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
Synthesis and Functional Evaluation of PCL‐SS Self‐Healing Polyurethanes With NIR‐Responsive Behavior
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 28, 2025
ABSTRACT
Self‐healing
shape
memory
polyurethanes
(SHSMPUs)
integrate
recovery
and
damage
restoration,
offering
enhanced
reliability
adaptability
for
biological
applications.
In
this
study,
PCL‐SS
SHSMPUs
are
synthesized
using
polycaprolactone
(PCL)
as
the
soft
segment
hexamethylene
diisocyanate
(HDI)
2‐hydroxyethyl
disulfide
(HEDS)
hard
segment.
Increasing
content
enhances
tensile
strength
but
reduces
elongation
at
break,
with
PCL‐SS3
showing
highest
(14.9
MPa)
PCL‐SS1
achieving
greatest
break
(1120.7%).
All
exhibit
a
fixation
rate
above
90%,
PCL‐SS2
achieves
of
74%.
The
self‐healing
properties
studied
under
varying
time,
temperature,
content,
revealing
that
healing
efficiency
97.6%
after
12
h
90°C.
Furthermore,
multi‐walled
carbon
nanotubes
(MWCNTs)
introduced
to
develop
polyurethane
composites
near‐infrared
(NIR)
light‐induced
functionality.
5%
MWCNTs
achieve
85.5%
within
1
min
NIR
irradiation.
However,
excessive
mechanical
due
poor
dispersion.
This
study
offers
basis
optimizing
designing
applications
in
biomedical
devices
smart
materials.
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