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.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
Abstract
Nowadays,
much
attention
is
paid
to
the
development
of
high‐performance
and
multifunctional
materials,
but
it
still
a
great
challenge
obtain
polymer
materials
with
high
mechanical
properties,
self‐healing
multifunctionality
in
one.
Herein,
an
innovative
strategy
proposed
satisfactory
waterborne
polyurethane
(PMWPU‐Bx)
by
situ
anchoring
3‐aminophenylboronic
acid
(3‐APBA)
pyrene‐capped
(PMWPU)
via
supramolecular
interactions.
The
multiple
functional
sites
inherent
3‐APBA
can
produce
interactions
groups
on
PMWPU,
promoting
aggregation
hard
domains
network,
which
confers
PMWPU‐Bx
strength
(7.9
MPa)
modulus
(243.2
MPa).
Meanwhile,
dynamic
natures
boronic
ester
bonds
formed
condensation
endow
efficiency.
Additionally,
exhibits
fluorescence
tunability
due
controlled
π–π
stacking.
In
this
research,
molecules
onto
polymers
through
synchronously
achieves
performance
multi‐functionality
polyurethanes,
also
broadens
their
potential
applications
fields
optical
anticounterfeiting
encrypted
information
transmission.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(21), P. 13389 - 13400
Published: Oct. 24, 2024
Waterborne
polyurethane
with
a
combination
of
high
strength,
toughness,
and
self-healing
efficiency
is
attractive
in
many
fields,
but
the
development
such
materials
remains
challenging
due
to
contradictions
these
properties.
In
this
work,
cross-linked
waterborne
(DWPU)
was
successfully
prepared
by
introducing
cross-linking
agent
containing
reversible
disulfide
acylhydrazone
bonds
on
linear
backbone.
The
dual
network
covalent
hydrogen
bonding
improves
stability
provides
excellent
mechanical
properties
for
elastomers,
while
synergistic
action
dynamic
bonds,
imparts
outstanding
performance.
As
result,
DWPU
exhibits
tensile
strength
(49.34
MPa),
exceptional
Young's
modulus
(305.4
satisfactory
toughness
(214.8
MJ
m–3),
rapid
(over
90%).
Thanks
abundant
polar
groups,
presents
tough
adhesion
various
substrates,
as
aluminum,
glass
fiber,
epoxy
resin.
addition,
it
has
good
transparency
inherent
blue
fluorescence.
By
integration
ability
fluorescence
properties,
process
could
be
traced
detecting
change
intensity
crack
positions.
This
study
not
only
simple
way
preparation
high-performance
multifunctional
environmentally
friendly
polymers
also
broadens
their
application
fields
optical
anti-counterfeiting,
protective
coatings,
smart
devices,
so
on.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 13, 2025
ABSTRACT
The
implementation
of
self‐healing
properties
in
waterborne
polyurethane
(WPU)
materials
plays
a
pivotal
role
resource
conservation
and
pollution
mitigation.
In
this
work,
strategy
was
devised
to
balance
the
mechanical
WPU
by
incorporating
bis(hydroxyethyl)
disulfide
(HEDS),
an
aliphatic
disulfide,
as
chain
extender.
synthesized
constructed
dynamic
molecular
network
through
bonds
(SS).
Meanwhile,
physical
cross‐linked
formed
hydrogen
from
carbamate
groups.
synergistic
effect
dual
significantly
contributed
remarkable
capability
WPU.
Specifically,
optimal
sample
(SWPU‐15)
not
only
exhibited
tensile
strength
33.42
MPa
toughness
162.19
MJ/m
3
but
also
achieved
healing
efficiency
81.9%
when
heated
at
80°C
for
4
h.
Profiting
abundant
bonds,
SWPU‐15
could
be
recycled
hot
pressing
or
solvent
treatment,
with
its
remaining
above
20
after
recycling.
This
study
provided
feasible
approach
preparing
environmentally
friendly
excellent
performance
demonstrates
promising
prospects
potential
applications.
Polymer Composites,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 29, 2025
Abstract
Waterborne
polyurethane
(WPU)
is
one
of
the
most
applicable
products
used
in
various
industries
to
manufacture
smart
coatings
with
self‐healing
ability
due
its
being
environmentally
friendly.
However,
self‐healable
WPU
suffer
from
long
healing
times,
low
transparency,
and
poor
physicochemical
properties.
Herein,
ionic
nanocomposite
were
prepared
based
on
SiO
2
‐nanoscale
materials
(SiO
‐NIMs)
novel
WPU,
fast
ability,
high
UV‐blocking
performance.
We
demonstrate
that
‐NIMs
can
significantly
act
as
a
unique
agent
their
fluid
3D‐dynamic
networks
hard
core‐corona
‐SO
3
−
)
soft
segments
(canopy).
The
optical
micrographs
show
film
containing
phr
completely
repaired
after
20
min
at
50°C.
tensile
test
illustrates
elongation
break,
strength,
toughness
values
healed
sample
recovered
78.2%,
94.2%,
69.3%
original
film,
respectively.
differential
scanning
calorimetry,
x‐ray
diffraction,
dynamic
mechanical‐thermal
tests
applied
confirm
core‐corona‐canopy
segments'
hardening
excellent
damping
behavior
matrix.
thermogravimetric
analyses
enhance
thermal
stability
mechanical
properties
WPU.
This
study
introduces
strategy
for
preparing
polymers
outstanding
Highlights
Synthesized
anionic
Congo
red.
Introducing
strategy‐based
coatings.
Enhancement
thermo‐mechanical
healable
abilities
coating.
