Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 22, 2025
Abstract
Dynamic
covalent
polymer
networks
(DCPN)
provide
an
important
solution
to
the
challenging
recyclability
of
thermoset
elastomers.
However,
dynamic
bonds
exhibit
relatively
weak
bond
energies,
considerably
decreasing
mechanical
properties
DCPN.
Herein,
a
novel
reinforcement
strategy
for
DCPN
involving
in
situ
formation
supramolecular
organic
nanofillers
through
asynchronous
polymerization
is
proposed.
Owing
difference
reactivity
isocyanate
groups
and
gradual
deblocking
aldimine,
cross‐linking
hexamethylene
diisocyanate
isocyanate‐terminated
prepolymer
containing
oxime–urethane
with
deblocked
tris(2‐aminoethyl)amine
facilitates
transition
from
molecular
interpenetration
chains
into
immiscible
polymerization.
This
results
thermodynamic
incompatibility
between
hyperbranched
clusters
long
chains,
inducing
spontaneous
nanofillers.
Compared
traditional
strategies,
improve
Furthermore,
interactions
enable
network
excellent
recyclability.
The
unique
prepared
allow
their
combination
carbon
fibers
(CF)
form
CF
composites
outstanding
personal‐protection
applications,
achieving
composite
upcycling.
study
offers
on
upcycling
high‐performance
composites.
Advanced Materials,
Год журнала:
2023,
Номер
35(39)
Опубликована: Март 12, 2023
Abstract
Polyimides
(PIs)
are
widely
used
in
circuit
components,
electrical
insulators,
and
power
systems
modern
electronic
devices
large
appliances.
Electrical/mechanical
damage
of
materials
important
factors
that
threaten
reliability
service
lifetime.
Dynamic
(self‐healable,
recyclable
degradable)
PIs,
a
promising
class
successfully
improve
electrical/mechanical
properties
after
damage,
anticipated
to
solve
this
issue.
The
viewpoints
perspectives
on
the
status
future
trends
dynamic
PI
based
few
existing
documents
shared.
main
forms
dielectric
application
process
first
introduced,
initial
strategies
schemes
these
problems
proposed.
Fundamentally,
bottleneck
issues
faced
by
development
PIs
indicated,
relationship
between
various
universality
method
is
evaluated.
potential
mechanism
deal
with
highlighted
several
feasible
prospective
address
discussed.
This
study
concluded
presenting
short
outlook
improvements
systems,
challenges,
solutions
insulation.
summary
theory
practice
should
encourage
policy
favoring
energy
conservation
environmental
protection
promoting
sustainability.
Chemical Reviews,
Год журнала:
2024,
Номер
124(12), С. 7829 - 7906
Опубликована: Июнь 3, 2024
Covalent
network
polymers,
as
materials
composed
of
atoms
interconnected
by
covalent
bonds
in
a
continuous
network,
are
known
for
their
thermal
and
chemical
stability.
Over
the
past
two
decades,
these
have
undergone
significant
transformations,
gaining
properties
such
malleability,
environmental
responsiveness,
recyclability,
crystallinity,
customizable
porosity,
enabled
development
integration
dynamic
chemistry
(DCvC).
In
this
review,
we
explore
innovative
realm
polymers
focusing
on
recent
advances
achieved
through
application
DCvC.
We
start
examining
history
fundamental
principles
DCvC,
detailing
its
inception
core
concepts
noting
key
role
reversible
bond
formation.
Then
reprocessability
DCvC
is
thoroughly
discussed,
starting
from
milestones
that
marked
evolution
progressing
to
current
trends
applications.
The
influence
crystallinity
then
reviewed,
covering
diversity,
synthesis
techniques,
functionalities.
concluding
section,
address
challenges
faced
field
speculates
potential
future
directions.
Advanced Materials,
Год журнала:
2023,
Номер
35(31)
Опубликована: Май 18, 2023
Abstract
On‐demand
adhesive
dismantling
has
the
potential
to
improve
multimaterial
product
recycling,
but
its
implementation
been
hampered
by
a
critical
trade‐off
between
strong
bonding
and
easy
debonding.
As
result,
temperature
range
in
which
these
temporary
adhesives
can
be
used
is
relatively
limited.
Here,
new
class
of
dynamic
epoxy
resins
reported
that
significantly
extends
this
upper
limit
still
achieves
fast
Specifically,
two
types
polyamidoamine
curing
agents
for
hardening
are
developed,
being
polysuccinamides
(PSA)
polyglutaramides
(PGA).
debonding/rebonding
process
PSA
especially
PGA
linkages
more
thermally
demanding
at
same
time
robust
than
previously
covalent
systems,
resulting
materials
triggered
high
temperatures,
remain
bonded
over
wide
range.
The
versatility
system
demonstrated
classical
bulk
formulations,
as
well
linking
PSA‐
or
PGA‐functionalized
surface.
an
attractive
drop‐in
strategy
achieved
producing
debondable
rebondable
adhesives,
with
complementarity
existing
resin
technologies
applicable
industrially
relevant
window.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(9), С. 11957 - 11972
Опубликована: Фев. 23, 2024
The
usage
of
a
conductive
hydrogel
in
wearable
sensors
has
been
thoroughly
researched
recently.
Nonetheless,
hydrogel-based
cannot
simultaneously
have
excellent
mechanical
property,
high
sensitivity,
comfortable
wearability,
and
rapid
self-healing
performance,
which
result
poor
durability
reusability.
Herein,
robust
derived
from
one-pot
polymerization
subsequent
solvent
replacement
is
developed
as
sensor.
Owing
to
the
reversible
hydrogen
bonds
cross-linked
between
polymer
chains
clay
nanosheets,
resulting
sensor
exhibits
outstanding
flexibility,
self-repairing,
fatigue
resistance
performances.
embedding
graphene
oxide
nanosheets
offers
an
enhanced
network
easy
release
target
position
through
remote
irradiation,
while
Li+
ions
incorporated
by
endow
with
low
detection
limit
(sensing
strain:
1%),
conductivity
(4.3
S
m–1)
sensitivity
(gauge
factor:
3.04),
good
freezing
resistance,
water
retention.
Therefore,
fabricated
suitable
monitor
small
large
human
motions
on
site
remotely
under
subzero
(−54
°C)
or
room
temperature,
indicating
lots
promising
applications
human-motion
monitoring,
information
encryption
identification,
electronic
skins.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 2, 2024
Abstract
The
development
of
multifunctional
bio‐adhesive
plays
a
critical
role
in
achieving
sustainable
society,
where
the
intrinsic
sensitivity
to
water
and
poor
dynamics
severely
bottlenecks
its
scale‐up
application.
Inspired
by
microstructure
dragonfly
wings,
strong
tough
adhesive
with
excellent
reprocessability
is
designed
developed
creating
dynamic
network
consisting
lignin
polyurea
(LPU)
framework
soybean
protein
(SP).
LPU
act
as
rigid
nervures
slow
crack
propagation
transfer
stress,
while
SP
dissipate
strain
energy
through
interplay
from
graded
hydrogen
imine
bonds
generated
between
SP.
achieves
significant
enhancements
fracture
toughness
resistance
≈7
23
folds,
respectively,
compared
Furthermore,
capacity
for
diffusion
restoration
endows
superior
reprocessability,
enabling
recycled
particleboard
achieve
high
retention
modules
(over
80%).
This
approach
offers
promising
eco‐friendly
alternative
conventional
petrochemical
adhesive.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(10)
Опубликована: Янв. 18, 2024
Abstract
Supramolecular
polymer
networks
(SPNs),
crosslinked
by
noncovalent
bonds,
have
emerged
as
reorganizable
and
recyclable
polymeric
materials
with
unique
functionality.
However,
poor
stability
is
an
imperative
challenge
faced
SPNs,
because
SPNs
are
susceptible
to
heat,
water,
and/or
solvents
due
the
dynamic
reversible
nature
of
bonds.
Herein,
design
a
cooperative
network
(NCoN)
simultaneously
stabilize
reinforce
reported,
resulting
in
ultrastable,
superrobust,
SPN.
The
NCoN
constructed
multiplying
H‐bonding
sites
tuning
conformation/geometry
segment
optimize
multivalence
cooperativity
H‐bonds.
rationally
designed
high
conformational
compliance
favors
formation
tightly
packed
H‐bond
arrays
comprising
higher‐density
stronger
Consequently,
H‐bonded
crosslinks
display
covalent
crosslinking
effect
but
retain
on‐demand
dynamics
reversibility.
resultant
ultrastable
SPN
not
only
displays
remarkable
resistance
heat
up
120
°C,
water
soaking,
broad
spectrum
solvents,
also
possesses
superhigh
true
stress
at
break
(1.1
GPa)
ultrahigh
toughness
(406
MJ
m
−3
).
Despite
covalent‐network‐like
stability,
through
activating
its
reversibility
high‐polarity
solvent
heated
threshold
temperature.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Июнь 7, 2024
The
regulation
of
topological
structure
covalent
adaptable
networks
(CANs)
remains
a
challenge
for
epoxy
CANs.
Here,
we
report
strategy
to
develop
strong
and
tough
supramolecular
thermosets
with
rapid
reprocessability
room-temperature
closed-loop
recyclability.
These
were
constructed
from
vanillin-based
hyperbranched
resin
(VanEHBP)
through
the
introduction
intermolecular
hydrogen
bonds
dual
dynamic
bonds,
as
well
formation
intramolecular
cavities.
structures
confer
remarkable
energy
dissipation
capability
thermosets,
leading
high
toughness
strength.
Due
imine
exchange
reversible
noncovalent
crosslinks,
can
be
rapidly
effectively
reprocessed
at
120
°C
within
30
s.
Importantly,
efficiently
depolymerized
room
temperature,
recovered
materials
retain
structural
integrity
mechanical
properties
original
samples.
This
may
employed
design
tough,
recyclable
practical
applications.
Advanced Materials,
Год журнала:
2024,
Номер
36(33)
Опубликована: Июнь 13, 2024
Abstract
Plastics,
renowned
for
their
outstanding
properties
and
extensive
applications,
assume
an
indispensable
irreplaceable
role
in
modern
society.
However,
the
ubiquitous
consumption
of
plastic
items
has
led
to
a
growing
accumulation
waste.
Unreasonable
practices
production,
utilization,
recycling
plastics
have
substantial
energy
resource
depletion
environmental
pollution.
Herein,
state‐of‐the‐art
advancements
lifecycle
management
are
timely
reviewed.
Unlike
typical
reviews
focused
on
recycling,
this
work
presents
in‐depth
analysis
entire
plastics,
covering
whole
process
from
synthesis,
processing,
ultimate
disposal.
The
primary
emphasis
lies
selecting
judicious
strategies
methodologies
at
each
stage
mitigate
adverse
impact
waste
plastics.
Specifically,
article
delineates
rationale,
methods,
realized
various
stages
through
both
physical
chemical
pathways.
focal
point
is
attainment
optimal
rates
thereby
alleviating
ecological
burden
By
scrutinizing
aims
furnish
comprehensive
solutions
reducing
pollution
fostering
sustainability
across
all
facets
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 29, 2024
Abstract
Epoxy
resins‐based
engineering
plastics
are
indispensable
in
the
global
economy,
but
they
have
created
a
serious
waste
crisis
caused
by
their
chemical
cross‐linked
networks.
To
solve
this
problem,
current
strategies
often
require
assistance
of
catalysts
or
solvents
at
expense
thermal
and
mechanical
performance.
In
work,
high‐performance
epoxy
resin
featuring
dynamic
ester
disulfide
bonds
(TDS)
is
reported,
which
exhibits
higher
properties
than
common
plastics,
i.e.,
tensile
strength
modulus
66.6
MPa
2.63
GPa,
flexural
103.2
3.52
glass
transition
temperature
(
T
g
)
133
°C.
Moreover,
reversible
transformation
between
aromatic
thiyl
radicals
endows
TDS
with
autonomous
visualization
damage
healing.
addition,
harmonious
interplay
bonds‐promoted
tertiary
amine
accelerated
topological
network
rearrangements,
enabling
to
easily
reshape
weld.
Specifically,
can
be
completely
degraded
pure
water
200
°C
without
any
catalyst,
products
directly
re‐polymerized
achieve
green
closed‐loop
recycling.
This
work
proposes
simple
economical
strategy
for
development
resin‐based
cutting‐edge
that
both
functional
sustainable.
