Polymer Composites,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 29, 2025
ABSTRACT
Excessive
ultraviolet
(UV)
radiation
causes
human
skin
damage
and
lesions,
accelerates
the
aging
of
polymer
materials.
UV‐shielding
materials
made
from
traditional
petroleum
are
not
biodegradable,
so
development
green
is
urgent.
In
this
study,
poly(lactic
acid)
(PLA)
was
toughened
by
polyethylene
glycol
(PEG),
nano‐ZnO
hybridized
cellulose
(MCC‐ZnO)
prepared
hydrothermal
method.
The
PLA/PEG/MCC‐ZnO
(PLA/PMZ)
composite
films
were
solution
casting
results
showed
that
toughness
PLA
significantly
improved
adding
5
wt%
PEG,
elongation
at
break
increased
5.2%
to
242.52%,
while
tensile
strength
basically
unchanged.
PLA/PMZ
with
3
MCC‐ZnO
have
excellent
UV
shielding
effect
satisfactory
transparency,
a
rate
92.2%
320
nm
visible
light
transmittance
41.7%.
Molecular
dynamics
simulations
interaction
between
PEG
promoted
formation
hydrogen
bonds
mechanical
properties
PLA/PMZ.
effect,
high
transparency
flexibility,
expected
be
widely
used
in
fields
outdoor
protection,
food
packaging
materials,
agricultural
films.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 9, 2025
Ultraviolet
(UV)
irradiation
is
dangerous
and
can
cause
serious
skin
diseases
if
excessively
exposed
to
it.
Thus,
it
highly
desirable
for
human
health
monitor
the
UV
radiation
intensity.
In
this
report,
a
flexible
stretchable
dual-response
detector
reported
by
integrating
UV-responsive
color-switchable
WO3
quantum
dots
(QDs)
with
an
electrical
hydrogel.
With
intensity
of
increasing
from
0.5
10
mW/cm2,
color
hydrogel
switched
dark
blue
gradually
due
excellent
photochromic
property
QDs
radiation.
Furthermore,
linear
relationship
be
established
between
difference
Hence,
under
solar
used
estimate
in
daily
life.
addition,
when
greater
than
converts
colorimetric
response
into
resistance
change.
its
properties
irradiation,
prepared
provides
idea
developing
novel
detection
instruments.
Polymer Engineering and Science,
Год журнала:
2024,
Номер
64(9), С. 4246 - 4257
Опубликована: Июнь 27, 2024
Abstract
The
purpose
of
UV
sensors
is
to
detect
ultraviolet
radiation,
which
crucial
for
various
applications,
such
as
skin
protection,
environmental
monitoring,
and
industrial
processes
where
exposure
poses
risks.
These
provide
real‐time
data
ensure
safety
optimize
performance
in
relevant
fields.
In
this
context,
the
aim
study
was
develop
easy‐to‐use
using
photochromic
nanofibrous
materials.
Photochromic
nanofibers
were
obtained
by
electrospinning
thermoplastic
polyurethane
a
spirooxazine
dye.
Two
solvent
systems
(only
dimethylformamide
dimethylformamide:dichloromethane
mixture)
three
dye
concentrations
(0.5%,
2%,
5%)
used
produce
nanofibers.
Uniform
bead‐free
system.
fatigue
resistance
tested,
revealing
maximum
color
loss
14%
after
20
on‐off
cycles.
Nanofibers
produced
with
system
0.5%
concentration
chosen
sensor
design
due
their
high
total
difference.
served
indicators,
grayscale‐
adapted
scale
evaluation.
A
prototype
capable
accurately
determining
levels
successfully
developed
This
spectrally
selective
can
offer
remarkable
potential
managing
impact
UVR
our
day‐to‐
day
life.
Highlights
Bead‐free,
uniform
DMF:DCM
returned
original
colorless
state
5
min.
showed
resistance.
nanofiber
indicated
intensity
comparing
via
grayscale.
Discover Sustainability,
Год журнала:
2024,
Номер
5(1)
Опубликована: Ноя. 26, 2024
Contrary
to
the
conventional
wisdom
and
practices
moderate
non-burning
ultraviolet
(UV)
radiation
may
be
beneficial
our
existence,
but
ecosystems
human
health
are
seriously
threatened
by
rise
in
UV
from
ozone
layer
loss
climate
change.
Nevertheless,
there
is
less
current
information
on
environmental
effects
of
elevated
stress.
This
review
looks
at
patterns
levels
today
emphasizes
causes,
which
include
anthropogenic
activities
ozone.
With
a
focus
physiological,
cellular,
ecological
mechanisms,
environment,
wildlife,
aquatic
terrestrial
ecosystems,
thoroughly
discussed.
Various
mitigation
tactics,
such
as
technological
ones
like
UV-protective
materials,
biological
breeding
UV-resistant
species,
policy
public
education
international
agreements,
discussed
here.
provides
thorough
understanding
potential
techniques
combining
these
various
strategies.
study
crucial
that
will
help
protect
against
harmful
environment
health.
