ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(20), С. 7964 - 7975
Опубликована: Май 9, 2024
The
COVID-19
pandemic
has
incredibly
escalated
the
use
of
petroleum-based
disposable
facemasks,
posing
a
significant
environmental
burden.
In
response,
polylactide
acid
(PLA),
biobased
and
biodegradable
aliphatic
polymer,
been
considered
potential
alternative.
However,
applications
PLA
in
facemask
materials
are
hindered
by
its
inherent
brittleness,
poor
toughness,
slow
degradation
rate
environment.
Addressing
these
challenges,
this
study
explored
two
triesters
as
green
plasticizers
to
improve
fibrous
membranes
with
desired
mechanical
properties
biodegradability.
were
mixed
electrospun
into
membranes.
influence
varied
contents
on
filtration
efficiency,
morphology,
thermal
behavior,
properties,
is
systematically
investigated.
findings
reveal
that
proper
addition
(7%
content)
not
only
effectively
lowered
glass
transition
cold
crystallization
temperatures
from
65
52
°C
78
70
°C,
respectively,
without
compromising
performance
but
also
significantly
enhanced
material's
evidenced
increased
tensile
strength
0.44
1.08
MPa
elongation
at
break
1.32%
12.53%.
Furthermore,
plasticized
exhibited
an
enzymatic
34.18%
50
after
96
h,
more
than
2-fold
increase
compared
pure
PLA.
These
advancements
work
contribute
development
high-performance
eco-friendly
materials,
offering
sustainable
solution
challenges
posed
conventional
facemasks.
Advanced Materials Technologies,
Год журнала:
2023,
Номер
8(11)
Опубликована: Май 5, 2023
Abstract
Electrospinning
has
rapidly
progressed
over
the
past
few
decades
as
an
easy
and
versatile
way
to
fabricate
fibers
with
diameters
ranging
from
micrometers
tens
of
nanometers
that
present
unique
intricate
morphologies.
This
led
conception
new
technologies
diverse
methods
exploit
basic
electrohydrodynamic
phenomena
electrospinning
process,
which
in
turn
invention
novel
apparatuses
have
reshaped
field.
Research
on
revamping
conventional
principally
focused
achieving
three
key
objectives:
upscaling
process
while
retaining
consistent
morphological
traits,
developing
3D
nanofibrous
macrostructures,
formulating
fiber
configurations.
review
introduces
extensive
group
techniques
presents
a
comperative
study
based
apparatus
type
output.
Then,
each
process's
advantages
limitations
are
critically
assessed
identify
bona
fide
practicability
relevance
technological
breakthrough.
Finally,
outlook
future
developments
advanced
is
outlined,
emphasis
upscaling,
translational
research,
sustainable
manufacturing
prospective
solutions
current
shortcomings.
Polymers,
Год журнала:
2023,
Номер
15(4), С. 921 - 921
Опубликована: Фев. 12, 2023
Electrospun
porous
nanofibers
have
gained
a
lot
of
interest
recently
in
various
fields
because
their
adjustable
structure,
high
specific
surface
area,
and
large
number
active
sites,
which
can
further
enhance
the
performance
materials.
This
paper
provides
an
overview
common
polymers,
preparation,
applications
electrospun
nanofibers.
Firstly,
polymers
commonly
used
to
construct
structures
main
pore-forming
methods
by
electrospinning,
namely
template
method
phase
separation
method,
are
introduced.
Secondly,
recent
air
purification,
water
treatment,
energy
storage,
biomedicine,
food
packaging,
sensor,
sound
wave
absorption,
flame
retardant,
heat
insulation
reviewed.
Finally,
challenges
possible
research
directions
for
future
study
discussed.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(9), С. 3554 - 3564
Опубликована: Фев. 1, 2024
Development
of
poly(lactic
acid)
(PLA)
nanofibrous
membranes
(NFMs)
holds
great
potential
to
replace
the
conventional
nondegradable
air
filters,
but
is
largely
thwarted
by
intrinsically
low
electroactivity
and
poor
electret
properties
PLA.
Here,
highly
electroactive
PLA
NFMs
coupling
triboelectric
nanogenerator
(TENG)-based
recharging
mechanisms
are
demonstrated
for
long-term
respiratory
protection
from
fine
ultrafine
particulate
matters
(PM0.3
PM2.5),
as
well
wireless
intelligent
monitoring
physiological
characters.
To
enhance
in
situ
self-charging
NFMs,
we
proposed
a
stereocomplexation
strategy
involving
direct
electrospinning
PLLA/PDLA
nanofibers
(approaching
500
nm),
conferring
remarkable
promotion
phases,
dielectric
properties,
surface
(over
10
kV),
output
(nearly
20
V
at
humanoid
breathing
conditions).
Benefiting
well-tailored
morphology
features,
exhibited
high
(180
V)
excellent
filtration
performance
(96.32%
PM2.5
92.09%
PM0.3)
while
providing
desirable
resistance
(only
∼200
Pa
even
85
L/min),
far
surpassing
those
pristine
PLLA
counterpart
(60
V,
72.92%,
281
Pa,
respectively).
This
was
accompanied
high-sensitivity
vivo
cardiorespiratory
characters
such
coughing
breathing,
essentially
arising
respiration-triggered
distinct
TENG
mechanisms.
Featuring
efficient
noninvasive
monitoring,
our
biodegradable
appealing
healthcare
real-time
monitoring.
Nano Letters,
Год журнала:
2024,
Номер
24(8), С. 2643 - 2651
Опубликована: Фев. 14, 2024
Developing
high-performance
electromagnetic
interference
(EMI)
shielding
materials
that
are
lightweight
and
flexible
have
excellent
mechanical
properties
is
an
ideal
choice
for
modern
integrated
electronic
devices
microwave
protection.
Herein,
we
report
the
preparation
of
core–shell
polyaniline
(PANI)-based
nanofiber
membranes
EMI
through
seed
polymerization.
Electrospinning
a
PANI
solution
leads
to
homogeneously
dispersed
on
surface,
with
abundant
attachment
sites
aniline
electrostatic
adsorption
hydrogen
bonding
interaction,
allowing
grow
surfaces.
This
stable
heterostructure
provides
more
interfaces
reflecting
absorbing
microwaves.
The
PANI/PVDF@PANI
achieved
efficiency
(SE)
44.7
dB
at
thickness
only
1.2
mm,
exhibiting
exceptionally
high
specific
effectiveness
(SE/t)
372.5
cm–1.
Furthermore,
composite
membrane
exhibits
outstanding
stability,
durability,
air
permeability,
moisture
also
making
it
suitable
applications
such
as
EM
clothing.
