ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(17), P. 6494 - 6508
Published: April 12, 2024
Unsaturated
biopolymers
(e.g.,
natural
rubber
(NR))
are
highly
vulnerable
to
thermo-oxidative
degradation,
which
causes
premature
failure
of
NR
products.
As
an
indispensable
antioxidant
globally,
6PPD
(N-(1,3-dimethyl
butyl)-N′-phenyl-p-phenylenediamine)
is
employed
retard
the
aging
NR.
Unluckily,
and
6PPD-quinone
(an
oxidative
product
6PPD)
harmful
aquatic
human
life
and,
thus,
obviously
merit
their
replacement
with
sustainable
safer
antioxidants
for
environmental
protection.
This
study
explored
use
curcumin
NR-based
polymer
nanocomposites
(PNCs).
The
combined
experimental,
molecular
dynamics
(MD),
quantum
mechanics
(QM)
simulations
implemented
analyze
effect
isomeric
forms
on
protective
mechanism,
stability,
solubility,
dispersibility,
diffusion
in
matrix.
results
revealed
that
both
scavenged
free
radical
preferentially
via
a
hydrogen
atom
transfer
mechanism.
computed
transition
state
energies
show
curcumin's
enolic
form
(i.e.,
Curcumin
(E))
interacts
ROO.
(peroxy)
radicals
lower
barrier
energy
compared
could
protect
from
aging.
MD
have
shown
interfacial
interactions
at
NR-curcumin
interface
resulted
stronger
binding
energies,
thus
improving
solubility
dispersibility
mean
square
displacement
than
6PPD.
While
migration
necessary
replenish
concentrations
tire
surface,
higher
rate
may
cause
physical
loss
decrease
service
NR-PNCs.
Overall,
NR-PNCs
loaded
exhibited
improved
resistance
viscoelastic
performance
PNCs
made
Thus,
as
safe
antioxidant,
open
essential
avenue
toward
substantial
pollution
abatement
accumulated
waste
products
making
"Greener
NR-PNCs.″
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(12), P. 5500 - 5511
Published: March 14, 2024
Stormwater
rapidly
moves
trace
organic
contaminants
(TrOCs)
from
the
built
environment
to
aquatic
environment.
Bioretention
cells
reduce
loadings
of
some
TrOCs,
but
they
struggle
with
hydrophilic
compounds.
Herein,
we
assessed
potential
enhance
TrOC
removal
via
changes
in
bioretention
system
design
by
simulating
fate
seven
high-priority
stormwater
TrOCs
(e.g.,
PFOA,
6PPD-quinone,
PAHs)
log
KOC
values
between
−1.5
and
6.74
a
cell.
We
evaluated
eight
management
interventions
for
three
illustrative
use
cases
representing
highway,
residential
area,
an
airport.
suggest
two
metrics
performance:
mass
advected
sewer
network,
which
poses
acute
risk
ecosystems,
total
system,
longer-term
persistent
The
optimized
designs
each
case
reduced
effluent
all
most
polar
compound
(PFOA)
<5%
influent
mass.
Our
results
that
having
largest
possible
area
allowed
systems
provide
benefits
during
larger
events,
improved
performance
To
improve
amendment
like
biochar
was
necessary;
field-scale
research
is
needed
confirm
this
result.
showed
changing
can
allow
them
effectively
capture
wide
range
physicochemical
properties,
protecting
human
health
species
chemical
impacts.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(17), P. 6494 - 6508
Published: April 12, 2024
Unsaturated
biopolymers
(e.g.,
natural
rubber
(NR))
are
highly
vulnerable
to
thermo-oxidative
degradation,
which
causes
premature
failure
of
NR
products.
As
an
indispensable
antioxidant
globally,
6PPD
(N-(1,3-dimethyl
butyl)-N′-phenyl-p-phenylenediamine)
is
employed
retard
the
aging
NR.
Unluckily,
and
6PPD-quinone
(an
oxidative
product
6PPD)
harmful
aquatic
human
life
and,
thus,
obviously
merit
their
replacement
with
sustainable
safer
antioxidants
for
environmental
protection.
This
study
explored
use
curcumin
NR-based
polymer
nanocomposites
(PNCs).
The
combined
experimental,
molecular
dynamics
(MD),
quantum
mechanics
(QM)
simulations
implemented
analyze
effect
isomeric
forms
on
protective
mechanism,
stability,
solubility,
dispersibility,
diffusion
in
matrix.
results
revealed
that
both
scavenged
free
radical
preferentially
via
a
hydrogen
atom
transfer
mechanism.
computed
transition
state
energies
show
curcumin's
enolic
form
(i.e.,
Curcumin
(E))
interacts
ROO.
(peroxy)
radicals
lower
barrier
energy
compared
could
protect
from
aging.
MD
have
shown
interfacial
interactions
at
NR-curcumin
interface
resulted
stronger
binding
energies,
thus
improving
solubility
dispersibility
mean
square
displacement
than
6PPD.
While
migration
necessary
replenish
concentrations
tire
surface,
higher
rate
may
cause
physical
loss
decrease
service
NR-PNCs.
Overall,
NR-PNCs
loaded
exhibited
improved
resistance
viscoelastic
performance
PNCs
made
Thus,
as
safe
antioxidant,
open
essential
avenue
toward
substantial
pollution
abatement
accumulated
waste
products
making
"Greener
NR-PNCs.″
