ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(46), P. 16834 - 16846
Published: Nov. 2, 2024
The
development
of
environmentally
friendly
WPUs
with
sustainable
biobased
feedstock,
repairability,
recyclability,
and
multifunctionality
is
highly
attractive
desirable.
Herein,
a
vanillin-based
polyol
(VP)
containing
dynamic
Schiff
base
bonds
was
synthesized
via
one-step
reaction.
rigid
VP
combined
flexible
castor
oil,
acting
as
polyols,
to
produce
waterborne
polyurethanes
(BWPU).
obtained
BWPU
material
simultaneously
possessed
tunable
mechanical
properties
(tensile
strength
up
11.49
MPa,
elongation
at
break
reached
169.04%),
high
thermal
stability
(T5
>
240
°C),
self-healing
(20
min
150
remolding
(3
h
chemical
degradation
(1
mol/L
HCl
solution),
demonstrating
excellent
in-service
performance
an
closed-loop
recycling
feature.
Interestingly,
the
exhibited
obvious
fluorescent
properties,
which
can
be
used
ink
for
information
security.
Furthermore,
by
incorporating
conductive
Ag
nanowires,
potential
application
wearable
sensors
explored,
prepared
AgNW/BWPU
pressure
sensitive
sensing
ability
quick
responsiveness
(100
ms),
monitor
both
subtle
movements
large
human
movements.
This
work
provides
strategy
achieving
repairable
recyclable
fluorescence
properties.
Macromolecules,
Journal Year:
2023,
Volume and Issue:
56(23), P. 9766 - 9777
Published: Nov. 29, 2023
With
environmental
concerns
increasing,
the
development
of
durable,
degradable,
and
reprocessable
elastomers
is
crucial
for
advancement
environmentally
friendly
wearable
electronics.
Herein,
self-healing,
polyimine
with
a
cross-linked
network
constructed
by
dynamic
imine
bonds
were
synthesized
under
room
temperature
flexible
strain
sensor.
Owing
to
formation
microphase
separation
structure
polyetheramine
as
soft
segments
adipic
acid
dihydrazide
hard
segments,
obtained
elastomer
exhibited
superior
mechanical
properties
elongation
at
break
1158%
tensile
strength
2.51
MPa.
Moreover,
endowed
outstanding
self-healing
capability
reprocessability.
The
healing
efficiency
reached
96.0%
after
24
h,
reprocessed
maintained
80.6%
original
three
reprocessing
cycles.
In
addition,
was
able
completely
degrade
into
monomers
acidic
condition
within
180
min.
elastomer-based
sensor
liquid
metal
conductive
material
processed
excellent
recovery
ability
sensing
performance
even
being
cut
two
halves.
findings
in
this
work
conceivably
stand
out
new
methodology
preparation
functional
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
unknown
Published: June 29, 2023
Abstract
Polyimides
(PIs)
used
in
advanced
electrical
and
electronic
devices
can
be
electrically/mechanically
damaged,
resulting
a
significant
waste
of
resources.
Closed‐loop
chemical
recycling
may
prolong
the
service
life
synthetic
polymers.
However,
design
dynamic
covalent
bonds
for
preparing
chemically
recyclable
crosslinked
PIs
remains
challenging
task.
Herein,
new
PI
films
containing
oligomer,
chain
extender,
crosslinker
are
reported.
They
exhibit
superior
recyclability
excellent
self‐healable
ability
owing
to
synergistic
effect
extender
crosslinker.
The
produced
completely
depolymerized
an
acidic
solution
at
ambient
temperature,
leading
efficient
monomer
recovery.
recovered
monomers
remanufacture
without
deteriorating
their
original
performance.
In
particular,
designed
serve
as
corona‐resistant
with
recovery
rate
approximately
100%.
Furthermore,
carbon
fiber
reinforced
composites
(CFRCs)
matrices
suitable
harsh
environments
recycled
multiple
times
non‐destructive
up
preparation
high‐strength
adaptable
hybrid
from
simple
oligomers,
extenders,
crosslinkers
provide
solid
basis
sustainable
development
fields.
Journal of Composites Science,
Journal Year:
2023,
Volume and Issue:
7(4), P. 148 - 148
Published: April 7, 2023
Self-healing
polymers
and
nanocomposites
form
an
important
class
of
responsive
materials.
These
materials
have
the
capability
to
reversibly
heal
their
damage.
For
aerospace
applications,
thermosets
thermoplastic
been
reinforced
with
nanocarbon
nanoparticles
for
self-healing
structural
This
review
comprehends
use
in
sector.
The
behavior
depends
on
factors
such
as
microphase
separation,
matrix–nanofiller
interactions
inter-diffusion
polymer–nanofiller.
Moreover,
can
be
achieved
through
healing
agents
nanocapsules
nanoparticles.
mechanism
has
found
operate
via
physical
or
chemical
interactions.
used
design
components,
panels,
laminates,
membranes,
coatings,
etc.,
recover
damage
space
Future
research
must
emphasize
new
high-performance
polymeric
structures.
Macromolecules,
Journal Year:
2023,
Volume and Issue:
56(17), P. 6633 - 6643
Published: Aug. 25, 2023
Chemically
recyclable
thermosets
are
an
ideal
substitute
for
traditional
in
the
development
of
a
circular
economy
and
sustainable
environment.
However,
efficient
easy-to-achieve
chemical
recycling
strategies
remains
challenging.
Herein,
series
supramolecular
that
can
be
chemically
recycled
under
mild
acid
conditions
at
room
temperature
fabricated
by
cross-linking
polyimine
polymers
with
dynamic
boroxines
(PIx-Boroxine).
By
tailoring
molar
content
boroxines,
PI1.2-boroxine
exhibit
tensile
strength
∼30.6
MPa,
yield
33.0
elongation
break
∼111.6%,
Young's
modulus
∼679.6
MPa.
Because
nature
imine
bonds,
PIx-boroxine
thermoset
exhibits
fast
stress
relaxation
behavior,
which
enables
them
to
have
good
reprocessing
ability.
These
unique
features
also
guarantee
high-performance
reusable
hot-melt
adhesive.
The
maximum
lap
shear
PIx-Boroxine-based
adhesives
stainless
steel
bonding
adhesive
reach
∼18.6
is
comparable
commercial
adhesives.
Meanwhile,
reused
least
10
times
only
small
amount
reduction
strength.
More
importantly,
easily
depolymerized
0.1
M
HCl/H2O
solution
temperature.
Further,
monomers
efficiently
separated
simple
separation
procedure.
recovered
fabricate
new
without
losing
their
mechanical
properties.
This
work
provides
design
strategy
develop
recyclability,
will
contribute
modern
society.
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
26(9), P. 5519 - 5530
Published: Jan. 1, 2024
High
biomass
content,
anti-flammable
and
degradable
epoxy
thermosets
were
prepared
by
curing
a
tyramine-derived
monomer
(TVEP)
with
furan-derived
diamine
(DFDA)
for
non-destructively
recyclable
carbon
fiber
composite
application.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(8), P. 4778 - 4788
Published: April 12, 2024
Smart
materials
with
outstanding
self-healing
and
reprocessable
capabilities
are
highly
desirable
for
next-generation
coatings
that
can
repair
damaged
in
a
timely
autonomous
manner.
However,
their
prevalent
use
practical
applications
is
currently
hindered
by
various
limitations,
such
as
low
mechanical
strength,
long
healing
time,
expensive
raw
materials.
Herein,
we
prepared
epoxy
resin
coating
(EP-SS-DAAX)
excellent
properties
incorporating
dynamic
disulfide
bonds
flexible
chains
into
the
network.
The
presence
of
promoted
mobility
molecular
exchange
bonds,
resulting
efficient
high
toughness
coating.
EP-SS-DAA2
obtained
tensile
strength
33.30
MPa
breaking
elongation
150.55%
after
1
h
on
basis
achieving
efficiency
(93.68%)
be
reprocessed
through
hot-pressing
recovery
rate
107.03%.
As
proof
concept,
healed
demonstrated
anticorrosive
effects
being
immersed
3.5
wt
%
NaCl
aqueous
solution
7
days.
This
study
provides
feasible
approach
to
obtaining
high-performance
resins
have
extraordinary
integrated
performance.
