Advanced Healthcare Materials,
Год журнала:
2024,
Номер
14(4)
Опубликована: Дек. 11, 2024
Abstract
Constructing
hemostats
capable
of
effectively
controlling
severe
hemorrhage
from
irregular
wounds
presents
significant
challenges
and
imperatives.
In
this
study,
a
novel
approach
is
introduced
using
nanofibrous
chitin
microspheres
(NCM)
that
are
compressed
to
60%
strain
(NCM‐60%)
amplify
their
water‐initiated
expansion
performance.
This
unique
capacity
allows
NCM‐60%
efficiently
conform
fill
bleeding
cavities,
even
those
varying
depths
curvatures,
thereby
promoting
rapid
blood
coagulation
at
deep
sites.
exhibits
effective
control
femoral
artery
“J”‐shaped
liver
hemorrhages
in
151
±
6
s
68
15
s,
respectively,
revealing
its
exceptional
hemostatic
efficacy.
Furthermore,
exhibited
promising
capabilities
removing
microbes
water,
achieving
removal
rates
over
96%
bacteria.
Blood
compatibility
assessments
cytotoxicity
tests
further
confirmed
the
favorable
biocompatibility
NCM‐60%.
Importantly,
found
biodegrade
be
absorbed
vivo
within
12
weeks.
study
represents
first
instance
leveraging
nanofiber‐based
biomaterials
design
micro‐hemostat,
integrate
functions
with
waterborne
microorganism
removal,
expanding
potential
applications
micro‐nanostructural
materials
emergency
first‐aid
scenarios.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 12, 2024
Abstract
Personal
radiative
cooling
fabrics
are
a
promising
zero‐energy
solution
for
creating
cool
and
comfortable
microclimate
outdoor
crowds.
Despite
significant
progress,
achieving
efficient
under
some
extreme
situations,
such
as
thermal
shock
intensive
physical
activity,
remains
challenge.
Herein,
bioinspired
metafabric
with
dual‐gradient
Janus
design
is
reported
personal
evaporative
cooling.
The
hierarchical
fiber
structure
allows
an
excellent
solar
reflectance
of
99.4%
mid‐infrared
emittance
0.94,
inducing
skin
temperature
drop
17.8
°C
intense
sunlight.
Mesoporous
silica
nanoparticles
fixed
in
the
fibrous
network
can
store
capacity
by
atmospheric
moisture‐absorption
mild
humid
nighttime
release
moisture‐desorption
hot
daytime,
providing
additional
2.5
°C.
Dual‐gradient
endows
outstanding
sweat‐wicking
effect
high‐performance
sweat
capacity.
In
steady‐state
evaporation
tests,
maximum
consumption
only
0.5
ml
h
−1
to
temperature,
preventing
harmful
excessive
sweating.
Additionally,
also
possesses
favorable
wearability
color
expansibility.
Given
these
first‐rate
features,
will
pave
way
development
advanced
functional
fabrics.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 12, 2025
An
ideal
radiative
cooler
requires
high
emissivity
in
the
atmospheric
transparency
window
and
low
solar
energy
absorption.
Currently,
most
coolers
typically
reflect
sunlight
white,
limiting
their
aesthetics
for
various
applications.
Achieving
vibrantly
colored
poses
a
considerable
barrier,
since
colors
mostly
are
generated
by
absorbing
visible
light,
conflicting
with
demand
of
In
this
work,
we
propose
refractive
index
modulation
scheme
based
on
three-dimensional
anodic
alumina
network
(3D-AAN),
which
achieves
nonabsorbing
color-switchable
cooling
according
to
dynamic
photonic
bandgap
principle.
By
using
pulse
anodizing
selective
etching
methods,
construct
transverse
channels
inside
conventional
films,
connecting
hexagonal
vertical
form
large-scale
3D-AAN
colorful
appearance.
Outdoor
daytime
experiments
demonstrated
that
can
be
2.6
°C
lower
than
ambient
temperature
average
achieve
an
drop
7.0
silicon
substrate
under
sunlight.
Meanwhile,
tunable
color
power
achieved
reversibly
wetting
fluids.
This
provides
attractive
option
buildings
vehicles
inspires
further
development
design
cooling.
