Polymers,
Journal Year:
2023,
Volume and Issue:
16(1), P. 135 - 135
Published: Dec. 31, 2023
Recycling
low-end,
one-time-use
plastics—such
as
low-density
polyethylene
(LDPE)—is
of
paramount
importance
to
combat
plastic
pollution
and
promote
sustainability
in
the
modern
green
economy.
This
study
valorizes
LDPE
waste
by
transforming
it
into
3D
oleophilic
swellable
thin
films
through
a
process
involving
dissolution,
phase
separation,
extraction.
These
are
subsequently
layered
using
customized
polypropylene
(PP)
based
nonwoven
fabric
separator
securely
sealed
zigzag
pattern.
The
zigzag-shaped
seal
enhances
adhesion
pollutants
sorbent
providing
wire
curvatures
that
increase
retention
time
uptake
capacity.
As
result,
exhibits
impressive
oil
capacities,
with
immediate
equilibrium
values
120
g/g
85
g/g,
respectively.
Notably,
as-prepared
demonstrates
low
water
high
selectivity
for
oil,
outperforming
commercially
available
sorbents.
unique
design
3D-film
structure,
superposed
films,
offers
sustainable
value-added
solution
issues
spills
on
surfaces.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
481, P. 148560 - 148560
Published: Jan. 4, 2024
A
key
aspect
of
advancing
sustainable
membrane
technology
is
to
source
eco-friendly
polymers,
such
as
recycled
plastic
waste,
use
renewable
plant-based
solvents,
and
limit
the
number
solvents
used
in
dissolution-precipitation
processes.
In
this
study,
we
upcycle
polypropylene
PP
waste
into
bi-layered
microporous
superhydrophobic
membranes
using
a
single
solvent,
Cymene,
through
tandem
spin-casting
annealing.
The
surface
roughness
hydrophobicity
top
layer
enhance
selectivity,
while
presence
micropores
ensures
efficient
liquid
passage
high
permeability.
bottom
serves
substrate
for
layer,
providing
structural
support.
Various
annealing
conditions
were
employed
optimize
hydrophobicity,
roughness,
porosity
strength
as-prepared
membranes,
yielding
permeance
outstanding
separation
efficiency.
fabricated
subjected
oil–water
emulsion
separations,
demonstrating
contact
angle
exceeding
155°
123
nm,
resulting
an
organic
solvent
flux
14,000
Lm-2h−1
with
96
%
water
rejection.
Tensile
strain
found
be
13–28
MPa
20–27
%,
respectively.
This
research
provided
access
environmentally
friendly
adding
value
potential
benefits
both
polymer
industries
they
transition
towards
circular
economy.
Journal of Hazardous Materials,
Journal Year:
2024,
Volume and Issue:
466, P. 133597 - 133597
Published: Jan. 23, 2024
The
global
pollution
crisis
arising
from
the
accumulation
of
plastic
in
landfills
and
environment
necessitates
addressing
waste
issues.
Notably,
polypropylene
(PP)
accounts
for
20%
total
holds
promise
hydrophobic
applications
realm
recycling.
Herein,
transparent
non-transparent
superhydrophobic
films
made
PP
are
reported.
A
hierarchical
structure
with
protrusions
is
induced
through
spin-casting
thermally
phase
separation.
had
a
water
contact
angle
159°
could
vary
thickness,
strength,
roughness,
hydrophobicity
depending
on
end-user
requirements.
Bode
plot
indicated
enhanced
corrosion
resistance
films.
Antibacterial
trials
Escherichia
coli
Staphylococcus
aureus
microbial
solutions
showed
that
film
significantly
lower
rate
colony-forming
units
compared
to
both
surface
control
blank
sample.
Moreover,
life
cycle
assessment
revealed
production
resulted
62%
embodied
energy
34%
carbon
footprint
virgin
pellets
sourced
petroleum.
These
exhibit
distinctiveness
their
dual
functionality
as
coatings
freestanding
Unlike
conventional
require
chemical
application
onto
substrate,
these
can
be
mechanically
applied
using
adhesive
tapes
variety
surfaces.
Overall,
effective
recycling
into
versatile
not
only
reduces
environmental
impact
but
also
paves
way
more
sustainable
eco-friendly
future.
One
dealing
reimagine
it
an
abundant
feedstock
valuable
products.
This
work
attempts
present
how
industry
transform
circular
sector
by
providing
alternate
reusing
waste,
specifically
repurposing
multi-purpose
Suitable
applications,
offer
weather
resistance,
self-cleaning,
anti-corrosion,
antibacterial
properties.
study
promotes
greener
future
mitigating
fostering
environmentally
friendly
alternatives.
Advanced Composites and Hybrid Materials,
Journal Year:
2024,
Volume and Issue:
7(1)
Published: Jan. 9, 2024
Abstract
Superhydrophobic
surfaces
are
typically
created
by
enhancing
nanoscale
roughness
or
incorporating
anti-wetting
additives
like
silanes,
nanoparticles,
fluorinated
compounds.
Limited
the
availability
of
nano-structured
templates,
simple
fabrication,
flexibility
material,
and
cost-effectiveness,
quest
to
synthesize
superhydrophobic
films
remains
challenging.
Herein,
we
report
valorizing
mixed
plastic
waste
for
synthesis
flexible
via
open-loop
recycling.
We
focused
on
improving
surface
material
using
a
series
steps
including
selective
dissolution,
thermally
induced
phase
separation,
controlled
spin-casting,
annealing.
synthesized
two-layered
film
with
high
sufficient
mechanical
strength,
making
it
suitable
use
as
free-standing
material.
The
contact
sliding
angles
were
found
be
159°
4°,
respectively,
an
RMS
(root
mean
square)
228
nm.
This
approach
is
demonstrated
mixtures
high-density
polyethylene
(HDPE),
low-density
(LDPE),
polypropylene
(PP),
which
among
most
abundant
components
post-consumer
waste.
Life
cycle
assessments
show
that
have
lower
carbon
dioxide
emissions
embodied
energy
than
virgin
PE
PP
derived
from
petroleum.
Our
design
strategy
not
only
yields
product
but
also
provides
alternative
recycling
bypassing
cost-intensive
sorting
techniques.
Graphical
Trends in Chemistry,
Journal Year:
2024,
Volume and Issue:
6(3), P. 100 - 114
Published: Feb. 5, 2024
Plastics
possess
highly
unsustainable
linear
life
cycles
that
are
environmentally
damaging.
With
low
recycling
rates
worldwide,
plastics
upcycling
is
emerging
as
a
promising
alternative
by
using
these
abundant
waste
products
chemical
feedstock
for
the
production
of
materials
and
essential
chemicals
higher
economic
value.
However,
saturated
C–C
polymer
backbones
polymers
constituting
~60%
all
plastic
unreactive
challenging
to
upcycle,
often
necessitating
energy-intensive
processes.
This
review
examines
state-of-the-art
sustainable
approaches
employing
Principles
Green
Chemistry
functionalize
or
cleave
backbones,
including
solvents,
Earth-abundant
metal
catalysis,
low-energy
approaches,
biocatalysis.
Such
strategies
will
enhance
attractiveness
practical
feasibility
achieve
circular
economy.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(18), P. 2604 - 2604
Published: Sept. 14, 2024
The
use
of
deep
eutectic
solvents
(DESs)
for
the
preparation
polymer
membranes
environmental
separation
technologies
is
comprehensively
reviewed.
DESs
have
been
divided
into
five
categories
based
on
hydrogen
bond
donor
(HBD)
and
acceptor
(HBA)
that
are
involved
in
production
DESs,
a
wide
range
DESs’
physicochemical
characteristics,
such
as
density,
surface
tension,
viscosity,
melting
temperature,
initially
gathered.
Furthermore,
most
popular
techniques
creating
demonstrated
discussed,
with
focus
non-solvent
induced
phase
(NIPS)
method.
Additionally,
number
studies
reported
which
were
employed
pore
formers,
solvents,
additives,
or
co-solvents,
among
other
applications.
addition
to
manufacturing
process
increased
presence
finger-like
structures
macrovoids
cross-section
and,
numerous
occasions,
had
substantial
impact
overall
porosity
size.
Performance
data
also
gathered
made
various
technologies,
ultrafiltration
(UF)
nanofiltration
(NF).
Lastly,
provide
options
functionalization
membranes,
creation
liquid
membrane
types,
special
supported
(SLMs)
decarbonization
discussed
terms
permeability
selectivity
several
gases,
including
CO2,
N2,
CH4.
ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
6(9), P. 4042 - 4050
Published: Aug. 1, 2024
The
solvent-targeted
recovery
and
precipitation
(STRAP)
process
separates
recovers
the
constituent
resins
in
multilayer
plastic
packaging
films
by
selective
polymer
dissolution.
In
this
work,
three
different
experimental
methods
were
considered
to
recover
a
polyethylene
(PE)
resin
from
printed
film
STRAP.
consisted
of
(1)
filter
bag
system,
(2)
Soxhlet
extraction,
(3)
jacketed
dissolution
vessel.
Cast
produced
with
PE
recovered
each
method
analyzed
for
color,
mechanical
properties,
number
impurities.
High-quality
recycled
cast
can
be
increasing
solvent
ratio,
including
pore
size
100
μm,
optimizing
temperature
control
This
study
demonstrates
that
STRAP
polymers
back
into
films,
enabling
potential
circularity
these
materials.
Chemical Engineering Journal,
Journal Year:
2023,
Volume and Issue:
471, P. 144365 - 144365
Published: June 24, 2023
Applications
of
polar
aprotic
solvents
are
inevitable
in
the
chemical
industry,
but
few
nonhazardous
alternatives
available.
Herein,
we
propose
methyl
sesamol
(MeSesamol)
as
a
promising
new
bio-based
alternative
for
and
demonstrate
its
versatile
applications.
MeSesamol
was
derived
from
natural
resources
using
environmentally
friendly
facile
procedures,
such
methylation
dimethyl
carbonate.
has
distinctive
smell
demonstrates
excellent
properties
green
solvent
candidate:
high
boiling
open-cup
flash
points,
immiscibility
with
water
miscibility
common
organic
solvents,
stability
resistance
to
several
acids
bases.
an
effective
nine
C–C
coupling
reactions,
including
Suzuki
Sonogashira
reactions
asymmetric
Michael
addition.
lies
close
dichloromethane
(DCM)
Hansen
space
achieves
similar
or
higher
yield
enantiomeric
excess
(up
97%
99%,
respectively)
compared
DCM.
proved
be
recyclable
depolymerizations
bisphenol-A
polycarbonate
(BPA–PC)
polyethylene
terephthalate
(PET).
recycled
five
reaction
cycles
efficiency
(92%–100%)
outstanding
cumulative
monomer
yields
(92%
BPA–PC
92%
terephthalic
acid
PET).
To
properly
compare
depolymerization
two
metrics,
namely,
corrected
energy-economy
factor
(εcorr)
environmental
energy
impact
(ξcorr).
