The
steady
increase
in
waste
polycarbonate
(WPC)
necessitates
innovative
recycling
methods,
particularly
closed-loop
recycling,
to
enhance
sustainability.
In
this
research,
an
method
is
introduced
for
converting
WPC
into
a
derivative
comprised
of
multiple
amines,
referred
as
WPC-NH2.
We
then
created
poly(carbonate-imines)
(PCIs)
and
their
carbon
fiber-reinforced
plastics
(CFRPs)
through
condensation
process
involving
WPC-NH2
bifunctional
aldehydes.
These
PCIs
displayed
vitrimer
characteristics
such
stress
relaxation
thermal
reprocessability.
They
also
demonstrated
exceptional
flame-retardant
properties.
Furthermore,
these
supported
acid
hydrolysis
followed
by
neutralization.
Additionally,
the
PCI-based
CFRPs
can
be
degraded
acid,
allowing
recovery
undamaged
fibers.
This
work
signifies
crucial
step
towards
upcycling
WPC,
contributing
broader
goals
environmental
conservation.
ACS Nano,
Год журнала:
2024,
Номер
18(35), С. 24414 - 24425
Опубликована: Авг. 20, 2024
Reckoning
with
the
global
environmental
challenge
of
plastic
pollution,
particularly
in
terms
recycling
and
biodegradation
thermosetting
plastics,
sustainable
alternatives
are
imperative.
The
rapidly
growing
eco-friendly
material
bamboo
has
great
potential
as
a
resource;
however,
it
lacks
inherent
self-bonding
plasticity
characteristics
found
plastics.
This
study
presents
feasible
approach
to
enhance
by
selectively
removing
part
its
lignin
disrupting
crystalline
structure
cellulose.
Concurrently,
this
process
transforms
hydroxyl
groups
into
highly
reactive
dialdehyde
increase
reactivity
bamboo.
resulting
activated
units
undergo
hot-pressing
transform
them
type
(ABTP).
ABTP
is
moldable,
color
can
be
precisely
regulated
adjusting
content.
Additionally,
exhibits
exceptional
solvent
water
resistance,
along
notable
mechanical
properties,
including
tensile
strength
50
MPa,
flexural
80
modulus
5
GPa,
Shore
D
hardness
approaching
90.
Furthermore,
bamboo-derived
reusability
biodegradability,
presenting
environmentally
friendly
conventional
plastics
while
harnessing
development
Polymers,
Год журнала:
2024,
Номер
16(9), С. 1225 - 1225
Опубликована: Апрель 27, 2024
This
study
investigates
the
mechanical
properties
of
coconut
sawdust
powder
combined
with
polypropylene
(PP).
The
effect
compatibility
content,
wood
(WP)
and
injection
molding
parameters
on
composite
(WPC)
is
evaluated.
results
could
be
used
to
figure
out
optimal
such
as
tensile
strength,
elongation,
elastic
modulus,
flexural
strength
by
selecting
suitable
composition.
bonding
between
WP
particles
PP
matrix
good,
uniformly
distributed
across
matrix,
indicated
in
scanning
electron
microscopy
(SEM)
results.
Interestingly,
presence
compatibilizer
oleamide,
increasing
content
from
20
wt.%
40
did
not
result
accumulation
matrix.
Notably,
at
WP,
elongation
highest
(at
7.40
wt.%),
while
30
modulus
reaches
value.
maximum
ultimate
(UTS)
value
obtained
35
WP.
Higher
mostly
greater
shore
D
hardness.
At
WPC
achieves
its
peak
hardness
77.6.
Taguchi
suggest
that
most
critical
factor
UTS
WPCs.
filling
pressure
ranks
second,
followed
packing
pressure.
Finally,
unlike
other
characteristics,
melt
temperature
has
a
minimal
impact
