Biomacromolecules,
Journal Year:
2024,
Volume and Issue:
26(1), P. 428 - 436
Published: Dec. 17, 2024
The
influence
of
lignin's
primary
oxygen-containing
functional
groups,
phenolic
OH
(Ph–OH)
and
methoxyl
(OMe)
especially
the
Ph–OH/OMe
ratio,
on
its
UV
absorptivity
long-lasting
blocking
remains
unclear.
In
this
study,
organosolv
lignins
(OLs)
with
varying
Ph–OH
OMe
contents
were
prepared
to
evaluate
their
photostability
by
EPR
(electron
paramagnetic
resonance).
As
increased
from
0.32
6.09
mmol/g,
lignin
a
higher
content
displayed
better
strong
correlation
(Pearson's
r
=
0.95).
However,
an
excessive
(>5.5
mmol/g)
reduced
spin
lignin,
negatively
affecting
photostability.
Taking
groups
as
cofactor,
OLs
ratios
between
0.44
0.64
showed
more
favorable
UV-blocking
performance
both
in
initial
state
after
irradiation.
Moreover,
lignin-based
sunscreens
exhibited
increasing
SPF
value
even
8
h
exposure,
confirming
property.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
Abstract
Hydrogel
coatings
are
crucial
strategies
for
integrating
substrates
with
functional
surfaces.
coating
a
facile
process,
high
toughness,
and
ultrathin
thickness
is
highly
desired.
This
study
utilizes
the
self‐assembly
of
hydrophobic
lignin
into
chain‐dense
regions
during
solvent
evaporation
constructed
hydrogel
Janus
structure
from
hydrophilic
polymer
through
coating‐drying‐swelling
process
at
room
temperature
(25
°C).
The
formed
as
lignin‐aggregated
remained
bottom
while
swell
top.
constrained
swelling
coating,
allowing
an
layer
≈8
µm.
Additionally,
region
increases
stiffness
toughness
thin
film
by
establishing
strong
interfacial
bonding
substrate
via
dense
Van
der
Waals
forces,
thereby
increasing
overall
adhesion
energy
to
various
such
glass,
polytetrafluoroethylene
(PTFE),
metal,
rubber.
hydration
swollen
on
top,
which
improves
lubrication
antifouling
properties.
Furthermore,
exhibits
stability
in
water
saline
solutions,
ultraviolet
shielding
properties,
ability
be
removed
recycled
after
use.
Buildings,
Journal Year:
2024,
Volume and Issue:
14(10), P. 3276 - 3276
Published: Oct. 16, 2024
Asphalt,
as
a
key
binder
material
in
road
construction,
is
susceptible
to
ultraviolet
(UV)
radiation-induced
aging,
leading
embrittlement
and
reduced
durability.
Despite
the
significance
of
UV
research
this
area
remains
limited
compared
that
on
thermal
aging.
This
paper
comprehensively
reviews
current
state
aging
asphalt,
focusing
its
mechanism,
evaluation
indicators,
methods
delay
or
avoid
The
structural
components,
rheological
properties,
mechanisms
asphalt
are
discussed.
Various
simulation
methods,
including
use
chambers
accelerated
tests,
presented
along
with
their
tests
such
dynamic
shear
rheometry,
rutting
Fourier
infrared
spectroscopy,
bending
beam
rheology.
Key
indicators
used
assess
physical
parameters,
chemical
composition
changes,
summarized.
underlying
particularly
changes
asphalt’s
components
examined.
impact
factors
like
radiation
intensity,
temperature,
composition,
film
thickness
Additionally,
various
additives
modifiers,
modified
bitumen,
shielding
agents,
absorbers,
antioxidants,
nanomodifiers,
reviewed
for
potential
mitigate
concludes
by
highlighting
challenges
developing
standardized
test
equipment
criteria,
limitations
organic
need
further
nanomaterials
improve
resistance.
Advances in chemical and materials engineering book series,
Journal Year:
2024,
Volume and Issue:
unknown, P. 206 - 230
Published: Feb. 27, 2024
Nanotechnology
has
emerged
as
a
revolutionary
field
with
diverse
applications,
including
nanocoatings
for
medicinal
purposes.
Nanocoatings,
their
unique
properties
and
capabilities,
have
opened
new
avenues
drug
delivery,
medical
devices,
antimicrobial
treatments.
Nanocoatings
can
be
engineered
to
encapsulate
therapeutic
agents,
protecting
them
from
degradation
facilitating
targeted
delivery
specific
tissues
or
cells.
The
use
of
on
surfaces
also
shown
promising
results
in
preventing
infections
combating
antibiotic-resistant
pathogens.
While
offer
tremendous
potential,
concerns
about
potential
toxicity,
biocompatibility,
long-term
effects
require
rigorous
evaluation
testing.
Furthermore,
the
study
highlights
ongoing
research
future
prospects
nanocoatings.
development
multifunctional
that
combine
sensing
tissue
regeneration
holds
promise
personalized
medicine
advanced
therapeutics.
