Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 10, 2025
ABSTRACT
Amidst
growing
interest
in
sustainable
packaging,
this
study
delves
into
the
preparation
of
polyvinyl
alcohol
(PVA)‐based
biofilms
filled
with
cellulose
nanocrystals
(CNCs)
sourced
from
red
onion
skin
waste,
coupled
bio‐active
extract
(OPE).
These
innovative
bionanocomposite
films
hold
promise
for
active
food
packaging
applications.
The
investigation
focuses
on
understanding
interplay
between
added
agents
(OPE
and
CNC)
macromolecular
chains
PVA.
Furthermore,
effects
various
OPE
concentrations
physicochemical
characteristics
antibacterial
properties
CNC‐filled
PVA
bio‐nanocomposites
were
also
examined.
integration
CNC
noticeably
enhanced
film's
properties.
Mechanical
strength
increased
by
37%,
thermal
stability
improved
a
92°C
increase
decomposition
temperature,
UV
barrier
45%.
Additionally,
activity
against
foodborne
pathogens
improved,
highest
inhibition
rates
reaching
89%
Staphylococcus
fungi
79%
aureus
.
findings
demonstrated
that
incorporation
significantly
barrier,
properties,
biodegradability
PVA‐CNC
bio‐nanocomposite
films.
present
promising
approach
solutions,
capable
extending
shelf
life
while
reducing
environmental
impact.
Further
research
real
systems
is
recommended
to
validate
these
results.
Cleaner Chemical Engineering,
Journal Year:
2023,
Volume and Issue:
5, P. 100094 - 100094
Published: Jan. 26, 2023
•
Hydrothermal
liquefaction
(HTL)
has
been
studied
for
plastic
recycling.
At
sub-
and
supercritical
conditions,
HTL
depolymerization
may
be
carried
out.
Subcritical
conditions
can
depolymerize
polymers
with
functional
groups.
It
is
easier
to
polyolefins
water(>
374
°C;
>
22
MPa).
Low-pressure
hydrothermal
(LP-HTL)
handle
polyolefin
hydrocarbons.
If
our
expectations
are
have
a
future
the
resources
provided
by
earth,
recycling
of
plastics
become
one
most
important
topics
that,
as
humans,
we
must
deal
with.
Among
technologies
developed
treating
this
issue
method.
In
review,
subcritical
processes
presented.
Experimental
methods
product
yields
disclosed
discussed.
previously
used
synthetic
containing
heteroatoms,
such
bisphenol-A-based
epoxy
resin
(Epoxy),
polyamide
6
(PA6),
6/6
(PA66),
polyethylene
terephthalate
(PET),
polycarbonate
(PC),
polyurethane
(PU).
This
type
polymer
broken
down
using
low-temperature,
low-pressure
method
because
it
heteroatoms
that
easy
break
down.
To
like
(PE)
polypropylene
(PP),
derivatives
mixtures,
formed
long
hydrocarbon
chains,
water
(>
23
MPa)
seem
required.
These
requirements
make
procedure
quite
expensive.
The
review
showed
new
uses
pressures
between
2.5
30
MPa,
temperatures
above
400
°C,
residence
times
20
60
min,
named
(LP-HTL),
hydrocarbon.
describes
needed
problematic
feedstock
and,
in
certain
way,
possible
utilization
technology
more
complex
waste
mixtures.
Progress in Materials Science,
Journal Year:
2024,
Volume and Issue:
144, P. 101289 - 101289
Published: March 28, 2024
This
comprehensive
review
explores
the
potential
of
tailored
carbon
materials
(TCM)
for
efficient
photocatalytic
degradation
polyaromatic
hydrocarbons
(PAHs),
which
are
persistent
and
toxic
organic
pollutants
posing
significant
environmental
challenges.
The
unique
structure
properties
TCM
including
graphene
nanotubes
to
activated
dots,
have
projected
them
as
next-generation
technological
innovation.
A
careful
critical
discussion
state-of-the-art
research
sheds
light
on
their
effectiveness
in
catalyzing
breakdown
PAHs,
projects
suitable
management
environment.
Beyond
this
viewpoint,
article
expands
scope
1)
biomedical
healthcare,
2)
energy
storage
conversion,
3)
advanced
electronics.
challenges,
opportunities,
future
perspectives
related
role
applications,
inspiring
further
research,
innovation
photo-induced
techniques
also
carefully
discussed
article.
focused
serves
a
valuable
resource
researchers
industrialists
interested
harnessing
capabilities
carbon-based
sustainable
PAHs
other
pollutants.
It
addresses
pressing
need
effective
remediation
pollution
control
strategies.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(14), P. 7309 - 7327
Published: Jan. 1, 2024
Oxidative
degradation
is
a
powerful
method
to
degrade
plastics
into
oligomers
and
small
oxidized
products.
While
thermal
energy
has
been
conventionally
employed
as
an
external
stimulus,
recent
advances
in
photochemistry
have
enabled
photocatalytic
oxidative
of
polymers
under
mild
conditions.
This
tutorial
review
presents
overview
degradation,
from
its
earliest
examples
emerging
strategies.
briefly
discusses
the
motivation
development
with
focus
on
underlying
mechanisms.
Then,
we
will
examine
modern
studies
primarily
relevant
catalytic
degradation.
Lastly,
highlight
some
unique
using
unconventional
approaches
for
polymer
such
electrochemistry.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 13, 2025
Poly(vinyl
chloride)
(PVC)
and
polystyrene
(PS)
are
among
the
least
recycled
plastics.
In
this
work,
we
developed
a
simple
novel
strategy
to
valorize
PVC
PS
plastics
via
photothermal
conversion
(1-chloroethyl)benzene,
commodity
chemical
with
excellent
versatility.
As
is
known
release
HCl
gas
decompose
into
conjugated
polyenes,
envisioned
dual
role
for
While
in
situ-generated
serves
as
chlorine
source,
resulting
dehydrochlorinated-PVC
(DHPVC)
functions
agent
accelerate
hydrochlorination
of
styrene.
We
converted
styrene
up
89%
(1-chloroethyl)benzene
less
than
1
h
white
light
irradiation.
Subsequent
nucleophilic
substitution
on
chloro-adduct
formed
1-phenylethanol
(a
fragrance
additive)
fendiline
heart
disease
drug)
high
yields.
The
system
applied
various
alkenes
compatible
post-consumer
waste
plasticizers.
Ultimately,
upcycling
photothermally
achieved
84%
under
LED
h,
co-upcycling
42%
yield
focused
sunlight
irradiation
just
4
min.
