Multifunctional waterborne polyurethane-cellulose nanofiber composite: Realizing ultrarobust, photoluminescence and swift self-healing via multi-dynamic bonding
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 160302 - 160302
Опубликована: Фев. 1, 2025
Язык: Английский
Self-healing waterborne polyurethane originated from waste PET and their composites with polypyrrole for stretchable strain sensor
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 161515 - 161515
Опубликована: Март 1, 2025
Язык: Английский
Colorless and transparent self-healing polyurethane urea with superior tensile strength for protective coating
European Polymer Journal,
Год журнала:
2025,
Номер
unknown, С. 113827 - 113827
Опубликована: Фев. 1, 2025
Язык: Английский
Effect of Disulfide Bond Density on the Properties of Polyurethane/Epoxy Interpenetrating Networks
Materials,
Год журнала:
2025,
Номер
18(7), С. 1636 - 1636
Опубликована: Апрель 3, 2025
Interpenetrating
polymer
networks
(IPNs)
are
widely
used
as
damping
materials
across
various
industries.
However,
they
susceptible
to
issues
such
microcracking
or
fracture
over
long-term
service
periods.
To
address
these
challenges
and
improve
the
performance
of
IPNs,
this
research
focused
on
designing
synthesizing
self-healing
polyurethane
(PU)/epoxy
(EP)
interpenetrating
(PU/EP-IPNs)
enhanced
with
dynamic
disulfide
bonds.
The
incorporation
bonds
significantly
properties
materials.
shape
memory
was
evaluated,
demonstrating
high
fixation
rates
up
95.0%
exceptional
recovery
99.7%.
These
results
indicate
materials’
ability
revert
their
original
upon
heating
above
glass
transition
temperature
(Tg).
In
addition,
effective
range
material
reached
61.4
°C,
loss
factor
0.859.
This
indicates
that
enhancement
is
closely
related
increase
in
bond
density.
formation
IPN
between
PU
EP
also
contributed
improved
mechanical
thermomechanical
properties.
PU/EP-IPNs
exhibit
significant
potential
innovative
capabilities.
Язык: Английский
Unexpected self-healing acceleration within urethane networks: lignosulfonate mediation of ionic and hydrogen bonds for ultra-strong recyclable elastomers
Journal of Macromolecular Science Part A,
Год журнала:
2024,
Номер
61(11), С. 911 - 921
Опубликована: Окт. 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.
Язык: Английский