Macromolecules,
Год журнала:
2022,
Номер
55(10), С. 4056 - 4063
Опубликована: Май 4, 2022
A
well-controlled
piezoelectrically
mediated
reversible
addition–fragmentation
chain-transfer
polymerization
(piezo-RAFT)
was
carried
out
under
ultrasonic
agitation
with
piezoelectric
ZnO
nanoparticles
as
the
mechanochemical
transducer.
The
resulting
polymer
had
high
end-group
fidelity,
low
dispersity,
and
capacity
for
chain
extension.
This
involves
generation
of
alkyl
radical
through
an
electron
transfer
process
from
nanoparticle
to
bromide,
which
also
verified
by
1H
NMR,
liquid
chromatography–mass
spectrometry
(LC-MS),
spin
resonance
(ESR),
density
functional
theory
(DFT)
calculation.
chemistry
further
adopted
in
curing
composite
resins
circumvent
light
penetration
limit
ultraviolet
(UV)
curing.
work
opens
a
new
avenue
shows
good
potential
applications.
Chemical Reviews,
Год журнала:
2022,
Номер
122(6), С. 5476 - 5518
Опубликована: Янв. 4, 2022
Over
the
past
decade,
use
of
photocatalysts
(PCs)
in
controlled
polymerization
has
brought
new
opportunities
sophisticated
macromolecular
synthesis.
However,
selection
PCs
these
systems
been
typically
based
on
laborious
trial-and-error
strategies.
To
tackle
this
limitation,
computer-guided
rational
design
knowledge
structure-property-performance
relationships
emerged.
These
strategies
provide
rapid
and
economic
methodologies
for
tuning
performance
functionality
a
system,
thus
providing
further
polymer
science.
This
review
provides
an
overview
employed
photocontrolled
summarizes
their
progression
from
early
to
current
state-of-the-art.
Background
theories
electronic
transitions
are
also
introduced
establish
perspective
quantum
chemistry.
Typical
examples
each
type
structure-property
then
presented
enlighten
future
polymerization.
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(9), С. 3035 - 3097
Опубликована: Янв. 1, 2023
In
this
review,
we
provide
a
brief
history,
progress,
and
applications,
discuss
the
remaining
challenges
of
photocontrolled
reversible
addition-fragmentation
chain
transfer
(RAFT)
polymerization
(i.e.,
photoinduced
electron/energy
transfer-RAFT
(PET-RAFT),
photoiniferter,
photomediated
cationic
RAFT
polymerization).
Among
these,
visible-light-driven
has
attracted
particular
attention
in
recent
years
due
to
its
benefits,
including
low
energy
consumption
safe
reaction
procedure.
Moreover,
incorporation
visible-light
photocatalysis
conferred
attractive
features,
such
as
spatiotemporal
control
oxygen
tolerance;
however,
clear
understanding
mechanism
not
been
completely
provided.
We
also
present
research
efforts
elucidate
mechanisms
with
aid
quantum
chemical
calculations
combined
experimental
evidence.
This
review
offers
an
insight
into
better
design
systems
for
desired
applications
helps
realize
full
potential
both
academic-
industrial-scale
applications.
Macromolecular Rapid Communications,
Год журнала:
2022,
Номер
43(14)
Опубликована: Май 17, 2022
3D
printing
has
revolutionized
the
way
of
manufacturing
with
a
huge
impact
on
various
fields,
in
particular
biomedicine.
Vat
photopolymerization-based
techniques
such
as
stereolithography
(SLA)
and
digital
light
processing
(DLP)
attract
considerable
attention
owing
to
their
superior
print
resolution,
relatively
high
speed,
low
cost,
flexibility
resin
material
design.
As
one
key
element
SLA/DLP
resin,
photoinitiators
or
photoinitiating
systems
have
experienced
significant
development
recent
years,
parallel
exploration
(macro)monomers.
The
design
new
cannot
only
offer
faster
speed
enable
low-energy
visible
fabrication,
but
also
can
bring
functions
printed
products
even
generate
methods
combination
advanced
optics.
This
review
evaluates
trends
application
for
vat
photopolymerization
printing,
wide
range
small
molecules,
polymers,
nanoassemblies
involved.
Personal
perspectives
current
limitations
future
directions
are
eventually
provided.
Journal of the American Chemical Society,
Год журнала:
2022,
Номер
144(22), С. 9817 - 9826
Опубликована: Май 26, 2022
Photoinduced
atom
transfer
radical
polymerization
(ATRP)
has
been
proved
to
be
a
versatile
technique
for
polymer
network
formation.
However,
the
slow
rates
of
typical
ATRP
limited
its
application
in
field
additive
manufacturing
(3D
printing).
In
this
work,
we
introduced
carbon
quantum
dots
(CQDs)
first
time
aqueous
media
and
developed
an
ultrafast
visible-light-induced
system.
After
optimization,
could
achieve
high
monomer
conversion
(>90%)
within
1
min,
polydispersity
index
(PDI)
was
lower
than
1.25.
This
system
then
applied
as
example
3D
printing
hydrogel
through
digital
light
processing
(DLP),
printed
object
exhibited
good
dimensional
accuracy.
Additionally,
excellent
stable
optical
properties
CQDs
also
provided
interesting
photoluminescence
capabilities
objects.
We
deduce
mediated
process
would
provide
new
platform
preparation
functional
stimuli-responsive
materials.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Ноя. 28, 2023
Abstract
4D
printing
combines
3D
with
nanomaterials
to
create
shape-morphing
materials
that
exhibit
stimuli-responsive
functionalities.
In
this
study,
reversible
addition-fragmentation
chain
transfer
polymerization
agents
grafted
onto
liquid
metal
nanoparticles
are
successfully
employed
in
ultraviolet
light-mediated
stereolithographic
and
near-infrared
light-responsive
printing.
Spherical
directly
prepared
3D-printed
resins
via
a
one-pot
approach,
providing
simple
efficient
strategy
for
fabricating
metal-polymer
composites.
Unlike
rigid
nanoparticles,
the
soft
nature
of
reduces
glass
transition
temperature,
tensile
stress,
modulus
materials.
This
approach
enables
photothermal-induced
composites,
as
demonstrated
by
programmed
shape
memory
composites
rapidly
recovering
their
original
60
s
under
light
irradiation.
work
provides
perspective
on
use
printing,
showcasing
potential
application
field
robots.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Фев. 21, 2024
Abstract
Self-monitoring
materials
have
promising
applications
in
structural
health
monitoring.
However,
developing
organic
afterglow
for
self-monitoring
is
a
highly
intriguing
yet
challenging
task.
Herein,
we
design
two
molecules
with
twisted
donor-acceptor-acceptor’
configuration
and
achieve
dual-emissive
tunable
lifetimes
(86.1–287.7
ms)
by
doping
into
various
matrices.
Based
on
photosensitive
resin,
series
of
complex
structures
are
prepared
using
3D
printing
technology.
They
exhibit
lifetime
Young’s
Modulus
manipulating
the
photocuring
time
humidity
level.
With
sufficient
or
dry
conditions,
long-lived
bright
green
without
apparent
deformation
under
external
loading
realized.
We
demonstrate
that
mechanical
properties
can
be
well
monitored
controlling
humidity,
quantitively
manifested
lifetimes.
This
work
casts
opportunities
constructing
flexible
devices
sensing
real-time
detection.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(42), С. 22664 - 22671
Опубликована: Июль 29, 2021
Abstract
Ultrathin
porphyrinic
2D
MOFs,
ZnTCPP
nanosheets
(TCPP:
5,10,15,20‐(tetra‐4‐carboxyphenyl)
porphyrin)
were
employed
as
heterogeneous
photocatalysts
to
activate
PET‐RAFT
polymerization
under
various
wavelengths
ranging
from
violet
orange
light.
High
rates,
oxygen
tolerance,
and
precise
temporal
control
achieved.
The
polymers
showed
narrow
molecular
weight
distributions
good
chain‐end
fidelity.
applied
in
stereolithographic
3D
printing
an
open‐air
environment
blue
light
yield
well‐defined
printed
objects.
Apart
providing
efficient
catalytic
system,
reinforced
the
mechanical
properties
of
materials.
presence
embedded
materials
conferred
effective
antimicrobial
activity
visible
by
production
singlet
oxygen,
affording
98
%
93
anti‐bacterial
efficiency
against
Gram‐positive
Gram‐negative
bacteria,
respectively.
Advanced Materials,
Год журнала:
2021,
Номер
34(4)
Опубликована: Ноя. 6, 2021
Currently,
there
are
no
straightforward
methods
to
3D
print
materials
with
nanoscale
control
over
morphological
and
functional
properties.
Here,
a
novel
approach
for
the
fabrication
of
controlled
morphologies
using
rapid
commercially
available
Digital
Light
Processing
printing
technique
is
demonstrated.
This
process
exploits
reversible
deactivation
radical
polymerization
in-situ-polymerization-induced
microphase
separation
resins,
which
provides
complex
architectures
controllable
from
macro-
nanoscale,
resulting
in
preparation
enhanced
mechanical
method
does
not
require
specialized
equipment
or
conditions
thus
represents
an
important
development
production
advanced
via
additive
manufacturing.
Nature Communications,
Год журнала:
2021,
Номер
12(1)
Опубликована: Май 17, 2021
Abstract
Photopolymerization-based
three-dimensional
(3D)
printing
can
enable
customized
manufacturing
that
is
difficult
to
achieve
through
other
traditional
means.
Nevertheless,
it
remains
challenging
efficient
3D
due
the
compromise
between
print
speed
and
resolution.
Herein,
we
report
an
approach
based
on
photooxidation
of
ketocoumarin
functions
as
photosensitizer
during
photopolymerization,
which
simultaneously
deliver
high
(5.1
cm
h
−1
)
resolution
(23
μm)
a
common
printer.
Mechanistically,
initiating
radical
deethylated
are
both
generated
upon
visible
light
exposure,
with
former
giving
rise
rapid
photopolymerization
while
latter
ensuring
by
confining
penetration.
By
comparison,
printed
feature
hard
identify
when
encounters
photoreduction
increased
lateral
photopolymerization.
The
proposed
here
provides
viable
solution
towards
additive
controlling
photoreaction
photosensitizers
