Macromolecules,
Journal Year:
2024,
Volume and Issue:
57(21), P. 9950 - 9959
Published: Oct. 16, 2024
This
work
discloses
a
new
strategy
based
on
dynamic
cross-linking
chemistry
to
achieve
advanced
one-component
thermosets
combining
ultralong
storage
life
and
fast
cross-linking.
One-component
containing
resin
cross-linker
in
one
pot
have
the
features
of
simple
operation,
stable
quality,
low
waste;
however,
an
urgently
needed
with
long
at
room
temperature
medium–low
temperatures
(≤130
°C)
remains
enormous
challenge.
Herein,
we
innovatively
propose
controlled
dissolution
address
this
issue.
As
example,
cross-linked
(DCC)
is
synthesized
via
Diels–Alder
reaction
hide
high
activity
commercial
amine-type
cross-linker.
A
thermoset
from
DCC
diepoxy
monomer
can
be
stored
for
time
rapidly
below
130
°C.
Moreover,
also
serve
as
latent
accelerator
epoxy/anhydride
same
control
system
no
elevated
temperatures.
beneficial
promoting
application
meeting
urgent
need
fields
composites,
coatings,
electronic
packaging
materials,
automotive
adhesives,
etc.
ACS Macro Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 169 - 175
Published: Jan. 26, 2025
Stimuli-responsive
polymers
have
demonstrated
significant
potential
in
the
development
of
smart
materials
due
to
their
capacity
undergo
targeted
property
changes
response
external
physical
or
chemical
stimuli.
However,
scales
most
existing
stimuli-responsive
polymer
systems
are
mainly
focused
on
three
levels:
functional
units,
chain
conformations,
topologies.
Herein,
we
developed
a
covalent
network
(CPN)
capable
converting
into
supramolecular
(SPN)
within
bulk
directly
at
scale
types.
This
transformation
is
enabled
by
specifically
designed
moieties
that
upon
UV
exposure
reveal
quadruple
hydrogen
bonding
sites,
allowing
formation
network.
network-type
transition
from
CPN
SPN
induces
pronounced
intrinsic
material
properties,
including
substantially
increased
breaking
elongation,
lower
Young's
modulus,
reduced
fracture
strength,
and
decreased
creep
resistance,
marking
shift
stable,
rigid
structure
dynamic,
adaptable
one.
These
findings
provide
new
insights
design
advanced
through
transformations,
opening
avenues
for
applications
multifunctional
materials.
Developing
damping
materials
that
are
both
optically
transparent
and
mechanically
robust,
while
offering
broad
frequency
capacity,
is
a
significant
challenge─particularly
for
devices
require
protection
without
compromising
visual
clarity.
Conventional
methods
often
either
fail
to
maintain
transparency
or
involve
complex
designs
difficult
implement.
Here,
we
present
an
ionogel
system
integrates
physically
cross-linked
elastic
copolymer
network
with
viscous
ionic
liquid.
The
competitive
interactions
between
the
liquid
polymer
enable
fine-tuning
of
mechanical
stability
capacity.
resulting
robust
exhibits
excellent
over
wide
range.
Remarkably,
thin
layer
(0.15
mm)
absorbs
nearly
60%
impact
force
retains
its
performance
after
exposure
extreme
conditions.
This
approach
offers
straightforward
method
designing
advanced
meet
aesthetic
functional
demands
modern
technologies.
ACS Omega,
Journal Year:
2025,
Volume and Issue:
10(10), P. 9890 - 9902
Published: March 3, 2025
Metal-Organic
Frameworks
(MOFs),
as
a
new
type
of
porous
material,
have
attracted
widespread
attention
in
the
fields
chemistry,
materials
science,
and
biomedicine
owing
to
their
unique
structural
characteristics
potential
for
functionalization.
This
review
summarizes
latest
research
progress
MOFs
field
steroid
compounds,
including
purification
separation
steroids,
sensing
detection,
catalytic
transformation,
drug
delivery.
First,
we
explore
how
structure
chemical
functionalization
achieve
efficient
compounds.
Second,
high
sensitivity
selectivity
well
application
actual
sample
analysis,
are
analyzed.
Furthermore,
role
transformation
reactions
is
discussed,
performance
catalysts
or
catalyst
carriers.
Finally,
focus
on
innovative
applications
delivery
systems,
especially
advantages
controlled
release
targeted
article
also
explores
future
development
trends
prospects
highlighting
challenges
opportunities
material
design,
strategies,
practical
implementations.
Through
this
review,
aim
provide
comprehensive
theoretical
basis
guidance
further
steroids.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 2, 2025
Visualizing
the
sliding
dynamics
of
a
topological
network
can
provide
critical
insight
into
determining
design
and
properties
mechanically
interlocked
materials.
Although
several
auxiliary
techniques
have
been
proposed
to
infer
microscopic
motion
rotaxanes,
employing
intuitive
convenient
methods
explore
polymer
remains
significant
challenge.
Herein,
this
work
introduces
(MIN)
patterned
surfaces
for
visualizing
regulating
process
[2]rotaxane
units
through
evolution
surface
wrinkles.
Upon
photodimerization
anthracene-functionalized
chain,
wrinkle
be
formed
after
thermal
treatment
subsequent
cooling
room
temperature.
Specifically,
cross-linked
films
exhibit
visible
changes
in
topography
disruption
host-guest
recognition
by
alkaline
stimuli.
Moreover,
leveraging
unique
mechanical
wrinkles,
we
prolonged
amplified
originally
extremely
transient
difficult-to-detect
rotaxane
terms
time
scale.
Through
statistical
analysis
morphology,
were
able
correspondingly
deconstruct
three
processes
motion:
(I)
unrestricted
rapid
following
dissociation;
(II)
restricted
sliding;
(III)
termination
sliding.
The
novel
approach
propose
opens
new
avenue
studying
molecular
materials,
facilitating
advancement
application
structures.
In
addition
using
macroscopic
patterns
visualize
motion,
molecules
also
used
regulate
patterns.
Advanced Physics Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 4, 2025
Abstract
Bioelectronics,
which
integrate
biological
systems
with
electronic
components,
have
attracted
significant
attention
in
developing
biomimetic
materials
and
advanced
hardware
architectures
to
enable
novel
information‐processing
systems,
sensors,
actuators.
However,
the
rigidity
of
conjugated
molecular
lack
reconfigurability
static
crosslinked
structures
pose
challenges
for
flexible
sensing
applications.
Topological
networks
(TCNs)
featuring
dynamic
interactions
offer
enhanced
flexibility
environmentally
induced
reconfigurability,
decoupling
competition
between
performances.
Here,
recent
advances
are
summarized
assembly
methods
bioelectronics
different
TCNs
elaborate
ion/electron‐transport
mechanisms
from
perspective
interactions.
Decoupling
effects
can
be
achieved
by
comparing
distinct
their
respective
properties,
an
outlook
is
provided
on
a
new
range
neuromorphic
biocompatibility,
self‐healing,
self‐powered,
multimodal‐sensing
capabilities.
The
development
TCN‐based
significantly
impact
fields
artificial
perception
devices,
networks,
systems.
Realizing
organic
phase-change
material
networks
with
excellent
recyclability
while
maintaining
high
latent
heat
still
faces
great
challenges
due
to
the
difficult
trade-off
between
network
composition.
Herein,
and
recyclable
materials
(RPCMs)
were
developed
by
integrating
linear
poly(ethylene
glycol)
(PEG)
multimers
as
components
dynamic
covalent
cross-linking
polyurethane
in
a
semi-interpenetrating
polymer
structure.
The
(54.7-145.0
J/g)
can
be
readily
tuned
weight
fraction
of
PEG
molecular
PEGs
used
RPCMs.
RPCMs
have
recyclability/reprocessability
activation
energy
81.23-125.84
kJ/mol
introducing
disulfide
bonds
structure
enabling
adjustable
mechanical
stress
(10.72-14.04
MPa)
strain
(7.40-266.22%),
thermal
reliability,
stability.
Efficient
photothermal
realized
polydopamine
particles
RPCM
matrix.
management
system
photothermoelectric
generator
designed
based
on
advantages
efficient
ability
further
demonstrated
properties.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(28)
Published: April 24, 2024
Abstract
Polymers
are
ideally
utilized
as
damping
materials
due
to
the
high
internal
friction
of
molecular
chains,
enabling
effective
suppression
vibrations
and
noises
in
various
fields.
Current
strategies
rely
on
broadening
glass
transition
region
or
introducing
additional
relaxation
components
enhance
energy
dissipation
capacity
polymeric
materials.
However,
it
remains
a
significant
challenge
achieve
efficiency
through
structural
control
while
maintaining
dynamic
characteristics.
In
this
work,
we
propose
new
strategy
develop
hyperbranched
vitrimers
(HBVs)
containing
dense
pendant
chains
loose
crosslinked
networks.
A
novel
yet
weak
transesterification
between
carboxyl
boronic
acid
ester
was
confirmed
used
prepare
HBVs
based
poly
(hexyl
methacrylate‐2‐(4‐ethenylphenyl)‐5,5‐dimethyl‐1,3,2‐dioxaborinane)
P(HMA‐
co
‐ViCL)
copolymers.
The
‐type
macromonomers,
crosslinking
points
formed
by
covalent
connection
via
associative
exchange,
exchange
reaction
three
keys
developing
high‐performance
HBV
We
found
that
20k‐40‐60
exhibited
ultrahigh
energy‐dissipation
performance
over
broad
frequency
temperature
range,
attributed
synergistic
effect
crosslinks.
This
unique
design
concept
will
provide
general
approach
advanced
