Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(33)
Published: June 13, 2024
Abstract
Plastics,
renowned
for
their
outstanding
properties
and
extensive
applications,
assume
an
indispensable
irreplaceable
role
in
modern
society.
However,
the
ubiquitous
consumption
of
plastic
items
has
led
to
a
growing
accumulation
waste.
Unreasonable
practices
production,
utilization,
recycling
plastics
have
substantial
energy
resource
depletion
environmental
pollution.
Herein,
state‐of‐the‐art
advancements
lifecycle
management
are
timely
reviewed.
Unlike
typical
reviews
focused
on
recycling,
this
work
presents
in‐depth
analysis
entire
plastics,
covering
whole
process
from
synthesis,
processing,
ultimate
disposal.
The
primary
emphasis
lies
selecting
judicious
strategies
methodologies
at
each
stage
mitigate
adverse
impact
waste
plastics.
Specifically,
article
delineates
rationale,
methods,
realized
various
stages
through
both
physical
chemical
pathways.
focal
point
is
attainment
optimal
rates
thereby
alleviating
ecological
burden
By
scrutinizing
aims
furnish
comprehensive
solutions
reducing
pollution
fostering
sustainability
across
all
facets
Progress in Polymer Science,
Journal Year:
2024,
Volume and Issue:
151, P. 101805 - 101805
Published: Feb. 22, 2024
Polyurethanes
(PU)
are
ranked
amongst
the
6th
most
manufactured
worldwide
polymers
and
widely
used
in
a
variety
of
applications
due
to
diversity
properties
they
offer.
Nevertheless,
PUs
raising
questions
around
environmental,
legislative,
health,
recycling
concerns.
In
this
context,
high
isocyanate
toxicity,
blocked
isocyanates,
waterborne
PU
systems,
non-isocyanate
polyurethane
(NIPU)
were
introduced
prevent
handling
risks.
Moreover,
sustainable
feedstocks
stood
out
synthetize
greener
PU.
particular,
bio-based
polyfunctional
short
alcohol
compounds
have
emerged
design
fully
materials
with
targeted
chemical
mechanical
properties.
Finally,
large
amounts
that
been
placed
on
market
now
leading
environmental
issues
regarding
its
accumulation
environment.
Several
methods
thus
recently
developed
facilitate
their
end-of-life
management
recyclability.
This
review
provides
complete
overview
recent
advances
synthesis
focus
replacement
toxic
isocyanates
petroleum-based
resources,
use
processes,
methods.
After
quick
summary
history
situation,
different
alcohols
academic
industrial
sides,
corresponding
outlined.
Furthermore,
pathways
produce
NIPUs
discussed.
enzymatic
Macromolecules,
Journal Year:
2023,
Volume and Issue:
56(3), P. 731 - 750
Published: Feb. 6, 2023
A
crucial
modern
dilemma
relates
to
the
ecological
crisis
created
by
excess
plastic
waste
production.
An
emerging
technology
for
reducing
is
production
of
"chemically
recyclable"
polymers.
These
polymers
can
be
efficiently
synthesized
through
ring-opening
polymerization
(ROP/ROMP)
and
later
recycled
pristine
monomer
ring-closing
depolymerization,
in
an
efficient
circular-type
system.
This
Perspective
aims
explore
chemistry
involved
preparation
these
monomer/polymer
systems,
while
also
providing
overview
challenges
involved,
including
future
directions.
ChemCatChem,
Journal Year:
2023,
Volume and Issue:
15(13)
Published: March 29, 2023
Abstract
Polyolefins
and
especially
polyethylenes
(LLDPE,
LDPE
HDPE)
polypropylene
(PP)
contribute
a
great
deal
to
the
growing
amounts
of
plastic
waste
with
combined
production
share
almost
50
%
by
mass.
While
being
universally
applicable,
they
are
mainly
used
for
short‐lived
packaging
materials
that
constitute
over
60
annual
post‐consumer
waste.
Thus,
disproportionately
high
polyolefins
end
up
as
(PCW)
management
strategies
these
particularly
inert
plastics
needed.
This
necessity
has
promoted
research
effort
dealing
valorization
discarded
but,
nevertheless,
valuable
materials.
review
aims
highlight
scientific
advances
made
in
chemical
polyolefin
recycling
recent
years,
focusing,
though
not
exclusively,
on
catalytic
processes
recycle
various
means
at
more
moderate
temperatures
compared
pyrolysis
such
deconstructing
polymer
objective
upcycling
mind
or
transformation
give
access
functional
chemicals.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(7), P. 4865 - 4926
Published: March 18, 2024
Rapid
industrialization
and
development
have
led
to
a
tremendous
increase
in
the
use
of
various
types
plastic
commodities
daily
life.
For
past
several
years,
pollution
has
become
global
issue,
posing
serious
threat
mankind.
The
primary
issue
with
increasing
is
lack
proper
management
which
created
huge
havoc
environment.
From
initial
phase
waste
management,
been
discarded,
recycled,
downcycled,
or
dumped
into
landfills
large
proportion,
causing
extreme
damage
ecosystem.
Conventionally,
treated
via
thermal
processes
such
as
pyrolysis
incineration
plants
require
amount
capital
and,
therefore,
harms
aim
circular
economy.
Chemical
upcycling
gaining
attention
high-potential
catalytic
strategy
convert
plastics,
polyethylene
terephthalate,
polyethylene,
polystyrene,
etc.
fuels,
functionalized
polymers,
other
value-added
chemicals
having
direct
impact
on
affordability
viability.
In
this
review,
we
focused
photocatalysis,
electrocatalysis,
photoelectrocatalysis
effective
efficient
technologies.
These
approaches
can
lower
dependence
nonrenewable
resources
are
more
environmentally
friendly
contrast
conventional
approaches.
This
review
elaborately
discusses
pros
cons
provides
detailed
overview
potential
renewable
energy-driven
for
conversion
wastes
valuable
fuels
commodity
chemicals,
along
challenges
future
directions
emerging
approach
treatment.
Cell Reports Physical Science,
Journal Year:
2023,
Volume and Issue:
4(5), P. 101341 - 101341
Published: March 29, 2023
Polymers
have
become
an
indispensable
part
of
our
daily
lives,
and
today
we
produce
around
370
MT
plastic
per
year.
Only
about
20%
it
is
being
recycled,
the
rest,
80%,
unleashed
into
environment
without
appropriate
treatment.
This
calls
forth
evaluation
strategies
available
for
mitigating
menace
"after-use"
waste.
Various
approaches
evolved
over
a
decade
are
at
different
levels
development.
Plastic
depolymerization
upcycling
considered
some
most
prominent
long-term
solutions.
The
metal-catalyzed
waste
to
chemical
feedstocks
has
emerged
as
one
promising
ways
address
global
pollution.
Therefore,
this
review
aims
examine
methods,
notify
recent
progress,
pinpoint
current
gaps,
gauge
potential
strategy.
Both
homogeneous
heterogeneous
catalysts
been
reported
depolymerize
various
polymers
last
decade.
Considerable
advances
in
metal-mediated
polyolefins,
polyesters,
polycarbonates,
polyurethanes,
polyamides,
polyethers.
above
produces
monomers
or
intermediates,
which
can
be
used
again
polymerization
thus
brings
back
circularity.
overview
debates
usage
high
temperatures,
sophisticated
ligands,
expensive
metals,
stoichiometric
reagents,
etc.,
depolymerization.
Thus,
summarizes
understanding
fundamental
science
depolymerization,
remaining
scientific
challenges,
opportunities.
Macromolecules,
Journal Year:
2024,
Volume and Issue:
57(5), P. 1919 - 1940
Published: Feb. 22, 2024
The
large
production
and
indiscriminate
disposal
of
plastics
have
resulted
in
serious
resource
global
environmental
crises,
which
has
raised
a
demand
to
develop
more
sustainable
circular
economy.
An
ideal
strategy
address
the
end-of-life
issue
is
next-generation
polymers
with
closed-loop
life
cycles,
can
be
selectively
depolymerized
back
monomers
at
end
their
service
life.
Aliphatic
polyesters
prepared
by
ring-opening
polymerization
(ROP)
moderately
strained
lactones
shown
great
potential
recyclable
polymers.
This
Perspective
highlights
recent
achievements
for
that
are
derived
from
four-,
five-,
six-,
seven-membered
focusing
on
discussion
thermodynamic
kinetic
considerations,
monomer
design
principles
polymer
preparations,
material
properties,
chemical
recyclability.
Finally,
current
challenges
possible
directions
also
discussed.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(10), P. 7076 - 7087
Published: March 1, 2024
The
present
polyolefin
hydrogenolysis
recycling
cases
acknowledge
that
zerovalent
Ru
exhibits
high
catalytic
activity.
A
pivotal
rationale
behind
this
assertion
lies
in
the
propensity
of
majority
species
to
undergo
reduction
within
milieu.
Nonetheless,
suitability
as
an
optimal
structural
configuration
for
accommodating
multiple
elementary
reactions
remains
ambiguous.
Here,
we
have
constructed
stable
Ru0–Ruδ+
complex
species,
even
under
reaction
conditions,
through
surface
ligand
engineering
commercially
available
Ru/C
catalysts.
Our
findings
unequivocally
demonstrate
surface-ligated
can
be
stabilized
form
a
Ruδ+
state,
which,
turn,
engenders
perturbation
σ
bond
electron
distribution
carbon
chain,
ultimately
boosting
rate-determining
step
C–C
scission.
optimized
catalysts
reach
solid
conversion
rate
609
g·gRu–1·h–1
polyethylene.
This
achievement
represents
4.18-fold
enhancement
relative
pristine
catalyst
while
concurrently
preserving
remarkable
94%
selectivity
toward
valued
liquid
alkanes.
Of
utmost
significance,
extended
gentle
mixing
solution
at
room
temperature,
thus
rendering
it
amenable
swift
integration
into
industrial
processes
involving
degradation.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(40)
Published: April 16, 2024
Abstract
In
the
quest
of
renewable
energy
technologies,
solar
photoreforming
emerges
as
one
affordable
yet
challenging
process
for
converting
biomass
into
hydrogen,
hydrocarbon
fuels,
and
chemicals.
This
review
highlights
state‐of‐the‐art
photoreforming,
elucidating
its
underlying
mechanisms
conversion
dissipated
polymers
H
2
valuable
Biomass
feedstocks
such
carbohydrates,
agricultural
residues,
glycopolymers,
food
wastes,
waste
plastics
are
evaluated
based
on
their
chemical
composition,
content,
sustainability
aspects,
exploring
selection
appropriate
bio‐renewable
resources,
considering
abundance,
availability,
potential
hydrogen
production.
The
impact
diverse
parameters
efficiency
is
explored,
encompassing
factors
like
reaction
temperature,
pH,
catalyst
loading,
reactor
design,
solvent
effect,
light
intensity
across
various
sacrificial
substrates.
discussion
also
considers
correlation
with
production
rate,
selectivity,
efficiency.
buckles
design
synthesis
functional
photocatalysts
biomass‐derived
feedstock,
highlighting
photocatalytic
(PC)
properties
in
reforming
processes
related
feedstock
chemicals
biofuel.
delves
pathways
future
advancements
including
artificial
intelligence
(AI)
machine
learning
(ML),
alongside
addressing
challenges
insightful
perspectives
within
this
evolving
field
green
energy.
