Polymers,
Journal Year:
2024,
Volume and Issue:
16(8), P. 1151 - 1151
Published: April 19, 2024
This
study
aimed
to
investigate
the
sustainable
use
of
recycled
plastics,
specifically
polypropylene
(PP)
and
high-density
polyethylene
(HDPE),
in
manufacture
geogrids
for
geotechnical
civil
engineering
applications.
Plastics
were
collected
from
a
recycling
center,
targeting
containers
used
food,
cleaning
products,
other
domestic
packaging
items.
These
plastics
sorted
according
Möbius
triangle
classification
system,
with
HDPE
(#2)
PP
(#5)
being
primary
categories
interest.
The
research
methodologically
evaluates
mechanical
properties
PP/HDPE
(0/100,
25/75,
50/50,
75/25
100/0%
w/w)
composites
through
tensile
flexural
tests,
exploring
various
compositions
configurations
geogrids.
results
highlight
superiority
pure
processed
into
1.3
mm
thick
laminated
yarns
hot
air
welded
20
30
s,
exhibiting
deformation
exceeding
60%
comparison
composites.
Through
SolidWorks®
Simulation,
it
was
shown
that
adoption
trigonal
geogrid
geometry
optimizes
force
distribution
strength,
significantly
improving
slope
stabilization
efficiency.
Based
on
obtained,
laboratory-scale
prototype
developed
using
an
extrusion
process.
underscore
importance
careful
composite
design
yarn
configuration
selection
achieve
desired
performance
It
emphasizes
potential
as
viable
environmentally
friendly
solution
stabilizing
slopes,
contributing
reduction
plastic
waste
promoting
construction
practices.
ChemistrySelect,
Journal Year:
2025,
Volume and Issue:
10(17)
Published: April 30, 2025
Abstract
This
paper
focuses
on
the
green
recycling
technology
of
Polyethylene
Terephthalate
(PET),
which,
as
most
widely
consumed
textile
fiber
globally,
has
become
a
key
area
in
waste
research.
While
traditional
acid‐catalyzed
methods
have
demonstrated
value
PET
depolymerization,
harsh
acidic
reaction
conditions
pose
significant
technical
challenges,
including
catalyst
deactivation
and
severe
equipment
corrosion.
Based
principles
chemistry
engineering,
this
study
innovatively
develops
temperature‐sensitive
heteropolyacid
catalyst,
(HOCH
2
CH
N(CH
3
)
x
H
3‐
PW
12
O
40
(Ch
,
=
1,
2,
3),
synthesized
by
ion
exchange
between
choline
chloride
phosphotungstic
acid.
Under
optimized
(200
°C,
7
h,
solid–liquid
ratio
1:10,
0.2
g
catalyst),
achieves
99%
conversion
rate
96%
recovery
terephthalic
acid
(rTPA),
with
product
purity
reaching
99.7%.
Kinetic
studies
based
first‐order
mechanisms
reveal
an
apparent
activation
energy
E
86.72
kJ/mol
for
hydrolysis
reaction.
Notably,
through
temperature
regulation
crystallization
techniques,
used
Ch
3‐x
can
be
easily
recovered
from
product,
maintaining
its
catalytic
activity
after
six
consecutive
cycles.
innovative
system,
which
combines
high
efficiency
excellent
recyclability,
significantly
reduces
consumption
minimizes
emissions
compared
to
methods,
providing
breakthrough
solution
development
closed‐loop
system
PET.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(8), P. 1151 - 1151
Published: April 19, 2024
This
study
aimed
to
investigate
the
sustainable
use
of
recycled
plastics,
specifically
polypropylene
(PP)
and
high-density
polyethylene
(HDPE),
in
manufacture
geogrids
for
geotechnical
civil
engineering
applications.
Plastics
were
collected
from
a
recycling
center,
targeting
containers
used
food,
cleaning
products,
other
domestic
packaging
items.
These
plastics
sorted
according
Möbius
triangle
classification
system,
with
HDPE
(#2)
PP
(#5)
being
primary
categories
interest.
The
research
methodologically
evaluates
mechanical
properties
PP/HDPE
(0/100,
25/75,
50/50,
75/25
100/0%
w/w)
composites
through
tensile
flexural
tests,
exploring
various
compositions
configurations
geogrids.
results
highlight
superiority
pure
processed
into
1.3
mm
thick
laminated
yarns
hot
air
welded
20
30
s,
exhibiting
deformation
exceeding
60%
comparison
composites.
Through
SolidWorks®
Simulation,
it
was
shown
that
adoption
trigonal
geogrid
geometry
optimizes
force
distribution
strength,
significantly
improving
slope
stabilization
efficiency.
Based
on
obtained,
laboratory-scale
prototype
developed
using
an
extrusion
process.
underscore
importance
careful
composite
design
yarn
configuration
selection
achieve
desired
performance
It
emphasizes
potential
as
viable
environmentally
friendly
solution
stabilizing
slopes,
contributing
reduction
plastic
waste
promoting
construction
practices.
