Materials,
Год журнала:
2024,
Номер
17(23), С. 5966 - 5966
Опубликована: Дек. 5, 2024
The
increasing
adoption
of
distributed
recycling
via
additive
manufacturing
(DRAM)
has
facilitated
the
revalorization
materials
derived
from
waste
streams
for
manufacturing.
Recycled
frequently
contain
impurities
and
mixed
polymers,
which
can
degrade
their
properties
over
multiple
cycles.
This
degradation,
particularly
in
rheological
properties,
limits
applicability
3D
printing.
Consequently,
there
is
a
critical
need
tool
that
enables
rapid
assessment
flowability
these
recycled
materials.
study
presents
design,
development,
an
open-source
melt
flow
index
(MFI)
apparatus.
MFI
was
validated
with
tests
on
virgin
polylactic
acid
pellets,
shredded
poly(ethylene)
terephthalate
glycol
flakes,
high-density
polyethylene/poly(ethylene)
blends
to
demonstrate
range
polymer
types
recyclability.
proposed
offers
user-friendly
cost-effective
solution
evaluating
streams,
thereby
enhancing
viability
applications.
Materials,
Год журнала:
2024,
Номер
17(5), С. 1083 - 1083
Опубликована: Фев. 27, 2024
The
polymer
foil
industry
is
one
of
the
leading
producers
plastic
waste.
development
new
recycling
methods
for
packaging
products
biggest
demands
in
today’s
engineering.
subject
this
research
was
melt
processing
multilayered
PET-based
waste
with
PETG
copolymer.
resulting
blends
were
intended
additive
manufacturing
using
fused
deposition
modeling
(FDM)
method.
In
order
to
improve
properties
developed
materials,
compounding
procedure
conducted
addition
a
reactive
chain
extender
(CE)
and
elastomeric
copolymer
used
as
an
impact
modifier
(IM).
samples
manufactured
3D
printing
technique
and,
comparison,
traditional
injection
molding
obtained
subjected
detailed
characterization
procedure,
including
mechanical
performance
evaluation,
thermal
analysis,
rheological
measurements.
This
confirms
that
film
can
be
successfully
production
filament,
most
samples,
FDM
process
without
any
difficulties.
Unfortunately,
unmodified
are
characterized
by
brittleness,
which
makes
it
necessary
use
elastomer
presence
semicrystalline
PET
phase
improves
resistance
prepared
blends;
however,
annealing
required
purpose.
Virtual and Physical Prototyping,
Год журнала:
2024,
Номер
19(1)
Опубликована: Дек. 9, 2024
As
global
awareness
of
resource
scarcity
and
environmental
concerns
grows,
sustainable
manufacturing
practices
have
become
imperative.
Additive
(AM),
with
its
high
material
efficiency
design
flexibility,
presents
a
promising
pathway
toward
industrial
transformation.
This
review
explores
AM's
role
in
sustainability
across
lifecycle:
for
AM,
after
AM.
In
the
AM
phase,
strategies
such
as
topology
optimisation,
part
consolidation,
cellular
structures
reduce
usage
enhance
durability.
During
in-situ
process
monitoring
closed-loop
control
improve
reliability,
reducing
energy
consumption
failure
rates.
Meanwhile,
adoption
materials—metals,
polymers,
concretes,
biomaterials—further
strengthens
potential
to
advance
sustainability.
After
applications
repair,
remanufacturing,
recycling
extend
product
lifecycles
impact,
aligning
circular
economy
principles.
Future
perspectives
include
integration
artificial
intelligence
in-process
development,
along
regulatory
frameworks
critical
deployment.
Lastly,
emerging
research
trends
advancing
through
are
reviewed.
Overall,
this
provides
roadmap
academia
industry,
offering
insights
maximise
contribution
more
responsible
future.
Sustainability,
Год журнала:
2024,
Номер
16(18), С. 7966 - 7966
Опубликована: Сен. 12, 2024
Additive
Manufacturing
has
significantly
impacted
circular
design,
expanding
the
opportunities
for
designing
new
artifacts
following
economy
principles,
e.g.,
using
secondary
raw
materials.
Small-format
3D
printing
reached
a
broader
audience
of
stakeholders,
including
end-users,
when
dealing
with
filament
feedstocks
from
plastic
and
biomass
waste.
However,
large-format
extrusion-based
additive
manufacturing
recycled
remains
challenging,
resulting
in
limited
applications
awareness
among
practitioners.
This
work
analyzes
most
relevant
product
material
extrusion
plastics
waste
feedstocks.
It
reviews
case
studies
2010
to
mid-2024
materials
academic
research
practical
contexts.
The
were
analyzed
outline
current
situation
trends
plastics-
biomass-based
feedstocks,
focusing
on
materials,
manufacturability,
impact
aesthetics,
application
fields,
products.
Despite
more
consolidated
sectors,
technical
granulate
feedstock
systems,
transportation,
are
emerging.
Academic
distributed
practices
through
printing.
Practitioners
exploiting
different
approaches
design
products,
optimizing
building
times,
costs,
usage
strategies,
strengthening
identity
by
highlighting
circularity.
Spreading
specific
expertise
could
enlarge
range
sectors
as
well
foster
real-world
collaborations
scaling-up.
Thanks
this
work,
synergies
between
contexts
can
be
encouraged
practices,
detecting
exploring
scraps,
categories,
or
processes
future.
Polymers,
Год журнала:
2024,
Номер
16(24), С. 3569 - 3569
Опубликована: Дек. 20, 2024
Additive
manufacturing
is
an
attractive
technology
due
to
its
versatility
in
producing
parts
with
diverse
properties
from
a
single
material.
However,
the
process
often
generates
plastic
waste,
particularly
failed
prints,
making
sustainability
growing
concern.
Recycling
this
waste
material
presents
potential
solution
for
reducing
environmental
impact
while
creating
new,
functional
parts.
In
study,
feasibility
of
printable
filaments
recycled
polylactic
acid
(PLA)
and
virgin
PLA
pellets
was
explored.
Filaments
were
manufactured
lab
using
single-screw
desktop
extruder
four
temperature
zones,
compositions
ranging
100%
10%
composition
increments.
Test
samples
3D
printed
Material
Extrusion
printer
subjected
tensile
testing
conjunction
digital
image
correlation
evaluate
their
ultimate
strength,
yield
Young’s
modulus,
ductility,
toughness,
strain
distribution.
The
results
indicated
that
optimal
mechanical
observed
specimens
made
PLA,
50%
virgin/50%
blend.
Additionally,
comparisons
commercially
produced
filament
revealed
blends
have
50.33%
48%
higher
strength
than
commercial
filament,
respectively.
exhibited
ductility
toughness
lab-made
extruded
filament.
Applied Sciences,
Год журнала:
2025,
Номер
15(2), С. 859 - 859
Опубликована: Янв. 16, 2025
Despite
many
studies,
implementation
of
the
additive
manufacturing
process
in
industrial
and
research
practice
is
limited
due
to
numerous
distortions
affecting
obtained
dependencies
a
degree
that
difficult
predict.
No
uniform
methodology
has
been
developed
for
study
impact
changes
FFF
parameters
on
technological
quality
indicators.
This
paper
presents
description
original
procedure
assessing
using
reference
component.
The
aim
was
analyze
selected
indicators
assessment
products.
To
compare
various
models
produced,
measurements
surface
roughness
as
well
dimensional
shape
accuracy
were
carried
out
stylus
profilometry
coordinate
measurement.
conducted
tests
showed
samples
with
layer
height
0.12
mm
have
most
advantageous
compared
other
heights
0.16
0.20
tested.
All
characterized
by
smaller
dimensions
than
nominal,
indicating
material
shrinkage
occurring
during
process.
negligible
effect
fill
rate
accuracy.
measurement
results
allow
determining
depending
adopted
requirements.
