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.
ChemistrySelect,
Journal Year:
2025,
Volume and Issue:
10(1)
Published: Jan. 1, 2025
Abstract
Bio‐based
resources
as
reinforcing
agents
for
elastomers
is
an
important
area
of
research.
In
this
study,
different
types
lignin
were
employed
fillers
synthetic
elastomers.
Polychloroprene
(CR),
a
polar
rubber,
and
solution
styrene
butadiene
rubber
(SSBR),
non‐polar
used
matrix
materials.
Results
showed
that
filled
with
Kraft
exhibited
better
mechanical
performance
than
those
lignosulfonate.
Without
chemical
modification,
effectively
reinforced
polychloroprene
increasing
its
tensile
strength
by
3.5
times,
modulus
2
elongation
at
the
break
times.
However,
SSBR,
use
surface
modifiers
such
alkyl
isocyanates
improved
dispersion
efficiency
lignin.
Particularly,
in
SSBR
system
values
crossed
900%,
which
very
high
like
SSBR.
A
noticeable
improvement
was
observed
field
emission
scanning
electron
microscopy
when
situ
modification
done
isocyanates.
To
understand
effect
lignin,
various
mechanical,
dynamic
physical
tests
conducted
composites.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 20, 2025
ABSTRACT
Excessive
ultraviolet
(UV)
radiation
exposure
induces
photooxidative
stress
in
plants,
leading
to
severe
cell
damage.
Current
packaging
films
often
rely
on
nonrenewable,
petroleum‐based
UV
absorbers,
which
may
pose
potential
health
risks.
Calcium
lignosulfonate,
a
natural
byproduct
derived
from
the
pulp
and
paper
industry,
has
attracted
significant
attention
as
sustainable
alternative
absorbers.
In
this
study,
calcium
lignosulfonate
was
hydrophobically
modified
enhance
its
compatibility
with
nonpolar
low‐density
polyethylene
(LDPE),
UV‐blocking
composite
film
subsequently
fabricated.
The
hydrophobic
modification
significantly
increased
water
contact
angle
of
5°
101°.
Incorporating
into
LDPE
improved
both
melting
point
crystallinity
polymer.
resulting
demonstrated
excellent
performance,
achieving
UV‐A
blocking
rate
95%
UV‐B
99%,
effectively
mitigated
browning
“Fuji”
apples.
This
exhibits
great
for
anti‐photooxidation
applications
while
simultaneously
reducing
dependence
resources.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(44), P. 61123 - 61134
Published: Oct. 25, 2024
Highly
durable
color
superhydrophobic
coatings
have
attracted
much
attention
in
indoor
and
outdoor
decorative
applications.
In
this
paper,
colorful
with
excellent
durability
were
prepared
using
silane
coupling
agent-modified
iron
oxide
as
the
pigment
polydimethylsiloxane-compounded
epoxy
resin
base
material
by
three-step
method
of
"spraying–sanding–spraying".
The
is
low
cost,
has
a
simple
preparation
process,
enables
large-area
preparation,
restorative
function.
use
red,
yellow,
blue,
green
four
kinds
modified
oxides
through
single
or
multicolor
into
sand
can
be
obtained
variety
coatings,
silica
mixed
colors
from
light
to
dark
coatings.
coating
superhydrophobicity
self-cleaning
ability
withstand
sandpaper
abrasion,
water
impact,
UV
exposure,
environmental
testing.
suitable
for
interior
exterior
decoration
protection
wooden
buildings.
