Journal of Materials Chemistry B,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
In
recent
years,
the
development
of
biodegradable,
cell-adhesive
polymeric
implants
and
minimally
invasive
surgery
has
significantly
advanced
healthcare.
These
materials
exhibit
multifunctional
properties
like
self-healing,
shape-memory,
cell
adhesion,
which
can
be
achieved
through
novel
chemical
approaches.
Engineering
such
their
scalability
using
a
classical
polymer
network
without
complex
synthesis
modification
been
great
challenge,
potentially
resolved
biobased
dynamic
covalent
chemistry
(DCC).
Here,
we
report
scalable,
self-healable,
poly(ε-caprolactone)
(PCL)-based
vitrimer
scaffold,
imine
exchange,
free
from
limitations
melting
transitions
supramolecular
interactions
in
4D-printed
PCL.
PCL's
typical
hydrophobicity
hinders
adhesion;
however,
our
design,
based
on
photopolymerization
PCL-dimethacrylate
methacrylate-terminated
vanillin-based
imine,
achieves
water
contact
angle
64°.
The
network,
fabricated
varying
proportions,
exhibited
co-continuous
phase
morphology,
achieving
optimal
shape
fixity
(91
±
1.7%)
recovery
(92.5
0.1%)
at
physiological
temperature
(37
°C).
Additionally,
scaffold
promoted
adhesion
proliferation
reduced
oxidative
stress
defect
site.
This
material
shows
potential
DCC-based
research
developing
smart
biomedical
devices
with
geometries,
paving
way
for
applications
regenerative
medicine
implant
design.
Chemical Reviews,
Год журнала:
2021,
Номер
121(3), С. 1716 - 1745
Опубликована: Янв. 4, 2021
Dynamic
covalent
polymer
networks
(DCPN)
have
historically
attracted
attention
for
their
unique
roles
in
chemical
recycling
and
self-healing,
which
are
both
relevant
sustainable
societal
development.
Efforts
these
directions
intensified
the
past
decade
with
notable
progress
newly
discovered
dynamic
chemistry,
fundamental
material
concepts,
extension
toward
emerging
applications
including
energy
electronic
devices.
Beyond
that,
values
of
DCPN
discovering/designing
functional
properties
not
offered
by
classical
thermoplastic
thermoset
polymers
recently
gained
traction.
In
particular,
bond
exchangeability
has
shown
unparalleled
design
versatility
various
areas
shape-shifting
materials/devices,
artificial
muscles,
microfabrication.
Going
beyond
this
basic
exchangeability,
molecular
mechanisms
to
manipulate
network
topologies
(topological
transformation)
led
opportunities
program
polymers,
concepts
such
as
living
topological
isomerization.
review,
we
provide
an
overview
above
particular
focuses
on
strategies
exploitation
properties.
Based
this,
point
out
remaining
issues
offer
perspectives
how
class
materials
can
shape
future
ways
that
complementary
polymers.
Chemical Science,
Год журнала:
2020,
Номер
11(19), С. 4855 - 4870
Опубликована: Янв. 1, 2020
In
this
minireview,
we
survey
recent
advances
in
the
development
of
vitrimer
materials.
Focus
on
how
to
chemically
control
their
material
properties
is
used
highlight
challenges
for
boosting
potential
emerging
class
polymer
Chemical Reviews,
Год журнала:
2022,
Номер
123(2), С. 701 - 735
Опубликована: Дек. 28, 2022
Self-healing
materials
open
new
prospects
for
more
sustainable
technologies
with
improved
material
performance
and
devices'
longevity.
We
present
an
overview
of
the
recent
developments
in
field
intrinsically
self-healing
polymers,
broad
class
based
mostly
on
polymers
dynamic
covalent
noncovalent
bonds.
describe
current
models
mechanisms
discuss
several
examples
systems
different
types
bonds,
from
various
hydrogen
bonds
to
The
advances
indicate
that
most
intriguing
results
are
obtained
have
combined
These
demonstrate
high
toughness
along
a
relatively
fast
rate.
There
is
clear
trade-off
relationship
between
rate
mechanical
modulus
materials,
we
propose
design
principles
toward
surpassing
this
trade-off.
also
applications
summarize
challenges
field.
This
review
intends
provide
guidance
intrinsic
required
properties.
ACS Central Science,
Год журнала:
2020,
Номер
6(9), С. 1488 - 1496
Опубликована: Июль 29, 2020
Covalent
adaptable
networks
(CANs)
are
covalently
cross-linked
polymers
that
may
be
reshaped
via
cross-linking
and/or
strand
exchange
at
elevated
temperatures.
They
represent
an
exciting
and
rapidly
developing
frontier
in
polymer
science
for
their
potential
as
stimuli-responsive
materials
to
make
traditionally
nonrecyclable
thermosets
more
sustainable.
CANs
whose
cross-links
undergo
associative
intermediates
rather
than
dissociating
separate
reactive
groups
termed
vitrimers.
Vitrimers
were
postulated
attractive
subset
of
CANs,
because
cross-link
mechanisms
maintain
the
original
density
network
throughout
process.
As
a
result,
demonstrate
gradual,
Arrhenius-like
reduction
viscosity
temperatures
while
maintaining
mechanical
integrity.
In
contrast,
reprocessed
by
dissociation
reformation
have
been
exhibit
rapid
decrease
with
increasing
temperature.
Here,
we
survey
stress
relaxation
behavior
all
dissociative
which
variable
temperature
or
data
reported
date.
All
Arrhenius
relationship
between
viscosity,
only
small
percentage
broken
instantaneously
under
typical
reprocessing
conditions.
such,
show
nearly
identical
over
broad
ranges
typically
used
reprocessing.
Given
term
vitrimer
was
coined
highlight
temperature,
analogy
vitreous
glasses,
discourage
its
continued
use
describe
CANs.
The
realization
mechanism
does
not
greatly
influence
practical
most
suggests
chemistries
can
considered
fewer
constraints,
focusing
instead
on
activation
parameters,
synthetic
convenience,
application-specific
considerations.
Chemical Reviews,
Год журнала:
2021,
Номер
121(8), С. 5042 - 5092
Опубликована: Апрель 1, 2021
Polymer
networks
are
complex
systems
consisting
of
molecular
components.
Whereas
the
properties
individual
components
typically
well
understood
by
most
chemists,
translating
that
chemical
insight
into
polymer
themselves
is
limited
statistical
and
poorly
defined
nature
network
structures.
As
a
result,
it
challenging,
if
not
currently
impossible,
to
extrapolate
from
behavior
full
range
performance
entire
network.
therefore
present
an
unrealized,
important,
interdisciplinary
opportunity
exert
molecular-level,
control
on
material
macroscopic
properties.
A
barrier
sophisticated
approaches
techniques
for
characterizing
structure
often
unfamiliar
many
scientists.
Here,
we
critical
overview
current
characterization
available
understand
relation
between
resulting
networks,
in
absence
added
fillers.
We
highlight
methods
characterize
chemistry
molecular-level
strands
junctions,
gelation
process
which
form
network,
dynamics
mechanics
final
material.
The
purpose
serve
as
detailed
manual
conducting
these
measurements
but
rather
unify
underlying
principles,
point
out
remaining
challenges,
provide
concise
chemists
can
plan
strategies
suit
their
research
objectives.
Because
cannot
be
sufficiently
characterized
with
single
method,
strategic
combinations
multiple
required
characterization.
