Advanced Materials Technologies,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 27, 2024
Abstract
Recently,
hollow
fiber
polyelectrolyte
multilayer
membranes
(PEMMs)
have
shown
great
potential
for
removing
organic
micropollutants
from
wastewater
streams.
Currently,
these
PEMMs
are
made
with
the
selective
layer
on
inside
of
fiber.
However,
to
reduce
physical
footprint
PEMM
modules,
it
would
be
beneficial
outside.
This
will
lead
an
increased
surface
area
per
and
enable
use
smaller
mechanically
stronger
fibers,
which
further
increases
membrane
module.
To
prove
that
concept
outer‐skinned
is
feasible,
dry‐jet
wet‐spinning
process
used
fabricate
charged
supports,
they
coated
through
layer‐by‐layer
self‐assembly
form
a
PEMM.
Scanning
electron
microscopy
images
fibers
confirm
existence
asymmetric
structure
outer
skin,
while
fluorescence
imaging
confirms
located
outside
Filtration
experiments
showed
exhibited
nanofiltration
properties
similar
conventional
inner‐skinned
PEMMs.
Overall,
show
3.8x
increase
in
active
volume
ratio
compared
commercial
PEMMs,
clearly
highlighting
benefits
terms
footprint.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(24), С. 27940 - 27959
Опубликована: Март 23, 2024
Two-dimensional
(2D)
layered
materials
are
an
indispensable
cornerstone
of
modern
industry,
which
harnesses
their
strengths
and
creativity
for
energy,
catalysis,
sensors,
many
other
fields.
Nowadays,
science
has
transitioned
from
single-component
substances
to
multicomponent
composites,
how
efficiently
construct
multifunctional
composites
with
controllable
stable
structures
become
a
research
hotspot.
Among
available
preparation
techniques,
the
layer-by-layer
(LbL)
self-assembly
technology
is
one
most
efficient
strategies,
utilizes
noncovalent
weak
intermolecular
forces
achieve
binding
different
components
thus
exhibits
extensive
suitability
compared
traditional
methods.
Precise
molecular-level
control
structure
properties
LbL-assembled
can
be
achieved
through
selection
assembly
units
design
sequence.
Benefiting
these
merits,
laminated
have
been
widely
used
in
energy
conversion
storage,
optoelectronic
magnetic
devices,
drug
delivery,
separation
membranes,
so
on.
In
this
review,
we
summarize
recent
advances
current
mainstreams
LbL
technology,
including
van
der
Waals
(vdW)
assembly,
electrostatic
Langmuir–Blodgett
(LB)
hydrogen-bonded
assembly.
Moreover,
systematic
review
perspective
provided
not
only
on
applications
water
electrolysis,
lithium-ion
batteries,
optoelectronics,
devices
but
also
existing
challenges
future
directions
Journal of Membrane Science,
Год журнала:
2024,
Номер
709, С. 123087 - 123087
Опубликована: Июль 14, 2024
Recent
discovery
of
very
high
selectivity
Layer-by-Layer
(LBL)
nanofiltration
(NF)
membranes
for
mono/bivalent
ions
has
attracted
significant
attention,
especially
extraction
lithium
from
salt
lake
brines.
Besides
the
exceptionally
selectivity,
salinity
stability
in
highly
saline
solutions
(HSS)
that
often
occurred
during
NF
been
largely
neglected.
Intuitively,
because
LBL
are
assembled
a
background
solution,
assembly
disassembles
environments.
To
verify
above
argument,
we
reported
here
comprehensive
study
on
performance
polystyrene
sulfonate
(PSS)/poly(diallyldimethylammonium
chloride)
(PDADMAC)
and
PSS/poly(allylamine)
hydrochloride
(PAH)
HSS
by
short/long
term
immersion
dynamic
filtration.
Greater
binding
strength
(PSS/PAH)2.5
corresponded
to
better
than
(PSS/PDADMAC)2.5.
Adsorption
bridging
divalent
Mg2+
with
PSS
altered
conformation
narrowing
pore
size
distribution.
Compared
static
immersion,
filtration
accelerated
loss
PEs
at
cLiCl
=
2
mol/L,
but
membrane
was
improved
chemical
crosslinking.
This
research
highlighted
kinetic
aspects
chemical-physical
behavior
polyelectrolyte
complexes
(PECs)
HSS.
The
results
offer
valuable
insights
development
ion
separation
resource
recovery.
Advanced Membranes,
Год журнала:
2024,
Номер
4, С. 100102 - 100102
Опубликована: Янв. 1, 2024
Emerging
contaminants,
including
antibiotics,
threaten
water
safety
and
public
health.
To
remove
these
contaminants
while
retaining
beneficial
minerals
in
water,
such
as
calcium
(Ca),
a
novel
thin-film
composite
nanofiltration
(NF)
membrane
was
manufactured
through
polymerization
of
barrier
layer
composed
polypiperazine
amide
onto
polyvinylidene
fluoride
(PVDF)
hollow
fiber
(HF)
substrate.
The
pore
size
the
PVDF
surface
refined
by
introducing
poly(vinylpyrrolidone)
via
thermally
induced
phase
separation
method.
Then
piperazine
(PIP)
trimesoyl
chloride
were
selected
to
synthesize
NF
interfacial
with
NaHCO3
an
additive.
influence
PIP
concentration
on
morphology
performance
investigated.
optimized
HF
(NF3)
exhibited
high
permeability
(8.08
L/(m2
h
bar))
due
its
strong
hydrophilicity.
It
also
demonstrated
molecular
weight
cut-off
378
Da
enhanced
negative
charge
(−43.96
mV),
which
for
exclusion
antibiotics
passage
Ca2+.
tetracycline
rejection
(98.9
%)
enabled
NF3
achieve
superior
Ca2+/antibiotic
selectivity
(37.27)
compared
most
commercially
available
membranes.
This
study
offers
insights
into
tailoring
mineral/micropollutant
membranes
drinking
purification.
