Engineering Reports,
Год журнала:
2025,
Номер
7(4)
Опубликована: Апрель 1, 2025
ABSTRACT
Plastic
pollution
has
emerged
as
a
significant
global
issue,
highlighting
the
need
for
sustainable
alternatives
and
effective
recycling
methods.
Concurrently,
cactus
plant
offers
promising
source
of
bio‐based
materials,
particularly
due
to
its
resilience
in
harsh
environments.
This
study
focused
on
performance
characterization
powder
mixed
with
recycled
high‐density
polyethylene
(rHDPE)
pellets
filament
production
suitable
3D
printing
using
Fused
Filament
Fabrication
method.
The
physical
properties
both
rHDPE
were
investigated,
composite
filaments
prepared
from
5%,
10%,
15%
alongside
rHDPE.
Performance
evaluation
was
conducted
Universal
Testing
Machine.
Additionally,
chemical
composition
analyzed,
particle
size
distribution
determined.
combination
HDPE
yielded
viable
filament,
though
increasing
proportions
reduced
extrusion
properties.
tensile
strength
pure
measured
at
16.27
MPa,
while
strengths
5%
10%
composites
14.97
10.74
respectively.
For
printed
specimens,
recorded
13.04
MPa
8.28
composite.
flexural
results
showed
21.77
15.64
These
findings
suggest
that
can
serve
valuable
additive
developing
materials.
Polymers,
Год журнала:
2024,
Номер
16(11), С. 1562 - 1562
Опубликована: Май 31, 2024
Fused
Deposition
Modelling
(FDM)
is
one
of
the
layer-based
technologies
that
fall
under
umbrella
term
“Additive
Manufacturing”,
where
desired
part
created
through
successive
layer-by-layer
addition
process
with
high
accuracy
using
computer-aided
design
data.
Additive
manufacturing
technology,
or
as
it
commonly
known,
3D
(three-dimensional)
printing,
a
rapidly
growing
sector
incorporated
in
automotive,
aerospace,
biomedical,
and
many
other
fields.
This
work
explores
impact
Manufacturing
on
mechanical
proprieties
fabricated
part.
To
conduct
this
study,
printed
tensile
specimens
are
designed
according
to
ASTM
D638
standards
from
digital
template
file
FDM
printer
Raise3D
N2.
The
material
chosen
for
printing
parameter
optimization
Polylactic
acid
(PLA).
parameters
were
studied
infill
pattern,
density,
cell
orientation.
These
factors’
effects
behavior
parts
analyzed
by
experiments
method,
statistical
software
MINITAB2020.
Polymers,
Год журнала:
2025,
Номер
17(3), С. 426 - 426
Опубликована: Фев. 6, 2025
Additive
manufacturing
(AM)
techniques
make
fabricating
complex
designs,
prototypes,
and
end-user
products
possible.
Conductive
polymer
composites
find
applications
in
flexible
electronics,
sensor
fabrication,
electrical
circuits.
In
this
study,
thermoplastic
polyurethane
(TPU)-based
conductive
composite
samples
were
fabricated
via
fused
filament
fabrication
(FFF).
The
effects
of
three
important
process
parameters,
including
infill
density
(ID),
layer
thickness
(LT),
fan
speed
(FS),
on
various
mechanical
properties
(tensile
compressive
properties)
investigated.
It
was
observed
that
all
the
considered
parameters
affect
properties,
they
are
significant
as
per
analysis
variance
(ANOVA).
From
scanning
electron
microscopy
(SEM)
optical
microscopy,
combinations
such
low
ID,
high
LT,
FS
resulted
formation
defects
voids,
cracks,
warping,
which
properties.
Finally,
parameter
optimization
performed,
resulting
a
with
best
possible
combination
at
medium
FS.
Polymers,
Год журнала:
2024,
Номер
16(23), С. 3268 - 3268
Опубликована: Ноя. 24, 2024
Increasing
environmental
concerns
and
the
need
for
sustainable
materials
have
driven
a
focus
towards
utilization
of
recycled
polylactic
acid
(PLA)
in
additive
manufacturing
as
PLA
offers
advantages
over
other
thermoplastics,
including
biodegradability,
ease
processing,
lower
impact
during
production.
This
study
explores
optimization
mechanical
properties
parts
through
combination
experimental
machine
learning
approaches.
A
series
experiments
were
conducted
to
investigate
various
processing
parameters,
such
layer
thickness
infill
density,
well
annealing
conditions,
on
parts.
Machine
algorithms
proven
possibility
predict
tensile
behavior
with
an
average
error
6.059%.
The
results
demonstrate
that
specific
combinations
parameters
post-treatment
differently
improve
(with
7.31%
ultimate
strength
(UTS),
0.28%
Young's
modulus,
3.68%
elongation)
crystallinity
22.33%)
according
XRD
analysis,
making
it
viable
alternative
virgin
applications
packaging
solutions,
biodegradable
containers,
clamshell
packaging,
protective
inserts.
optimized
exhibited
levels
comparable
those
their
counterparts,
highlighting
potential
reducing
saving
costs.
For
both
as-built
annealed
samples,
optimal
settings
achieving
high
composite
desirability
involved
0.2
mm
thickness,
75%
samples
100%
samples.
provides
comprehensive
framework
optimizing
manufacturing,
contributing
advancement
material
engineering
circular
economy.
Polymers,
Год журнала:
2024,
Номер
16(13), С. 1927 - 1927
Опубликована: Июль 6, 2024
Increasing
recycled
plastic
content
in
cars
to
25%
by
2030
is
one
of
the
key
measures
for
decarbonizing
automotive
industry
defined
European
Commission.
This
should
include
recovery
plastics
from
end-of-life
vehicles
(ELVs),
but
such
materials
are
hardly
used
compounds
today.
To
close
knowledge
gap,
two
ELV
recyclate
grades
largely
based
on
bumper
recycling
were
analyzed
comparison
a
packaging-based
post-consumer
(PCR).
The
composition
data
design
polypropylene
(PP)
applications
with
virgin
base
material
and
mineral
reinforcement,
which
characterized
relation
commercial
virgin-based
compound.
A
compound
40
wt.-%
ELV-based
can
exceed
just
25
terms
stiffness/impact
balance.
While
reference
nearly
be
matched
regarding
mechanics,
flowability
not
reached
any
PCR
compounds,
making
further
development
work
necessary.
Polymers,
Год журнала:
2024,
Номер
16(15), С. 2228 - 2228
Опубликована: Авг. 5, 2024
This
study
investigates
the
impact
of
infill
density
on
mechanical
properties
fused
deposition
modeling
(FDM)
3D-printed
polylactic
acid
(PLA)
and
PLA
reinforced
with
carbon
fiber
(PLA+CF)
specimens,
which
hold
industrial
significance
due
to
their
applications
in
industries
where
robustness
durability
are
critical.
Exposure
cooling
lubricants
is
particularly
relevant
for
environments
these
materials
frequently
subjected
fluids,
such
as
manufacturing
plants
machine
shops.
research
aims
explore
insights
into
under
realistic
operating
conditions,
including
prolonged
exposure
lubricants.
Tensile
tests
were
performed
PLA+CF
specimens
printed
varying
densities
(40%,
60%,
80%,
100%).
The
underwent
tensile
testing
before
after
7
30
days,
respectively.
Mechanical
strength,
maximum
force,
strain,
Young’s
modulus
measured
evaluate
effects
lubricant
exposure.
Higher
significantly
increased
strength
force
both
specimens.
showed
an
increase
from
22.49
MPa
at
40%
45.00
100%
density,
representing
a
100.09%
enhancement.
exhibited
23.09
42.54
MPa,
marking
84.27%
improvement.
After
days
exposure,
decreased
by
15.56%,
while
experienced
18.60%
reduction.
Strain
values
minor
fluctuations,
indicating
stable
elasticity,
improved
higher
densities,
suggesting
enhanced
material
stiffness.
Increasing
FDM
enhance
properties,
even
These
findings
have
significant
implications
applications,
that
optimizing
can
performance
components.
offers
robust
foundation
further
practical
highlighting
critical
role
enhancing
structural
integrity
load-bearing
capacity.
Composites and Advanced Materials,
Год журнала:
2025,
Номер
34
Опубликована: Янв. 8, 2025
Numerous
studies
have
investigated
polymeric
composites
fabricated
using
fused
deposition
modelling.
However,
the
mechanical
performance
of
these
composites,
which
is
influenced
by
various
factors,
including
materials
and
printing
parameters,
remains
unknown.
Further
understanding
factors
helps
improve
accuracy
predictions.
Therefore,
this
study
fabricates
in-house
polyamide
reinforced
with
carbon
fibre
at
a
composition
20
wt.%
controls
its
layer
height
orientations.
Results
indicated
that
controlling
orientation
0°
angle
are
most
crucial
factor
compared
to
height,
leads
maximum
flexural
strength
∼21
MPa
due
improvements
in
load-bearing
capacity
adhesion
bonding
between
matrix.
Clean Technologies and Recycling,
Год журнала:
2025,
Номер
5(1), С. 1 - 21
Опубликована: Янв. 1, 2025
<p>This
study
aimed
to
explore
consumer
perceptions
and
acceptance
of
potential
3D-printed
accessories
made
from
used
face
masks.
Based
on
the
principles
circular
economy,
a
proposed
conceptual
framework
was
developed
determine
role
experiential
value
in
relationship
between
product
design
perception
perceived
purchase
intention.
Data
were
collected
through
web-based
survey
questionnaire,
employing
nationwide
convenience
sample
consumers
via
crowdsourcing
marketplaces.
Among
899
respondents,
470
female,
429
male,
with
an
average
age
38.
A
structural
equation
model
test
hypotheses
framework.
The
findings
indicated
that
experience
plays
crucial
significantly
enhancing
intentions
for
Participants
identified
jewelry,
electronic
cases,
home
decor
items
(e.g.,
picture
frames)
as
top
three
preferred
categories
3D
printing.
Usability,
social
value,
environmental
concerns
emerged
most
influential
components
driving
accessories.
Additionally,
confirmed
mediating
These
provide
opportunities
rethink,
redesign,
reimagine
environmentally
responsible,
socially
inclusive,
economically
viable
practices.
development
new
printing
filaments
using
recycled
plastic-based
materials
further
aligned
Finally,
this
offers
critical
bridge
academia
industry,
paving
way
sustainable
future
innovation
manufacturing.</p>
Polymers,
Год журнала:
2025,
Номер
17(3), С. 382 - 382
Опубликована: Янв. 30, 2025
The
mechanical
recycling
of
thermoplastics
(especially
polyolefins)
often
results
in
recyclates
with
inferior
properties
compared
to
their
virgin
counterparts.
This
phenomenon
is
mainly
due
the
modification
polymer
microstructure
induced
by
degradation
processes
undergone
materials
during
service
life
and
reprocessing.
In
this
work,
a
promising
route
for
obtaining
high-melt-strength
recycled
high-density
polyethylene
(HDPE)
proposed.
particular,
exploited
approach
involves
utilization
commercially
available
additive
(i.e.,
Nexamite®
R305,
Nexam
Chemical,
Lomma,
Sweden),
which
was
demonstrated
be
capable
driving
thermo-mechanical
reactions
(experienced
HDPE
recycling)
towards
obtainment
long-chain
branched
microstructure,
thereby
enabling
further
processing
material
through
technologies
dominated
elongational
flow.
additive-induced
alterations
were
formulation
fibers,
performed
tensile
characterization
showed
that
additive-containing
exhibits
strikingly
improved
ductility
(namely,
elongation
at
break
350%
fibers
stretched
draw
ratio
60)
respect
pristine
HDPE.
Overall,
obtained
clearly
possibility
attaining
an
effective
upcycling
HDPE,
could
industrially
relevant
high-added-value
applications,
hence
paving
way
achievement
full
plastic
circularity.
