Fluorescent
polypropylene-based
aerogels
from
thermoreversibly
crosslinked
networks
have
been
developed.
This
facile
and
efficient
synthesis
results
in
low-cost,
recyclable,
chemically
resistant,
highly
porous
functional
materials.
process
includes
the
chemical
crosslinking
of
polypropylene,
followed
by
thermal
phase
separation
freeze-drying,
yielding
with
specific
surface
areas
up
to
200
m2/g,
according
nitrogen
absorption-desorption
measurements.
is
significantly
higher
than
that
previously
reported
for
polypropylene
Besides
characterizations
polymer
infrared
spectroscopy
differential
scanning
calorimetry,
a
suite
analytical
techniques
was
utilized
characterize
skeletal
framework
aerogels,
including
electron
microscopy
small-angle
X-ray
scattering.
These
methods
revealed
nanostructural
features
interconnected
3D
networks.
The
modulation
excited-state
properties
incorporated
luminophore
demonstrated
provides
insights
into
their
potential
applications.
Importantly,
pronounced
ability
retain
toluene,
affecting
fluorescence
behavior
over
an
extended
time
scale.
conceptual
study
presents
low-cost
solution
preparation
materials
might
offer
versatility
functionality
may
open
door
further
exploration
design
high-performance
can
act
very
effectively
sensing
adsorption
organic
molecules.
also
provide
intriguing
direction
future
research
focusing
on
molecular
mechanisms
driving
observed
modulations.
Materials & Design,
Год журнала:
2024,
Номер
243, С. 113091 - 113091
Опубликована: Июнь 14, 2024
Amidst
the
rapid
advancements
in
materials
science,
exploration
of
aerogel-based
biomaterials
has
garnered
extensive
attention
across
diverse
sectors,
including
biomedicine,
energy,
architecture,
and
sensing.
Comprehensive
studies
have
unveiled
utilization
organic,
inorganic,
hybridized
for
aerogel
preparation,
catapulting
to
global
prominence.
Endowed
with
distinctive
properties,
low
density,
a
hierarchical
porous
network,
high
porosity,
nanoscale
micropores,
aerogels
exhibited
broad
spectrum
applications,
particularly
realm
tissue
engineering.
The
deployment
engineering
is
dynamic
phase
development,
available
reports
indicating
varying
degrees
fields
such
as
blood
vessels,
soft
tissues,
nerves,
skin,
muscles,
heart,
bronchial
tubes,
bone,
cartilage—an
evolutionary
process.
This
paper
offers
comprehensive
review
evolution
properties
preparation
processes,
encapsulating
strategic
insights
application
It
succinctly
summarizes
recent
developments
research,
emphasizing
their
significance.
Additionally,
outlines
future
prospects
envisions
challenges
arising
from
current
studies.
Through
this
thorough
engineering,
aspires
make
profound
impact
on
regenerative
medicine,
offering
innovative
effective
strategies
biomedicine.
Gels
are
attractive
candidates
for
drug
delivery
because
they
easily
producible
while
offering
sustained
and/or
controlled
release
through
various
mechanisms
by
releasing
the
therapeutic
agent
at
site
of
action
or
absorption.
can
be
classified
based
on
characteristics
including
nature
solvents
used
during
preparation
and
method
cross-linking.
The
development
novel
gel
systems
local
systemic
in
a
sustained,
controlled,
targetable
manner
has
been
epitome
recent
advances
systems.
Cross-linked
gels
modified
altering
their
polymer
composition
content
pharmaceutical
biomedical
applications.
These
modifications
have
resulted
stimuli-responsive
functionalized
dosage
forms
that
offer
many
advantages
effective
dosing
drugs
Central
Nervous
System
(CNS)
conditions.
In
this
review,
literature
concerning
cross-linked
to
CNS
explored.
Injectable
non-injectable
formulations
intended
treatment
diseases
together
with
impact
studies
involving
discussed.
ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(14), С. 8027 - 8039
Опубликована: Июль 12, 2024
In
this
work,
an
aerogel
with
excellent
flame
retardancy,
enhanced
compression
modulus,
and
efficient
thermal
insulation
was
developed
from
poly(vinyl
alcohol)
(PVA),
biobased
phytic
acid
(PA),
single-walled
carbon
nanohorns
(SWCNHs).
The
microstructural
evolution
of
the
freeze-dried
PVA/PA/SWCNH
composite
aerogels
revealed
that
varied
amounts
could
influence
three-dimensional
architecture.
Especially,
when
concentration
PA
1.5%,
PVA/PA/SWCNHs
a
tightly
arranged
"short
tubes"
structure
had
high
compressive
modulus
2.02
MPa,
corresponding
to
specific
20.2
MPa
cm3/g.
Compared
PVA/SWCNHs
aerogel,
showed
better
fire
as
confirmed
by
limited
oxygen
index
(LOI)
tests
cone
calorimetry
(CC)
tests.
Notably,
introduction
at
1.5%
resulted
in
LOI
values
up
49.8
±
0.1%
pHRR
THR
were
dramatically
reduced
74.3
81.0%,
respectively.
addition,
different
concentrations
exhibited
performance
slightly
lower
conductivity
(32.2–46.9
mW/(m
K))
resisted
∼1300
°C
flame.
Meanwhile,
synergistic
retardancy
between
SWCNHs
also
analysis
char
residues
gas-phase
products.
These
unique
characteristics
make
promising
multifunctional
candidate
for
applications
aviation,
aerospace,
other
fields.
Aerogels
are
materials
with
unique
properties,
among
which
low
density
and
thermal
conductivity.
They
also
known
for
their
exquisite
biocompatibility
biodegradability.
All
these
features
make
them
attractive
biomedical
applications,
such
as
potential
use
in
photothermal
therapy
(PTT).
This
technique
is,
yet,
still
associated
undesirable
effects
on
surrounding
tissues
emphasizes
the
need
to
minimize
exposure
of
healthy
regions.
One
way
do
so
relies
able
block
radiation
heat
generated.
might
be
potentially
useful
this
purpose
by
acting
insulators.
Silica-
pectin-based
aerogels
reported
best
inorganic
organic
insulators,
respectively;
thus,
aim
work
assessing
possibility
using
light
insulators
delimiters
PTT.
were
prepared
fully
characterized.
The
protection
efficacy
when
irradiated
a
near-infrared
laser
was
assessed
phantoms
ex
vivo
grafts.
Lastly,
safety
human
volunteers.
Both
types
presented
good
textural
properties
safe
profiles.
Moreover,
activation
unveils
better
performance
silica-based
aerogels,
confirming
material
Chemical and Biological Technologies in Agriculture,
Год журнала:
2023,
Номер
10(1)
Опубликована: Авг. 7, 2023
Abstract
Background
Lignin
is
a
naturally
occurring
and
aromatic
biopolymer
with
well-known
antimicrobial
antioxidant
properties.
Thus,
in
this
work,
the
use
of
cellulose
nanofibers
(CNF)
lignin
to
produce
ultra-light
aerogels
for
biomedical
applications
was
studied.
Aerogels
containing
varying
amounts
(0–30
wt%)
different
concentrations
crosslinking
agent
Fe
3+
(25–100
mM)
were
developed.
Results
The
bioaerogels
fully
characterized
their
physical,
mechanical
bioactive
properties
analyzed.
It
observed
that
soluble
fraction
tends
decrease
as
content
increases
concentrations,
due
lignin–CNF
interactions
through
hydrogen
bonds.
showed
remarkable
radical
scavenging
activity
DPPH
concentration
decreased
time.
This
confirms
benefits
including
impart
To
study
suitability
produced
controlled
drug
release,
release
tetracycline
(TC)
All
released
TC
sustained
manner
6
h
presented
similar
profiles.
However,
higher
crosslinker
TC.
loading
conferred
clear
against
S.
aureus
expected,
unlike
insignificant
without
biocompatibility
samples
demonstrated
all
materials
(with
loading)
by
Kruskal–Wallis
test
multiple
comparisons.
After
observation
cell
morphology,
no
significant
differences
evident
suggesting
CNF–lignin
present
optimal
pharmaceutical
industry.
Conclusions
work
highlights
promising
application
applications,
such
wound
dressings
biocompatibility,
properties,
well
swelling
solubility
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