Polymer Composites,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 11, 2024
Abstract
Herein,
an
efficient
and
rapid
one‐step
approach
to
construct
CS@Ag
nanohybrids
through
in‐situ
reduction
of
AgNO
3
with
L‐ascorbic
acid
using
chitosan
(CS)
as
carrier
only
at
room
temperature
was
presented.
Novel
polyurethane/CS@Ag
composite
films
remarkable
properties
were
fabricated
via
the
reaction
nanohybrid
antibacterial
reinforcing
agent
bis(2‐hydroxyethyl)
terephthalate
(BHET)‐based
polyurethane.
With
increase
content,
rate
for
polyurethane
against
Staphylococcus
aureus
Escherichia
coli
increases.
The
20
phr
S.
is
85.5%,
that
containing
30
E.
94.9%.
Thereby,
synergistic
effect
CS
Ag
can
effectively
improve
Meanwhile,
bond
strength
tensile
are
up
8.72
MPa
(improved
by
74.3%)
20.1
(enhanced
130.5%),
respectively.
Indeed,
this
work
may
unlock
new
possibilities
developing
enhanced
polyurethanes,
which
expected
applied
in
medical
devices,
food
packaging,
automotive
industries.
Highlights
efficiently
a
approach.
BHET
used
novel
chain
extender
PU.
able
fully
exert
Ag.
endows
PU
high
excellent
antimicrobial
properties.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 16, 2024
Abstract
Advancing
the
development
of
eco‐friendly
waterborne
polyurethane
elastomers
(WPUEs)
can
significantly
reduce
reliance
on
organic
solvents,
which
is
crucial
for
environmental
conservation.
Nevertheless,
achieving
superior
mechanical
properties
and
self‐healing
capabilities
in
WPUEs
presents
a
considerable
challenge.
Drawing
inspiration
from
hierarchical
dynamic
structures
observed
scallop
byssal
threads,
high‐strength
supramolecular
elastomer
(SWPUE),
designated
SWPU‐DESH‐Zn,
developed
this
study.
Owing
to
precise
regulation
hydrogen
bonding
state
acylsemicarbazide
(ASC)
fragments
via
disulfide
bonds,
formation
coordination
interactions
between
carboxyl
zinc
ions,
as‐prepared
exhibited
robust
strength
52.07
MPa,
comparable
that
solvent‐based
elastomers.
Additionally,
it
notable
capability
excellent
reprocessability.
Meanwhile,
high‐performance
ionic
skins
electromagnetic
interference
(EMI)
shielding
materials
are
also
fabricated
using
SWPU‐DESH‐Zn
as
matrix,
further
illustrating
its
potential
applications.
This
novel
biomimetic
approach,
inspired
by
offers
valuable
insights
designing
healable
polymers
with
enhanced
properties.
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 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.
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 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.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 31, 2025
Abstract
Although
healable
waterborne
polymers
have
attracted
significant
attention
in
recent
years
due
to
their
environmentally
friendly
properties,
the
inferior
mechanical
properties
still
hinder
further
propagation.
Inspired
by
micro‐structure
of
pangolin
scales,
herein,
a
novel
supramolecular
polymer
network
(SWPN)
named
SWPUMA‐SPPEK10
is
proposed
this
study.
This
fabricated
complexing
sulfonated
poly(phthalazinone
ether
ketone)
(SPPEK)
with
acylsemicarbazide
(ASC)
containing
cationic
polyurethane
(SWPUMA)
an
aqueous
solution
followed
hot‐pressing
process.
Due
synergistic
effects
ASC,
electrostatic
interactions,
and
SPPEK
nanoparticles,
exhibited
remarkable
tensile
strength
55.19
MPa,
toughness
305.93
MJ
m
−3
.
The
rich
dynamic
interactions
within
chains
also
imparted
it
excellent
healability
recyclability.
biomimetic
structural
design
provides
new
insight
for
constructing
high‐performance
robust
recyclability,
which
may
play
critical
role
mitigating
global
environmental
pollution.
