Journal of Macromolecular Science Part A,
Journal Year:
2024,
Volume and Issue:
61(11), P. 911 - 921
Published: Oct. 16, 2024
Stiff
structures
are
generally
considered
detrimental
to
the
materials'
self-healing
efficiency
because
of
rigid
conformation
and
restricted
motion
molecular
chains.
However,
in
this
study,
an
unexpected
acceleration
was
observed
a
urethane
network
when
lignosulfonate,
bio-based
stiff
structure
with
benzene
rings,
introduced
into
polyurethane
matrix.
An
extraordinary
increase
mechanical
properties
achieved
just
3
wt%
lignosulfonate
added
pristine
sample,
including
strength
from
16.24
MPa
42.89
elongation
at
break
390%
602%.
Importantly,
significant
enhancement
accompanied
by
notable
healing
time
efficiency,
which
increased
up
44%
compared
sample.
This
unique
behavior
can
be
attributed
mediation
on
ionic
bonds
between
segment,
as
well
hydrogen
formed
within
segments.
ensures
ultra-high
without
compromising
capacity
opens
way
for
accelerating
elastomers
through
readily
available
biomass-derived
material.
In
addition,
addition
lignosulfonates
gives
elastomer
some
Anti-UV
performance.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(38), P. 26158 - 26169
Published: Jan. 1, 2024
Elastomers
with
the
strongest
mechanical
properties
within
2
h
of
room-temperature
self-healing
were
prepared
based
on
a
multi-type
H-bond
assembly,
resolving
conflict
between
rapid
ability
and
excellent
strength
in
PUs.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 12, 2025
ABSTRACT
Self‐healing
polyurethane
elastomers
with
dynamic
crosslinking
networks
are
promising
candidates
for
intelligent
next‐generation
coatings.
However,
their
constitutive
relation
shows
conflicts
between
high
mechanical
performance
and
room‐temperature
self‐healing,
as
well
recyclability.
Here,
a
regulation
strategy
of
triple‐crosslinked
network
in
the
hard
domain
was
proposed
to
achieve
multifunction
enhancement
via
covalent
borate
ester
bonds
coupling
noncovalent.
The
distribution
ratio
bonds,
boron‐nitrogen
coordination
multiple
hydrogen
were
meticulously
designed
balance
fracture
reconstruction
molecular
network.
introduced
enabled
basic
self‐healing
through
molecule‐level
topological
evolution.
abundant
provided
external
noncovalent
reversible
networks,
thus
improving
tensile
strength
toughness
physical
points.
obtained
exhibited
impressive
light
transmittance
93%,
41.07
MPa,
elongation
at
break
1673.20%,
166.74
MJ
m
−3
,
almost
entirely
48
h.
These
even
maintained
90%
original
properties
after
suffering
three
recycles.
This
may
promote
practical
application
coatings
automobile
flexible
electronic
industry.
