ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(7), С. 3894 - 3908
Опубликована: Март 21, 2024
In
the
present
scenario,
petroleum
resource-based
thermoset
materials
have
become
an
environmental
threat
due
to
their
permanent
cross-linked
structure
that
limits
recyclability.
To
overcome
this
problem,
development
of
covalent
adaptable
networks
(CANs)
containing
dynamic
bonds
has
emerged
in
recent
years
can
be
recycled
under
suitable
conditions.
However,
fully
biobased
as
well
recyclable
CANs
following
a
green
synthetic
protocol
is
yet
great
challenge
and
dream
toward
sustainable
environment.
With
goal,
here,
we
report
CAN
films
from
acrylated
castor
oil
(a
low-cost
vegetable
derivative)
cystamine
diamine)
via
catalyst-free
aza-Michael
reaction
using
disulfide
linkage
bond.
The
show
excellent
thermoself-healing
behavior
recyclability
for
at
least
10
cycles
while
maintaining
material
properties.
addition,
catalytically
degraded,
which
further
reprocessed
reconstruct
films.
Furthermore,
are
hydrophobic
nature,
indicating
these
useful
protective
surface
coating
applications.
Therefore,
proof
concept,
demonstrate
anticorrosive
properties
film
having
maximum
water
contact
angle
102.4°,
analyzed
by
polarization
method,
electrochemical
impedance,
salt
spray
fog
test
corrosive
This
work
provides
economical
environmentally
friendly
route
develop
multifunctional
future.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(26), С. 9846 - 9857
Опубликована: Июнь 18, 2023
Tunable
properties
arising
from
variable
topologies
make
polymers
versatile
and
irreplaceable
in
modern
society.
However,
manipulating
the
topology
of
a
specific
polymer
with
determined
composition
remains
big
challenge.
This
study
aimed
to
propose
facile
approach
manipulate
fully
biobased
poly(epoxy
imine)s
(PEIs),
which
were
synthesized
reaction
between
epoxy-derived
trialdehyde
precursors
(ETPs)
decamethylene
diamine
(DDA).
PEIs
varying
branched
structures
covalent
adaptable
networks
(CANs)
permanently
cross-linked
(PCNs)
easily
obtained
by
simply
adjusting
temperature.
At
low
temperature
(T
=
120
°C),
partial
aldehyde-amine
condensation
ETP
DDA
gave
rise
thermoplastic;
at
medium
(120
°C
<
T
≤
160
enhanced
extent
led
CAN
imine
bonds;
high
>
self-cross-linking
bonds
occurred
result
PCN.
With
different
topologies,
showed
mechanical,
physical,
chemical
thus
great
potential
as
alternatives
fossil-derived
various
applications.
Macromolecules,
Год журнала:
2023,
Номер
56(8), С. 3004 - 3014
Опубликована: Апрель 4, 2023
As
one
of
the
first
studied
photothermal
agents,
eumelanin
is
often
used
for
materials
based
on
its
broadband
light
absorption
ability,
biocompatibility,
and
cheap
availability.
However,
it
still
a
challenge
to
conduct
in-depth
development
effect
in
flexible
polymeric
composites
due
dispersion
problem.
Here,
we
report
light-controlled
healable
reversible
adhesive
elastomers
using
polar
liquid
cross-linkers
assist
into
carboxylic
styrene
butadiene
rubber
(XSBR).
The
uniformly
dispersed
coordination
between
Zn2+
bring
elastomer
satisfactory
conversion
efficiency
(80%),
even
if
only
1
phr
added.
Under
near-infrared
(NIR)
laser
irradiation
0.55
W
cm–2,
temperature
with
sharply
increases
from
room
120
∼190
°C
(the
maximum
temperature)
20
90
s,
respectively.
Benefiting
efficient
ability
transesterification,
shows
excellent
NIR
healing
can
reach
94%.
Based
noncovalent
interactions
(mainly
hydrogen
bonds),
temperature-dependent
behavior.
adhesion
strength
be
adjusted
by
changing
or
irradiating
light,
thus
facilitating
disassembly
reuse
elastomers.
Thanks
these
advantages,
obtained
have
potential
applications
harvesting
sunlight
electricity
generation
also
provide
insights
sustainable
materials.
Chemical Communications,
Год журнала:
2022,
Номер
58(89), С. 12399 - 12417
Опубликована: Янв. 1, 2022
Reversible
isocyanate
chemistry
containing
urethane,
thiourethane,
and
urea
bonds
is
valuable
for
designing
dynamic
covalent
polymers
to
achieve
promising
applications
in
recycling,
self-healing,
shape
morphing,
3D
printing,
composites.
