The
increasing
amount
of
nondegradable
petroleum-based
plastic
waste
releases
chemical
hazards,
posing
a
significant
threat
to
the
environment
and
human
health.
Chitosan,
derived
from
marine
wastes,
is
an
attractive
feedstock
for
preparation
replacement
due
its
renewable
degradable
nature.
However,
in
most
cases,
complex
modifications
chitosan
or
hybridization
with
chemicals
fossil
resources
are
required.
Herein,
we
present
high-performance
chitosan-based
polyimine
vitrimer
(CS-PI)
through
mild
catalyst-free
Schiff
base
reaction
between
vanillin.
CS-PI
were
formed
by
integrating
dynamic
imine
bonds
into
polymer
networks,
resulting
superior
thermo-processability
mechanical
performances.
tensile
strength
Young’s
modulus
films
reached
38.72
MPa
3.22
GPa,
respectively,
which
was
significantly
higher
than
that
both
commercial
plastics
bioplastics.
Additionally,
exhibited
good
light
transmittance,
self-healing
ability,
reprocess
capacity,
water
resistance,
durability
various
organic
solvents.
Moreover,
could
be
completely
degraded
under
acidic
natural
conditions,
enabling
sustainable
circulation.
Therefore,
this
work
offers
new
design
strategy
developing
all-natural
environmentally
friendly
polymers
as
replacements
plastics,
thus
reducing
accumulation
waste.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 6, 2025
Achieving
high
flexibility,
breathability,
and
sensitivity
in
inorganic
semiconductor
gas
sensors
remains
a
substantial
challenge,
especially
for
wearable
applications
high-humidity
environments.
This
study
develops
hyper-flexible,
thermally
stable,
highly
breathable
full-inorganic,
self-supporting
In2–xGaxO3–Al2O3/Al2O3
nanofiber
membrane
sensor,
fabricated
using
dual-spinneret
electrospinning
method
with
an
interlocking
design.
innovative
sensor
has
bilayer
structure
amorphous
Al2O3
substrate
layer
supporting
active
of
high-aspect-ratio
interwoven
In2–xGaxO3
nanofibers,
providing
outstanding
elevated
strong
thermal
stability.
Owing
to
low-concentration
Ga3+
doping
its
nanofiber-built
porous
design,
the
In1.98Ga0.02O3–Al2O3/Al2O3
demonstrates
excellent
sensitivity,
selectivity,
cycling
stability
detecting
ultralow-concentration
NO
biomarker
(≈15
ppb)
under
simulated
breath
conditions,
without
performance
deterioration,
even
after
10000
large-angle
bending
cycles.
work
advances
universal
fabrication
high-performance,
full-inorganic
breath-based
diagnostic
applications.
Polymer Engineering and Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 31, 2025
Abstract
Vitrimers
are
developed
as
a
further
step
towards
improving
sustainable
networked
polymers
which
can
be
reprocessed
while
having
crosslinks
at
the
same
time.
However,
several
competing
factors
jeopardize
and
actually
manipulate
claimed
benefits
of
crosslinking.
This
review
discusses
different
enhanced
properties
including
chemical,
rheological,
mechanical
that
reported
in
literature.
In
addition,
it
presents
opposite
non‐common
resulted
from
Moreover,
reprocessing
healing
methods
efficiencies
discussed.
Highlights
After
crosslinking,
may
result
better
or
worse
properties.
Recyclability
Healability
provide
crosslinked
polymers.
offer
welding
for
incompatible
Vitrimers
are
a
class
of
advanced
polymeric
materials
characterized
by
their
dynamic
covalent
networks,
which
offer
unique
properties
such
as
self-healing,
reprocessability,
and
shape
memory.
The
integration
vitrimers
into
3D
printing
technologies
presents
significant
advancement
in
the
field
additive
manufacturing,
offering
numerous
benefits
over
traditional
thermoplastics
thermosets.
use
printing,
leverages
ability
to
be
cured
reformed
under
specific
conditions,
exposure
light
or
heat.
enable
production
high-resolution
parts
that
can
easily
repaired
recycled,
addressing
key
environmental
concerns
associated
with
polymers.
Their
nature
not
only
extends
life
printed
components
but
also
reduces
waste
promotes
sustainability
enabling
recycling
materials.
Recent
developments
for
have
focused
on
optimizing
performance,
including
enhancing
mechanical
strength,
expanding
range
printable
materials,
improving
efficiency
process.
Studies
demonstrated
achieve
impressive
high
tensile
elasticity,
thermal
stability,
making
them
suitable
various
applications.
continued
research
development
hold
promise
advancing
capabilities
providing
pathway
more
sustainable
versatile
By
harnessing
vitrimers,
industry
push
boundaries
what
is
possible
material
design
functionality,
leading
innovative
solutions
complex
engineering
challenges.
This
article
provides
comprehensive
review
reported
literature
explores
potential
techniques.
It
offers
detailed
insight
present
trends
field.
Polymers,
Journal Year:
2025,
Volume and Issue:
17(5), P. 571 - 571
Published: Feb. 21, 2025
Conventional
epoxy
thermosets,
with
irreversible
crosslinking
networks,
cannot
be
reprocessed
and
recycled.
Furthermore,
the
utilization
of
petroleum-based
materials
accelerates
depletion
non-renewable
resources.
The
introduction
dynamic
covalent
bonds
use
bio-based
for
thermosets
can
effectively
address
above
issues.
Herein,
a
series
vitrimers
imine
were
synthesized
via
simple
solvent-free,
one-pot
method
using
vanillin-derived
aldehyde
monomers,
4,4-diaminodiphenylsulfone
(DDS)
bisphenol
F
diglycidyl
ether
(BFDGE)
as
raw
materials.
effect
density,
structure
bond
content
on
resulting
was
studied,
demonstrating
their
excellent
thermal
properties,
UV
shielding
solvent
resistance,
well
outstanding
mechanical
properties
compared
to
those
previously
reported
vitrimers.
In
particular,
cured
neat
resin
vitrimer
had
maximum
tensile
strength
109
MPa
Young’s
modulus
6257
MPa,
which
are
higher
than
imine-based
endow
these
good
reprocessability
upon
heating
(over
70%
recovery)
degradation
under
acidic
conditions,
enabling
recycling
by
physical
routes
gentle
chemical
routes.
This
study
demonstrates
effective
process
prepare
high-performance
recycled
thermosets.
