Mechanically
interlocked
networks
are
cross-linked
by
mechanically
polymers,
whose
dynamic
mechanical
bonding
provides
a
solid
foundation
for
their
application
in
materials
science.
Noncovalent
interactions
indispensable
linkages
building
supramolecular
polymers
but
exhibit
low
strength.
Therefore,
this
paper,
we
have
designed
and
synthesized
class
of
polymer
(MISPNs)
with
shape
memory
behavior,
using
which
prepared
gel
solvent-responsive
behavior
reversible
light
transmittance
changes
response
to
noncovalent
interactions.
It
was
found
that
the
naphthalene-functionalized
pillar[5]arene
(compound
3)
served
as
backbone
MISPNs,
its
topology
not
only
ensured
good
stability
also
endowed
properties
materials.
Meanwhile,
abundant
oxygen
(O)
sulfur
(S)
atoms
form
multiple
hydrogen
bonds
H
protonated
solvent,
contributes
transmission
The
herein
reported
MISPNs
offer
possible
strategy
development
multifunctional
properties,
sensitive
stimulus
excellent
smart
information
protection
properties.
Giant,
Год журнала:
2024,
Номер
19, С. 100299 - 100299
Опубликована: Июнь 5, 2024
In
the
era
of
smart
and
sustainable
technology
driven
by
naturally
occurring
materials,
various
nanocellulose-based
materials
play
a
crucial
role.
Shape
memory
behaviour
self-healing
capabilities
nanocelluloses
are
emerging
as
focal
points
in
numerous
research
domains.
Nanocellulose
its
derivatives
such
cellulose
nanocrystals
(CNC)
nanofibers
(CNF),
currently
limelight
due
to
their
excellent
shape-memory
properties,
making
them
suitable
for
multifunctional
devices.
this
regard,
CNF,
cutting-edge
material,
has
spurred
researchers
explore
potential
developing
contemporary
personalized
health
Therefore,
timely
comprehensive
review
is
essential
gain
deep
insights
into
effectiveness
CNF
Herein,
we
first
provide
succinct
introduction
all
nanocellulose
materials.
This
also
depicts
recent
advancements
breakthroughs
large
effective
synthesis
CNF-based
hybrid
Next,
focusing
on
performance,
sheds
new
light
advanced
applications
Finally,
perspectives
current
challenges
opportunities
field
summarized
future
an
in-depth
understanding
"CNF-based
materials."
Langmuir,
Год журнала:
2024,
Номер
40(31), С. 15957 - 15968
Опубликована: Июль 23, 2024
In
recent
years,
shape
memory
polymers
(SMPs)
and
self-healing
(SHPs)
have
been
research
hotspots
in
the
field
of
smart
owing
to
their
unique
stimulus
response
mechanisms.
Previous
on
SHPs
has
primarily
focused
contact
repair.
However,
instances
where
substantial
cracks
occur
during
practical
use,
autonomous
closure
becomes
challenging,
impeding
effective
By
integration
effect
(SME)
with
SHPs,
physical
wound
can
be
achieved
via
SME,
facilitating
subsequent
chemical/physical
repair
processes
enhancing
effectiveness.
This
article
reviews
key
findings
from
previous
memory-assisted
(SMASH)
materials
addresses
challenges
opportunities
for
future
investigation.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(1)
Опубликована: Авг. 13, 2024
Aiming
at
the
further
extension
of
application
scope
traditional
molecular
muscles,
a
novel
bispyrene-functionalized
chiral
[c2]daisy
chain
was
designed
and
synthesized.
Taking
advantage
unique
dimeric
interlocked
structure
chain,
resultant
muscle
emits
strong
circularly
polarized
luminescence
(CPL)
attributed
to
pyrene
excimer
with
high
dissymmetry
factor
(g
Abstract
Inspired
by
the
Mimosa
plant,
this
study
herein
develops
a
unique
dynamic
shape
memory
polymer
(SMP)
network
capable
of
transitioning
from
hard
to
pliable
with
heat,
featuring
reversible
actuation,
self‐healing,
recyclability,
and
degradability.
This
material
is
adept
at
simulating
functionalities
artificial
muscles
for
variety
tasks,
remarkable
specific
energy
density
1.8
J
g
−1
—≈46
times
higher
than
that
human
skeletal
muscle.
As
an
intelligent
manipulator,
it
demonstrates
proficiency
in
identifying
handling
items
high
temperatures.
Its
suitable
rate
recovery
around
body
temperature
indicates
its
promising
utility
as
implant
addressing
acute
obstructions.
The
covalent
bonding
within
structure
not
only
provides
excellent
resistance
solvents
but
also
bestows
abilities
reprocessing,
degradation.
These
attributes
significantly
boost
practicality
environmental
sustainability.
Anticipated
promote
advancements
sectors
biomedical
devices,
soft
robotics,
smart
actuators,
SMP
represents
forward
leap
muscles,
marking
stride
toward
future
adaptive
sustainable
technology.
Macromolecular Rapid Communications,
Год журнала:
2024,
Номер
45(23)
Опубликована: Окт. 7, 2024
Abstract
Diglycidyl
ether
of
bisphenol
A
crosslinking
with
glutaric
anhydride
is
used
to
form
the
conventional
“covalent
adaptive
network”,
polyether
sulfone
(PES)
by
coiling
and
aggregating
on
network
significantly
increase
uncured
resin
viscosity
for
improving
processability
epoxy
resin,
but
inevitably
affecting
curing
reaction
dynamic
transesterification
reaction.
This
study
investigates
crucial
roles
PES
in
dynamics
stress
relaxation
behavior.
The
results
indicate
that
although
does
not
directly
participate
polyester‐based
vitrimers.
Moreover,
isothermal
studies
reveal
addition
can
greatly
bring
forward
rate
peak
from
conversion
α
=
0.6
0.2,
meaning
mechanism
transfers
chemical
control
diffusion
control.
Dynamic
property
analysis
shows
accelerates
relaxation,
especially
at
lower
temperatures,
leading
low
viscous
flow
activation
energy
E
τ
relatively
insensitive
behavior
temperature.
Introducing
into
vitrimer
improves
density
(2.31
×
10⁴
mol
m
−
3
),
enhancing
glass
transition
temperature
(82.68
°C),
tensile
strength
(68.66
MPa),
fracture
toughness
(6.25%).
Additionally,
modified
exhibits
satisfying
shape
memory
performance
reprocessing
capability.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 27, 2024
Organic
photofunctional
materials
exhibit
properties
that
are
highly
dependent
on
their
structural
hierarchy.
The
variability
in
intermolecular
interactions
and
molecular
packing
both
monomeric
aggregated
states
complicates
the
controllability
predictability
of
photophysical
photochemical
properties.
To
address
this
challenge,
we
developed
three
luminescent
supramolecular
[
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 23, 2024
Abstract
As
a
unique
property
of
the
interlocked
structures,
rotaxane
allows
for
intramolecular
motions
between
its
wheel
and
axle
components.
Introduction
rotaxanes
into
polymers
can
endow
them
with
distinctive
macroscopic
features
outstanding
mechanical
properties.
Here,
we
prepare
copillar[5]arene
hydroxyl
an
amino‐group
on
each
end,
which
spontaneously
form
pseudo[1]rotaxane
through
hydrogen
bonds.
This
possesses
releasable
extra
alkyl
chain,
is
then
incorporated
linear
polyurethane
by
reacting
diisocyanate
to
elastomers
spring‐like
structures.
The
results
stress‐strain
test
dynamic
analysis
all
indicate
that
sliding
part
in
polymer
skeleton
greatly
dissipate
energy,
endows
higher
toughness
better
fatigue
resistance.
Moreover,
addition
moderate
amount
cuprous
bromide
cuprous‐thioether
coordination
further
improve
