matrices
prevent
their
release
into
aqueous
media.
Combining
two
distinct
systems
with
varying
triggers,
light
temperature,
provides
an
effective
strategy
double‐encryption
anticounterfeiting
crack
scratch
detection
indication
applications.
Preparing
labels
impregnated
double‐responsive
inks,
a
novel
approach
developed
food
spoilage
preservation
indication.
Labels
manufactured
using
nanoparticles,
which
contain
photoluminescent
molecules,
well
trinary
mixture
CVL
within
core–shell
particles
thermochromic
dye.
The
combination
these
responsive
elements
transforms
traditional
packaging
dynamic
interactive
sentinel
it
holds.
Advanced Materials Technologies,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 31, 2024
Abstract
Wearable
technology
has
seen
rapid
advancement,
yet
the
integration
of
responsive
materials
into
wearable
devices
poses
significant
challenges,
particularly
in
maintaining
fabric
integrity
and
user
comfort
while
ensuring
sensitivity
responsiveness
to
environmental
stimuli.
In
this
work,
these
challenges
are
addressed
by
developing
an
ultra‐stable
hydrochromic
that
exhibits
both
hydro‐
halochromic
responsiveness.
Utilizing
a
bimolecular
fluoran
dye
system
composed
black
leuco
(ODB‐2)
weak
acid
developer
(benzyl
4‐hydroxybenzoate,
B4H),
embedded
robust
fibrous
matrix
constructed
through
electrospinning
process
with
thermoplastic
polyurethane
(TPU).
This
approach
ensures
breathability,
flexibility,
structural
fabrics,
hydrophobic
nature
TPU
contributes
stability
reversibility
hydro/halochromic
properties.
The
strategy
allows
for
immediate,
high‐contrast
color
changes
upon
exposure
water
acidic/basic
vapors.
These
fabrics
also
applied
rewritable
data
encryption,
demonstrating
their
potential
anti‐counterfeiting.
Furthermore,
investigation
mechanical
properties
confirms
durability
resilience,
making
them
ideal
technology.
Hydrogen,
Год журнала:
2024,
Номер
5(3), С. 403 - 413
Опубликована: Июль 7, 2024
Poly(vinyl
acetate)
nanofibers
doped
with
PdS-ZnS
nanoparticles
(PdS-ZnS/PVAc
nanofibers)
were
fabricated
via
an
electrospinning
technique.
in
situ
synthesized
by
adding
(NH4)2S
solution
to
poly(vinyl
acetate)/zinc
acetate/palladium
acetate
solution.
Electrospinning
of
the
formed
colloidal
led
formation
containing
uniformly
distributed
nanoparticles.
The
prepared
samples
characterized
field
emission
scanning
electron
microscopy,
X-ray
diffraction,
transmission
microscopy
and
Fourier
transform
infrared
spectroscopy.
In
photocatalytic
activity
investigation,
PdS-ZnS/PVAc
showed
remarkably
enhanced
performance
towards
water
photosplitting
under
solar
irradiation
compared
ZnS/PVAc
nanofibers.
This
is
attributed
synergistic
effects
heterostructured
nanoparticles,
which
can
improve
photogenerated
charge
migration
light
absorption.
